ROHM BH6150F Datasheet

1

Memory ICs

System reset IC

BH6150F

The BH6150F has two reset circuits, one detects the power supply voltage, and the other detects the input voltage.
With this one IC it is possible to apply a reset to the logic systems of CPUs, and mechanical systems.

•

Applications
Personal computers, CPUs, MPUs, logic circuits, reset
circuits for mechanical systems, level detector circuits,
battery voltage detector circuits, and backup power
supply switching circuits

•

Features
Two types of reset circuit provided.

1) Reset circuit 1 (input voltage detector)

Detection voltage: 1.25V (Typ.)
Transmission delay time: 200µs (Typ.)
Open collector output, and 10kΩ pull-up resistor on
chip.

2) Reset circuit 2 (supply voltage detector)
Detection voltage: 4.2V (Typ.)
Transmission delay time: 25, 50, 100 and 200 ms
(select using the Ct0 and Ct1 pins)
Manual reset function provided
Open collector output, and 10kΩ pull-up resistor on
chip.

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Absolute maximum ratings (Ta = 25°C)

Parameter Symbol Limits Unit
Power supply voltage
Power dissipation
Operating temperature
Storage temperature

V

CC

Pd
Topr
Tstg

V

mW

°C
°C

∗

Reduced by 4.5mW for each increase in Ta of 1°C over 25°C.

– 0.3 ~ + 7.0

– 20 ~ + 75

– 40 ~ + 125

450

∗

2

Memory ICs BH6150F

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Block diagram

–

+

–

+
–

Delay

Circuit

Reset Circuit 2

Reset Circuit 1

10k

10k

1234

8765

Vref

1.25V

Vref

1.25V

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Pin descriptions

Pin No. Pin name Function

1
2
3
4
5
6
7
8

∗

When neither Ct0 or Ct1 are connected, the delay time is 100ms (Typ.).

Ct0

Input

Ct1

GND
Output 2
Output 1

V

CC

Manual reset

Delay time control

∗

Reset circuit 1 input
Delay time control

∗

GND
Reset circuit 2 output
Reset circuit 1 output
Power supply
Manual reset input

3

Memory ICs BH6150F

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Input / output circuits

Input

Ct0, Ct1

Manual reset Output 1, Output 2