S-19400/19401 Series www.ablicinc.com AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 (c) ABLIC Inc., 2014-2018 The S-19400/19401 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. Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in the purpose, contact to ABLIC Inc. is indispensable. Features * Detection voltage: * Detection voltage accuracy: * Input voltage: * Hysteresis width: * Current consumption: * Reset time-out period: * Watchdog operation is switchable: * Watchdog operation voltage range: * Watchdog mode switching function*1: * Watchdog input edge is selectable: * Product type is selectable: * Operation temperature range: * Lead-free (Sn 100%), halogen-free * AEC-Q100 qualified*2 *1. *2. 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) Enable, Disable 2.5 V to 6.0 V Time-out mode, window mode Rising edge, falling edge, both rising and falling edges S-19400 Series ___ ________ (Product with W / T pin (Output: WDO pin)) S-19401 Series ___ _______ ________ (Product without W / T pin (Output: RST pin, WDO pin)) Ta = -40C to +125C The S-19401 Series is fixed to the window mode. Contact our sales office for details. Applications * Automotive (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 Rev.2.3_00 S-19400/19401 Series Block Diagrams 1. ____ S-19400 Series (Product with W / T pin) CWDT VDD WEN Noise filter WDI Noise filter W/T Noise filter WDT circuit *1 WDO Voltage detection circuit Reference voltage circuit VSS CPOR *1. Only the product with an output pull-up resistor Figure 1 2. ____ S-19401 Series (Product without W / T pin) CWDT VDD *1 WEN Noise filter WDI Noise filter *1 WDT circuit RST WDO Voltage detection circuit VSS Reference voltage circuit CPOR *1. Only the product with an output pull-up resistor Figure 2 2 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series AEC-Q100 Qualified This IC supports AEC-Q100 for the operation temperature grade 1. Contact our sales office for details of AEC-Q100 reliability specification. Product Name Structure Users can select the product type, detection voltage, and package type for the S-19400/19401 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-1940 x 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 1*2 A to L Product type 2*3 0, 1 *1. *2. *3. Refer to the tape drawing. Refer to "2. Product type list". ___ 0: S-19400 Series (Product with W / T pin) ________ The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection circuit. ___ 1: S-19401 Series (Product without W / T pin) ________ The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection circuit. _______ The RST pin outputs the signal which is from the voltage detection circuit. The watchdog mode is fixed to the window mode. 3 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 2. Product type list Product Type A B C D E F G H I J K L 3. WEN Pin Logic Active "H" Active "H" Active "H" Active "L" Active "L" Active "L" Active "H" Active "H" Active "H" Active "L" Active "L" Active "L" Table 1 Input Edge Rising edge Falling edge Both rising and falling edges Rising edge Falling edge Both rising and falling edges Rising edge Falling edge Both rising and falling edges Rising edge Falling edge Both rising and falling edges Packages Table 2 Package Name TMSOP-8 HSNT-8(2030) 4 Output Pull-up Resistor Available Available Available Available Available Available Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable Package Drawing Codes Dimension Tape Reel Land FM008-A-P-SD PP008-A-P-SD FM008-A-C-SD PP008-A-C-SD FM008-A-R-SD PP008-A-R-SD - PP008-A-L-SD AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Pin Configurations 1. TMSOP-8 Table 3 Top view 1 2 3 4 Pin No. 8 7 6 5 Figure 3 1 2 3 4 5 6 7 8 Table 4 Pin No. 1 2 3 4 5 6 7 8 ___ S-19400 Series (Product with W / T pin) Symbol W / T*1 CPOR CWDT VSS WEN ________ WDO WDI VDD ___ Description Watchdog mode switching pin Reset time-out period adjustment pin Watchdog time adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin ___ S-19401 Series (Product without W / T pin) Symbol RST CPOR CWDT VSS WEN ________ WDO WDI VDD _______ Description Reset output pin Reset time-out period adjustment pin Watchdog time adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin ___ *1. W / T pin = "H": Time-out mode ___ W / T pin = "L": Window mode 5 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 2. HSNT-8(2030) Table 5 Top view Pin No. 1 8 4 5 Bottom view 8 1 5 4 1 2 3 4 5 6 7 8 ___ S-19400 Series (Product with W / T pin) Symbol W / T*2 CPOR CWDT VSS WEN ________ WDO WDI VDD ___ Description Watchdog mode switching pin Reset time-out period adjustment pin Watchdog time adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin *1 Figure 4 Table 6 Pin No. 1 2 3 4 5 6 7 8 ___ S-19401 Series (Product without W / T pin) Symbol RST CPOR CWDT VSS WEN ________ WDO WDI VDD _______ Description Reset output pin Reset time-out period adjustment pin Watchdog time adjustment pin GND pin Watchdog enable pin Watchdog output pin Watchdog input pin Voltage input pin *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. ___ / T pin = "H": Time-out mode *2. W ___ W / T pin = "L": Window mode 6 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Pin Functions Refer to " Operation" for details. 1. ____ W / T pin (S-19400 Series only) This is a pin to switch the watchdog mode. ___ The S-19400 Series changes to the time-out mode when the W / T pin is "H", and changes to the window mode ___ when the W / T pin is "L". Switching the mode is prohibited during the operation. ___ The constant current source (0.3 A typ.) is connected to the W / T pin, and it is pulled down internally. 1. 1 ___ Time-out mode (W / T pin = "H") The S-19400 Series detects an abnormality when not inputting an edge to the WDI pin during the watchdog ________ time-out period (tWDU). And then "L" is output from the WDO pin. W/T (S-19400 only) "H" tWDU tRST WDI (Rising edge) WDO Figure 5 1. 2 Abnormality Detection in Time-out Mode ___ Window mode (W / T pin = "L") When not inputting an edge to the WDI pin during tWDU, or when an edge is input to the WDI pin again within a specific period of time (the discharge________ time due to an edge detection + 1 charge-discharge time (tWDL)) after inputting an edge to the WDI pin, the WDO pin output changes from "H" to "L". W/T (S-19400 only) "L" WDI (Rising edge) WDO tWDL Figure 6 2. tRST tWDU tRST Abnormality Detection in Window Mode ________ RST pin (S-19401 Series only) This is a reset output pin. It outputs "L" when_______ detecting a low voltage. Be sure to connect a pull-up resistor to the RST pin in the product without an output pull-up resistor. 3. CPOR pin This is a pin to connect an external capacitor in order to generate the reset time-out period (tRST). The capacitor is charged and discharged by an internal constant current circuit, and the charge-discharge duration is tRST. tRST is calculated by using the following equation. tRST = 6,500,000 x CPOR [F] + 0.0002 7 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 4. CWDT pin This is a pin to connect an external capacitor in order to generate the watchdog time-out period (tWDU) and the watchdog double pulse detection time (tWDL). The capacitor is charged and discharged by an internal constant current circuit. tWDU is calculated by using the following equation. tWDU = 50,000,000 x CWDT [F] + 0.0011 Moreover, tWDL is calculated by using the following equation. tWDU tWDL = 32 5. WEN pin This is a pin to switch Enable / Disable of the watchdog timer. When the WEN pin logic is active "H", the watchdog timer becomes Enable if the input is "H", and the charge-discharge operation is performed at the CWDT pin. In the active "H" product, the constant current source (0.3 A typ.) is connected to the WEN pin, and it is pulled down internally. 6. _________ WDO pin This pin combines the reset output and the watchdog output. ________ Be sure to connect a pull-up resistor to the WDO pin in the product without an output pull-up resistor. 7. 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 constant current source (0.3 A typ.) is connected to the WDI pin, and it is pulled down internally. 