Diodes Incorporated

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PT7M7437 (Obsolete)

User-Adjustable Active Low open-drain and SOT23-6 Supervisory Circuit

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Product Description

The PT7M7436/37/38 are dual-level battery monitors with internal hysteresis. These devices are offered with dual low-battery output indicators which can be used to indicate three battery conditions: good (operate system in normal mode), weak (operate system in low-power mode), or empty (disable the system). 


  • User-Adjustable Low/High Thresholds with 585mV/615mV Internal Reference
  • Low Current (1.5μA typ)
  • Dual Low-Battery Outputs
  • Push-Pull active low, Open-Drain active low and Open-Drain active high output options
  • 90ms Minimum LBOA/LBOL Timeout Period
  • Immune to Short Battery Voltage Transients
  • -40°C to + 85°C Operating Temperature Range


  • Monitoring lithiumion (Li+ ) cells or multicell alkaline/ NiCd/ NiMH power supplies.

Product Specifications

Product Parameters

Fixed Detect Voltages (V) N/A V
Adjustable Detect Voltage Reference Voltage (V) 0.585 V
Number of Channels 1
Minimum Operating Voltage (V) 1.8 V
Maximum Input Voltage (V) 5.5 V
Quiescent Current (µA) 1.5 µA
Typical Time Delay (µs) 100 µs
Reset Period (ms) 200 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-Drain
Ambient Temperature Range  (°C) -40 to 85 °C

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Technical Documents

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Additional Technical Documents are available upon request:
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-2519 2021-05-20 2021-11-20 Device End of Life (EOL)