TC32M TELCOM [TelCom Semiconductor, Inc], TC32M Datasheet - Page 3

• Manufacturer Part Number: TC32M
• Description: ECONOMONITOR - 3-PIN SYSTEM SUPERVISOR WITH POWER SUPPLY MONITOR AND WATCHDOG
• Manufacturer: TELCOM [TelCom Semiconductor, Inc]

ECONOMONITOR™ – 3-PIN SYSTEM SUPERVISOR
WITH POWER SUPPLY MONITOR AND WATCHDOG
PIN DESCRIPTION
Pin No.
V
V
V
Note: t
will keep the watchdog timer from forcing RS LOW.
(A STROBE is defined as a high-to-low transition from V
STL
STL
STH
1
2
3
4
TELCOM SEMICONDUCTOR, INC.
(MAX)
(MIN)
(MIN)
TD
RS
RS
is the maximum elapsed time between strobes which
Figure 2. RS Pulled Low by Push-button Reset
V
IL
PB CLOSED
Figure 1. Watchdog Strobe
Symbol
GND
t
V
V
RS
ST
DD
DD
t
t
RST
TD
PB OPEN
Ground.
The +5V power supply input.
RESET/STROBE (Bidirectional). The open drain goes active if:
In the input mode, RS connects to a voltage level shift network (typically a resistor divider
to V
applied to RS.
The +5V power supply input. (SOT-223 only).
Description
1. V
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.
DD
V
.) The watchdog timer is reset when processor causes a voltage level
DD
IH
STH
falls below 4.5V nominal.
to V
STL
)
.
V
V
RS
DD
RST
Figure 3. Power Up / Down Reset Timing
t
RPD
V
IL
t
RST
V
V
STL
TC32M
IH
to be
5-5
1
2
3
4
5
6
7
8