TA8030F Ver la hoja de datos (PDF) - Toshiba

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TA8030F

WATCHDOG TIMER

Toshiba 

TA8030S/F

PIN DESCRIPTION

PIN No.

TA80305 TA8030F

1

1

2

2

3

3

4

4

5

6

6

7

7

8

―

5

SYMBOL

DESCRIPTION

WD

TC

RST1

GND

ADJ

VCC

RST2

NC

Clock input pin for watchdog timer. If this IC is only used as a power-on reset timer, this

pin is connected to RST1 .

Time setting pin for the reset and watchdog timers. R1 leads to VCC, and C1 leads to

GND.

Supplies an NPN transistor open-collector output.

● Generates a reset signal determined by the CR combination connected to the TC pin.

● Supplies reset pulses intermittently if no clock is given to the WD pin.

Grounded

VCC detect voltage (1) adjusting pin. The detection voltage is 4.6V when this pin is

grounded ; it is 3.5V when this pin is directly connected to VCC.

Power supply pin for internal circuit. The output voltage can also be detected at this pin.

Supplies an NPN transistor open-collector output. It is the output pin for VCC detect

voltage (2) . The detect voltage has a hysteresis of 0.17V.

Not connected pin.(Electrically,this pin is completely open.)

3

2002-02-27

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