MM1035 MITSUMI | Alldatasheet
Document overview
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Technical content
Features
- Built-in watchdog timer 2. Low minimum operating voltage V CC=0.8V typ. 3. Both positive and negative logic reset output can be extracted 4. Accurate detection of drop in power supply voltage 5. Detection voltage has hysteresis 6. Few external parts 1 capacitor Package DIP-8A (MM1035XD) SOP-8A (MM1035XF)
Applications
Absolute Maximum Ratings (Ta=25° C) Item Symbol Rating Units Storage temperature TSTG -40~+125 ° C Operating temperature TOPR -20~+70 ° C Power supply voltage VCC max. -0.3~+10 V Voltage applied to VS & CK pins VVS & VCK -0.3~+10 V Voltage applied to RESET, RESET pin VOH -0.3~+10 V Allowable loss Pd 400 mW
MITSUMI System Reset (with built-in watchdog timer) MM1035 Electrical Characteristics 1 (DC) (Except where noted otherwise, Ta=25°C, V CC=5V, measurement circuit 1) Item Symbol Measurement Measurement conditions Min. Typ. Max. Units circuit Consumption current ICC 1 During watchdog timer operation 0.7 1.0 mA Detection voltage VSL 1 4.05 4.20 4.35 V VSH 1 4.15 4.30 4.45 Detection voltage temperature coefficient Hysteresis voltage VHYS 1 50 100 150 mV CK input threshold VTH 1 0.8 1.2 2 V CK input current IIH 1V CK=5V 0 1 µA IIL 1V CK=0V -20 -10 -3 Output voltage (High) VOH11 I = -5µA, VS=OPEN 4.5 4.8 V VOH21 I RESET=-5µA, VS=0V 4.5 4.8 VOL1 1 I =3mA, V S=0V 0.2 0.4 Output voltage (Low) VOL2 1 I =10mA, V S=0V 0.3 0.5 V VOL31 I RESET=0.5mA, VS=OPEN 0.2 0.4 VOL41 I RESET=1mA, VS=OPEN 0.3 0.5 Output sink current IOL1 1 V =1.0V, V S=0V 10 16 mA IOL21 V RESET=1.0V, VS=OPEN 1 2 ICT11 VTC = 1.0V during watchdog -8 -12 -24 µA CT charge current timer operation ICT21 VTV = 1.0V during power -0.8 -1.2 -2.4 µA on reset operation Minimum operating power VCCL1 1 0.8 1.0 V supply voltage to ensure RESET Minimum operating power VCCL21 IRESET=VCC-0.1V 0.8 1.0 V supply voltage to ensure RESET RL2 (between Pin 2 and GND) =1MΩ RESET RESET RESET RESET VS=OPEN, VCC VS=OPEN, VCC V =0.4V I =0.2mARESET RESET VSH-VSL, VCC
MITSUMI System Reset (with built-in watchdog timer) MM1035 Electrical Characteristics 2 (AC) (Except where noted otherwise, Ta=25°C, V CC=5V, measurement circuit 2) Item Symbol Measurement Measurement conditions Min. Typ. Max. Units circuit VCC input pulse width TPI 28 µ S CK input pulse width TCKW 23 µ S CK input cycle TCK 22 0 µ S Watchdog timer TWD 2C T=0.1µF 5 10 15 mS monitoring time *1 Reset time for TWR 2C T=0.1µF 1 2 3 mS watchdog timer *2 Reset hold time for TPR 2 50 100 150 mS power supply rise *3 TPD12 RESET pin 21 0 Output delay time from VCC RL1=2.2kΩ , CL1=100pF µS TPD22 RESET pin 31 0 RL2=10kΩ , CL2=20pF tR12 RESET pin 1.0 1.5 Output rise time RL1=2.2kΩ , CL1=100pF µS tR22 RESET pin 1.0 1.5 µS RL2=10kΩ , CL2=20pF VCC CK or CT=0.1µF, VCC Notes : *1: Monitoring time is the time from the last pulse (negative edge) of the timer clear clock pulse, until reset pulse output. In other words, reset output is output if a clock pulse is not input during this time. *2: Reset time means reset pulse width. However, this does not apply to power on reset. *3: Reset hold time is the time from when V CC exceeds detection voltage (VSH) during power on reset, until RESET output goes high (reset release). *4: Output delay time is the time from when power supply voltage drops below detection voltage (V SL), until RESET output goes low (reset status). *5: Voltage range when measuring output rise and fall is 10~90%. *6: Watchdog timer monitoring time (T WD), watchdog timer reset time (TWR) and reset hold time (TPR) during power supply rise can be changed by varying CT capacitance. The times are expressed by the following formulae. The recommended range for CT is 0.001~10µF. TPR (mS) .=. 1000 CT (µF) Example : When C T=0.1µF TWD (mS) .=. 100 CT (µF) T PR .=. 100mS TWR (mS) .=. 20 CT (µF) T WD .=. 10mS TWR .=. 2mS
MITSUMI System Reset (with built-in watchdog timer) MM1035 Block Diagram Note 1: CP = 0.1µF approx. Note 2: C 1000pF. Note 3: The watchdog timer can be stopped by connecting the RCT pin to GND. (Then it functions as a voltage detection circuit.) Timing Chart VCC CK CT RESET RESET VSH VSL TCK TPR TWD TWR Pin Assignment 14 32 85 67 1 TC
2 RESET
4 GND
5 VCC
6 RCT
8 RESET
MITSUMI System Reset (with built-in watchdog timer) MM1035 Pin Description Pin No. Pin Name Function 1 TC TWD, TWR, TPR variable pins. (TWD, TWR and TPR times are determined by the external capacitor.)
