S-19405 Series www.ablic.com AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 (c) ABLIC Inc., 2017-2020 The S-19405 Series is a watchdog timer developed using CMOS technology, which can operate with low current consumption of 3.8 A typ. The reset function and the low voltage detection function are available. ABLIC Inc. offers FIT rate calculated based on actual customer usage conditions in order to support customer functional safety design. For more information regarding our FIT rate calculation, contact our sales representatives. Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product for these purposes, it is imperative to contact our sales representatives. Features * Detection voltage: * Detection voltage accuracy: * Input voltage: * Hysteresis width: * Current consumption during watchdog timer operation: * Reset time-out period: * Watchdog time-out period: * Watchdog operation is switchable: * Watchdog operation voltage range: * Watchdog input edge is selectable: * Operation temperature range: * Lead-free (Sn 100%), halogen-free * AEC-Q100 qualified*1 *1. 2.0 V to 5.0 V, selectable in 0.1 V step 2.0% VDD = 0.9 V to 6.0 V 5% typ. 3.8 A typ. 14.5 ms typ. (CPOR = 2200 pF) 24.6 ms typ. (CWDT = 470 pF) Enable, Disable VDD = 2.5 V to 6.0 V Rising edge, falling edge Ta = -40C to +125C Contact our sales representatives for details. Applications * For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.) Packages * TMSOP-8 * HSNT-8(2030) 1 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Block Diagrams 1. S-19405 Series A / B Type CWDT VDD WEN Noise filter WDI Noise filter RST WDT circuit Reference voltage circuit WDO Voltage detection circuit VSS CPOR Figure 1 2. S-19405 Series D / E Type CWDT VDD WEN Noise filter WDI Noise filter RST WDT circuit Reference voltage circuit Voltage detection circuit VSS CPOR Figure 2 2 WDO AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 3. S-19405 Series G / H Type CWDT VDD WEN Noise filter WDI Noise filter RST WDT circuit Reference voltage circuit WDO Voltage detection circuit VSS CPOR Figure 3 4. S-19405 Series J / K Type CWDT VDD WEN Noise filter WDI Noise filter RST WDT circuit Reference voltage circuit WDO Voltage detection circuit VSS CPOR Figure 4 3 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 AEC-Q100 Qualified This IC supports AEC-Q100 for the operation temperature grade 1. Contact our sales representatives for details of AEC-Q100 reliability specification. Product Name Structure Users can select the product type, detection voltage, and package type for the S-19405 Series. Refer to "1. Product name" regarding the contents of product name, "2. Product type list" regarding the product types, "3. Packages" regarding the package drawings. 1. Product name S-19405 x xx A - xxxx U 4 Environmental code U: Lead-free (Sn 100%), halogen-free Package abbreviation and IC packing specifications*1 K8T2: TMSOP-8, Tape A8T1: HSNT-8(2030), Tape Operation temperature A: Ta = -40C to +125C Detection voltage 20 to 50 (e.g., when the detection voltage is 2.0 V, it is expressed as 20.) Product type*2 A, B, D, E, G, H, J, K *1. *2. 2. Refer to the tape drawing. Refer to "2. Product type list". Product type list Table 1 3. Constant Current Source Pull-down for WEN Pin A Active "H" Available Rising edge Available B Active "H" Available Falling edge Available D Active "L" Unavailable Rising edge Available E Active "L" Unavailable Falling edge Available G Active "H" Available Rising edge Unavailable H Active "H" Available Falling edge Unavailable J Active "L" Unavailable Rising edge Unavailable K Active "L" Unavailable Falling edge Unavailable Input Edge Packages Table 2 Package Name TMSOP-8 HSNT-8(2030) 4 Output Pull-up Resistor WEN Pin Logic Product Type Package Drawing Codes Dimension Tape Reel FM008-A-P-SD PP008-A-P-SD FM008-A-C-SD PP008-A-C-SD FM008-A-R-SD PP008-A-R-SD Land - PP008-A-L-SD AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series Pin Configurations 1. TMSOP-8 Table 3 Top view Pin No. 1 2 3 4 8 7 6 5 Figure 5 2. 1 2 3 4 5 6 7 8 Symbol RST CPOR CWDT VSS WEN ________ WDO WDI VDD Description _______ Reset output pin Reset time-out adjustment pin Watchdog time-out period adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin HSNT-8(2030) Table 4 Top view Pin No. 1 8 4 5 Bottom view 8 1 5 4 1 2 3 4 5 6 7 8 Symbol _______ RST CPOR CWDT VSS WEN ________ WDO WDI VDD Description Reset output pin Reset time-out adjustment pin Watchdog time-out period adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin *1 Figure 6 *1. Connect the heat sink of backside at shadowed area to the board, and set electric potential GND. However, do not use it as the function of electrode. 5 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Pin Functions Refer to " Operations" for details. 1. ________ RST pin This is a reset output pin. It outputs "L" when detecting a low voltage. _______ Be sure to connect an external pull-up resistor (RextR) to the RST pin in the product without an output pull-up resistor. 