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The AZ70XX series ICs are under voltage detectors with a built in voltage threshold and low power consumption. The AZ70XX are specifically designed to accurately monitor power supplies. The AZ70XX use a precision on-chip voltage reference and a comparator to measure the input operating voltage. These ICs can accurately reset the system after detecting voltage at the time of switching power on and instantaneous power off in various CPU systems and other logic systems. The detect voltage thresholds are 2.3V/2.5V/2.7V/2.9V/3.1V/3.3V/4.2V/4.5Vfor AZ7023/25/27/29/31/33/42/45 respectively. Built in hysteresis helps to prevent erratic operation in the presence of noise.


  • Low Current Consumption: ICCL=300μA Typical ICCH=30μA Typical
  • Low Minimum Operating Voltage for Output Resetting: 0.8V Typical
  • Built in Hysteresis Voltage: 50mV Typical
  • Open Collector Output
  • Extended Temperature Range: -40 to 85°C


  • Low Battery Voltage Detector
  • Power Fail Indicator
  • Processor Reset Generator
  • Battery Backup Control
  • Home Electric Appliances

Product Specifications

Product Parameters

Fixed Detect Voltages (V) 2.3, 2.5, 2.7, 2.9, 3.1, 3.3, 4.2, 4.5 V
Adjustable Detect Voltage Reference Voltage (V) N/A V
Number of Channels 1
Minimum Operating Voltage (V) 1 V
Maximum Input Voltage (V) 5.5 V
Quiescent Current (µA) 500 µA
Typical Time Delay (µs) N/A µs
Reset Period (ms) 0 ms
RESET Output (Active High) No (Active High)
RESET Output (Active Low) Yes (Active Low)
Manual RESET No
Watchdog No
Watchdog Time (s) None s
Power Fail Comparator Threshold (V) None V
Reset Output Topology Open-Collector
Ambient Temperature Range  (°C) -40 to 85 °C

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Technical Documents

Recommended Soldering Techniques


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Application information, Evaluation board, and Other technical documents

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2514 2021-03-09 2021-06-09 Additional Wafer Source JKFAB