1
MOTOROLA ANALOG IC DEVICE DATA
The ULN2068B is a high–voltage, high–current quad Darlington switch
array designed for high current loads, both resistive and reactive, up to 300 W.
It is intended for interfacing between low level (TTL, DTL, LS and 5.0 V
CMOS) logic families and peripheral loads such as relays, solenoids, dc and
stepping motors, multiplexer LED and incandescent displays, heaters, or other
high voltage, high current loads.
The Motorola ULN2068B is specified with minimum guaranteed breakdown
of 50 V and is 100% tested for safe area using an inductive load. It includes
integral transient suppression diodes. Use of a predriver stage reduces input
current while still allowing the device to switch 1.5 Amps.
It is supplied in an improved 16–Pin plastic DIP package with heat sink
contact tabs (Pins 4, 5, 12 and 13). A copper alloy lead frame allows maximum
power dissipation using standard cooling techniques. The use of the contact
tab lead frame facilitates attachment of a DIP heat sink while permitting the
use of standard layout and mounting practices.
• TTL, DTL, LS, CMOS Compatible Inputs
• 1.5 A Maximum Output Current
• Low Input Current
• Internal Freewheeling Clamp Diodes
• 100% Inductive Load Tested
• Heat Tab Copper Alloy Lead Frame for Increased Dissipation
MAXIMUM RATINGS (T
A
= 25°C and ratings apply to any one device in the
package, unless otherwise noted)
Rating
Symbol Value Unit
Output Voltage V
O
50 V
Input Voltage (Note 1) V
I
15 V
Supply Voltage V
S
10 V
Collector Current (Note 2) I
C
1.75 A
Input Current (Note 3) I
I
25 mA
Operating Ambient Temperature Range T
A
0 to +70 °C
Storage Temperature Range T
stg
–55 to +150 °C
Junction Temperature T
J
150 °C
NOTES: 1. Input voltage referenced to ground.
2. Allowable output conditions shown in Figures 11 and 12.
3. May be limited by max input voltage.
Partial Schematic
C
3.0 k
7.2 k
R
S
0.9 k
B
R
in
2.5 k
V
S
K
