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G676 Datasheet

Microprocessor Reset IC

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G676 pdf
Global Mixed-mode Technology
G676/G677
Microprocessor Reset IC
Features
„ Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
„ Fully Specified Over Temperature
„ Available in Two Output Configurations
Push-Pull RESET Output (G676L)
Open-Drain RESET Output (G677L)
„ Adjustable Reset Delay Time
„ Manual Reset Input with Adjustable Manual Re
set Deglitch Time
„ 14µA Supply Current
„ Guaranteed Reset Valid to VCC = 1V
„ Power Supply Transient Immunity
„ 6 pin SOT-23-6 and ADFN1.5X1.5-6 Packages
„ 2% Threshold Accuracy
Applications
„ Computers
„ Controllers
„ Intelligent Instruments
„ Critical µP and µC Power Monitoring
„ Portable / Battery-Powered Equipment
„ Automotive
Ordering Information
ORDER NUMBER
MARKING
G676LxxxTBU
676xx
G677LxxxTBU
G676LxxxA31U
G677LxxxA31U
677xx
66
xx
67
xx
* xxx specifies the threshold voltage.
e.g. 263 denotes the 2.64V threshold voltage.
TB: SOT-23-6 A3:ADFN1.5X1.5-6
1 : Bonding Code
U: Tape & Reel
Pin Configuration
CD 1
G676/G677
6 MR
G676/G677
MRDLY 1
6 VCC
GND 2
MRDLY 3
SOT-23-6
5 RESET
4 VCC
GND 2
5 RESET
CD 3
4 MR
ADFN1.5X1.5-6
Ver:1.0
Apr 17, 2012
General Description
The G676/G677 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 VCC supply voltage declines
below a preset threshold or manual reset is triggered,
and keeping it asserted for time delay determined by
adjustable time delay generator (CD pin) after VCC
has risen above the reset threshold or manual reset is
released. Reset thresholds suitable for operation with
a variety of supply voltages are available. Manual re-
set is generated after pull low MR pin lastingly over
deglitch time delay set by capacitor connected in
MRDLY pin.
The G677L has an open-drain output stage, while the
G676 have push-pull outputs. The G677L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than VCC. The reset
comparator is designed to ignore fast transients on
VCC, and the outputs are guaranteed to be in the cor-
rect logic state for VCC down to 1V.
Low supply current makes the G676/G677 ideal for
use in portable equipment. The G676/G677 are avail-
able in 6-pin SOT-23-6 and ADFN1.5X1.5-6 packages.
TEMP. RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
PACKAGE
(Green)
SOT-23-6
SOT-23-6
ADFN1.5X1.5-6
ADFN1.5X1.5-6
Typical Application Circuit
VCC
VCC
MRDLY
Rpull-up*
VCC
CMR G676/G677
RESET
CD GND MR
µP
RESET
INPUT
GND
CD
*G677 ONLY
ICC may increased at high TA, Therefore, can not connect
Resistors to VCC to prevent Icc abnormal behavior at high TA.
TEL: 886-3-5788833
http://www.gmt.com.tw
1


Part Number G676
Description Microprocessor Reset IC
Maker GMT
Total Page 1 Pages
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