參數(shù)資料
型號: TC32MEDB
廠商: TelCom Semiconductor, Inc.
英文描述: CONNECTOR ACCESSORY
中文描述: ECONOMONITOR - 3針系統(tǒng)的監(jiān)管機構(gòu)與電源監(jiān)視器和看門狗
文件頁數(shù): 3/4頁
文件大?。?/td> 57K
代理商: TC32MEDB
5-5
TELCOM SEMICONDUCTOR, INC.
7
6
5
4
3
1
2
8
TC32M
RS
V
IL
V
IH
V
DD
V
RST
t
RST
t
RPD
Figure 3. Power Up / Down Reset Timing
Figure 1. Watchdog Strobe
Figure 2. RS Pulled Low by Push-button Reset
PB CLOSED
PB OPEN
RS
V
IH
t
RST
V
IL
V
STL
(MAX)
t
ST
t
TD
RS
Note: t
TD
is the maximum elapsed time between strobes which
will keep the watchdog timer from forcing RS LOW.
(A STROBEis defined as a high-to-low transition from V
STH
to V
STL
)
.
V
STH
(MIN)
V
STL
(MIN)
Pin No.
Symbol
Description
1
2
3
GND
V
DD
RS
Ground.
The +5V power supply input.
RESET/STROBE (Bidirectional). The open drain goes active if:
1. V
DD
falls below 4.5V nominal.
2. If pulled low by an external electronic signal or switch closure.
3. If the watchdog is not strobed within the minimum watchdog timeout period.
4. During power-up and power-down.
In the input mode, RS connects to a voltage level shift network (typically a resistor divider
to V
DD
.) The watchdog timer is reset when processor causes a voltage level
V
STL
to be
applied to RS.
The +5V power supply input. (SOT-223 only).
4
V
DD
PIN DESCRIPTION
ECONOMONITOR – 3-PIN SYSTEM SUPERVISOR
WITH POWER SUPPLY MONITOR AND WATCHDOG
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