2540
UDN2540B
OUT
4
K
OUT
3
GROUND
GROUND
OUT
2
K
OUT
1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN
4
IN
3
ENABLE
GROUND
GROUND
V
CC
IN
2
IN
1
QUAD DARLINGTON
POWER DRIVER
Combining AND logic gates and inverting high-current bipolar
outputs, the UDN2540B and A2540SLB quad Darlington power drivers
provide interface between low-level signal-processing circuits and
power loads totaling 360 W. Each of the four independent outputs can
sink up to 1.8 A in the on state with peak inrush currents to 2.5 A. The
four power outputs are each comprised of an open-collector Darlington
driver and an internal flyback/clamp diode for switching inductive
leads. They feature a minimum breakdown and sustaining voltage of
50 V. The logic inputs are compatible with TTL and 5 V CMOS logic
systems.
Typical applications include print heads, relays, solenoids, and
dc stepping motors. These drivers can also be used to drive high-
current incandescent lamps, LEDS, and heaters. A similar device,
specifically intended for driving a unipolar stepper motor in the
two-phase drive format, is the UDN2544B.
The UDN2540B is supplied in a 16-pin batwing power DIP; the
A2540SLB is supplied in a 20-lead batwing power SOIC for surface-
mount applications. The batwing construction provides for maximum
package power dissipation in a standard construction. At 25擄C, and
with only 1 sq. in. of copper foil at the ground tabs, either package is
capable of safely dissipating more than 2 W.
Data Sheet
29317C
Dwg. PP-017-2
ABSOLUTE MAXIMUM RATINGS
at T
A
= 25擄C
Output Voltage, V
OUT
...........................
50 V
Output Current, I
OUT
(peak) ................
2.5 A
(continuous) ..................................
1.8 A
Logic Supply Voltage, V
CC
..................
7.0 V
Input Voltage, V
IN
................................
7.0 V
Package Power Dissipation,
P
D
........................................
See Graph
Operating Temperature Range,
T
A
..................................
-20
擄
C to +85
擄
C
Storage Temperature Range,
T
S
................................
-55
擄
C to +150
擄
C
FEATURES
I
I
I
I
I
I
1.8 A Continuous Output Current
Output Voltage to 50 V
TTL and 5 V CMOS Compatible Inputs
Efficient Input/Output Pinning
Integral Transient-Suppression Diodes
Replaces L6221A and L6221CD
Always order by complete part number:
Part Number
Package
UDN2540B
16-pin batwing DIP
A2540SLB
20-lead batwing SOIC
1
2
3
4
5
6
7
8
