English
Language : 

G674 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Microprocessor Reset IC
Global Mixed-mode Technology
G674/G675
Microprocessor Reset IC
Features
„ Precision Monitoring of +2.5V and +3V
Power-Supply Voltages
„ Fully Specified Over Temperature
„ Available in Three Output Configurations
Push-Pull RESET Output (G674L)
Push-Pull RESET Output (G674H)
Open-Drain RESET Output (G675L)
„ Externally Programmable Time Delay Generator
„ 14µA Supply Current
„ Guaranteed Reset Valid to VCC = 0.8V
„ Power Supply Transient Immunity
„ 5 pin SOT-23-5 and 6 pin TDFN2X2 Packages
„ 2% Threshold Accuracy
Applications
„ Computers
„ Controllers
„ Intelligent Instruments
„ Critical µP and µC Power Monitoring
„ Portable / Battery-Powered Equipment
„ Automotive
General Description
The G674/G675 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 +2.5V,
+3.0V powered circuits.
These circuits perform a single function: they assert a reset
signal whenever the VCC supply voltage declines below a
preset threshold, with hysteresis keeping it asserted for
time delay determined by externally programmable time
delay generator after VCC has risen above the reset thresh-
old. Reset thresholds suitable for operation with a variety of
supply voltages are available.
The G675L has an open-drain output stage, while the
G674 have push-pull outputs. The G675L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than VCC. The G674L have
an active-low RESET output, while the G674H has an
active-high RESET output. The reset comparator is de-
signed to ignore fast transients on VCC, and the outputs
are guaranteed to be in the correct logic state for VCC
down to 0.8V.
Ordering Information
ORDER
NUMBER
G674HxxxT1U
G674LxxxT1U
G675LxxxT1U
G674HxxxRB1U
G674LxxxRB1U
G675LxxxRB1U
* xxx specifies the threshold voltage.
e.g. 240 denotes the 2.4V threshold voltage.
Low supply current makes the G674/G675 ideal for use in
portable equipment. The G674/G675 are available in
5-pin SOT-23-5 and 6 pin TDFN2X2 packages.
TEMP.
RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
PACKAGE
(Green)
SOT-23-5
SOT-23-5
SOT-23-5
TDFN2X2-6
TDFN2X2-6
TDFN2X2-6
Pin Configuration
Typical Application Circuit
RESET(RESET) 1
5 CD
G674/G675
GND 1
6 CD
VCC 2 G674/G675
RESET(RESET) 2 Thermal
Pad
5 N.C.
VCC 3
4 N.C.
GND 3
4 N.C.
TDFN2X2-6
SOT-23-5
()is for G674H
Note: Recommend connecting the Thermal Pad
to the Ground for excellent power dissipation.
VCC
VCC
G674/G675
CD
RESET
(RESET)
GND
CD
Rpull-up*
VCC
µP
RESET
INPUT
GND
*G675 ONLY
ICC may increased at high TA, Therefore, can not connect
Resistors to VCC to prevent Icc abnormal behavior at high TA.
Ver: 1.3
Apr 10, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
1