TC1232 datasheet(6/24 Pages) MICROCHIP

6 / 24 page

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

Type

Buffer/

Driver

Type

Function

8-pin

PDIP,

SOIC

16-pin

SOIC

PB RST

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.

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

TOL

Tolerance Input.

TOL = GND, Max Voltage Trip Point (VCCTP) = 4.75V (5% tolerance)

TOL = VCC, Max Voltage Trip Point (VCCTP) = 4.5V (10% tolerance)

GND

—

The ground reference for the device.

RST

Push

Pull

Reset Output (Active-High)

Goes active (High) if one of these conditions occurs:

If VCC falls below the selected Reset voltage threshold.

If PB RST pin is forced low.

If ST pin is not strobed within the minimum selected time-out period.

(see TD pin)

During power-up.

611

RST

Open

Drain

Reset Output (Active-Low)

Goes active (Low) if one of these conditions occurs:

If VCC falls below the selected Reset voltage threshold.

If PB RST pin is forced low.

If ST pin is not strobed within the minimum selected time-out period.

(see TD pin)

During power-up.

713

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

—

The positive supply (+5V) for the device.

—

1,3,5,

7,10,1

2,16

—

No internal connection.

TC1232 bảng dữ liệu(PDF) 6 Page - Microchip Technology

TC1232 bảng dữ liệu(HTML) 6 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

bảng dữ liệu tải về

Link URL