TA8030S/F
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8030S,TA8030F
WATCHDOG TIMER
The TA8030S TA8030F is a system reset IC for 5V supply
voltage system. It is specially designed for microcomputer systems.
It incorporates a watchdog timer for monitoring microcomputer
operation and has many reset functions, including a reset timer
output which will be given at power-on and another reset output
which will be given when the supply voltage drops. With these
functions, it helps build up a reliable system.
TA8030S
FEATURES
l Watchdog timer
l Power-on reset timer
l Dual-reset output
l SIP7 PIN
SOP8 PIN
TA8030F
(TA8030S)
(TA8030F)
Weight
SIP7- P-2.54A
SOP8- P-225-1.27
1
: 0.7g (typ.)
: 0.08g (typ.)
2002-02-27
TA8030S/F
PIN DESCRIPTION
PIN No.
TA80305
TA8030F
SYMBOL
DESCRIPTION
1
1
WD
Clock input pin for watchdog timer. If this IC is only used as a power-on reset timer, this
pin is connected to RST1 .
2
2
TC
Time setting pin for the reset and watchdog timers. R1 leads to VCC, and C1 leads to
GND.
3
3
RST1
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.
4
4
GND
Grounded
5
6
ADJ
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.
6
7
VCC
Power supply pin for internal circuit. The output voltage can also be detected at this pin.
7
8
RST2
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.
―
5
NC
Not connected pin.(Electrically,this pin is completely open.)
3
2002-02-27
