5-5

TELCOM SEMICONDUCTOR, INC.

7

6

5

4

3

1

2

8

TC32M

RS

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

RS

will keep the watchdog timer from forcing RS LOW.

(A

V

V

Pin No.

Symbol

Description

1

GND

Ground.

The +5V power supply input.

3

RS

RESET/STROBE (Bidirectional). The open drain goes active if:

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

applied to RS.

The +5V power supply input. (SOT-223 only).

PIN DESCRIPTION

ECONOMONITOR™ – 3-PIN SYSTEM SUPERVISOR

WITH POWER SUPPLY MONITOR AND WATCHDOG