TA8041F 데이터 시트보기 (PDF) - Toshiba

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TA8041F

Dual Voltage Regulator with Watchdog Timer

Toshiba 

PIN DESCRIPTION

TA8041F

PIN No. SYMBOL

DESCRIPTION

1

2

5

8

9

11

13

14

16

19

fin

3, 4, 6, 7,

10, 12, 15,

17, 18, 20

RESET

TCM

CK

VIN

EN

VMO

VSO

TCS

SE

WI

GND

Watchdog timer reset pin.

・Generates a reset signal which is determined by the CT2, RT2 combination connected to the TCM

pin.

・Intermittently generates reset pulses if no clock is supplied to the CK pin.The RESET signal is the

output from the collector of an NPN transistor with a pull-up resistor (10kΩ).

Pin for setting a time for the reset timer and watchdog timer. It connects to a resistor RT2 which leads to

VMO and a capacitor CT2 which is grounded.

Clock input pin for the watchdog timer. If it is used for a power-on reset timer only, it is pulled up to

VMO.

Power supply pin for both main and sub power supplies.

Enable pin for ON / OFF control of the main power output. The main output is 5V when the signal at this

pin is high ; it is in standby state when the signal is low. It conects to 50kΩ resistor which pulled down to

GND.

Main output pin for 5V constant-voltage power supply. It has a current capacity of up to 250mA. This pin

is also a power supply pin for the reset timer. The ON / OFF control of power supply is possible by

setting EN pin.

Sub output pin for 5V constant-voltage power supply. It has a current capacity of up to 100mA.

Pin for setting a time for the power-on reset timer of sub output. It connects to a resister RT1 which

leads to VMO and a capacitor CT1 which is grounded.It conects to 50kΩ resistor which pulled down to

GND.

Detection voltage select pin for power monitoring :

Low : VTH1 = 4.80V, VTH2 = 4.40V

High : VTH1 = 4.60V, VTH2 = 4.20V

It conects to 50kΩ resistor which pulled down to GND.

Reset detect voltage VTH1 output pin. The reset detect voltage has a hysteresis of 0.2V. It is the output

from the collector of an NPN transistor with a pull-up resistor (10kΩ).

Grounded.

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

3

2002-03-12

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