Undervoltage Sensing Circuit
The MC34064 is an undervoltage sensing circuit specifically designed for use as a reset controller in microprocessorâbased systems. It offers the designer an economical solution for low voltage detection with a single external resistor. The MC34064 features a trimmedâinâpackage 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. The MC devices are packaged in 3âpin TO-92, micro size TSOPâ5, 8âpin SOICâ8 and Micro8surface mount packages. The NCV device is packaged in SOICâ8 and TOâ92. Applications include direct monitoring of the 5.0 V MPU/logic power supply used in appliance, automotive, consumer and industrial equipment.
Features
⢠TrimmedâInâPackage Temperature Compensated Reference
⢠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
⢠Internal Clamp Diode for Discharging Delay Capacitor
⢠Guaranteed Reset Operation with 1.0 V Input
⢠Low Standby Current
⢠Economical TOâ92, TSOPâ5, SOICâ8 and Micro8 Surface Mount Packages
⢠NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes
⢠PbâFree Packages are Available
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