8243 I/O Expander – Datasheet

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The 8243 is an input/output device specifically designed to furnish input/output expansion capabilities for the INS8048, INS8049, and NSB050 single-chip microcomputer family. The 8243 is fabricated using XMOSTM (high-density N-channel silicon gate) technology operates from a single 5V supply and is TTL compatible. It is housed in a 24- pin, dual-in-line package and provides high drive current capabilities at low cost.

8243 Pinout

8243 Pin Configuration

Pin NoPin NameDescription
1P50Port Pin 50
2P40 Port Pin 40
3P41 Port Pin 41
4P42 Port Pin 42
5P43 Port Pin 43
6CS’Chip Select
7PROGPrograming Pin
8P23 Port Pin 23
9P22 Port Pin 22
10P21 Port Pin 21
11P20 Port Pin 20
12GNDGround Pin
13P70Port Pin 70
14P71 Port Pin 71
15P72 Port Pin 72
16P73 Port Pin 73
17P63 Port Pin 63
18P62 Port Pin 62
19P61 Port Pin 61
20P60 Port Pin 60
21P53 Port Pin 53
22P52 Port Pin 52
23P51 Port Pin 51
24VCCSupply Voltage

8243 Key Features

  • XMOS technology
  • Single 5V supply
  • Low cost 1/0 expansion
  • Easy interface with INS8048/49/50 microcomputers
  • High fanout capability
  • 24-Pin DIP
  • Direct extension of IB048/49/50 1/O ports

You can download this datasheet for 8243 I/O Expander – Datasheet from the link given below: