Intel 8087 floating-point unit family

Intel 8087 co-processors were fabricated in two package types - ceramic side-brazed DIP and hermetic DIP (CerDIP), designed to operate in the following temperature ranges:
  • Commercial temperature range for parts with C, D, QC and QD prefixes.
  • Industrial temperature range for parts with LC, LD, TC and TD prefixes.
  • Military temperature range for parts with MC and MD prefixes.

There were a few different speed grades of Intel 8087 co-processors ranging from 4 MHz to 10 MHz.

Production floating-point units

Intel C8087 4MHZ ES
4 MHz
40-pin ceramic DIP

Engineering sample
Intel C8087
5 MHz
40-pin side-brazed ceramic DIP
Intel MC8087/B
5 MHz
40-pin ceramic DIP
Intel TC8087
5 MHz
40-pin ceramic DIP
Intel D8087
5 MHz
40-pin ceramic DIP
Intel C8087-1
10 MHz
40-pin side-brazed ceramic DIP
Intel D8087-1
10 MHz
40-pin ceramic DIP
Intel C8087-2
8 MHz
40-pin side-brazed ceramic DIP
Intel MC8087-2/B
8 MHz
40-pin ceramic DIP
Intel QC8087-2
8 MHz
40-pin ceramic DIP
Intel D8087-2
8 MHz
40-pin ceramic DIP
Intel C8087-3
5 MHz
40-pin side-brazed ceramic DIP
Intel C8087-4
40-pin side-brazed ceramic DIP
Comments

USSR-made i8087 clone

2006-10-10 15:19:34
Posted by: Sergei Frolov

Thi is the USSR-made i8087 clone FPU.
Very rare item.

KM1810BM87

Sergei Frolov
frs@overlink.[n0spam]ru

USSR-made i8087 clone

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At a glance

Type:
16-bit floating-point unit
Introduction:
1980
Frequency (MHz):
5 - 10
Sockets:
DIP40