U LN2064B - ULN2066B
ULN2074B - ULN2076B
ULN2068B - ULN2070B
April 1993
50V - 1.5A QUAD DARLINGTON SWITCHES
.
OUTPUT CURRENT TO 1.5 A EACH DAR-
LINGTON
.
MINIMUM BREAKDOWN 50 V
.
SUSTAINING VOLTAGE AT LEAST 35 V
.
INTEGRAL
SUPPRESSION
DIODES
(ULN2064B,
ULN2066B,
ULN2068B
and
ULN2070B)
.
ISOLATED
DARLINGTON
PINOUT
(ULN2074B, ULN2076B)
.
VERSIONS COMPATIBLE WITH ALL POPU-
LAR LOGIC FAMILIES
POWERDI P
12 + 2 + 2
PIN CONNECTIONS AND ORDER CODES
ULN2064B
ULN2066B
ULN2068B
ULN2070B
ULN2074B
ULN2076B
DESCRIPTION
Designed to interface logic to a wide variety of high
current, high voltageloads, thesedeviceseach con-
tain four NPN darlington switches delivering up to
1.5 A with a specified minimum breakdown of 50 V
and a sustaining voltage of 35 V measured at 100
mA. The ULN2064B, ULN2066B, ULN2068B and
ULN2070B contain integral suppression diodes for
inductive loads have common emitters. The
ULN2074B and ULN2076B feature isolated dar-
lington pinouts and are intended for applications
such as emitter follower configurations.Inputsof the
ULN2064B, ULN2068B and ULN2074B are com-
patible with popular 5 V logic families and the
ULN2066B and ULN2076B are compatible with 6-
15 V CMOS and PMOS. Types ULN2068B and
ULN2070Binclude a predriver stageto reduceload-
ing on the control logic.
1/8
SCHEMATIC DIAGRAM
ULN2064B : R
IN
= 350
ULN2066B : R
IN
= 3k
ULN2068B : R
IN
= 2.5k
, R
s
= 900
ULN2070B : R
IN
= 11.6k
, R
s
= 3.4k
ULN2074B : R
IN
= 350
ULN2076B : R
IN
= 3k
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
CEX
Output Voltage
50
V
V
CE(sus)
Output Sustaining Voltage
35
V
I
O
Output Current
1.75
A
V
i
Input Voltage
for ULN2066B 2070B - 2074B - 2076B
for ULN2064B 2068B
30
15
V
V
I
I
Input Current
25
mA
V
s
Supply Voltage
for ULN2068B
for ULN2070B
10
20
V
V
P
tot
Power Dissipation
at T
pins
= 90
C
at T
amb
= 70
C
4.3
1
W
W
T
amb
Operating Ambient Temperature Range
20 to 85
C
T
stg
Storage Temperature
55 to 150
C
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C unless otherwise specified )
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
I
CEX
Output Leakage Current
V
CE
= 50V
T
amb
= 25
C
T
amb
= 70
C
100
500
A
A
1
V
CE(sus)
Collector-emitter Sustaining Voltage
I
C
= 100mA, V
i
= 0.4V
35
V
2
V
CE(sat)
Collector-emitter Saturation Voltage
I
C
= 500mA
I
B
= 625
A
I
C
= 750mA
I
B
= 935
A
I
C
= 1A
I
B
= 1.25mA
I
C
= 1.25A
I
B
= 2mA
1.1
1.2
1.3
1.4
V
V
V
V
3
3
3
3
I
i(on)
Input Current
for ULN2064B and ULN2074B
V
i
= 2.4V
V
i
= 3.75V
for ULN2066B and ULN2076B
V
i
= 5V
V
i
= 12V
for ULN2068B
V
i
= 2.75V
V
i
= 3.75V
for ULN2070B
V
i
= 5V
V
i
= 12V
1.4
3.3
0.6
1.7
4.3
9.6
1.8
5.2
0.55
1.0
0.4
1.25
mA
mA
mA
mA
mA
mA
mA
mA
4
4
4
4
4
4
4
4
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
2/8
ELECTRICAL CHARACTERISTICS (T
amb
= 25
o
C unless otherwise specified ) (continued)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
Fig.
V
i(on)
Input Voltage
V
CE
= 2V, I
C
= 1A
ULN2064B, ULN2074B
ULN2066B, ULN2076B
V
CE
= 2V, I
C
= 1.5A
ULN2064B, ULN2074B
ULN2066B, ULN2076B
ULN2068B
ULN2070B
2
6.5
2.5
10
2.75
5
V
V
V
V
V
V
5
5
5
5
5
5
I
s
Supply Current
for ULN2068B
I
C
= 500mA, V
i
= 2.75V
for ULN2070B
I
C
= 500mA, V
i
= 5V
6
4.5
mA
mA
8
8
t
PLH
Turn-on Delay Time
0.5 V
i
to 0.5 V
o
1
s
t
PHL
Turn-off Delay Time
0.5 V
i
to 0.5 V
o
1.5
s
I
R
Clamp Diode Leakage Current
for ULN2064B-ULN2066B
and ULN2068B-ULN2070B
V
R
= 50 V
T
amb
= 25
C
T
amb
= 70
C
50
100
A
A
6
V
F
Clamp Diode Forward Voltage
for ULN2064B-ULN2066B
and ULN2068B-ULN2070B
I
F
= 1 A
I
F
= 1.5 A
1.75
2
V
V
7
No tes : 1. Input voltage is with reference to the substrate (no connection to any other pins) for the ULN2074B and ULN2076B
reference is ground for all other types.
2. Input current may be limited by maximum allowable input voltage.
TEST CIRCUITS
Figure 1.
Figure 2.
Figure 3.
Figure 4.
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
3/8
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9 : Input Current as a Function of
Input Voltage.
Figure 10 : Input Current as a Function of
Input Voltage.
Figure 11 : Collector Current as a Function of
Input Current.
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
4/8
MOUNTING INSTRUCTIONS
The R
th j-amb
can be reduced by soldering the GND
pins to a suitable copper area of the printed circuit
board (Fig. 12) or to an external heatsink (Fig. 13).
The diagram of Figure 14 shows the maximum dis-
sipable power P
tot
and the R
th j-amb
as a function of
the side "
" of two equal square copper areas hav-
ing a thickness of 35
(1.4 mils).
During soldering the pins temperature must not ex-
ceed 260
C and the soldering time must not be
longer than 12 seconds.
The external heatsink or printed circuit copper area
must be connected to electrical ground.
Figure 12 : Example of P.C. Board Area which is
Used as Heatsink.
Figure 13 : External Heatsink Mounting Example.
Figure 14 : Maximum Dissipable Power and Junc-
tion to Ambient Thermal Resistance
vs. Side "
".
Figure 15 : Maximum Allowable Power Dissipa-
tion vs. Ambient Temperature.
ULN2064B-ULN2066B-ULN2068B-ULN2070B-ULN2074B-ULN2076B
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