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Last update: 10 January 2004

IC number:6551
IC function:ACIA (Asynchronous Communication Interface Adapter)
Related components:1488, 75188 (quad line drivers), 1489, 75189 (quad line receivers)

Component documentation
IC numberManufacturerDocumentation
MPS6551, MCS6551MOS Technology / CSGNot available
SY6551SynertekNot available

Component versions
IC numberPackageSpeedCBM part numberCBM part description
MCS655128-pin Ceramic DIP1 MHz901895-01IC, 6551, ACIA
MPS655128-pin Plastic DIP1 MHz
MCS6551A28-pin Ceramic DIP2 MHz901895-026551A 2 MHz
MPS6551A, SYP6551A28-pin Plastic DIP2 MHz
MCS6551B28-pin Ceramic DIP3 MHz901895-036551A
MPS6551B28-pin Plastic DIP3 MHz

Positions
DevicePositionsPackageSpeed
A2232U52, U54, U56, U58, U72, U74, U76DIP2 MHz
Plus/4U3DIP2 MHz
SuperPET BMB boardU23DIP1 MHz
SuperPET combo boardU40DIP1 MHz
CBM II lo-profileU15DIP2 MHz
CBM II hi-profileU7DIP2 MHz

Pinout
PinTypeName
1PowerGND
2InputCS0
3Input_CS1
4Input_RES
5I/ORxC
6..7InputXTAL1..XTAL2
8Output_RTS
9Input_CTS
10OutputTxD
11Output_DTR
12InputRxD
13..14InputRS0..RS1
15PowerVCC
16Input_DCD
17Input_DSR
18..25I/ODB0..DB7
26Output_IRQ
27Inputø2
28InputR/_W

Copyright © 2003-2004 Ronald van Dijk - All rights reserved