8 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Absolute Maximum Ratings Table 7 (Ta = -40C to +125C unless otherwise specified) Absolute Maximum Rating Unit VDD pin voltage VDD V VSS - 0.3 to VSS + 7.0 WDI pin voltage VWDI V VSS - 0.3 to VDD + 0.3 VSS + 7.0 WEN pin voltage V - 0.3 to V + 0.3 V + 7.0 V V WEN SS DD SS ___ Vw / T W / T pin voltage V VSS - 0.3 to VDD + 0.3 VSS + 7.0 CPOR pin voltage VCPOR V VSS - 0.3 to VDD + 0.3 VSS + 7.0 CWDT pin voltage VCWDT V VSS - 0.3 to VDD + 0.3 VSS + 7.0 _______ A / B / C / D / E / F type V VSS - 0.3 to VDD + 0.3 VSS + 7.0 RST pin voltage V RST G / H / I / J / K / L type V VSS - 0.3 to VSS + 7.0 ________ A / B / C / D / E / F type VSS - 0.3 to VDD + 0.3 VSS + 7.0 V VWDO WDO pin voltage G / H / I / J / K / L type V VSS - 0.3 to VSS + 7.0 Operation ambient temperature Topr -40 to +125 C Storage temperature Tstg -40 to +150 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. Item Symbol ___ _______ ________ Thermal Resistance Value Table 8 Item Symbol Condition Min. 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 TMSOP-8 Junction-to-ambient thermal resistance*1 JA HSNT-8(2030) *1. Remark Refer to " Power Dissipation" and "Test Board" for details. 9 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Electrical Characteristics Table 9 (1 / 2) Item Detection voltage*1 Hysteresis width (WEN pin logic active "H" product, VDD = 5.0 V, Ta = -40C to +125C unless otherwise specified) Test Symbol Condition Min. Typ. Max. Unit Circuit -VDET(S) -VDET(S) -VDET(S) V - -VDET 1 x 0.98 x 1.02 -VDET -VDET -VDET V VHYS - 1 x 0.03 x 0.05 x 0.07 Current consumption during operation Reset time-out period ISS1 When watchdog timer operates - 3.8 9.0 A 2 tRST CPOR = 2200 pF 8.7 14.5 20 ms 3 Watchdog time-out period Watchdog double pulse detection time tWDU CWDT = 470 pF 15 24.6 34 ms 3 tWDL CWDT = 470 pF 461 769 1077 s 4 Reset output voltage "H" VROH VDD - 1.0 - - V 5 Reset output voltage "L" VROL - - 0.4 V 6 - -0.85 -0.4 A 7 0.48 1.1 - mA 8 0.8 1.6 - mA 8 1.0 2.6 - mA 8 1.4 3.3 - mA 8 - - 0.096 A 9 S-19401 Series A / B / C / D / E / F type only S-19401 Series only V RST = 0 V, S-19401 Series A / B / C / D / E / F type only VDD = 1.5 V VDS = 0.4 V, VDD = 1.8 V S-19401 Series VDD = 2.5 V only VDD = 3.0 V VDS = 6.0 V, VDD = 6.0 V, S-19401 Series only A / B / C / D / E / F type only _______ Reset output pull-up current Reset output current IRUP IROUT Reset output leakage current IRLEAK Watchdog output voltage "H" VWOH Watchdog output voltage "L" Watchdog output pull-up current Watchdog output current - VWOL VDD - 1.0 - - V 10 - - 0.4 V 11 VWDO = 0 V, A / B / C / D / E / F type only VDD = 1.5 V - -0.85 -0.4 A 12 0.48 1.1 - mA 13 VDD = 1.8 V 0.8 1.6 - mA 13 VDD = 2.5 V 1.0 2.6 - mA 13 VDD = 3.0 V 1.4 3.3 - mA 13 - - 0.096 A 14 ________ IWUP IWOUT VDS = 0.4 V Watchdog output leakage current Input pin voltage 1 "H" VSH1 WEN pin 0.7 x VDD - - V 15 Input pin voltage 1 "L" VSL1 - 0.3 x VDD V 15 Input pin voltage 2 "H" VSH2 - - V 15 Input pin voltage 2 "L" VSL2 WEN pin - ___ W / T pin, S-19400 Series only 0.7 x VDD ___ W / T pin, S-19400 Series only - - 0.3 x VDD V 15 Input pin voltage 3 "H" VSH3 WDI pin 0.7 x VDD - - V 15 Input pin voltage 3 "L" VSL3 WDI pin - - 0.3 x VDD V 15 10 IWLEAK VDS = 6.0 V, VDD = 6.0 V AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Table 9 (2 / 2) (WEN pin logic active "H" product, VDD = 5.0 V, Ta = -40C to +125C unless otherwise specified) Test Symbol Condition Min. Typ. Max. Unit Circuit Item Input pin current 1 "H" ISH1 Input pin current 1 "L" ISL1 Input pin current 2 "H" ISH2 Input pin current 2 "L" ISL2 Input pin current 3 "H" ISH3 Input pin current 3 "L" ISL3 - 0.3 1.0 A 15 -0.1 - 0.1 A 15 -0.1 - 0.1 A 15 - 0.3 1.0 A 15 -0.1 - 0.1 A 15 - 0.3 1.0 A 15 -0.1 - 0.1 A 15 *2 thigh1 - 1.5 - - s 15 *2 tlow1 - 1.5 - - s 15 tWOUT - - 25 40 s 3 Input pulse width "H" Input pulse width "L" A/B/C /G/H/I WEN pin, type VDD = 6.0 V, D/E/F Input pin voltage = 6.0 V /J/K/L type WEN pin, VDD = 6.0 V, Input pin voltage = 0 V ___ W / T pin, S-19400 Series