Datasheet > G681LT1F

G681LT1F

更新时间： 2024-11-17 08:49:47

品牌	Logo	应用领域
致新 - GMT		光电二极管
页数	文件大小	规格书
7页	218K
描述
Power Supply Support Circuit, Fixed, 1 Channel, +1.25VV, PDSO5, SOT-23, 5 PIN

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G681LT1F 数据手册

Global Mixed-mode Technology Inc.

G680/G681

Microprocessor Reset IC

Features

General Description

High ±2% Voltage Threshold Accuracy

The G680/G681 are microprocessor (µP) supervisory

circuits used to monitor the power supplies in µP and

digital systems. High- and Low- voltage thresholds can

be adjusted independently, allowing for wide hystere-

sis. Voltage detection thresholds are accurate to 2%.

Independently Adjustable High- and Low-

Voltage Thresholds

Fully Specified Over Temperature

Available in Three Output Configurations

Push-Pull RESET Output (G680L)

Push-Pull RESET Output (G680H)

These circuits perform a single function: they assert a

reset signal whenever the V_CCsupply voltage declines

below the low-voltage threshold, keeping it asserted

for at least 140ms after V_CChas risen above the

high-voltage threshold.

Open-Drain RESET Output (G681L)

140ms min Power-On Reset Pulse Width

4µA Supply Current

Power Supply Transient Immunity

5-Pin SOT-23-5 Packages

The G681L has an open-drain output stage, while the

G680 have push-pull outputs. The G681L’s open-drain

RESET output requires a pull-up resistor that can be

connected to a voltage higher than V_CC. The G680L

Applications

Computers

have an active-low RESET output, while the G680H

has an active-high RESET output. The reset com-

parator is designed to ignore fast transients on thresh-

old input.

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable / Battery-Powered Equipment

Automotive

The IC’s power supply is separate from the detector

inputs, allowing the G680/G681 to be powered from a

down-stream supply. Low supply current (4µA, typical)

makes the G680/G681 ideal for use in portable

equipment. The G680/G681 are available in 5 pin SOT

-23-5 packages.

Ordering Information

ORDER

NUMBER

G680H(L)T1

G681LT1

ORDER NUMBER

TEMP. RANGE

PIN-PACKAGE

(Pb free)

G680H(L)T1f

G681LT1f

-40°C ~ +105°C

SOT-23-5

Pin Configuration

Typical Application Circuit

V_CC

HTH

Vcc

V_CC

HTH

R_PULL-UP

GND

LTH

µP

G680/G681

SOT-23-5

G680/G681

RESET

(RESET)

LTH

INPUT

GND

RESET(RESET)

*G681 ONLY

() is for G680H

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 1.3

Dec 13, 2004

12 3 4 5 6 7

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