MC34064/D MC34064 MC33064 226AA MC34064D MC34064DM MC34064P MC33064D MC33064DM - Datasheet Archive

 

MC34064 MC33064 Undervoltage Sensing Circuit The MC34064 is an undervoltage sensing circuit specifically designed for use as a

 

Order this document by MC34064/D MC34064/D MC34064 MC34064 MC33064 MC33064 Undervoltage Sensing Circuit The MC34064 MC34064 is an undervoltage sensing circuit specifically designed for use as a reset controller in microprocessor-based systems. It offers the designer an economical solution for low voltage detection with a single external resistor. The MC34064 MC34064 features a trimmed-in-package bandgap reference, and a comparator with precise thresholds and built-in hysteresis to prevent erratic reset operation. The open collector reset output is capable of sinking in excess of 10 mA, and operation is guaranteed down to 1.0 V input with low standby current. These devices are packaged in 3-pin TO-226AA, 8-pin SO­8 and Micro­8 surface mount packages. Applications include direct monitoring of the 5.0 V MPU/logic power supply used in appliance, automotive, consumer and industrial equipment. · Trimmed-In-Package Temperature Compensated Reference · · · · · · · · UNDERVOLTAGE SENSING CIRCUIT SEMICONDUCTOR TECHNICAL DATA Comparator Threshold of 4.6 V at 25°C Precise Comparator Thresholds Guaranteed Over Temperature Comparator Hysteresis Prevents Erratic Reset Reset Output Capable of Sinking in Excess of 10 mA P SUFFIX PLASTIC PACKAGE CASE 29 (TO­226AA 226AA) 1 Internal Clamp Diode for Discharging Delay Capacitor Pin 1. Reset 2. Input 3. Ground 2 3 Guaranteed Reset Operation with 1.0 V Input Low Standby Current Economical TO­226AA 226AA, SO­8 and Micro­8 Surface Mount Packages D SUFFIX PLASTIC PACKAGE CASE 751 (SO­8) DM SUFFIX PLASTIC PACKAGE CASE 846A (Micro­8) Representative Block Diagram Input 8 1 8 1 2 (2) Reset Reset 1 8 N.C. Input 2 7 N.C. N.C. 3 6 N.C. Ground 4 5 N.C. 1 (1) (Top View) 1.2 Vref ORDERING INFORMATION Device Gnd Operating Temperature Range Package 3 (4) = Sink Only Positive True Logic MC34064D MC34064D­5 MC34064DM MC34064DM­5 SO­8 TA = 0° to +70°C Micro­8 MC34064P MC34064P­5 Pin numbers adjacent to terminals are for the 3­pin TO­226AA 226AA package. Pin numbers in parenthesis are for the 8­lead packages. This device contains 21 active transistors. TO­226AA 226AA MC33064D MC33064D­5 SO­8 MC33064DM MC33064DM­5 TA = ­ 40° to +85°C MC33064P MC33064P­5 © Motorola, Inc. 1996 MOTOROLA ANALOG IC DEVICE DATA Micro­8 TO­226AA 226AA Rev 2 1 MC34064 MC34064 MC33064 MC33064 MAXIMUM RATINGS Symbol Value Unit Power Input Supply Voltage Rating Vin ­1.0 to 10 V Reset Output Voltage VO 10 V ISink Internally Limited mA IF 100 mA PD RJA 625 200 mW °C/W PD RJA 625 200 mW °C/W PD RJA 520 240 mW °C/W Operating Junction Temperature TJ +150 °C Operating Ambient Temperature MC34064 MC34064 MC33064 MC33064 TA Reset Output Sink Current (Note 1) Clamp Diode Forward Current, Pin 1 to 2 (Note 1) Power Dissipation and Thermal Characteristics P Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction­to­Air D Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction­to­Air DM Suffix, Plastic Package Maximum Power Dissipation @ TA = 25°C Thermal Resistance, Junction­to­Air Storage Temperature Range NOTE: °C 0 to +70 ­40 to +85 Tstg °C ­65 to +150 ESD data available upon request. ELECTRICAL CHARACTERISTICS (For typical values TA = 25°C, for min/max values TA is the operating ambient temperature range that applies [Notes 2 and 3] unless otherwise noted.) Characteristics Symbol Min Typ Max VIH VIL VH 4.5 4.5 0.01 4.61 4.59 0.02 4.7 4.7 0.05 ­ ­ ­ 0.46 0.15 ­ Unit 1.0 0.4 0.1 COMPARATOR Threshold Voltage High State Output (Vin Increasing) Low State Output (Vin Decreasing) Hysteresis V RESET OUTPUT Output Sink Saturation (Vin = 4.0 V, ISink = 8.0 mA) (Vin = 4.0 V, ISink = 2.0 mA) (Vin = 1.0 V, ISink = 0.1 mA) VOL V Output Sink Current (Vin, Reset = 4.0 V) ISink 10 27 60 mA Output Off-State Leakage (Vin, Reset = 5.0 V) IOH ­ 0.02 0.5 µA Clamp Diode Forward Voltage, Pin 1 to 2 (IF = 10 mA) VF 0.6 0.9 1.2 V Operating Input Voltage Range Vin 1.0 to 6.5 ­ ­ V Quiescent Input Current (Vin = 5.0 V) Iin ­ 390 500 µA TOTAL DEVICE NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. 3. Tlow = 0°C for MC34064 MC34064 Thigh = +70°C for MC34064 MC34064 ­40°C for MC33064 MC33064 +85°C for MC33064 MC33064 2 MOTOROLA ANALOG IC DEVICE DATA MC34064 MC34064 MC33064 MC33064 Figure 1. Reset Output Voltage versus Input Voltage 5.0 RL = 10 k to Vin TA = 25°C 8.0 VO , OUTPUT VOLTAGE (V) VO , OUTPUT VOLTAGE (V) 1 0 Figure 2. Reset Output Voltage versus Input Voltage 6.0 4.0 2.0 0 0 2.0 4.0 6.0 Vin, INPUT VOLTAGE (V) 8.0 RL = 10 k to Vin TA = 25°C 4.0 3.0 2.0 1.0 0 1 0 4.56 0 Figure 3. Comparator Threshold Voltage versus Temperature 4.64 0 Figure 4. Input Current versus Input Voltage 1.0 4.630 RL = 10 k to Vin 4.620 Upper Threshold High State Output I in , INPUT CURRENT (mA) V th, THRESHOLD VOLTAGE (V) 4.58 4.60 4.62 0 V , INPUT VOLTAGE (V) 0 0 in 4.610 4.600 4.590 Lower Threshold Low State Output 4.580 4.570 ­55 ­25 0 25 50 75 100 TA = +25°C 0.8 ­40°C 0.6 +85°C 0.4 TA = +25°C +85°C 0.2 0 125 ­40°C 0 2.0 4.0 6.0 8.0 TA, AMBIENT TEMPERATURE (°C) Figure 5. Reset Output Saturation versus Sink Current 10 Vin, INPUT VOLTAGE (V) Figure 6. Reset Delay Time 2.0 Reset V OL, OUTPUT SATURATION (V) Vin = 4.0 V TA = 25°C Vin = 5.0 V to 4.0 V RL = 10 k TA = 25°C 90% 1.5 TA = 85°C Vin TA = ­40°C 5.0 V ­ 1.0 4.0 V ­ Vin 10k 5.0V 4.0V 0.5 Reset 10% 0 REF 0 10 20 30 ISink, SINK CURRENT (mA) MOTOROLA ANALOG IC DEVICE DATA 40 200 ns/DIV 3 MC34064 MC34064 MC33064 MC33064 Figure 7. Clamp Diode Forward Current versus Voltage I F , FORWARD CURRENT (mA) 80 Vin = 0 V TA = 25°C 60 40 20 0 0 0.4 0.8 1.2 VF , FORWARD VOLTAGE (V) 1.6 Figure 8. Low Voltage Microprocessor Reset + R 2 (2) Reset Power Supply Microprocessor Circuit 1 (1) ­ CDLY ­ + A time delayed reset can be accomplished with the addition of CDLY. For systems with extremely fast power supply rise times (