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6551 used in Commodore and Amiga equipment

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
Last update: 10 January 2004