2985
8-CHANNEL SOURCE DRIVER
1
2
3
4
5
6
7
8
V
S
18
17
16
15
14
13
12
11
GND
Recommended for applications requiring separate logic and load grounds,
load supply voltages to 30 V, and load currents to 250 mA, the UDN2985A
source driver is used as an interface between standard low-power digital logic
and LEDs, relays, and solenoids. The outputs feature saturated transistors for
low collector-emitter saturation voltages.
The UDN2985A driver is for use with 5 V logic systems: TTL, Schottky
TTL, DTL, and CMOS. This device has a minimum output breakdown rating
of 30 V with a minimum output sustaining voltage of 15 V. The output is
switched on by an active-high input level.
Under normal operating conditions, this device can source up to 120 mA
for each of the eight outputs at an ambient temperature of 75°C and a supply
voltage of 15 V. It incorporates input current-limiting resistors and output
transient-suppression diodes.
The UDN2985A source driver is supplied in an 18-pin dual in-line
package. All inputs are on one side of the package, output pins on the other,
to simplify printed wiring board layout.
Data Sheet
29310.2A†
Dwg. No. A-10,243
FEATURES
I
I
I
I
I
TTL, DTL, or CMOS Compatible Inputs
250 mA Output Source Current Capability
Output Transient-Suppression Diodes
30 V Minimum Output Breakdown Voltage
Low Output-Saturation Voltage
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25
°
C
Driver Supply Voltage, V
S
..................
30 V
Continuous Output Current,
I
OUT
........................................
-250 mA
Input Voltage, V
IN
...............................
20 V
Package Power Dissipation,
P
D
..............................................
2.2 W*
Operating Temperature Range,
T
A
...............................
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
...............................
-55
°
C to +150
°
C
*Derate at the rate of 18 mW/°C above
T
A
= 25°C.
PARTIAL SCHEMATIC DIAGRAM
1 of 8 DRIVERS
Dwg. No. DS-1013
Always order by complete part number:
UDN2985A
.
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