2. _________ WDO pin This is the watchdog output (time-out detection) pin. ________ Be sure to connect an external pull-up resistor (RextW) to the WDO pin in the product without an output pull-up ________ _______ resistor. Table 5 shows the WDO pin and RST pin output statuses. Table 5 ________ _______ WDO Pin Operation Status RST Pin Normal operation "H" "H" Low voltage detection "L" "L" Time-out detection "L" "H" When watchdog timer is in Disable "H" "H" 3. CPOR pin This is a pin to connect an adjustment capacitor for reset time-out period (CPOR) in order to generate the reset time-out period (tRST). CPOR is charged and discharged by an internal constant current circuit, and the charge-discharge duration is tRST. Refer to " Recommended Operation Conditions" and consider variation of CPOR to select an appropriate CPOR. tRST is calculated by using the following equation. tRST [ms] = CPOR delay coefficient x CPOR [nF] + tRST0 [ms] Item CPOR delay coefficient tRST0 [ms] Table 6 Min. Typ. Max. 3.9 0.0 6.5 0.2 9.1 0.6 4. CWDT pin This is a pin to connect an adjustment capacitor for watchdog time-out period (CWDT) in order to generate the watchdog time-out period (tWDU). CWDT is charged and discharged by an internal constant current circuit. Refer to " Recommended Operation Conditions" and consider variation of CWDT to select an appropriate CWDT. tWDU is calculated by using the following equation. tWDU [ms] = CWDT delay coefficient 1 x CWDT [nF] + tWDU0 [ms] Item CWDT delay coefficient 1 tWDU0 [ms] 6 Table 7 Min. 30 0.0 Typ. Max. 50 1.1 70 3.0 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 5. WEN pin This is a pin to switch Enable / Disable of the watchdog timer. The voltage detection circuit independently operates at all times regardless of the watchdog timer operation. In addition, the WEN pin has a noise filter. When the power supply voltage is 5.0 V, noise with a minimum pulse width of 200 ns can be eliminated. 5. 1 S-19405 Series A / B / G / H type (WEN pin logic active "H" product) The watchdog timer goes to Enable if the input is "H", and the charge-discharge operation is performed at the CWDT pin. The WEN pin is connected to a constant current source (0.3 A typ.) and is pulled down internally. 5. 2 S-19405 Series D / E / J / K type (WEN pin logic active "L" product) The watchdog timer goes to Enable if the input is "L", and the charge-discharge operation is performed at the CWDT pin. The WEN pin is not pulled down internally. 6. WDI pin This is an input pin to receive a signal from the monitored object. By inputting an edge at an appropriate timing, the WDI pin confirms the normal operation of the monitored object. The WDI pin is connected to a constant current source (0.3 A typ.) and is pulled down internally. If the WEN pin is in Disable after the initialization and reset release are performed subsequent to the power supply voltage rise, the WDI pin will be able to receive input signals after the WEN pin goes to Enable and then the input setup time (tiset) elapses. In addition, the WDI pin has a noise filter. When the power supply voltage is 5.0 V, noise with a minimum pulse width of 200 ns can be eliminated. 7 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Absolute Maximum Ratings Table 8 (Ta = -40C to +125C unless otherwise specified) Item Symbol Unit V V V V V _______ A / B / D / E type V RST pin voltage V RST G / H / J / K type V ________ A / B / D / E type V VWDO WDO pin voltage G / H / J / K type V Operation ambient temperature Topr C Storage temperature Tstg C Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. VDD pin voltage WDI pin voltage WEN pin voltage CPOR pin voltage CWDT pin voltage Absolute Maximum Rating VSS - 0.3 to VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VSS + 7.0 VSS - 0.3 to VDD + 0.3 VSS + 7.0 VSS - 0.3 to VSS + 7.0 -40 to +125 -40 to +150 VDD VWDI VWEN VCPOR VCWDT _______ ________ Thermal Resistance Value Table 9 Item Symbol Condition TMSOP-8 Junction-to-ambient thermal resistance*1 Typ. Max. Unit Board A - 160 - C/W Board B - 133 - C/W Board C - - - C/W Board D - - - C/W Board E - - - C/W Board A - 181 - C/W Board B - - C/W Board C - 135 40 - C/W Board D - 42 - C/W Board E Test environment: compliance with JEDEC STANDARD JESD51-2A - 32 - C/W JA HSNT-8(2030) *1. Min. Remark Refer to " Power Dissipation" and "Test Board" for details. Recommended Operation Conditions Table 10 Item 8 Symbol Condition Voltage detection circuit Min. Typ. Max. Unit 0.9 - 6.0 V VDD pin voltage VDD Watchdog timer circuit 2.5 - 6.0 V Set detection voltage External pull-up resistor _______ for RST pin External pull-up resistor ________ for WDO pin Adjustment capacitance for reset time-out period Adjustment capacitance for watchdog time-out period -VDET(S) 0.1 V step 2.0 - 5.0 V RextR G / H / J / K type 10 100 - k RextW G / H / J / K type 10 100 - k CPOR - 0.1 