TC1232 Ver la hoja de datos (PDF) - TelCom Semiconductor Inc => Microchip

Número de pieza

componentes Descripción

Fabricante

TC1232

MICROPROCESSOR MONITOR

TelCom Semiconductor Inc => Microchip 

MICROPROCESSOR MONITOR

tPB

PB RST

tPBD

VIL

RST

RST

VIH

tRST

tF

VCC

+4.75V

+4.25V

1

TC1232

2

3

Figure 3. Push-button Reset. The debounced PB RST input

ignores input pulses less than 1msec and is guaranteed

to recognize pulses of 20msec or greater

PUSH-BUTTON RESET

tST

ST

tTD

NOTE:

tTD IS THE MAXIMUM ELAPSED TIME BETWEEN ST HIGH-TO-LOW

TRANSITIONS (ST IS ACTIVATED BY FALLING EDGES ONLY) WHICH

WILL KEEP THE WATCHDOG TIMER FROM FORCING THE RESET

OUTPUTS ACTIVE FOR A TIME OF tRST. tTD IS A FUNCTION OF THE

VOLTAGE AT THE TD PIN, AS TABULATED BELOW.

CONDITON

tTD

MIN

TYP

MAX

TD PIN = 0V

TD PIN = OPEN

TD PIN = VCC

62.5msec

250msec

500msec

150msec

600msec

1200msec

250msec

1000msec

2000msec

Figure 4. Strobe Input

VCC

TELCOM SEMICONDUCTOR, INC.

4

Figure 5. Power-Down Slew Rate

5

tR

+4.75V

6

+4.25V

Figure 6. Power-Up Slew Rate

7

8

5-23

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