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G698H438T1U 参数 Datasheet PDF下载

G698H438T1U图片预览
型号: G698H438T1U
PDF下载: 下载PDF文件 查看货源
内容描述: 微处理器复位IC [Microprocessor Reset IC]
分类和应用: 电源电路电源管理电路微处理器光电二极管
文件页数/大小: 8 页 / 185 K
品牌: GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
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Global Mixed-mode Technology Inc.
G698/G699
Microprocessor Reset IC
Features
Precision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
General Description
The G698/G699 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 V
CC
supply voltage declines
below a preset threshold, with hysteresis keeping it
asserted for time delay determined by externally pro-
grammable time delay generator after V
CC
has risen
above the reset threshold. Reset thresholds suitable
for operation with a variety of supply voltages are
available.
The G699L has an open-drain output stage, while the
G698 have push-pull outputs. The G699L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than V
CC
. The G698L
have an active-low RESET output, while the G698H
has an active-high RESET output. The reset com-
parator is designed to ignore fast transients on V
CC
,
and the outputs are guaranteed to be in the correct
logic state for V
CC
down to 0.8V.
Low supply current makes the G698/G699 ideal for
use in portable equipment. The G698/G699 are avail-
able in 5-pin SOT23-5 packages.
Fully Specified Over Temperature
Available in Three Output Configurations
Push-Pull RESET Output (G698L)
Push-Pull RESET Output (G698H)
Open-Drain RESET Output (G699L)
Externally Programmable Time Delay Generator
14µA Supply Current
Guaranteed Reset Valid to V
CC
= 0.8V
Power Supply Transient Immunity
5 pin SOT23-5 Packages
2% Threshold Accuracy
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable / Battery-Powered Equipment
Automotive
Ordering Information
ORDER NUMBER TEMP. RANGE
G698H(L)xxxT1U
G699LxxxT1U
-40°C ~ +105°C
-40°C ~ +105°C
PACKAGE
SOT23-5
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
V
CC
CD
1
5
VCC
VCC
R
pull-up*
VCC
GND
2
G698/G699
G698/G699
CD
RESET
(RESET)
GND
C
D
µP
RESET
INPUT
GND
GND
3
SOT23-5
4
RESET
(RESET)
()is for G698H
*G699 ONLY
Ver: 1.3
Jun 03, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
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