G686 Datasheet, PDF (1/1 Pages) Global Mixed-mode Technology Inc – Low Voltage Reset IC

Global Mixed-mode Technology
G686/G687
Low Voltage Reset IC
Features
„ Monitor Supply Voltages of ±2% Reset Thresh-
old 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
Applications
„ Computers
„ Controllers
„ Intelligent Instruments
„ Critical µP and µC Power Monitoring
„ Portable/Battery-Powered Equipment
„ Telecom/Networking Equipment
General Description
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 sup-
ply 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 pro-
gramming.
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.
The G686/G687 is available in SOT-23-5 packages.
Ordering Information
ORDER
NUMBER
G686LT11U
G686HT11U
G687LT11U
Note: T1: SOT-23-5
1: Bonding Code
U: Tape Reel
MARKING
68FLx
68FHx
68GLx
TEMP. RANGE
-40°C ~ +105°C
-40°C ~ +105°C
-40°C ~ +105°C
OUTPUT TYPE
Push-Pull Active Low
Push-Pull Active High
Open Drain
PACKAGE
(Green)
SOT-23-5
SOT-23-5
SOT-23-5
Pin Configuration
Typical Application Circuit
RESET ¹
(RESET)
GND 2
G686/G687
5 MR
VCC 3
SOT-23-5
()is for G686H
4 VSEN
Ver: 0.4
Apr 10, 2012
Detect
Voltage
R1
**
R2
Manual
Reset
VCC
VSEN
RESET
(RESET)
MR
GND
* 100kΩ
*The 100kΩ pull up resistor is only for G687L
**Adjustable reset threshold voltage is V_th = 0.994 × ^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: [phone]
http://www.gmt.com.tw
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