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參數(shù)資料
| 型號： | G692 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 4-Pin UP Voltage Monitors with Manual Reset Input |
| 中文描述： | 4引腳的電壓，帶有手動復位輸入監(jiān)視器 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 171K |
| 代理商： | G692 |
Ver: 1.0
Sep 23, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G692/G693
Global Mixed-mode Technology Inc.
Pin Description
PIN
1
NAME
GND
FUNCTION
Ground
RESET
(G693L/G692L)
RESET
(G692H)
MR
RESET
Output remains low while V
CC
is below the reset threshold, and for at least 140ms after
V
CC
rises above the reset threshold.
RESET Output remains high while V
CC
is below the reset threshold, and for at least 140ms after
V
CC
rises above the reset threshold.
Manual Reset Input. A logic low on
MR
asserts reset. Reset remains asserted as long as
MR
is
low and for
at
least 140ms after
MR
returns high, This active-low input has an internal 20k
pull-
up resistor. It can be driven from a TTL or CMOS-logic line, or shorted to ground with a switch.
Leave open if unused.
Supply Voltage (+5V, +3.3V, +3.0V)
2
3
4
V
CC
Detailed Description
A microprocessor’s (μP’s) reset input starts the μP in a
known state. The G693L/G692L/G692H assert reset to
prevent code-execution errors during power-up,
power-down, or brownout conditions. They assert a
reset signal whenever the V
CC
supply voltage declines
below a preset threshold, keeping it asserted for at
least 140ms after V
CC
has risen above the reset
threshold. The G693L uses an open-drain output, and
the G692L/G692H have a push-pull output stage. Con-
nect a pull-up resistor on the G693L’s RESET output to
any supply between 0 and 5.5V.
The manual reset input (
MR
) can also initiate a reset.
See the Manual Reset Input Section.
Manual Reset Input
Many μP-based products require manual reset capabil-
ity, allowing the operator, a test technician, or external
logic circuitry to initiate a reset. A logic low on
MR
as-
serts reset. Reset remains asserted while
MR
is low,
and for the Reset Active Timeout Period (t
RP
) after
MR
returns high. This input has an internal 20k
pull-up resistor, so it can be left open if it is not used.
MR
can be driven with TTL or CMOS-logic levels, or
with open-drain / collector outputs. Connect a normally
open momentary switch from
MR
to GND to create a
manual-reset function; external debounce circuitry is
not required. If
MR
is driven from long cables or if the
device is used in a noisy environment, connecting a
0.1μF capacitor from
MR
to ground provides additional
noise immunity.
Figure 1.Maximum Transient Duration Without
Causing a Reset Pulse vs. Reset Com-
parator Overdrive
Figure2.
RESET
Valid to V
CC
= Ground Circuit
V
CC
RESET
GND
G692
100k
R1
0
100
200
300
400
500
600
1
10
100
1000
Reset Comparator Overdrive, V
TH
-V
CC
(mV)
M
u
s
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| G692H | 4-Pin UP Voltage Monitors with Manual Reset Input |
| G693 | 4-Pin UP Voltage Monitors with Manual Reset Input |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| G692H | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Pin UP Voltage Monitors with Manual Reset Input |
| G693 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Pin UP Voltage Monitors with Manual Reset Input |
| G693L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Pin UP Voltage Monitors with Manual Reset Input |
| G696 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Microprocessor Reset IC |
| G696_06 | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Microprocessor Reset IC |
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