Datasheet > G693L263TAU

G693L263TAU

更新时间： 2024-02-27 03:00:44

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Power Management Circuit

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G693L263TAU 数据手册

Global Mixed-mode Technology Inc.

G692/G693

Pin Description

NAME

FUNCTION

SOT-143 SC-70-5

1,2

GND

Ground

RESET Output remains low while V_CCis below the reset threshold, and for at least

140ms after V_CCrises above the reset threshold.

RESET Output remains high while V_CCis below the reset threshold, and for at least

140ms after V_CCrises above the reset threshold.

RESET

(G693L/G692L)

RESET

(G692H)

Manual Reset Input. A logic low on MR asserts reset. Reset remains asserted as long

as MR is low and for at least 140ms afterMR returns high, This active-low input has

an internal 20kΩ pull- up resistor. It can be driven from a TTL or CMOS-logic line, or

shorted to ground with a switch. Leave open if unused.

VCC

Supply Voltage (+5V, +3.3V, +3.0V)

Detailed Description

600

A microprocessor's (µP's) reset input starts the µP in a

known state. The G693L/G692L/G692H assert reset to

prevent code-execution errors during power-up,

power-down, or brownout conditions. They assert a

reset signal whenever the V_CCsupply voltage declines

below a preset threshold, keeping it asserted for at

least 140ms after V_CChas risen above the reset

threshold. The G693L uses an open-drain output, and

the G692L/G692H have a push-pull output stage. Con-

500

400

300

200

100

nect a pull-up resistor on the G693L's RESET output to

any supply between 0 and 5.5V.

G69__308/293/263

The manual reset input (MR ) can also initiate a reset.

See the Manual Reset Input Section.

100

1000

Reset Comparator Overdrive, V_TH-V_CC(mV)

Manual Reset Input

Many µP-based products require manual reset capabil-

ity, allowing the operator, a test technician, or external

Figure1. Maximum Transient Duration without

Causing a Reset Pulse vs. Reset Com-

parator Overdrive

logic circuitry to initiate a reset. A logic low on MR as-

serts reset. Reset remains asserted while MR is low,

and for the Reset Active Timeout Period (t_RP) after

VCC

MR returns high. This input has an internal 20kΩ

pull-up resistor, so it can be left open if it is not used.

MR can be driven with TTL or CMOS-logic levels, or

with open-drain / collector outputs. Connect a normally

G692

RESET

open momentary switch from MR to GND to create a

manual-reset function; external debounce circuitry is

100k

GND

not required. If MR is driven from long cables or if the

device is used in a noisy environment, connecting a

0.1µF capacitor from MR to ground provides additional

noise immunity.

Figure2. RESET Valid to V_CC= Ground Circuit

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 1.7

May 19, 2006

1 2 3 456 7 8

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