2 RESET Reset output pin (High output)
3 CK Clock input pin (inputs clock from logic system)
4 GND Reset output pin (High output)
5 VCC 4.2V detection voltage Operation modes: Operation OPEN, Stop connect to GND 7 VS Detection voltage variable pin Variation modes : Lower pull up resistance, Raise pull down Reset output pin (Low output) Measuring Circuit Measuring Circuit 1 (DC) Measuring Circuit 2 (AC)
MITSUMI System Reset (with built-in watchdog timer) MM1035 Measuring Circuit 1 SW Table 6-1-2. SW&Power Supply Table 1 Item Symbol SW1 SW2 SW3 SW4 SW5 SW6 SW7 V CC VCK VCT II RESET VM, IM Notes Consumption current ICC OFF OFF OFF ON B B ON 5V 5V 0V -- ICC Detection voltage VSL OFF OFF ON ON B B ON 5V 0V 3V 3V -- VO1, CRT1 VSH OFF OFF ON ON B B ON 4V 5V 3V 3V -- VO1, CRT1 CK input threshold VTH OFF OFF OFF ON B B ON 5V 0V 3V 1V -- ICK CK input current IIH OFF OFF OFF ON B B ON 5V 5V 0V -- ICK IIL OFF OFF OFF ON B B ON 5V 0V 0V -- ICK Output voltage (High) VOH1 ON OFF ON ON B B ON 5V 5V 3V -5µA - VO1 VOH2 OFF ON ON ON C B ON 5V 5V 3V -- 5µA V O2 VOL1 O NO NO NO N B B O N 5 V 5 V 3 V 3 m A - VO1 Output voltage (Low) VOL2 ON ON ON ON B B ON 5V 5V 3V 10mA - VO1 VOL3 OFF OFF ON ON C B ON 5V 5V 3V - 0.5mA V O2 VOL4 OFF OFF ON ON C B ON 5V 5V 3V - 1mA V O2 Output sink current IOL1 OFF ON ON ON B C ON 5V 5V 3V -- IO1 VOO=1V IOL2 OFF OFF ON ON B A ON 5V 5V 3V -- IO2 VOO=1V CT charge current 1 ITC1 OFF OFF OFF ON B B OFF 5V - 1V -- ITC CT charge current 2 ITC2 OFF OFF ON ON B B OFF 5V - 1V -- ITC Minimum operating power supply voltage to ensure reset VCCL1 ON OFF ON ON B B ON 0V 2V 0V 0V - VO1, VCC Minimum operating power supply voltage to ensure reset VCCL2 OFF ON ON ON A B ON 0V 2V 0V 0V -- VO2, VCC RESET Measuring Circuit 2 SW Table 6-2-2. SW&Power Supply Table 2 Item Symbol SW1 SW2 V CCA VCC VCKA VCK CRT Notes VCC input pulse width TPI CB -- CRT1,2,3 T1=8µS CK input pulse width TCKW AB 5 V - CRT1,2,3 T2=3µS CK input cycle TCK AB 5 V - CRT1,2,3 T3=20µS Watchdog timer monitoring time TWD A A 5V 5V CRT1,2,3 Reset time for watchdog timer TWR A A 5V 5V CRT1,2,3 Reset hold time for power supply rise TPR B A A 5V 5V CRT1,2,3 TPD1C A - 0V CRT1,3 Output delay time from VCC TPD2C A - 0V CRT2,3 Output rise time TR1 A A 5V 5V CRT1 TR2 A A 5V 5V CRT2 Output fall time TP1 A A 5V 5V CRT1 TP2 A A 5V 5V CRT2 T1 1.4V T2 T3 1.4V T2or 1.4V T2 T3
MITSUMI System Reset (with built-in watchdog timer) MM1035 Detection Voltage Variation 1 (lowering detection voltage) Detection voltage can be changed by connecting resistor R1 externally to MM1035 Vs pin. Determine R1 according to graph 1 when changing Vs. Vs pin external resistance (R1) (kΩ ) 4.0 3.5 3.0 100 200 300 400 500 600 VSH value VSL value Detection voltage (Vs) (V) Graph 1. Detection voltage change using MM1035 external resistor Detection Voltage Variation 2 (raising detection voltage) Detection voltage can be changed by connecting resistor R2 externally to MM1035 Vs pin. Determine R2 according to graph 2 when changing Vs. 5.0 4.5 100 200 300 400 500 600 Detection voltage (Vs) (V) Vs pin external resistance (R1) (kΩ ) VSH value VSL value Graph 2. Detection voltage change using MM1035 external resistor
