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Motorola MC68882RC50A coprocessor

A pin grid array (PGA) version, similar to one used in the Macintosh IIx and IIfx.

The Motorola 68882 math coprocessor is a floating-point unit (FPU) that was produced by Motorola's Semiconductor Products Sector for use with the Motorola 68020 or 68030 processor.[1]


Motorola MC68882FN25A coprocessor

A plastic leaded chip carrier (PLCC) version, similar to one used in the Macintosh IIcx, IIci, and some high-end 68030 PowerBooks.

The 68882 succeeded the Motorola 68881 math coprocessor and featured improved pipelining. The 68881 and 68882 are actually interchangeable between the 68020 and 68030, with 10% performance improvement observed in the 68882.[2]

Macintosh models with 68882 coprocessors[]

Pin grid array (PGA) version:

Plastic leaded chip carrier (PLCC) version:

Includes a socket for an optional PLCC version:

Third party manufacturers also produced cards with coprocessor sockets for the Macintosh IIsi and 68030-based Macintosh LC series computers that did not have a socket.


  1. Section 1: Generation Description by Motorola, MC68881/MC68882 Floating-Point Coprocessor User's Manual p.1-1. 1987.
  2. Frequently Asked Questions (FAQ) by Robert Boys, comp.sys.m68k. 1996-01-06.

External links[]

Motorola 68k series processors
Central processing units : 68000 · 68010 · 68020 · 68030 · 68040 · 68050 · 68060
Floating-point units :   (n/a)  ·   (n/a)  · 68881 · 68882 · (SANE)
Memory management units :   (n/a)  · 68451 · 68851
Other :                           (VI475)
Superseded by PowerPC processors in March 1994
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