2.2 1000 nF CWDT - 0.1 0.47 1000 nF AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series Electrical Characteristics Table 11 (1 / 2) (WEN pin logic active "H" product, VDD = 5.0 V, Ta = -40C to +125C unless otherwise specified) Item Symbol Condition Min. Typ. Max. Unit Test Circuit Detection voltage*1 -VDET - -VDET(S) x 0.98 -VDET(S) -VDET(S) x 1.02 V 1 Hysteresis width VHYS - -VDET x 0.03 -VDET x 0.05 -VDET x 0.07 V 1 Current consumption during watchdog timer operation Current consumption during watchdog timer stop ISS1 VWEN = VDD - 3.8 9.0 A 2 ISS2 VWEN = 0 V - 2.7 7.0 A 2 Reset output voltage "H" VROH Only A / B / D / E type VDD - 1.0 - - V 4 Reset output voltage "L" VROL External pull-up resistor of 100 k is connected for G / H / J / K type - - 0.4 V 5 Reset output pull-up resistance RRUP Only A / B / D / E type 2.0 5.88 12.5 M - Reset output current IROUT Reset output leakage current IRLEAK VDS = 0.4 V VDD = 1.5 V 0.48 1.1 - mA 6 VDD = 1.8 V 0.8 1.6 - mA 6 VDD = 2.5 V 1.0 2.6 - mA 6 VDD = 3.0 V 1.4 3.3 - mA 6 - - 0.096 A 7 VDD - 1.0 - - V 8 - - 0.4 V 9 2.0 5.88 12.5 M - VDD = 1.5 V 0.48 1.1 - mA 10 VDD = 1.8 V 0.8 1.6 - mA 10 VDD = 2.5 V 1.0 2.6 - mA 10 VDD = 3.0 V 1.4 3.3 - mA 10 - - 0.096 A 11 VDS = 6.0 V, VDD = 6.0 V Watchdog output voltage "H" VWOH Only A / B / D / E type Watchdog output voltage "L" VWOL External pull-up resistor of 100 k is connected for G / H / J / K type Watchdog output pull-up resistance RWUP Only A / B / D / E type Watchdog output current IWOUT VDS = 0.4 V Watchdog output leakage current IWLEAK VDS = 6.0 V, VDD = 6.0 V Input pin voltage 1 "H" VSH1 WEN pin 0.7 x VDD - - V 12 Input pin voltage 1 "L" VSL1 - 0.3 x VDD V 12 VSH2 WEN pin WDI pin - Input pin voltage 2 "H" 0.7 x VDD - - V 12 VSL2 WDI pin - - 0.3 x VDD V 12 Input pin voltage 2 "L" 9 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Table 11 (2 / 2) (WEN pin logic active "H" product, VDD = 5.0 V, Ta = -40C to +125C unless otherwise specified) Item Input pin current 1 "H" Symbol ISH1 Condition Min. Typ. Max. Unit Test Circuit - 0.3 1.0 A 12 A/B/G/ WEN pin, H type VDD = 6.0 V, D/E/J/ Input pin voltage = 6.0 V K type WEN pin, VDD = 6.0 V, Input pin voltage = 0 V WDI pin, VDD = 6.0 V, Input pin voltage = 6.0 V WDI pin, VDD = 6.0 V, Input pin voltage = 0 V -0.1 - 0.1 A 12 -0.1 - 0.1 A 12 - 0.3 1.0 A 12 -0.1 - 0.1 A 12 Input pin current 1 "L" ISL1 Input pin current 2 "H" ISH2 Input pin current 2 "L" ISL2 Input pulse width "H"*2 thigh1 Timing Diagram 1 1.5 - - s 13 Input pulse width "L"*2 tlow1 Timing Diagram 1 1.5 - - s 13 Reset time-out period tRST CPOR = 2200 pF, Timing Diagram 2, 5 8.7 14.5 20 ms 3 Watchdog time-out period tWDU CWDT = 470 pF, Timing Diagram 4, 5 15 24.6 34 ms 3 Watchdog output delay time Timing Diagram 2, 3-2 - 25 40 s 3 tWOUT Timing Diagram 2, 3-1 - s tROUT 25 40 3 Timing Diagram 4 - - s Input setup time tiset 1.0 3 *1. -VDET: Actual detection voltage, -VDET(S): Set detection voltage *2. Inputs to the WEN pin and the WDI pin should be greater than or equal to the min. value specified in " Electrical Characteristics". Reset output delay time Timing Diagrams on Electrical Characteristics (1) Timing Diagram 1 thigh1 WEN VSH1 VSH1 VSL1 VSL1 tlow1 thigh1 WDI VSH2 VSH2 VSL2 VSL2 tlow1 Figure 7 10 Input Pulse Width AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series (2) Timing Diagram 2 VDD +VDET 0V 1 2 3 4 V CPU CPOR V CPL 0V tRST*2 t*1 tRST tINIT WDO, RST V WOH ,VROH tWOUT, tROUT Figure 8 (3) Timing Diagram 3-1 VDD Rising (4) Timing Diagram 3-2 VDD VDD -V DET VCPU CPOR -V DET VCWU CWDT VCPL VCWL t 1*3 t 2*3 RST WDO, RST VROL tROUT Figure 9 VDD Falling during CPOR Pin Charge Operation VWOL,V ROL t WOUT, t ROUT Figure 10 VDD Falling during CWDT Pin Charge Operation *1. The CPOR pin voltage fall delay time (t) is sufficiently small compared to the reset time-out period (tRST). *2. The time (tRST) the CPOR pin voltage (VCPOR) reaches the CPOR charge lower limit threshold (VCPL) from 0 V is proportional to the adjustment capacitance for reset time-out period (CPOR). Thus, large CPOR results in large tRST. Refer to "12. Initialization time (tINIT) vs. Power supply voltage rise time (tr)" in " Characteristics (Typical Data)". *3. CPOR pin voltage forced fall delay time (t1) and the CWDT pin voltage forced fall delay time (t2) is sufficiently small compared to tRST in Timing Diagram 2. Remark VCPU: CPOR charge upper limit threshold (1.25 V typ.), VCPL: CPOR charge lower limit threshold (0.20 V typ.) VCWU: CWDT charge upper limit threshold (1.25 V typ.), VCWL: CWDT charge lower limit threshold (0.20 V typ.) 11 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 (5) Timing Diagram 4 WEN VSH1 tSH1 VSL1 1 31 2 32 CWDT VCWU tacp VCWL tiset tWDU tWDL*2 t*1 Figure 11 Counter Reset due to VWEN (6) Timing Diagram 5 1 2 3 CPOR 4 V CPU V CPL 1 31 2 32 CWDT V CWU V CWL t *3 t WDL (t + t WDL)*3 t*4 tRST t WDU Figure 12 (t + tRST)*4 t RST Watchdog Time-out Detection *1. CWDT pin voltage forced fall delay time (t) is sufficiently small compared to the watchdog time-out period (tWDU). *2. The CWDT pin voltage rise delay time (tiset + tWDL) is sufficiently small (less than 1%) compared to tWDU. *3. The delay time (t + tWDL) from when the CPOR pin voltage (VCPOR) falls to the CPOR charge lower limit threshold (VCPL) to when the CWDT pin voltage (VCWDT) reaches the CWDT charge lower limit threshold (VCWL) is sufficiently small (less than 1%) compared to tWDU. *4. The delay time (t + tRST) from when VCWDT falls to VCWL to when VCPOR reaches VCPL is sufficiently small (less than 5%) compared to reset time-out period (tRST). Remark tiset: Input setup time (less than 1 s) The time from when VWEN exceeds VSH1 (tSH1) to when the WDI pin is able to receive input signals (tacp). 12 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series (7) Timing Diagram 6-1 (8) Timing Diagram 6-2 WDI WDI 1 1 2 CWDT VCWU CWDT 2 VCWU VCWL VCWL 0V 0V t*2 t*1 t WDL Figure 13 tWDL*3 *3 VWDI Rising Edge Figure 14 VWDI Falling Edge (9) Timing Diagram 6-3 WDI *4 CWDT VCWU VCWL 0V t WDL t WDL*3 t WDL2 Figure 15 VWDI Rising or Falling Edges *1. The delay time (t) from the WDI pin voltage (VWDI) rising edge to the CWDT pin voltage (VCWDT) rising start is sufficiently small (less than 1%) compared to tWDU in Timing Diagram 4 and 5. *2. The delay time (t) from the VWDI falling edge to the VCWDT rising start is sufficiently small (less than 1%) compared to tWDU in Timing Diagram 4 and 5. *3. The time (tWDL) VCWDT reaches VCWL from 0 V is proportional to the adjustment capacitance for watchdog time-out period (CWDT). Thus, large CWDT results in large tWDL. *4. As indicated by the waveform illustrated with dashed lines, if VCWDT does not fall to 0 V when the VWDI rising or falling edge is input, tWDL may approach 0. Similar phenomena may occur in Timing Diagrams 6-1 to 6-3 as well. 13 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Test Circuits Refer to " Recommended Operation Conditions" when setting constants of external pull-up resistors (RextR, RextW) and external capacitors (CPOR, CWDT). (1) A / B / D / E type (2) G / H / J / K type VDD CPOR VDD CPOR WDO CWDT CWDT WDI RST WEN V V Figure 16 RST WEN V VSS + WDI + + WDO V + + VSS Test Circuit 1 A VDD CPOR WDO CWDT WDI WEN RST VSS Figure 17 Test Circuit 2 (1) A / B / D / E type (2) G / H / J / K type VDD VDD CPOR CWDT CPOR WDO CWDT WDI RST WEN V WDI + 14 RST WEN VSS VSS Figure 18 WDO Test Circuit 3 V + AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series VDD CPOR WDO CWDT WDI WEN RST V VSS Figure 19 + Test Circuit 4 (1) A / B / D / E type (2) G / H / J / K type VDD CPOR VDD CPOR WDO CWDT WDI WDI WEN WEN RST V VSS + Figure 20 VDD CPOR RST V VSS + Test Circuit 5 VDD CPOR WDO CWDT CWDT WDI RST WEN A WDO WDI + RST WEN VSS Figure 21 WDO CWDT A + VSS Test Circuit 6 Figure 22 Test Circuit 7 VDD CPOR CWDT WDO WDI WEN RST V + VSS Figure 23 Test Circuit 8 15 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 (1) A / B / D / E type (2) G / H / J / K type VDD CPOR CWDT VDD CPOR WDO CWDT WDI RST WEN V WDI + RST WEN Figure 24 VDD CPOR WDO A VDD CPOR + CWDT WEN RST + VSS Test Circuit 10 Figure 26 (1) A / B / D / E type Test Circuit 11 (2) G / H / J / K type VDD VDD CPOR CPOR CWDT WDO WEN, WDI RST CWDT V + + A WDO WEN, WDI RST V + VSS VSS Figure 27 (1) A / B / D / E type Test Circuit 12 (2) G / H / J / K type VDD VDD CPOR CPOR CWDT WDO WEN, WDI RST CWDT V + VSS Figure 28 WDO WEN, WDI RST VSS 16 A RST VSS A WDO WDI WEN + + Test Circuit 9 WDI Figure 25 V VSS VSS CWDT WDO Test Circuit 13 V + AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series Standard Circuits 1. S-19405 Series A / B / D / E type VDD VDD WDO WEN WDI RST VSS CPOR CWDT CWDT*2, *3 CPOR*1, *3 *1. *2. *3. Connect the adjustment capacitor for reset time-out period (CPOR) directly between the CPOR pin and the VSS pin. Connect the adjustment capacitor for watchdog time-out period (CWDT) directly between the CWDT pin and the VSS pin. A capacitor of 100 pF to 1 F can be used for CPOR and CWDT. Even if the capacitance is within this range, cautions are still needed when the value is extremely large. Refer to "1. Low voltage operation when CPOR is extremely large" in " Precautions for Use". Figure 29 2. S-19405 Series G / H / J / K type RextW*1 VDD VDD WDO WEN RextR*2 WDI RST VSS CPOR*3, *5 CPOR CWDT CWDT*4, *5 ________ *1. RextW is an external pull-up resistor for the _______ WDO pin. *2. RextR is an external pull-up resistor for the RST pin. *3. Connect the adjustment capacitor for reset time-out period (CPOR) directly between the CPOR pin and the VSS pin. *4. Connect the adjustment capacitor for watchdog time-out period (CWDT) directly between the CWDT pin and the VSS pin. *5. A capacitor of 100 pF to 1 F can be used for CPOR and CWDT. Even if the capacitance is within this range, cautions are still needed when the value is extremely large. Refer to "1. Low voltage operation when CPOR is extremely large" in " Precautions for Use". Figure 30 Caution The above connection diagrams and constants will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constants. 