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TC1232 Datasheet(PDF) 6 Page - Microchip Technology

No. de pieza TC1232
Descripción Electrónicos  Microprocessor Monitor
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1232 Datasheet(HTML) 6 Page - Microchip Technology

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TC1232
DS20001370E-page 6
 2002-2014 Microchip Technology Inc.
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLES
Pin No.
Symbol
Pin
Type
Buffer/
Driver
Type
Function
8-pin
PDIP,
SOIC
16-pin
SOIC
1
2
PB RST
I
ST
Push Button Reset Input.
Input for a Manual Reset Switch. This input debounces (ignores) pulses
less than 1 ms in duration and is ensured to recognize inputs of 20 ms or
greater.
L = Manual Reset Switch is Active, Force RST/RST pins Active
H = Manual Reset Switch is Inactive. State of RST/RST pins determined by
other system conditions.
2
4
TD
I
ST
Time Delay Input.
The voltage level on this input determines the Watchdog Timer Time-out
period.
TD = 0V
 t
TD = 150 ms
TD = Open
 t
TD = 600 ms
TD = VCC
 t
TD = 1.2s
3
6
TOL
I
ST
Tolerance Input.
TOL = GND, Max Voltage Trip Point (VCCTP) = 4.75V (5% tolerance)
TOL = VCC, Max Voltage Trip Point (VCCTP) = 4.5V (10% tolerance)
4
8
GND
P
The ground reference for the device.
59
RST
O
Push
Pull
Reset Output (Active-High)
Goes active (High) if one of these conditions occurs:
1.
If VCC falls below the selected Reset voltage threshold.
2.
If PB RST pin is forced low.
3.
If ST pin is not strobed within the minimum selected time-out period.
(see TD pin)
4.
During power-up.
611
RST
O
Open
Drain
Reset Output (Active-Low)
Goes active (Low) if one of these conditions occurs:
1.
If VCC falls below the selected Reset voltage threshold.
2.
If PB RST pin is forced low.
3.
If ST pin is not strobed within the minimum selected time-out period.
(see TD pin)
4.
During power-up.
713
ST
I
ST
Strobe Input
Input for Watchdog Timer. WDT period determined by state of TD pin
Falling Edge
 Resets Watchdog Timer counter (no time-out)
815
VCC
P
The positive supply (+5V) for the device.
1,3,5,
7,10,1
2,16
NC
No internal connection.


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