G696 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Microprocessor Reset IC

Global Mixed-mode Technology
G696/G697
Microprocessor Reset IC
Features
„ Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
„ Fully Specified Over Temperature
„ Available in Three Output Configurations
Push-Pull RESET Output (G696L)
Push-Pull RESET Output (G696H)
Open-Drain RESET Output (G697L)
„ Externally Programmable Time Delay Generator
„ 14µA Supply Current
„ Guaranteed Reset Valid to V_CC = 0.8V
„ Power Supply Transient Immunity
„ 5 pin SOT-23-5 or TSOT-23-5 Packages
„ 2% Threshold Accuracy
Applications
„ Computers
„ Controllers
„ Intelligent Instruments
„ Critical µP and µC Power Monitoring
„ Portable / Battery-Powered Equipment
„ Automotive
General Description
The G696/G697 are microprocessor (µP) supervisory
circuits used to monitor the power supplies in µP and
digital systems. They provide excellent circuit reliability
and low cost and adjustments when used with +5V,
+3.3V, +3.0V- powered circuits.
These circuits perform a single function: they assert a
reset signal whenever the V_CC supply voltage declines
below a preset threshold, with hysteresis keeping it
asserted for time delay determined by externally pro-
grammable time delay generator after V_CC has risen
above the reset threshold. Reset thresholds suitable
for operation with a variety of supply voltages are
available.
The G697L has an open-drain output stage, while the
G696 have push-pull outputs. The G697L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than V_CC. The G696L
have an active-low RESET output, while the G696H
has an active-high RESET output. The reset com-
parator is designed to ignore fast transients on V_CC,
and the outputs are guaranteed to be in the correct
logic state for V_CC down to 0.8V.
Low supply current makes the G696/G697 ideal for
use in portable equipment. The G696/G697 are avail-
able in 5-pin SOT23-5 or TSOT-23-5 packages.
Pin Configuration
Typical Application Circuit
RESET 1
(RESET)
5 CD
VCC 2 G696/G697
GND 3
4 NC
SOT-23-5/TSOT-23-5
()is for G696H
V_CC
VCC
G696/G697
CD
RESET
(RESET)
GND
C_D
R_pull-up*
VCC
µP
RESET
INPUT
GND
*G697 ONLY
ICC may increased at high TA, Therefore, can not connect
Resistors to VCC to prevent Icc abnormal behavior at high TA.
Ver: 2.7
Apr 10, 2012
TEL: [phone]
http://www.gmt.com.tw
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