17 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Operations 1. Voltage detector circuit 1. 1 Basic operation (1) When the power supply voltage (VDD) is release voltage (+VDET) of the detector or higher, the Nch transistor _______ (N2) is turned off and "H" is output to the RST pin. Since the Pch transistor (P1) is turned on, RB * VDD . the input voltage to the comparator (C1) is RA + RB _______ (2) Even if VDD decreases to +VDET or lower, "H" is output to the RST pin when VDD is the detection voltage (-VDET) or higher. When VDD decreases to -V DET (point A in Figure 32) or lower, N2 which is controlled by C1 is turned _______ on, and then "L" is output to the RST pin. At this time, P1 is turned off, and the input voltage to C1 is RB * VDD . RA + RB + RC _______ is "H". (3) If VDD further decreases to the IC's minimum operation voltage or lower, the RST pin output _______ (4) When VDD increases to the IC's minimum operation voltage or higher, "L" is output to the RST pin. In addition, even if VDD exceeds -VDET, the output is "L" when VDD is lower than +VDET. _______ (5) When VDD increases to +VDET (point B in Figure 32) or higher, N2 is turned off, and "H" is output to the RST pin after elapse of tINIT + tRST. VDD P1 RC _______ RA Reference voltage circuit + - C1 RST Delay circuit N2 RB VSS Figure 31 Operation of Voltage Detector Circuit (1) (2) (3) (4) B Hysteresis width (VHYS) A (5) Release voltage (+VDET) Detection voltage (-VDET) VDD Minimum operation voltage VSS _______ RST pin output, ________ WDO pin output VSS tINIT + tRST Figure 32 18 Timing Chart of Voltage Detector Circuit AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 1. 2 From power-on to reset release The S-19405 Series initiates the initialization if the VDD pin voltage exceeds the release voltage (+VDET). The ________ charge-discharge operation_______ to the CPOR pin is initiated after the passage of the initialization time (tINIT), and the WDO pin output and the RST pin output change from "L" to "H" after the operation is performed 4 times. Refer to Figure 33. tINIT changes according to the power supply voltage rise time (tr). Refer to "12. Initialization time (tINIT) vs. Power supply voltage rise time (tr)" in " Characteristics (Typical Data)" for the relation between tINIT and tr. Power-on End of initialization Reset release VDD 0V CPOR 1 2 3 4 RST WDO Figure 33 1. 3 Operation of low voltage detection The voltage detection circuit detects a low voltage_______ if the power supply voltage falls below the detection voltage, and ________ then "L" is output from the WDO pin and the RST pin. The output is maintained until the charge-discharge operation of the CPOR pin is performed 4 times. The S-19405 Series can detect a low voltage even if either the CPOR pin or the CWDT pin performs the charge-discharge operation. In this case, no influence is exerted on the status of the WEN pi. End of initialization End of initialization Low voltage Low voltage Low voltage Power-on Reset release detection release detection VDD 0V CPOR 1 2 3 4 CWDT RST WDO Figure 34 19 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 2. Watchdog timer 2. 1 From reset release to initiation of charge-discharge operation to CWDT pin The charge-discharge operation to the CWDT pin differs depending on the status of the WEN pin at the reset release. 2. 1. 1 When WEN pin is in Enable at reset release Since the watchdog timer is in Enable, the S-19405 Series initiates the charge-discharge operation to the CWDT pin. Power-on End of initialization Reset release VDD 0V WEN CPOR CWDT RST WDO Figure 35 2. 1. 2 WEN Pin = "H" When WEN pin is in Disable at reset release Since the watchdog timer is in Disable after the CPOR pin performs the charge-discharge operation 4 times, the S-19405 Series does not initiate the charge-discharge operation to the CWDT pin. If the input to the WEN pin changes to "H" in this status, the S-19405 Series initiates the charge-discharge operation to the CWDT pin. Power-on End of initialization Reset release VDD 0V WEN (WDT (WDT ) CPOR CWDT RST WDO Figure 36 20 WEN Pin = "L" "H" ) AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 2. 2 Watchdog time-out detection The watchdog timer detects a time-out after the charge-discharge operation to the CWDT pin is performed 32 times, ________ then the WDO pin output changes from "H" to "L". Power-on End of initialization Watchdog time-out Reset release Reset time-out VDD 0V WDI 1 2 3 4 CPOR 1 2 3 4 5 CWDT 29 30 31 32 RST WDO Figure 37 2. 3 Internal counter reset due to edge When the WDI pin detects an edge during the charge-discharge operation to the CWDT pin, the internal counter which counts the number of times of the charge-discharge operation is reset. The CWDT pin initiates the discharge operation when an edge is detected and initiates the charge-discharge operation again after the discharge operation is completed. 