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Data Sheet

PT7M7433/34/35 μ P Supervisory Circuit

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Features

Description

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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

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 low-power

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.

Applications

Ordering Information

Part Number

Package

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Monitoring lithiumion (Li+) cells or multicell

alkaline/ NiCd/ NiMH power supplies.

PT7M7433TAE

PT7M7434TAE

PT7M7435TAE

lead-free and Green SOT23-5

lead-free and Green SOT23-5

lead-free and Green SOT23-5

Table 1. Function comparison of PT7M7433/34/35

Output

Threshold

Item

Part No.

Open-Drain Push-Pull

Active high Active low Active low

Single

Dual

Factory

fixed

User

adjustable

Package

1

PT7M7433 - -

√

√

-

-

√

2

PT7M7434 -

√

-

√

-

-

√

SOT23-5

3

PT7M7435

√

- -

√

-

-

√

PT0213(05/09)

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Ver: 3