Diodes Incorporated

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PT7M7433 (Not Recommended for new design)

NRND = Not Recommended for New Design

User-Adjustable Active Low Push-pull and SOT23-5 Supervisory Circuit

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Product Description

The PT7M7433/34/35 are single-level battery monitors with internal hysteresis. These devices are offered with single low-battery output indicators which can be used to indicate three battery conditions: good (operate system in normal mode), weak (operate system in lowpower mode), or empty (disable the system). The PT7M7433/34/35 are user-adjustable threshold voltages permitting the user to select the hysteresis range and consequently the sensitivity of the system to noise. A wide hysteresis range also prevents chattering that can result due to battery recovery after load removal.


  • User-Adjustable Low/High Thresholds with 615mV Internal Reference
  • Low Current (1.5μA typ)  Single Low-Battery Outputs
  • Push-Pull LBO, Open-Drain LBO and Open-Drain LBO options
  • 90ms Minimum LBO 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

Adjustable Detect Voltage Reference Voltage (V) 0.615
Ambient Temperature Range  (°C) -40 to 85
Fixed Detect Voltages (V) N/A
Manual RESET No
Maximum Input Voltage (V) 5.5
Minimum Operating Voltage (V) 1.8
Number of Channels 1
Power Fail Comparator Threshold (V) None
Quiescent Current (µA) 1.5
RESET Output (Active High) No
RESET Output (Active Low) Yes
Reset Output Topology Push-Pull
Reset Period (ms) 200
Typical Time Delay (µs) 70
Watchdog No
Watchdog Time (s) None

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