2. 3. 1 Counter reset due to rising edge (S-19405AxxA, S-19405DxxA, S-19405GxxA, S-19405JxxA) End of Power-on initialization Reset release Rising edge Watchdog time-out VDD 0V WDI CPOR CWDT 1 2 3 4 5 29 30 31 32 RST WDO Figure 38 21 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 2. 3. 2 Counter reset due to falling edge (S-19405BxxA, S-19405ExxA, S-19405HxxA, S-19405KxxA) Power-on End of initialization Reset release Watchdog time-out Falling edge VDD 0V WDI CPOR 1 2 3 4 5 CWDT 29 30 31 32 RST WDO Figure 39 2. 4 Counter reset due to WEN pin during the charge-discharge operation to CWDT pin When the WEN pin changes from "H" to "L" during the charge-discharge operation to the CWDT pin, the CWDT pin performs the discharge operation. In addition, the internal counter which counts the number of times of the charge-discharge operation for the CWDT pin is also reset. If the WEN pin changes to "H" again in this status, the CWDT pin initiates the charge-discharge operation. End of Power-on initialization Watchdog time-out Reset release VDD 0V Enable Enable Enable WEN CPOR Disable 1 2 3 4 Disable 1 2 3 CWDT RST WDO Figure 40 22 29 30 31 32 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series Precautions for Use A capacitor of 100 pF to 1 F can be used for the adjustment capacitor for reset time-out period (CPOR) and the adjustment capacitor for watchdog time-out period (CWDT). Even if the capacitance is within this range, cautions are still needed when the value is extremely large. 1. Low voltage operation when CPOR is extremely large When the S-19405 Series detects a low voltage during the CPOR charge-discharge operation, it will take time for the CPOR discharge operation to be performed if CPOR is extremely large. Therefore, the discharge operation may not be completed by the time the power supply voltage (VDD) exceeds the release voltage (+VDET). In this case, since the charge-discharge operation is performed after the discharge operation is completed, a delay time of the same length as the CPOR discharge operation time occurs by the time the reset time-out period (tRST) count starts. Low voltage detection VDD +VDET CPOR *1 VCPL tRST CPOR *2 VCPL *3 tRST *1. When the capacitance is sufficiently small. *2. When the capacitance is extremely large. *3. Delay time of the same length as the CPOR discharge operation time Figure 41 23 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 2. Re-applying power supply If the power supply voltage (VDD) falls to 0.9 V or lower, a standby status for 20 s is required by the time low voltage detection is released in order for the discharge operation of internal circuit to be performed fully. If an appropriate amount of time is not secured for the standby status to be completed by the time the power supply is re-applied, the initialization start will be delayed. For this reason, a delay time of the same length as the time until the standby status has been completed occurs by the time the tRST count starts after the power supply rises. 2. 1 If the time from when VDD falls below 0.9 V to when it rises again is longer than 20 s +VDET V DD 0.9 V 20 s Nomal operation Nomal operation Standby CPOR VCPL t INIT t RST Figure 42 2. 2 If the time from when VDD falls below 0.9 V to when it rises again is shorter than 20 s +VDET VDD 0.9 V 20 s Nomal operation Nomal operation Standby CPOR VCPL *1 *1. t RST Delay time of the same length as the time until standby status at power-on has been completed Figure 43 24 tINIT AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 3. Low voltage detection at instantaneous voltage drop ________ _______ In the S-19405 Series, when the period of 0.9 V VDD -VDET is shorter than 20 s, the WDO pin and the RST pin may not output a low voltage detection signal. Even in this case, the S-19405 Series carries out the charge-discharge operation for CPOR in the same manner at power-on. For this reason, a delay time of the same length as the CPOR charge-discharge operation time occurs by the time the tWDU count starts after the power supply rises. VDD -VDET +VDET 0.9 V < 20 s CPOR *1 CWDT VCWL tWDU WDO "H" Undetection RST "H" Undetection *1. Delay time of the same length as the CPOR discharge operation time (tINIT + tRST) Figure 44 Precautions * Since input pins (the WEN pin and the WDI pin) in the S-19405 Series are CMOS configurations, make sure that an intermediate potential is not input when the S-19405 Series operates. ________ _______ * Since the WDO pin and the RST pin are affected by external resistance and external capacitance, use the S-19405 Series after performing thorough evaluation with the actual application. * Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic protection circuit. * ABLIC Inc. claims no responsibility for any disputes arising out of or in connection with any infringement by products including this IC of patents owned by a third party. 