only, VDD = 6.0 V, Input pin voltage = 6.0 V ___ W / T pin, S-19400 Series only, 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 Watchdog output delay time Reset output delay time tROUT - - 25 40 s 3 Input setup time tiset - 1.0 - - s 3 *1. *2. -VDET: Actual detection voltage, -VDET(S): Set detection voltage The input pulse width "H" (thigh1) and the input pulse width "L" (tlow1) are defined as shown in Figure 7. Inputs to the WEN pin and the WDI pin should be greater than or equal to the min. value specified in " Electrical Characteristics". thigh1 VSH1 VSH1 WEN VSL1 VSL1 tlow1 thigh1 VSH3 WDI VSH3 VSL3 VSL3 tlow1 Figure 7 11 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Test Circuits + VDD CPOR CWDT WEN + VDD CPOR WDO WDO CWDT WDI V A *1 V + W/T WDI WEN W/T VSS VSS *1. Only the product without an output pull-up resistor Figure 8 Test Circuit 1 Figure 9 VDD VDD *1 CPOR CWDT Test Circuit 2 WDO WEN WDO CWDT WDI V + W/T WDI WEN V + W/T VSS VSS *1. Only the product without an output pull-up resistor Figure 10 *1 CPOR Test Circuit 3 *1. Only the product without an output pull-up resistor Figure 11 Test Circuit 4 VDD VDD CWDT *1, *2 CPOR CPOR WDO CWDT WDI WDO WDI WEN RST VSS WEN V + RST VSS V + *1. Only the product without an output pull-up resistor *2. 100 k or more is recommended. Figure 12 12 Test Circuit 5 Figure 13 Test Circuit 6 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series VDD VDD CPOR CPOR WDO CWDT WDI WDI WEN WEN RST A VSS Figure 14 WDO CWDT + RST + VSS Test Circuit 7 Figure 15 Test Circuit 8 VDD VDD CPOR CPOR CWDT WDO CWDT WDO WDI WDI WEN RST A + WEN V W/T Test Circuit 9 Figure 17 VDD Test Circuit 10 VDD *1, *2 CPOR CWDT + VSS VSS Figure 16 A CPOR WDO CWDT WDI WEN V + W/T WDO WDI WEN A W/T + VSS VSS *1. Only the product without an output pull-up resistor *2. 100 k or more is recommended. Figure 18 Test Circuit 11 Figure 19 Test Circuit 12 13 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series VDD VDD CPOR CWDT WDO A CPOR + CWDT WDI WDI WEN WEN W/T W/T VSS Figure 20 VSS Test Circuit 13 Figure 21 VDD *1 CPOR CWDT + A WDO WEN, WDI, W / T V + VSS *1. Only the product without an output pull-up resistor Figure 22 14 WDO Test Circuit 15 Test Circuit 14 A + AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Operation From power-on to reset release The S-19400/19401 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. VDD +VDET VCPU CPOR VCPL WDO Output "L" "H" RST tINIT (S-19401 only) Output "L" "H" tRST Remark VCPU: CPOR charge upper limit threshold (1.25 V typ.) VCPL: CPOR charge lower limit threshold (0.20 V typ.) Figure 23 tINIT changes according to the power supply rising time. Refer to Figure 24 for the relation between tINIT and the power supply rising time. Ta = +25C 0.1 Initialization time [s] 1. -VDET = 3.3 V 0.01 -VDET = 2.0 V 0.001 0.0001 -VDET = 5.0 V 0.00001 0.000001 0.00001 0.0001 0.001 0.01 0.1 Power supply rising time [s] Figure 24 Power Supply Rising Time Dependency of Initialization Time Power supply rising time 6.0 V VDD = WEN 1.8 V CPOR +VDET VCPL Initialization time*1 *1. The initialization time is the time period from when the VDD pin voltage reaches +VDET to when CPOR rises. Figure 25 Initialization Time 15 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 2. 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 When WEN pin is "H" at reset release (Active "H") Since the watchdog timer is Enable, the S-19400/19401 Series initiates the charge-discharge operation to the CWDT pin. VDD CPOR CWDT WEN (Active "H") WDO RST (S-19401 only) Figure 26 2. 2 WEN Pin = "H" When WEN pin is "L" at reset release (Active "H") Since the watchdog timer is Disable after the CPOR pin performs the charge-discharge operation 4 times, the S-19400/19401 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-19400/19401 Series initiates the charge-discharge operation to the CWDT pin. VDD CPOR CWDT WEN Charge-discharge operation is initiated at WEN pin = "H" (Active "H") WDO RST (S-19401 only) Figure 27 16 WEN Pin = "L" "H" AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 3. 