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參數(shù)資料
| 型號： | G681 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Tantalum Molded Capacitor; Capacitance: 1.5uF; Voltage: 16V; Case Size: 3.2x1.6 mm; Packaging: Tape & Reel |
| 中文描述： | 微處理器復(fù)位IC |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 101K |
| 代理商： | G681 |
Ver: 03 Preliminary
Jan 25 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G680/G681
Global Mixed-mode Technology Inc.
Microprocessor Reset IC
Features
High
±
2% Voltage Threshold Accuracy
Independently Adjustable High- and Low-
Voltage Thresholds
Fully Specified Over Temperature
Available in Three Output Configurations
Push-Pull RESET Output (G680L)
Push-Pull RESET Output (G680H)
Open-Drain RESET Output (G681L)
140ms min Power-On Reset Pulse Width
4μA Supply Current
Power Supply Transient Immunity
5-Pin SOT23-5 Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable / Battery-Powered Equipment
Automotive
General Description
The G680/G681 are microprocessor (μP) supervisory
circuits used to monitor the power supplies in μP and
digital systems. High- and Low- voltage thresholds can
be adjusted independently, allowing for wide hystere-
sis. Voltage detection thresholds are accurate to 2%.
These circuits perform a single function: they assert a
reset signal whenever the V
CC
supply voltage declines
below the low-voltage threshold, keeping it asserted
for at least 140ms after V
CC
has risen above the
high-voltage threshold.
The G681L has an open-drain output stage, while the
G680 have push-pull outputs. The G681L’s open-drain
RESET
output requires a pull-up resistor that can be
connected to a voltage higher than V
CC
. The G680L
have an active-low RESET
output, while the G680H
has an active-high RESET output. The reset com-
parator is designed to ignore fast transients on thresh-
old input.
The IC’s power supply is separate from the detector
inputs, allowing the G680/G681 to be powered from a
down-stream supply. Low supply current (4μA, typical)
makes the G680/G681 ideal for use in portable
equipment. The G680/G681 are available in 5 pin SOT
23-5 packages.
Ordering Information
PART
G680H(L)T1
G681LT1
TEMP. RANGE
-40°C ~ +105°C
-40°C ~ +105°C
PIN-PACKAGE
SOT23-5
SOT23-5
Pin Configuration Typical Operating Circuit
Vcc
RESET(RESET)
SOT23-5
5
4
1
HTH
2
3
GND
LTH
G680/G681
() is for G680H
INPUT
GND
μP
V
CC
GND
G680/G681
V
CC
R
PULL-UP
V
CC
*
*G681 ONLY
HTH
LTH
RESET
(RESET)
RESET
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