SLRS027G − DECEMBER 1976 − REVISED JUNE 2004
ULN2001A, ULN2002A, ULN2003A, ULN2004A, ULQ2003A, ULQ2004A
HIGH VOLTAGE HIGH CURRENT
The ULN2001A is obsolete
DARLINGTON TRANSISTOR ARRAY
and is no longer supplied.
description/ordering information (continued)
The ULN2001A is a general-purpose array and can be used with TTL and CMOS technologies. The ULN2002A
is designed specifically for use with 14-V to 25-V PMOS devices. Each input of this device has a Zener diode
and resistor in series to control the input current to a safe limit. The ULN2003A and ULQ2003A have a 2.7-kΩ
series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices. The
ULN2004A and ULQ2004A have a 10.5-kΩ series base resistor to allow operation directly from CMOS devices
that use supply voltages of 6 V to 15 V. The required input current of the ULN/ULQ2004A is below that of the
ULN/ULQ2003A, and the required voltage is less than that required by the ULN2002A.
logic diagram
9
1B
1
16
COM
1C
2B
2
15
2C
3B
3
14
3C
4B
4
13
4C
5B
5
12
5C
6B
6
11
6C
7B
7
10
7C
2
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