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". VDD 1 2 3 4 CPOR 1 1 2 3 4 5 2 3 4 29 30 31 32 1 2 3 CWDT WDI "L" WEN (Active "H") WDO RST tWDU (S-19401 only) tRST Figure 28 4. Internal counter reset due to edge detection 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. 4. 1 Counter reset due to rising edge detection (S-1940xAxxA, S-1940xDxxA, S-1940xGxxA, S-1940xJxxA) VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 3 4 30 31 32 1 CWDT WDI Counter reset due to rising edge detection Time-out after counter reset WEN (Active "H") WDO RST (S-19401 only) Figure 29 17 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 4. 2 Counter reset due to falling edge detection (S-1940xBxxA, S-1940xExxA, S-1940xHxxA, S-1940xKxxA) VDD 1 2 3 1 4 2 3 4 CPOR 1 2 4 3 1 2 3 4 30 31 32 1 CWDT WDI Counter reset due to falling edge detection Time-out after counter reset WEN (Active "H") WDO RST (S-19401 only) Figure 30 4. 3 Counter reset due to both rising and falling edges detection 1 (S-1940xCxxA, S-1940xFxxA, S-1940xIxxA, S-1940xLxxA) VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 1 2 30 31 32 1 CWDT Counter reset due to WDI both rising and falling edges detection Time-out after counter reset WEN (Active "H") WDO RST (S-19401 only) Figure 31 18 2 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 4. 4 Counter reset due to both rising and falling edges detection 2 (S-1940xCxxA, S-1940xFxxA, S-1940xIxxA, S-1940xLxxA) VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 1 2 30 31 32 1 2 CWDT Counter reset due to WDI both rising and falling edges detection Time-out after counter reset WEN (Active "H") WDO RST (S-19401 only) Figure 32 5. WEN pin operation during 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. Moreover, 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. VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 31 32 1 2 CWDT Watchdog timer restarts the operation at WEN pin = "H" WEN (Active "H") Charge-discharge operation is stopped, counter reset WDO RST (S-19401 only) Figure 33 19 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 6. Watchdog double pulse detection If an edge is input to the WDI pin again within a specific period of time (the discharge time due to an edge detection + 1 charge-discharge time (tWDL)) after inputting an edge to the WDI pin when the S-19400/19401 Series is the window ________ mode, the WDO pin output changes from "H" to "L". When the watchdog timer________ becomes Disable due to a change of the WEN pin ("H" "L" "H") after inputting an edge to the WDI pin, the WDO pin continues outputting "H" even if an edge is input to the WDI pin within the specific period of time mentioned above. 6. 1 Double pulse detection due to rising edge detection (S-1940xAxxA, S-1940xDxxA, S-1940xGxxA, S-1940xJxxA) tWDL VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 CWDT WDI W / T "L" (S-19400 only) WEN (Active "H") WDO RST (S-19401 only) Figure 34 6. 2 Double pulse detection due to falling edge detection (S-1940xBxxA, S-1940xExxA, S-1940xHxxA, S-1940xKxxA) VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 CWDT Counter reset at the 1st edge WDI Output "H" "L" at the 2nd edge W / T "L" (S-19400 only) WEN (Active "H") WDO RST (S-19401 only) Figure 35 20 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 6. 3 Double pulse detection due to both rising and falling edges detection (S-1940xCxxA, S-1940xFxxA, S-1940xIxxA, S-1940xLxxA) The double pulse is detected only when edges are input in order of rising and falling. 6. 3. 1 When edges are input to WDI pin in order of rising and falling VDD 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 1 2 3 CWDT Counter reset at the1st edge Output "H" "L" at the 2nd edge WDI W / T "L" (S-19400 only) WEN (Active "H") WDO RST (S-19401 only) Figure 36 6. 3. 2 Double Pulse Detection When edges are input to WDI pin in order of falling and rising VDD 1 2 3 4 4 CPOR 1 2 3 4 1 2 3 4 29 30 31 32 CWDT Counter reset at the 1st edge Only counter reset at the 2nd edge WDI W / T "L" (S-19400 only) WEN (Active "H") WDO RST (S-19401 only) Figure 37 Double Pulse Non-detection 21 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 7. 