25 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Characteristics (Typical Data) 1. Current consumption during watchdog timer stop (ISS2) vs. 2. Current consumption during watchdog timer operation (ISS1) vs. Input voltage (VDD) Input voltage (VDD) 5.0 WDT = OFF, -VDET(S) = 4.0 V, Ta = +25C 5.0 4.5 ISS1 [A] ISS2 [A] 4.0 WDT = ON, -VDET(S) = 4.0 V, WDI input 3.0 2.0 1.0 - C + C 4.0 + 3.5 C 3.0 0.0 0 1 2 3 4 5 4.0 6 4.5 VDD [V] 5.0 5.5 VDD [V] 6.0 6.5 3. Current consumption during watchdog timer operation (ISS1) vs. 4. Detection voltage (-VDET), Release voltage (+VDET) vs. Temperature (Ta) Temperature (Ta) WDT = ON, -VDET(S) = 4.0 V, VDD = 5.0 V, WDI input 5.0 -VDET, +VDET [V] ISS1 [A] 4.0 3.0 2.0 1.0 0.0 -40 -25 0 25 50 Ta [C] 75 100 20 10 -40 -25 0 25 50 Ta [C] 75 100 10 -40 -25 0 25 50 Ta [C] 75 100 125 25 50 Ta [C] 75 100 125 VDD = 5.0 V, CWDT = 470 pF 30 20 10 0 -40 -25 0 25 50 Ta [C] 75 100 125 8. Watchdog output delay time (tWOUT) vs. Temperature (Ta) VDD = 5.0 V, CWDT = 470 pF 40 tWOUT [s] 20 0 40 VDD = -VDET(S) + 1.0 V -VDET(S) - 1.0 V, CPOR = 2200 pF 30 tROUT [s] 3.5 6. Watchdog time-out period (tWDU) vs. Temperature (Ta) 125 7. Reset output delay time (tROUT) vs. Temperature (Ta) 26 -VDET -40 -25 tWDU [ms] tRST [ms] 30 0 +VDET 4.0 125 VDD = 5.0 V, CPOR = 2200 pF 40 40 -VDET(S) = 4.0 V 3.0 5. Reset time-out period (tRST) vs. Temperature (Ta) 0 4.5 30 20 10 0 -40 -25 0 25 50 Ta [C] 75 100 125 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.1.4_00 S-19405 Series 9. Reset time-out period (tRST) vs. CPOR 10. VDD = 5.0 V, Ta = +25C 10 VDD = 5.0 V, Ta = +25C 10 tWDU [s] tRST [s] 1 0.1 0.01 0.001 0.001 0.01 CPOR [F] 0.1 0.1 0.001 0.0001 1 11. Nch driver output current (IWOUT) vs. Input voltage (VDD) 100 4.0 - C 10 tINIT [ms] + C 2.0 + 0 1 2 3 VDD [V] 4 0.01 CWDT [F] 0.001 0.1 1 12. Initialization time (tINIT) vs. Power supply voltage rise time (tr) VDS = 0.4 V, -VDET(S) = 4.0 V 6.0 IWOUT [mA] 1 0.01 0.0001 0.0001 0.0 Watchdog time-out period (tWDU) vs. CWDT VDD = VWEN = 0 V 6 V, CPOR = 100 pF, Ta = +25C - 1 - - 0.1 C 5 0.01 0.001 0.01 0.1 1 tr [ms] 10 100 1000 27 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION S-19405 Series Rev.1.4_00 Power Dissipation TMSOP-8 HSNT-8(2030) Tj = +125C max. 0.8 B 0.6 A 0.4 0.2 0.0 0 25 50 75 100 125 150 175 Tj = +125C max. 5 Power dissipation (PD) [W] Power dissipation (PD) [W] 1.0 4 E 3 C 2 D B 1 0 A 0 25 Ambient temperature (Ta) [C] 75 100 125 150 Ambient temperature (Ta) [C] Power Dissipation (PD) Board Power Dissipation (PD) A 0.63 W A 0.55 W B B 0.74 W C 0.75 W - C 2.50 W D - D 2.38 W E - E 3.13 W Board 28 50 175 TMSOP-8 Test Board (1) Board A ICMountArea Item Size [mm] Material Number of copper foil layer Copper foil layer [mm] 1 2 3 4 Thermal via Specification 114.3 x 76.2 x t1.6 FR-4 2 Land pattern and wiring for testing: t0.070 74.2 x 74.2 x t0.070 - (2) Board B Item Size [mm] Material Number of copper foil layer Copper foil layer [mm] Thermal via 1 2 3 4 Specification 114.3 x 76.2 x t1.6 FR-4 4 Land pattern and wiring for testing: t0.070 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.070 - No. TMSOP8-A-Board-SD-1.0 ABLIC Inc. HSNT-8(2030) Test Board ICMountArea (1) Board A Item Size [mm] Material Number of copper foil layer Copper foil layer [mm] 1 2 3 4 Thermal via Specification 114.3 x 76.2 x t1.6 FR-4 2 Land pattern and wiring for testing: t0.070 74.2 x 74.2 x t0.070 - (2) Board B Item Size [mm] Material Number of copper foil layer Copper foil layer [mm] 1 2 3 4 Thermal via Specification 114.3 x 76.2 x t1.6 FR-4 4 Land pattern and wiring for testing: t0.070 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.070 - (3) Board C Item Size [mm] Material Number of copper foil layer Copper foil layer [mm] Thermal via 1 2 3 4 Specification 114.3 x 76.2 x t1.6 FR-4 4 Land pattern and wiring for testing: t0.070 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.070 Number: 4 Diameter: 0.3 mm enlargedview No. HSNT8-A-Board-SD-2.0 ABLIC Inc. HSNT-8(2030) Test Board ICMountArea (4) Board D Item Size [mm] Material Number of copper foil layer Specification 114.3 x 76.2 x t1.6 FR-4 4 Thermal via 2 Pattern for heat radiation: 2000mm t0.070 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.070 - Item Size [mm] Material Number of copper foil layer Specification 114.3 x 76.2 x t1.6 FR-4 4 Copper foil layer [mm] 1 2 3 4 enlargedview (5) Board E Copper foil layer [mm] Thermal via 1 2 3 4 2 Pattern for heat radiation: 2000mm t0.070 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.035 74.2 x 74.2 x t0.070 Number: 4 Diameter: 0.3 mm enlargedview No. HSNT8-A-Board-SD-2.0 ABLIC Inc. 2.900.2 8 5 1 4 0.130.1 0.20.1 0.650.1 No. FM008-A-P-SD-1.2 TITLE TMSOP8-A-PKG Dimensions No. FM008-A-P-SD-1.2 ANGLE UNIT mm ABLIC Inc. 2.000.05 4.000.1 4.000.1 1.000.1 +0.1 1.5 -0 1.050.05 0.300.05 3.250.05 4 1 