ULN2801A
ULN2802A - ULN2803A
ULN2804A - ULN2805A
EIGHT DARLINGTON ARRAYS
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EIGHT DARLINGTONS WITH COMMON EMIT-
TERS
OUTPUT CURRENT TO 500 mA
OUTPUT VOLTAGE TO 50 V
INTEGRAL SUPPRESSION DIODES
VERSIONS FOR ALL POPULAR LOGIC FAMI-
LIES
OUTPUT CAN BE PARALLELED
INPUTS PINNED OPPOSITE OUTPUTS TO
SIMPLIFY BOARD LAYOUT
DIP18
PIN CONNECTION
(top view)
DESCRIPTION
The ULN2801A-ULN2805Aeach contain eight dar-
lington transistors with common emitters and inte-
gral suppression diodes for inductive loads. Each
darlington features a peak load current rating of
600mA (500mA continuous) and can withstand at
least 50V in the off state. Outputsmay be paralleled
for higher current capability.
Five versions are available to simplify interfacing to
standard logic families : the ULN2801A is designed
for general purpose applications with a current limit
resistor ; the ULN2802Ahas a 10.5kΩ input resistor
and zener for 14-25V PMOS ; the ULN2803A has a
2.7kΩ input resistor for 5V TTL and CMOS ; the
ULN2804A has a 10.5kΩ input resistor for 6-15V
CMOS and the ULN2805A is designed to sink a
minimum of 350mA for standard and Schottky TTL
where higher output current is required.
All types are supplied in a 18-lead plastic DIP with
a copperlead from and featurethe convenientinput-
opposite-output pinout to simplify board layout.
September 1997
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STMICROELECTRONICS [ STMICROELECTRONICS ]
