Advanced Power Electronics Corp. APE6809_6812 3PIN MICROPROCESSOR RESET CIRCUIT FEATURES DESCRIPTION Precision Monitoring of +2.5,+3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Low Output(APE6809/APE6811) Push-Pull RESET High Output(APE6810/APE6812) 200ms (Typ.)min Power-On Reset Pulse Width 25A Supply Current Guaranteed Reset Valid to VCC = +1.0V Power Supply Transient Immunity No External Components Available in the 3-Pin Pb-Free SOT-23 and SC-70 Package Halogen-Free Product The APE6809_6812 are used for microprocessor (P) supervisory circuits to monitor the power supplies in P and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V, +2.5V powered circuits. These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 200ms after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The APE6809_6812 have push pull outputs. The APE6809/APE6811 have an active low RESET output, while the APE6810_6812 has an active high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 1.0V. Low supply current makes the APE6809_6812 ideal for use in portable equipment. The APE6809_6812 is available in a 3-pin SOT-23 and SC-70 package. TYPICAL APPLICATION VCC VCC VCC Microprocessor APE68XX RESET (RESET) RESET INPUT GND GND PACKAGE ORDERING INFORMATION APE68XX X - X - HF (Top View) (Top View) Halogen-Free Enable 09 : Active-Low 10 : Active-High 11 : Active-Low 12 : Active-High Package Voltage U : SC-70 N : SOT-23 A: 4.63 B: 4.38 C: 4.00 D: 3.08 E: 2.93 F: 2.63 G: 2.25 H: 2.70 I : 4.25 Data and specifications subject to change without notice GND RESET (RESET) 1 APE6809 APE6810 RESET (RESET) APE6811 APE6812 3 VCC GND 2 SOT-23/SC-70 1 3 VCC 2 SOT-23/SC-70 1 200905251 Advanced Power Electronics Corp. APE6809_6812 MARKING INFORMATION WW : 01~26(A~Z) 27~52(a~z) Year : 7 = 2007 A = 2010 Part number : Identification Code XXYW APPENDIX Part Number Identification Code Part Number Identification Code APE6809N-A CA APE6811N-A CO APE6809N-B CB APE6811N-B CP APE6809N-C CC APE6811N-C CQ APE6809N-D CD APE6811N-D CR APE6809N-E CE APE6811N-E CS APE6809N-F CF APE6811N-F CT APE6809N-G CG APE6811N-G CU APE6809N-H Ca APE6811N-H Cf APE6809N-I Cb APE6811N-I Cg APE6810N-A CH APE6812N-A C1 APE6810N-B CI APE6812N-B C2 APE6810N-C CJ APE6812N-C C3 APE6810N-D CK APE6812N-D C4 APE6810N-E CL APE6812N-E C5 APE6810N-F CM APE6812N-F C6 APE6810N-G CN APE6812N-G C7 APE6810N-H Cd APE6812N-H Ch APE6810N-I Ce APE6812N-I Cm APE6809U-A CA APE6811U-A CO APE6809U-B CB APE6811U-B CP APE6809U-C CC APE6811U-C CQ APE6809U-D CD APE6811U-D CR APE6809U-E CE APE6811U-E CS APE6809U-F CF APE6811U-F CT APE6809U-G CG APE6811U-G CU APE6809U-H Ca APE6811U-H Cf APE6809U-I Cb APE6811U-I Cg APE6810U-A CH APE6812U-A C1 APE6810U-B CI APE6812U-B C2 APE6810U-C CJ APE6812U-C C3 APE6810U-D CK APE6812U-D C4 APE6810U-E CL APE6812U-E C5 APE6810U-F CM APE6812U-F C6 APE6810U-G CN APE6812U-G C7 APE6810U-H Cd APE6812U-H Ch APE6810U-I Ce APE6812U-I Cm 2 Advanced Power Electronics Corp. APE6809_6812 ABSOLUTE MAXIMUM RATINGS (at TA=25C) VCC PIN Voltage (VCC) ----------------------------------- GND - 0.3V to GND + 6.5V RESET, RESET(Push-Pull) PIN Voltage (VRESET) -- GND - 0.3V to VCC + 0.3V Input Current, VCC (ICC) ----------------------------------- 20mA Output Current, RESET, RESET (IO) ------------------ 5mA Power Dissipation(PD) ------------------------------------- ( TJ-TA ) / Rthja Storage Temperature