G686/7

G686/G687
Global Mixed-mode Technology
Low Voltage Reset IC
Features
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General Description
Monitor Supply Voltages of ±2% Reset Threshold Accuracy
Internal Set Reset Timeout Period 200ms (TYP)
Manual RESET Input ( MR )
Low Quiescent Current : 15µA at VCC=3.3V
Available in three RESET Output Options
Push-Pull RESET Output (G686L)
Push-Pull RESET Output (G686H)
Open-Drain RESET (G687L)
Guaranteed Reset Valid to VCC = 1V
Power-Supply Transient Immunity
SOT-23-5 Package
The G686/G687 microprocessor (µP) supervisory
circuits monitor system voltages in µP and digital
systems. They provide excellent circuit reliability at
low cost by eliminating external components.
Since the sense pin is separated from power supply,
it allows the IC to monitor added power supply. Using
the IC with the sense pin separated from power supply enables output to maintain the state of detection
even when voltage of the monitored power supply
drops to 0V. The VSEN pin is high impedance and
can be used for application of reset threshold programming.
Moreover, with the built-in reset timeout delay about
800ms, enables the IC remains asserts after the
VSEN has risen above reset threshold or manual
reset is deasserted.
Applications
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Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
„ Telecom/Networking Equipment
The G686/G687 is available in SOT-23-5 packages.
Ordering Information
ORDER
NUMBER
MARKING
TEMP. RANGE
OUTPUT TYPE
PACKAGE
(Green)
G686LT11U
G686HT11U
68FLx
68FHx
-40°C ~ +105°C
-40°C ~ +105°C
Push-Pull Active Low
Push-Pull Active High
SOT-23-5
SOT-23-5
G687LT11U
68GLx
-40°C ~ +105°C
Open Drain
SOT-23-5
Note: T1: SOT-23-5
1: Bonding Code
U: Tape Reel
Pin Configuration
Typical Application Circuit
Detect
Voltage
G686/G687
VCC
* 100kΩ
R1
RESET
(RESET)
1
5
MR
**
VSEN
R2
GND
Manual
Reset
VCC
RESET
(RESET)
2
3
4
MR
GND
VSEN
SOT-23-5
*The 100kΩ pull up resistor is only for G687L
**Adjustable reset threshold voltage is Vth = 0.994 ×
()is for G686H
R1+R2
R2
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
Ver: 0.4
Apr 10, 2012
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