2987
8-CHANNEL
SOURCE DRIVER
2987
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.
20
1
2
3
4
OUT
IN
IN
IN
IN
IN
1
1
19
18
17
OUT
OUT
OUT
2
2
3
4
3
4
5
6
7
8
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.
5
6
16
15
OUT
OUT
5
6
IN
IN
IN
7
8
14
13
12
OUT
OUT
7
8
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.
x8
GROUND
9
FAULT
OE/R
OEN
OE
FF
SENSEN
10
V
S
11
Dwg. PP-067
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.
Note that the UDN2987A (DIP) and the UDN2987LW
(SOIC) are electrically identical and share a common
terminal number assignment.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
FEATURES
Driver Supply Voltage, VS ..................... 35 V
Output Sustaining Voltage, VCE(sus) ...... 35 V
■ 350 mA Output Source Current
■ Over-Current Protected
Continuous Output Current,
IOUT ........................................ -500 mA*
■ Internal Ground Clamp Diodes
■ Output Breakdown Voltage 35 V, Minimum
■ TTL, DTL, PMOS, or CMOS Compatible Inputs
■ Internal Thermal Shutdown
FAULT Output Voltage, VCE ................. 35 V
FAULT Output Current, lC ................. 30 mA
Input Voltage, VIN ................................. 15 V
Package Power Dissipation,
■ Automotive Capable
PD ........................................ See Graph
Operating Temperature Range,
Always order by complete part number:
TA ................................. -20°C to +85°C
Storage Temperature Range,
Part Number
UDN2987A
Package
TS ............................... -55°C to +150°C
20-Pin DIP
* Outputs are disabled at approximately -500 mA
per driver.
UDN2987LW
20-Lead Wide-Body SOIC
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