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参数资料
| 型号： | G684 |
| 厂商： | Global Mixed-mode Technology Inc. |
| 元件分类： | 复位半导体 |
| 英文描述： | Microprocessor Reset IC |
| 中文描述： | 微处理器复位IC |
| 文件页数： | 1/7页 |
| 文件大小： | 181K |
| 代理商： | G684 |
Ver: 1.2
Jun 03, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G684/G685
Global Mixed-mode Technology Inc.
Microprocessor Reset IC
Features
Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
Fully Specified Over Temperature
Available in Three Output Configurations
Push-Pull RESET Output (G684L)
Push-Pull RESET Output (G684H)
Open-Drain RESET Output (G685L)
14A Supply Current
Guaranteed Reset Valid to VCC = 0.8V
Power Supply Transient Immunity
5 pin SOT23-5 Packages
2% Threshold Accuracy
Applications
Computers
Controllers
Intelligent Instruments
Critical P and C Power Monitoring
Portable / Battery-Powered Equipment
Automotive
General Description
The G684/G685 are microprocessor (P) supervisory
circuits used to monitor the power supplies in P 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, with hysteresis after VCC has
risen above the reset threshold. Reset thresholds
suitable for operation with a variety of supply voltages
are available.
The G685 has an open-drain output stage, while the
G684 have push-pull outputs. The G685L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than VCC. The G684L
have an active-low RESET output, while the G684H
has an active-high RESET output. The reset com-
parator is designed to ignore fast transients on VCC,
and the outputs are guaranteed to be in the correct
logic state for VCC down to 0.8V.
Low supply current makes the G684/G685 ideal for
use in portable equipment. The G684/G685 are avail-
able in 5-pin SOT23-5 packages.
Ordering Information
ORDER NUMBER TEMP. RANGE
PACKAGE
G684H(L)xxxT1U
-40°C ~ +105°C
SOT23-5
G685LxxxT1U
-40°C ~ +105°C
SOT23-5
Note: T1 : SOT23-5
U : Tape & Reel
* xxx specifies the threshold voltage.
e.g. 263 denotes the 2.63V threshold voltage.
Pin Configuration
Typical Application Circuit
SOT23-5
G684/G685
5
1
2
RESET
(RESET)
N.C.
4
3
GND
()is for G684H
*G685 ONLY
RESET
INPUT
GND
P
VCC
RESET
(RESET)
GND
G684/G685
VCC
V
CC
R
pull-up*
VCC
GND
SOT23-5
G684/G685
5
1
2
RESET
(RESET)
N.C.
4
3
GND
()is for G684H
*G685 ONLY
RESET
INPUT
GND
P
VCC
RESET
(RESET)
GND
G684/G685
VCC
V
CC
R
pull-up*
VCC
GND
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