Datasheet

5

Rev. 1.1, 2009-08-27

TLE4678

Pin Configuration

3

Pin Configuration

3.1

Pin Assignment PG-DSO-14

Figure 2

Pin Assignment PG-DSO-14 Package

3.2

Pin Definitions and Functions PG-DSO-14

Pin

Symbol

Function

1WO

Watchdog Output

Open collector output with an internal pull-up resistor to the output Q.

An additional external pull-up resistor to the output Q is optional.

Leave open if the watchdog function is not needed.

2WADJ

Watchdog Activating Threshold Adjust

An external resistor to GND determines the watchdog activating threshold.

Connect directly to GND for disabling the watchdog.

Connect directly to GND if the watchdog function is not needed.

Connect to output Q via 270 k

Ω resistor for permanently activating the watchdog.

3, 4, 5,

10, 11, 12

GND

IC Ground

Interconnect the GND pins on PCB.

Connect to heat sink area.

6D

Reset Delay and Watchdog Timing

Connect a ceramic capacitor D (pin 6) to GND for reset delay and watchdog timing

adjustment.

Leave only open if both, the reset and the watchdog function are not needed.

7RADJ

Reset Switching Threshold Adjust

For reset threshold adjustment connect to a voltage divider from output Q to GND.

For triggering the reset at the internally determined threshold, connect this pin directly to

GND.

Connect directly to GND if the reset function is not needed.

Pinout_SO14 .vsd

1

GND

2

GND

3

D

14

13

12

GND

GND

4

11

Q

GND

GND

10

9

8

5

6

7WI

I

RO

WADJ

WO

RADJ