5 8 Feed direction No. FM008-A-C-SD-2.0 TITLE TMSOP8-A-Carrier Tape FM008-A-C-SD-2.0 No. ANGLE UNIT mm ABLIC Inc. 16.5max. 13.00.3 Enlarged drawing in the central part 130.2 (60) (60) No. FM008-A-R-SD-1.0 TITLE TMSOP8-A-Reel No. FM008-A-R-SD-1.0 QTY. ANGLE UNIT mm ABLIC Inc. 4,000 2.00.1 8 5 (1.70) 1 4 +0.05 0.08 -0.02 0.5 0.230.1 The heat sink of back side has different electric potential depending on the product. Confirm specifications of each product. Do not use it as the function of electrode. No. PP008-A-P-SD-2.0 TITLE HSNT-8-A-PKG Dimensions No. PP008-A-P-SD-2.0 ANGLE UNIT mm ABLIC Inc. +0.1 o1.5 -0 2.00.05 4.00.1 0.250.05 +0.1 o1.0 -0 0.600.05 4.00.1 2.30.05 4 321 5 6 78 Feed direction No. PP008-A-C-SD-1.0 TITLE HSNT-8-A-Carrier Tape No. PP008-A-C-SD-1.0 ANGLE UNIT mm ABLIC Inc. +1.0 9.0 - 0.0 11.41.0 Enlarged drawing in the central part o130.2 (60) (60) No. PP008-A-R-SD-1.0 HSNT-8-A-Reel TITLE No. PP008-A-R-SD-1.0 ANGLE QTY. UNIT mm ABLIC Inc. 5,000 1.6 0.30 0.50 No. PP008-A-L-SD-1.0 TITLE No. HSNT-8-A -Land Recommendation PP008-A-L-SD-1.0 ANGLE UNIT mm ABLIC Inc. Disclaimers (Handling Precautions) 1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and application circuit examples, etc.) is current as of publishing date of this document and is subject to change without notice. 2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of any specific mass-production design. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by the reasons other than the products described herein (hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use of the information described herein. 3. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by the incorrect information described herein. 4. Be careful to use the products within their ranges described herein. Pay special attention for use to the absolute maximum ratings, operation voltage range and electrical characteristics, etc. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by failures and / or accidents, etc. due to the use of the products outside their specified ranges. 5. Before using the products, confirm their applications, and the laws and regulations of the region or country where they are used and verify suitability, safety and other factors for the intended use. 6. When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related laws, and follow the required procedures. 7. The products are strictly prohibited from using, providing or exporting for the purposes of the development of weapons of mass destruction or military use. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by any provision or export to the person or entity who intends to develop, manufacture, use or store nuclear, biological or chemical weapons or missiles, or use any other military purposes. 8. The products are not designed to be used as part of any device or equipment that may affect the human body, human life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment, aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses by ABLIC, Inc. Do not apply the products to the above listed devices and equipments. ABLIC Inc. is not liable for any losses, damages, claims or demands caused by unauthorized or unspecified use of the products. 9. In general, semiconductor products may fail or malfunction with some probability. The user of the products should therefore take responsibility to give thorough consideration to safety design including redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or death, fires and social damage, etc. that may ensue from the products' failure or malfunction. The entire system in which the products are used must be sufficiently evaluated and judged whether the products are allowed to apply for the system on customer's own responsibility. 10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the product design by the customer depending on the intended use. 11. The products do not affect human health under normal use. However, they contain chemical substances and heavy metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be careful when handling these with the bare hands to prevent injuries, etc. 12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used. 13. The information described herein contains copyright information and know-how of ABLIC Inc. The information described herein does not convey any license under any intellectual property rights or any other rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any part of this document described herein for the purpose of disclosing it to a third-party is strictly prohibited without the express permission of ABLIC Inc. 14. For more details on the information described herein or any other questions, please contact ABLIC Inc.'s sales representative. 15. This Disclaimers have been delivered in a text using the Japanese language, which text, despite any translations into the English language and the Chinese language, shall be controlling. 2.4-2019.07 www.ablic.com