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 (Only the S-19401 Series). The output is maintained until the charge-discharge operation of the CPOR pin is performed 4 times. The S-19400/19401 Series can detect a low voltage even if either the ___ CPOR pin or the WDT pin performs the charge-discharge operation. In this case, the status of the WEN pin or the W / T pin does not have an affect. VDD 1 2 1 2 3 4 1 2 3 4 CPOR 1 2 3 4 CWDT WDI "H" or "L" W/T "H" or "L" (S-19400 only) WEN "H" or "L"*1 (Active "H") WDO RST (S-19401 only) Figure 38 *1. When the WEN pin is Disable, the charge-discharge operation of CWDT pin is not performed. 8. ____ WEN pin, WDI pin and W / T pin ___ Each of the WEN pin, the WDI pin and the W / T pin has a noise filter. If the power supply voltage is 5.0 V, noise with a minimum pulse width of 200 ns can be eliminated. 22 1 2 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Standard Circuits 1. ____ S-19400 Series (Product with W / T pin) VDD VDD RextW*1 WEN WDI WDO W/T VSS CPOR CWDT CPOR*2 *1. *2. *3. CWDT*3 ________ RextW is an external pull-up resistor for the WDO pin, which is unnecessary for the product with output pull-up resistor. Adjustment capacitor for reset output delay time (CPOR) should be connected directly to the CPOR pin and the VSS pin. Adjustment capacitor for watchdog output delay time (CWDT) should be connected directly to the CWDT pin and the VSS pin. A capacitor of 100 pF to 1 F can be used for CPOR and CWDT. Figure 39 2. ____ S-19401 Series (Product without W / T pin) RextW*1 VDD VDD WDO WEN RextR*2 WDI RST VSS CPOR CPOR*3 *1. *2. *3. *4. CWDT CWDT*4 ________ RextW is an external pull-up resistor for the WDO pin, which is unnecessary for the product with output pull-up resistor. _______ RextR is an external pull-up resistor for the RST pin, which is unnecessary for the product with output pull-up resistor. Adjustment capacitor for reset output delay time (CPOR) should be connected directly to the CPOR pin and the VSS pin. Adjustment capacitor for watchdog output delay time (CWDT) should be connected directly to the CWDT pin and the VSS pin. A capacitor of 100 pF to 1 F can be used for CPOR and CWDT. Figure 40 Caution The above connection diagrams and constants will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constants. 23 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Precautions * It will take time for the discharge operation to be performed if the capacitance of CPOR is extremely large at the low voltage detection, so the discharge operation may not be completed by the time the power supply voltage exceeds the detection voltage. In that case, since the charge-discharge operation of the CPOR pin is performed after the discharge operation is completed, the delay time of the same time length as the discharge operation occurs in reset time-out period (tRST). * Select a capacitor which satisfies the following equation for CPOR and CWDT. If this condition is not satisfied, the delay time of the same time length as the discharge operation occurs in tRST since the discharge operation of an external capacitor connected to the CWDT pin is not completed by the time the CWDT pin initiates the next charge-discharge operation. CWDT / CPOR 600 * When the power supply voltage falls to 0.9 V or lower, set a time interval of 20 s or longer by the time the power supply is raised again. If the appropriate time length is not secured, the time-out period after raising the power supply voltage may get delayed. * When the time that the power supply voltage falls below the detection voltage is short, the S-19400/19401 Series may not detect a voltage. In that case, the time-out period after raising the power supply voltage may get delayed. ___ * Since input pins (the WEN pin, the WDI pin and the W / T pin) in the S-19400/19401 Series are CMOS configurations, make sure that an intermediate potential is not input when the S-19400/19401 Series operates. ________ _______ * Since the WDO pin and the RST pin are affected by external resistance and external capacitance, use the S-19400/19401 Series after performing thorough evaluation with the actual application. 