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Motorola MC68882CFN16A
- Part No.:
- MC68882CFN16A
- Manufacturer:
- Motorola
- Category:
- Specialized ICs
- Package:
- 68-LCC (J-Lead)
- Description:
- IC FLOATING-POINT CO-PROC 68PLCC
- Quantity:
Unit Price:$0
Ext Price:$0
- Payment:
- Shipping:
Product Details
MC68882CFN16A - Floating-Point Coprocessor
MC68882CFN16A is a Motorola M68000-family floating-point coprocessor order code. Motorola's archived orderable-parts list identifies this suffix as an extended-temperature device in a 68-lead plastic leaded chip carrier.
Confirm the full suffix, actual lot and clock rating before substitution.
Overview
The MC68882 adds IEEE 754 floating-point arithmetic to M68000-family systems. Motorola designed it primarily for the MC68020 and MC68030 coprocessor interface. Its eight 80-bit floating-point registers and arithmetic unit execute the family floating-point instruction set while the host processor handles bus transactions.
Key Advantages
IEEE arithmetic
Implements the binary floating-point standard used by the M68000 software model.
Dedicated registers
Eight 80-bit floating-point data registers support extended-precision calculations.
Host integration
Uses the MC68020/MC68030 coprocessor interface for instruction execution.
Software continuity
Motorola documents MC68881 pin and software compatibility at the device-family level.
Feature Summary
Instruction set
Motorola lists 46 floating-point instructions, including arithmetic and transcendental functions.
Arithmetic core
The technical summary describes a 67-bit arithmetic unit and 67-bit barrel shifter.
Data formats
Supports integer, single, double, extended and packed-decimal operand formats.
Bus options
The family documentation describes 8-, 16- and 32-bit host data-bus connections.
Package & Footprint
The Motorola orderable-parts list specifies a 68-lead plastic quad pack (PLCC) for MC68882CFN16A. LCDChip records 68-LCC (J-Lead), and the package register maps it to 68-LCC.jpg. The local JPG is missing; mechanical and artwork verification remain open.
- Confirm pin-one orientation against the Motorola PLCC pinout.
- Check the J-lead body and land pattern on the target board.
- Inspect the supplied part marking and lead condition.
Do not publish until the package JPG and footprint match are checked.
Pin Functions
The manufacturer technical summary and pin-out document define a 68-lead PLCC connection. Use their numbered drawing for placement.
Data bus
D0-D31 transfer operands and control information through the configured host bus width.
Address and select
Address, function-code and chip-select signals identify coprocessor bus cycles.
Bus control
Read/write, data-strobe and acknowledge pins synchronize transfers.
Clock and power
Clock, reset, supply and ground pins require the specified electrical conditions.
Verify every pin number and the selected bus width in the original pinout before a board change.
Key Specifications
| Order code | MC68882CFN16A |
|---|---|
| Manufacturer | Motorola Semiconductor |
| Function | Floating-point coprocessor |
| Processor family | M68000, primarily MC68020/MC68030 |
| Arithmetic standard | ANSI-IEEE 754-1985 binary floating point |
| Clock class | 16 MHz order code; verify timing grade on supplied lot |
| Temperature designation | Extended-temperature order code; exact range requires lot documentation |
| Package | 68-lead plastic leaded chip carrier |
| Floating-point registers | Eight, 80-bit each |
| Arithmetic unit | 67-bit |
| Instruction count | 46 |
| Host data-bus options | 8, 16 or 32 bits, configuration dependent |
Consult the Motorola electrical and ordering tables for system timing and environmental limits.
Replacement Considerations
The MC68881 is documented as pin- and software-compatible at the family level, but performance and timing differ. A standard-temperature FN16A is not automatically equivalent to the extended-temperature CFN16A. Confirm bus wiring, clock grade, temperature, package, electrical conditions and firmware expectations. No unverified internal alternative link is included.
Manufacturer Information
Motorola's MC68882 technical summary, hosted by successor NXP, supplies the architecture and interface details. An archived Motorola orderable-parts list names the exact MC68882CFN16A suffix as a 68-lead PLCC extended-temperature coprocessor. NXP marks the MC68882 family discontinued; review traceability for legacy stock.
Applications
M68020 systems
Hardware floating-point execution through the coprocessor interface.
M68030 systems
Floating-point arithmetic in compatible embedded computers.
Numeric processing
Legacy scientific, control and graphics calculations requiring IEEE formats.
Service inventory
Qualified replacement for installed boards designed for this exact order code.
Quality & Authenticity
Inspect manufacturer marking, complete CFN16A suffix, date and lot code, J-lead condition, storage and supply-chain traceability. This listing does not claim current manufacture, electrical retest or a particular certification.
FAQ
What does the MC68882 do?
It executes M68000-family floating-point operations using dedicated registers and arithmetic hardware.
Is CFN16A the same as FN16A?
No. The archived order list distinguishes CFN as an extended-temperature variant.
Is MC68881 a direct replacement?
The family is pin- and software-compatible, but system timing and performance still require review.
Is package artwork available?
No. The registered 68-LCC.jpg is absent locally.
Engineering Notice
Keep the detail under review until the exact CFN16A environmental grade, supplied-lot marking, package JPG, footprint and current qualified distributor price are verified. Do not publish while any check remains open.
MC68882CFN16A Information
- Specifications
- Tags
- Product attributes
- Attribute value
- Manufacturer:
- Motorola
- Series:
- -
- Package/Case:
- 68-LCC (J-Lead)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Floating-Point Co-Processor
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 68-PLCC (24.21x24.21)
- Grade:
- -
- Qualification:
- -
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