2987

8-CHANNEL

SOURCE DRIVER

8-CHANNEL SOURCE DRIVER

WITH OVER-CURRENT PROTECTION

Providing over-current protection for each of its eight sourcing

outputs, the UDN2987A and UDN2987LW drivers are used as an

interface between standard low-level logic and relays, motors, sole-

noids, LEDs, and incandescent lamps. The device includes thermal

shutdown and output transient protection/clamp diodes for use with

sustaining voltages to 35 V.

In these drivers, each channel includes a latch to turn OFF that

channel if the maximum channel current is exceeded. All channels are

disabled if the thermal shutdown is activated. A common FAULT

output is used to indicate either chip thermal shutdown or any over-

current condition. All outputs are enabled by pulling the common OE/

R input high. When OE/R is low, all outputs are inhibited and the eight

latches are reset.

Under normal operating conditions, each of eight outputs will

source in excess of 100 mA continuously at an ambient temperature of

25

°C and a supply of 35 V. The over-current fault circuit will protect

the device from short-circuits to ground with supply voltages of up to

35 V.

The inputs are compatible with 5 V and 12 V logic systems—TTL,

Schottky TTL, DTL, PMOS, and CMOS. In all cases, the output is

switched ON by an active high input level. The UDN2987A is supplied

in a 20-pin dual in-line plastic package; the UDN2987LW is supplied in

a 20-lead small-outline plastic package.

FEATURES

s 350 mA Output Source Current

s Over-Current Protected

s Internal Ground Clamp Diodes

s Output Breakdown Voltage 35 V, Minimum

s TTL, DTL, PMOS, or CMOS Compatible Inputs

s Internal Thermal Shutdown

s Automotive Capable

Always order by complete part number:

Part Number

Package

UDN2987A

20-Pin DIP

UDN2987LW

20-Lead Wide-Body SOIC

Note that the UDN2987A (DIP) and the UDN2987LW

(SOIC) are electrically identical and share a common

terminal number assignment.

Dwg. PP-067

V

S

1

2

3

4

5

6

7

8

14

15

16

17

18

19

20

9

10

11

12

13

GROUND

OUT

IN

FAULT

OE/R

1

OE

FF

x8

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

OUT 8

1

IN 2

IN 3

IN 4

IN 5

IN 6

IN 7

IN 8

2987

ABSOLUTE MAXIMUM RATINGS

Continuous Output Current,

Package Power Dissipation,

Operating Temperature Range,

Storage Temperature Range,

* Outputs are disabled at approximately -500 mA

per driver.