TLE 4278 G

Semiconductor Group

3

1998-11-01

Pin Configuration

(top view)

Figure 1

Pin Definitions and Functions

Pin

Symbol Function

1WO

Watchdog Output; the open collector output is connected to the

5-V output via an integrated resistor of 30 k

Ω.

2WADJ

Watchdog Adjust; an external resistor to GND determine the

watchdog activating threshold.

3, 4, 5,

10, 11, 12

GND

Ground

6D

Reset Delay; connect a capacitor to ground for delay time

adjustment.

7RADJ

Reset Switching Threshold Adjust; for setting the switching

threshold, connect a voltage divider from output to ground. If this

input is connected to ground, the reset is triggered at the internal

threshold.

8WI

Watchdog input; positive-edge-triggered input for monitoring a

microcontroller.

9

V

Q

5-V output voltage; block to ground with min. 10

µF capacitor,

ESR

< 10 Ω at 10 kHz.

13

V

I

Input voltage; block to ground directly on the IC with ceramic

capacitor.

14

RO

Reset output; the open collector output is connected to the

5-V output via an integrated resistor of 30 k

Ω.

RO

GND

RADJ

D

GND

8

W

12

11

GND

GND

1

2

3

4

5

GND

6

7

14

13

WO

WADJ

9

10

AEP02113

GND

V

V

Ι

Ι

Q

P-DSO-14-4