BA6129AF 查看數據表（PDF） - ROHM Semiconductor

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BA6129AF

Reset IC with battery backup function

ROHM Semiconductor 

Memory ICs

Reset IC with battery backup function

BA6129AF / BA6162 / BA6162F

The BA6129AF, BA6162, and BA6162F are reset ICs with a battery backup function, designed for equipment using

SRAMs and other similar components. These ICs are configured of a reset signal and CS signal output unit and a

power supply switching unit. If the BA6129AF detects that the power supply has dropped to 3.5V or lower, it outputs

the CS, CSB, and Reset signals to set the SRAM in backup mode. If the voltage drops to 3.3V or lower, the power

supply switches to the battery. With the BA6162 and BA6162F, in the same way, a power supply of 4.2V is detected,

and if the voltage drops to 3.3V or lower, the power supply switches to the battery. These ICs allow SRAMs to be

write protected and allow the system to be reset, in addition to switching between the power supply and the battery.

•Applications

Equipment using SRAMs (cards, cassettes, facsimile machines, copiers, word processors, personal computers, etc.)

•Features

1) Equipped with battery backup function.

2) Equipped with both CS signals (CS and CSB) and

Reset signals.

3) Low current dissipation when powered from battery.

4) Low voltage loss when powered from battery.

5) Smooth switching between power supply and bat-

tery.

•Absolute maximum ratings (Ta = 25°C)

Parameter

Symbol

Limits

Unit

Power supply voltage

VCC

7.0

V

Output current 1

– 80 (BA6129AF)

IOUT1

mA

– 40 (BA6162 / BA6162F)

Output current 2

Power dissipation

IOUT2

– 200

µA

900∗1 (BA6162)

Pd

550∗2 (BA6129AF)

mW

(BA6162F)

Operating temperature

Storage temperature

Topr

Tstg

– 20 ~ + 75

°C

– 40 ~ + 125

°C

IOUT1 indicates the output current on the VCC side, and IOUT2 the output current on the VBAT side.

∗1 Reduced by 9.0mW for each increase in Ta of 1°C over 25°C.

∗2 Reduced by 5.5mW for each increase in Ta of 1°C over 25°C.

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