MITSUMI System Reset (with built-in watchdog timer) MM1035 Characteristics Power supply current-Power supply voltage Clock pulse input time 1.4 1.2 1.0 0.8 0.6 0.4 0.2 Power supply current Icc (mA) Power supply voltage VCC (V) Output voltage-Power supply voltage (RESET pin) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 Ta=20°C.25°C.75°C PULL UP resistance 10kΩ Power supply current Icc (mA) Power supply voltage VCC (V) Output voltage-Power supply voltage (RESET pin) Ta=-25°C Ta=25°C Ta=75°C 7.0 6.0 5.0 4.0 3.0 2.0 1.0 PULL UP resistance 2.2kΩ Output voltage VRESET (V) Power supply voltage VCC (V) Detection voltage (VSL, VSH) temperature (RESET, RESET pins) 4.50 4.40 4.30 4.20 4.10 4.00 3.00 -40 -20 0 20 40 60 80 100 Ambient temperature Ta (°C) VSH VSL Detection voltage (V) Output saturation voltage-Output sink current (RESET pin) Ta=75°C Ta=25°C Ta=-25°C 500 400 300 200 100 Output saturation voltage VOL (mV) Output sink current IOL (mA) Output saturation voltage-Output sink current (RESET pin) 500 400 300 200 100 2 4 6 8 10 12 14 16 18 Ta=75°C Ta=25°C Ta=-25°C Output saturation voltage VOL (mV) Output sink current IOL (mA)
MITSUMI System Reset (with built-in watchdog timer) MM1035 High level output voltage-High level output current (RESET pin) 5.0 4.8 4.6 4.4 4.2 4.0 3.8 High level output voltage VOM (V) High level output current IOM (µA) High level output voltage - High level output current (RESET pin) 5.0 4.8 4.6 4.4 4.2 4.0 3.8 High level output voltage VOM (V) High level output current IOM (µA) Reset hold time temperature during power supply rise 160 140 120 100 -40 -20 0 20 40 60 80 100 VCC=5V (Cr=0.1µF) Reset hold time temperature during power supply rise TPR (mS) Ambient temperature Ta (°C) Watchdog timer monitoring time temperature -40 -20 0 20 40 60 80 100 VCC=5V (Cr=0.1µF) Watchdog timer monitoring time temperature TWD (mS) Ambient temperature Ta (°C) Reset time temperature (for watchdog timer) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 -40 -20 0 20 40 60 80 100 VCC=5V (Cr=0.1µF) Reset time TWR (mS) Ambient temperature Ta (°C) CT value for reset hold time during power supply rise 105 104 103 102 101 10-3 10-2 10-1 100 100 101 Hold time TWD (mS) CT capacitance (µF)
MITSUMI System Reset (with built-in watchdog timer) MM1035 CT value for reset time (for watchdog timer) 103 102 101 100 10-1 10-2 10-3 10-2 10-1 100 101 Reset time TWR (mS) CT capacitance (µF) CT value for watchdog timer monitoring time 104 103 102 101 100 10-1 10-3 10-2 10-1 100 101 Timer monitoring time TWD (mS) CT capacitance (µF)