| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... |
MM54C922
|
218Kb / 10P |
16, 20-Key Encoder
|
 Fairchild Semiconductor |
MM74C922
|
114Kb / 10P |
16-Key Encoder 20-Key Encoder
|
 Quantum Research Group |
QT60248
|
867Kb / 28P |
16, 24 KEY QMATRIX ICs
|
 Princeton Technology Co... |
PT2240B
|
73Kb / 3P |
Encoder IC
|
 Rohm |
BU1850MUV
|
414Kb / 18P |
GPIO Expander IC
|
|
BU8272GUW
|
391Kb / 18P |
GPIO Expander IC
|
 Princeton Technology Co... |
PT2240B
|
279Kb / 8P |
Encoder IC
|
 Fairchild Semiconductor |
MM74C923WMX
|
131Kb / 11P |
16-Key Encoder ??20-Key Encoder
|
|
MM74C922WMX
|
131Kb / 11P |
16-Key Encoder 20-Key Encoder
|
 Princeton Technology Co... |
PT4203
|
495Kb / 4P |
Encoder IC
|