Range(TST) --------------------- -60C To 150C Operating Temperature Range(T OP) ------------------ -40C To 85C Junction Temperature(T J) -------------------------------- -40C To 150C Thermal Resistance from Junction to case(Rth JC) 110oC/W Thermal Resistance from Junction to Ambient(RthJA) 250oC/W Note. RthJA is measured with the PCB copper area of approximately 1 in2(Multi-layer). that need connect to VSS pin. ELECTRICAL SPECIFICATIONS (VDD=2.75V, TA=25, unless otherwise specified) Parameter Operating Vcc Range Supply Current Reset Threshold TA=25oC Reset Threshold Tempco SYM VRange ICC VTH VTHT TEST CONDITION VCC = VTH+1.0V MIN 1 TYP - MAX 6 UNITS A - 25 35 APE6809_6812A 4.54 4.63 4.71 APE6809_6812B 4.29 4.38 4.46 APE6809_6812I 4.16 4.25 4.33 APE6809_6812C 3.92 4 4.08 APE6809_6812D 3.02 3.08 3.15 APE6809_6812E 2.87 2.93 3 APE6809_6812H 2.64 2.7 2.75 APE6809_6812F 2.57 2.63 2.69 V V APE6809_6812G 2.2 2.25 2.3 TA = 0oC to +85oC - 50 - ppm/oC Set-up Time TS VCC = 0 to (VTH - 100mV) 1 - - s Vcc to Reset Delay TRD Vcc=VTH to (VTH-100mV) - 20 - s 160 200 260 ms - - 0.3 V 0.8VCC - - V - - 0.3 V 0.8 VCC - - V - 40 - mV Reset Active Timeout Period RESET Output Voltage TDELAY VOL o o TA = 0 C to +85 C 1.8V<VCC < VTH(min), ISINK = 1.2mA 1.2V < VCC < 1.8V, ISINK = 50uA (APE6809/APE6811) VOH VCC > VTH (max), ISOURCE = 500uA, RESET VOL VCC > VTH (max), ISINK = 1.2mA, Output Voltage (APE6810/APE6812) Hysteresis at VCC VOH VHys 1.8V < VCC < VTH (min), ISOURCE = 500uA 1.2V < VCC < 1.8V, ISOURCE = 150uA Input voltage 3 Advanced Power Electronics Corp. APE6809_6812 PIN DESCRIPTIONS PIN SYMBOL VCC PIN DESCRIPTION Operating voltage input GND Ground Reset output pin RESET/(RESET) L: for APE6809/APE6811 H: for APE6810/APE6812 BLOCK DIAGRAM VCC P-MOS + VREF Delay Circuit RESET / RESET N-MOS GND FUNCTION DESCRIPTION A microprocessor's (P's) reset input starts the P in a known state. The APE6809_6812 asserts reset to prevent code-execution errors during power-up, power-down, or brownout conditions. They assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for at least 200ms after VCC has risen above the reset threshold. The APE6809_6812 has a push-pull output stage. APPLICATION INFORMATION Negative-Going VCC Transients In addition to issuing a reset to the P during power-up, power-down, and brownout conditions, the APE6809_6812 is relatively immune to short-duration negative-going VCC transients (glitches). The APE6809_6812 does not generate a reset pulse. The graph was generated using a negative going pulse applied to VCC, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset comparator overdrive). The graph indicates the maximum pulse width a negative going VCC transient can have without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a VCC transient that goes 50mV below the reset threshold A 0.1 F bypass capacitor mounted as close as possible to the VCC pin provides additional transient immunity. 