MM1174 查看數據表（PDF） - Mitsumi

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MM1174

System Reset (with battery back-up)

Mitsumi 

MITSUMI

System Reset (with battery back-up) MM1025, 1174

System Reset (with battery back-up)

Monolithic IC MM1025, 1174

Outline

These ICs were developed for D-RAM and dummy S-RAM battery back-up. D-RAM and dummy S-RAM

power supplies differ from that of S-RAMs because 5V or 3.3V of power supply is required even during

battery back-up. Therefore, these ICs provide voltage from a stable power supply during both normal

operation and back-up. Also, the internal stable power supply switches automatically to battery back-up if the

main power supply voltage goes down for any reason.

Features

1. Battery back-up

MM1025

Current consumption

Input/output voltage difference IL=40mA

Output current

MM1174

Current consumption

Input/output voltage difference IL=40mA

Output current

2. Normal operation

MM1025

Input/output voltage difference IL=80mA (built-in transistor)

Output current

VCC=6V

External transistor drive current VCC= 6V

Current consumption

MM1174 (for external transistor)

Input/output voltage difference IL=200mA

Output current

External transistor drive current (no built-in TR) VCC=3.6V

Current consumption

600µA typ.

0.25V typ.

40mA max.

300µA typ.

0.13V typ.

40mA max.

0.29V typ.

80mA typ.

15mA typ.

900µA max.

0.13V typ.

Depends on external transistor

10mA typ.

500µA max.

3. Switching voltage from VCC to Battery VCC=High Low

MM1025

4.9V typ.

MM1174

3.25V typ.

4. VCC-Battery forced switching and detection voltage adjustment possible

Package

SOP-8A

Applications

1. Memory cards (D-RAM cards, other)

2. PCs, word processors and other equipment with D-RAMs

3. Fax machines, photocopiers and other office equipment with D-RAMs

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