24 * 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. AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series Characteristics (Typical Data) 1. Current consumption during operation (ISS1) vs. Input voltage (VDD) 5.0 WDT = OFF, -VDET(S) = 4.0 V, Ta = +25C 5.0 Ta = +125C 4.5 ISS1 [A] ISS1 [A] 4.0 WDT = ON, -VDET(S) = 4.0 V, WDI input 3.0 2.0 1.0 Ta = 40C 4.0 Ta = +25C 3.5 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 2. Current consumption during operation (ISS1) vs. Temperature (Ta) 3. Detection voltage (-VDET), Release voltage (+VDET) vs. 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 4.5 -VDET(S) = 4.0 V +VDET 4.0 VDET 3.5 3.0 40 25 0 25 50 Ta [C] 75 100 40 25 125 4. Reset time-out period (tRST) vs. Temperature (Ta) 0 30 30 0 40 25 25 50 Ta [C] 75 100 10 0 25 50 Ta [C] 75 100 125 75 100 125 30 20 10 0 40 25 25 50 Ta [C] VDD = 5.0 V, CWDT = 470 pF tWOUT [s] tROUT [s] 20 0 40 40 30 40 25 7. Watchdog output delay time (tWOUT) vs. Temperature (Ta) VDD = -VDET(S) + 1.0 V -VDET(S) - 1.0 V, CPOR = 2200 pF 0 10 125 6. Reset output delay time (tROUT) vs. Temperature (Ta) 125 20 0 0 100 VDD = 5.0 V, CWDT = 470 pF 40 tWDU [ms] tRST [ms] VDD = 5.0 V, CPOR = 2200 pF 10 75 5. Watchdog time-out period (tWDU) vs. Temperature (Ta) 40 20 25 50 Ta [C] 40 25 0 25 50 Ta [C] 75 100 125 25 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 8. Reset time-out period (tRST) vs. CPOR 9. VDD = 5.0 V, Ta = +25C 10 tWDU [s] tRST [s] 10 0.1 0.01 0.001 0.001 0.01 CPOR [F] 0.1 1 10. Nch driver output current (IWOUT) vs. Input voltage (VDD) VDS = 0.4 V, -VDET(S) = 4.0 V 6.0 Ta = +25C IWOUT [mA] 1 0.1 0.01 0.0001 0.0001 26 VDD = 5.0 V, Ta = +25C 100 1 4.0 Ta = 40C 2.0 Ta = +125C 0.0 Watchdog time-out period (tWDU) vs. CWDT 0 1 2 3 VDD [V] 4 5 0.001 0.0001 0.001 0.01 CWDT [F] 0.1 1 AUTOMOTIVE, 125C OPERATION, 3.8 A CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION Rev.2.3_00 S-19400/19401 Series 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] Board 50 75 100 125 150 175 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 27 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 No. PP008-A-P-SD-2.0 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. TITLE DFN-8/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 DFN-8/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 TITLE DFN-8/HSNT-8-A-Reel No. PP008-A-R-SD-1.0 QTY. ANGLE UNIT mm ABLIC Inc. 5,000 1.6 0.30 0.50 No. PP008-A-L-SD-1.0 TITLE No. DFN-8/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 responsible for damages 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 responsible for damages caused by the incorrect information described herein. 4. Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings, operation voltage range and electrical characteristics, etc. ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the products outside their specified ranges. 5. When 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 must not be used or provided (exported) for the purposes of the development of weapons of mass destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use. 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. Do not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc. Especially, the products cannot be used for life support devices, devices implanted in the human body and devices that directly affect human life, etc. Prior consultation with our sales office is required when considering the above uses. ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products. 9. 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 must be sufficiently evaluated and applied 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 without the express permission of ABLIC Inc. is strictly prohibited. 14. For more details on the information described herein, contact our sales office. 2.0-2018.01 www.ablicinc.com