TC1232 TelCom Semiconductor, TC1232 Datasheet - Page 5

• Manufacturer Part Number: TC1232
• Description: MICROPROCESSOR MONITOR
• Manufacturer: TelCom Semiconductor

PUSH-BUTTON RESET
MICROPROCESSOR MONITOR
Figure 3. Push-button Reset. The debounced PB RST input
ST
NOTE:
PB RST
RST
RST
TELCOM SEMICONDUCTOR, INC.
t
TRANSITIONS (ST IS ACTIVATED BY FALLING EDGES ONLY) WHICH
WILL KEEP THE WATCHDOG TIMER FROM FORCING THE RESET
OUTPUTS ACTIVE FOR A TIME OF t RST. t TD IS A FUNCTION OF THE
VOLTAGE AT THE TD PIN, AS TABULATED BELOW.
CONDITON
TD IS THE MAXIMUM ELAPSED TIME BETWEEN ST HIGH-TO-LOW
TD PIN = 0V
TD PIN = OPEN
TD PIN = V CC
ignores input pulses less than 1msec and is guaranteed
to recognize pulses of 20msec or greater
t
ST
V
IL
t
PBD
Figure 4. Strobe Input
t
t
PB
TD
62.5msec
250msec
500msec
MIN
150msec
600msec
1200msec
TYP
t
TD
V
IH
t
RST
MAX
250msec
1000msec
2000msec
V
CC
V
CC
Figure 5. Power-Down Slew Rate
Figure 6. Power-Up Slew Rate
+4.75V
+4.25V
t
F
t
R
+4.25V
+4.75V
TC1232
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