Datasheet > G656/7

G656/7

更新时间： 2024-04-09 19:01:50

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描述
G656H/L is a Push-Pull High/Low Reset G657L is an Open-Drain Low Reset TCD(ms) = 5700× CD (uF)

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G656/7 数据手册

G656/G657

Global Mixed-mode Technology

Microprocessor Reset IC

Features

General Description

Precision Monitoring Voltage of +2.2V and

+3.7V

The G656/G657 are microprocessor (µP) supervisory

circuits used to monitor the power supplies in µP and

digital systems. They provide excellent circuit reliability

and low cost.

Fully Specified Over Temperature

Available in Three Output Configurations

Push-Pull RESET Output (G656L)

Push-Pull RESET Output (G656H)

Open-Drain RESET Output (G657L)

Reset Deassert Time Smaller than 100µs when

V_CCHigher than Monitor Voltages (CD Pin Float-

ing)

These circuits perform a single function: they assert a

reset signal whenever the V_CCsupply voltage declines

below a preset threshold, with hysteresis keeping it

asserted for time delay determined by externally pro-

grammable time delay generator after V_CChas risen

above the reset threshold.

Externally Programmable Time Delay Generator

27µA Supply Current at V_CC=3.3V

Guaranteed Reset Valid to V_CC= 0.8V

TSOT-23-5 Packages

The G657L has an open-drain output stage, while the

G656 have push-pull outputs. The G657L’s open-drain

RESET output requires a pull-up resistor that can be

connected to a voltage higher than V_CC. The G656L

2% Threshold Accuracy

has an active-low RESET output, while the G656H

has an active-high RESET output. The outputs are

guaranteed to be in the correct logic state for V_CC

down to 0.8V.

Applications

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable / Battery-Powered Equipment

Automotive

The G656/G657 are available in 5-pin TSOT-23-5

package.

Pin Configuration

Typical Application Circuit

V_CC

G656/G657

VCC

RESET

(RESET)

R_pull-up

G656/G657

µP

RESET

INPUT

VCC

GND

RESET

(RESET)

GND

C_D

GND

TSOT-23-5

()is for G656H

*G657 only

ICC may increased at high T_A, Therefore, can not connect

Resistors to VCC to prevent Icc abnormal behavior at high T_A.

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 0.4

Apr 10, 2012

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