4 Advanced Power Electronics Corp. APE6809_6812 APPLICATION INFORMATION Ensuring a Valid Reset Output Down to VCC = 0 RESET is guaranteed to be a logic low for VCC > 1.0V. Once VCC exceeds the reset threshold, an internal timer keeps RESET low for the reset timeout period; after this interval, RESET goes high. If a brownout condition occurs (VCC dips below the reset threshold), RESET goes low. Any time VCC goes below the reset threshold, the internal timer resets to zero, and RESET goes low. The internal timer starts after VCC returns above the reset threshold, and RESET remains low for the reset timeout period. When VCC falls below 1.0V, the APE6809/APE6811 RESET output no longer sinks current--it becomes an open circuit. Therefore, high-impedance CMOS logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applications since most P and other circuitry is inoperative with VCC below 1.0V. However, in applications where RESET must be valid down to 0V, adding a pull down resistor to causes any stray leakage currents to flow to ground, holding RESET low. R1's value is not critical; 100k is large enough not to load RESET and small enough to pull RESET to ground. For the APE6810/APE6812 if RESET is required to remain valid for VCC < 1.0V. Ensuring a Valid Reset Output Down to VCC = 0 Most P supervisor ICs has reset threshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply 5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. 5 Advanced Power Electronics Corp. APE6809_6812 TYPICAL PERFORMANCE CHARACTERISTICS Temperature Vs Threshold Voltage Temperature Vs Reset Active Timeout Period Reset Active Timeout Period (ms) Threshold Voltage (V) 2.96 2.95 2.94 2.93 2.92 2.91 VTH=2.93V 2.9 -50 -25 0 25 50 75 250 240 230 220 210 200 190 180 170 160 150 100 -50 -25 0 Temperature () 34 34 32 32 Supply Current (uA) Reset AcSupply Current (uA) 50 75 100 Threshold Voltage Vs Supply Current Temperature Vs Supply Current 30 28 26 24 22 30 28 26 24 22 VTH=2.93V 20 VCC=VTH+1V 20 -50 -25 0 25 50 75 100 2.25 2.63 Temperature () 2.93 3.08 4 4.38 4.63 Threshold Voltage (V) Temperature Vs Power-Down Reset Delay Temperature Vs Power-Down Reset Delay 50 45 VTH=2.25V 40 VOD=VTH-VCC Power-Down Reset Delay (uS) 50 Power-Down Reset Delay (uS) 25 Temperature () 35 30 25 VOD=50mV VOD=100mV 20 15 10 VOD=200mV 5 0 VTH=2.93V 45 VOD=VTH-VCC 40 35 VOD=50mV 30 25 20 15 VOD=200mV VOD=100mV 10 5 0 -50 -25 0 25 50 Temperature () 75 100 -50 -25 0 25 50 75 100 Temperature () 6 Advanced Power Electronics Corp. APE6809_6812 TYPICAL PERFORMANCE CHARACTERISTICS Temperature Vs Power-Down Reset Delay Power-Down Reset Delay (uS) 100 90 VTH=4.63V 80 VOD=VTH-VCC 70 VOD=100mV 60 VOD=50mV 50 40 30 20 VOD=200mV 10 0 -50 -25 0 25 50 75 100 Temperature () TIMING DIAGRAM Giltch Immunity Maximum Transient Duration(us) 3500 3000 2500 3000 2000 1500 1000 500 900 270 0 0 100 200 140 300 90 400 70 500 58 600 50 700 50 800 48 48 900 1000 1100 RESET COMPARATOR OVERDRIVE(mV) 7 Advanced Power Electronics Corp. APE6809_6812 PACKAGE OUTLINE (1) Package Type: SOT-23 HE E C D GAUGE PLANE L L1 e1 VIEW C e A SEE VIEW C A1 A2 1(4x) 2(4x) b(3x) Symbol A A1 A2 b C D E HE L L1 e e1 1 2 Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 1.90 0.95 5o 5o 8o A A1 A2 b C D E HE L L1 e e1 1 2 Dimensions In Inches Min. 1.05 0.05 1.00 0.25 0.08 2.70 1.50 2.60 0.30 0.50 1.80 0.85 0o 3o 6o Nom. 1.10 2.90 1.60 2.80 0.60 1.90 0.95 5o 5o 8o A A1 A2 b C D E HE L L1 e e1 1 2 Advanced Power Electronics Corp. APE6809_6812 (2) Package Type: SC-70 D A1 A HE E b e Symbol A A1 D HE E b e Dimensions In Millimeters Min. 0.80 0.02 1.80 1.80 1.15 0.20 Nom. 0.95 0.06 2.00 2.20 1.25 0.30 0.65 Bsc. Max. 1.10 0.10 2.20 2.40 1.35 0.40 Dimensions In Inches Min. 0.032 0.001 0.070 0.070 0.045 0.008 Nom. 0.039 0.0025 0.079 0.087 0.049 0.012 0.026 Bsc. Max. 0.043 0.004 0.087 0.094 0.053 0.016