Diodes Incorporated

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Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

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PT7M64xxCH# (Obsolete)

Low power consumption with 200ms delay time supervisory Circuit

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The PT7M64xx series are µP supervisory circuits with a minimum reset timeout period of 120ms. Each circuit includes a precise bandgap reference; a comparator, a reset timeout circuit, internally trimmed resistor networks that set specified trip thresholds, and an internal 5% threshold hysteresis circuit (see the Block Diagram). Output is asserted when VCC falls below the internal VTH- and remains asserted until VCC rises above VTH+ (VTH+ = VTH-×1.05) after a reset timeout period. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring normal systems voltage from +1.8V to +5V in 100mV increments. The series are voltage detectors with a propagation delay of 35µs.

The family is available with four output stage options: push-pull with active-low output, push-pull with active high output, open drain with active-low output and bidirection port with active-low output and pushbutton reset input. These devices specified over the -40°C to +85°C temperature range.


  • High accuracy: ±2% (25°C)
  • Low power consumption: 0.6μA @ 3V Vcc
  • Detecting voltage range: 1.8 to 5V in 100mV increments
  • Operating voltage range: 1.2V ~ 5.5V
  • Operating temperature range: -40°C to + 85°C
  • Detecting voltage accuracy over temperature: ±2.5% x TYP
  • Output configuration: N-channel open drain or CMOS
  • Reset timeout period at least 120ms

Product Specifications

Product Parameters

Adjustable Detect Voltage Reference Voltage (V) N/A
Ambient Temperature Range  (°C) -40 to 85
Fixed Detect Voltages (V) 1.8 to 5
Manual RESET No
Maximum Input Voltage (V) 5.5
Minimum Operating Voltage (V) 1.2
Number of Channels 1
Power Fail Comparator Threshold (V) None
Quiescent Current (µA) 0.6
RESET Output (Active High) Yes
RESET Output (Active Low) No
Reset Output Topology Push-Pull
Reset Period (ms) 260
Typical Time Delay (µs) 35
Watchdog No
Watchdog Time (s) None

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