The eight NPN Darlington-connected transistors in this family of arrays are ideally suited for interfacing between low logic level digital circuitry (such as TTL, CMOS, or PMOS/NMOS) and the higher current/voltage requirements of lamps, relays, printer hammers, or other similar loads for a broad range of computer, industrial, and consumer applications. All devices feature open–collector outputs and free-wheeling clamp diodes for transient suppression.
ULN2804 Pinout
ULN2804 Pin Configuration
PIN NO
PIN NAME
DESCRIPTION
1
1B
Input Pin1B
2
2B
Input Pin 2B
3
3B
Input Pin 3B
4
4B
Input Pin 4B
5
5B
Input Pin 5B
6
6B
Input Pin 6B
7
7B
Input Pin 7B
8
8B
Input Pin 8B
9
GND
Ground Pin
10
COM
Common Pin
11
8C
Output Pin 8C
12
7C
Output Pin 7C
13
6C
Output Pin 6C
14
5C
Output Pin 5C
15
4C
Output Pin 4C
16
3C
Output Pin 3C
17
2C
Output Pin 2C
18
1C
Output Pin 1C
ULN2804 SOP-18 BJT – Bipolar Transistor Integration Features
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