CS80C86 - 16-Bit 5 MHz CMOS Microprocessor | Harris
Référence : CS80C86 ✗ Fin de vieCS80C86 Présentation
A microprocessor is a programmable semiconductor that executes central processing unit functions, including instruction decoding, arithmetic and logic operations, addressing, interrupt handling, and control of data movement. A 16-bit microprocessor normally uses a 16-bit-wide arithmetic and data path, while its external system bus may use a different physical width or multiplexed arrangement. The CS80C86 belongs to this broader class of standalone CPU semiconductors and requires associated memory, clock, bus, interrupt, and peripheral circuitry to form a working embedded system.
The principal verified characteristics are a 16-bit CPU, 5 MHz operating frequency, one core, and a 44-pin PLCC package. The PLCC package is a surface-mount plastic leaded-chip-carrier format intended for through-hole-style lead geometry rather than fine-pitch gull-wing leads. Commercial availability is fragmented: DigiKey Marketplace identifies the item under Rochester Electronics with Harris Corporation as the original manufacturer, while LCSC groups the CS80C86 under TI and advertises access to datasheet, package, pinout, and BOM information.
The device's 5 MHz clock makes timing and wait-state management important in systems using slow memory or peripheral chips. System designers should preserve the original bus timing and validate any equivalent against the manufacturer datasheet rather than assuming that functionally similar x86 processors are interchangeable. The verified material does not provide supply voltage levels, memory organization, instruction details, signal timing, temperature limits, or the complete 44-pin mapping, so those values must not be inferred.
Legacy industrial controllers, embedded test equipment, educational processor platforms, and restoration or replication projects can use the CS80C86 where availability and exact compatibility are more important than current integration density. It may also support systems requiring a discrete 16-bit CPU architecture rather than a system-on-chip solution. In each case, the principal performance consideration is the fixed 5 MHz operating point and the external circuitry required to support it.
Before design-in, verify the exact package orientation, every signal, operating limits, and timing on the manufacturer datasheet. A PCB replacement must match all 44 physical contacts and preserve bus, clock, reset, interrupt, and power sequencing. Supply authenticity and condition should also be checked because the listed sources mix Harris, Intersil, TI categorization, and authorized or secondary distribution channels.
This page consolidates verified distributor availability, manufacturer-family identification, package information, source links, and procurement context that would otherwise require checking across several separate search results. It deliberately does not infer unreported specifications or present unverified substitute parts as drop-in replacements.
Alternatives de remplacement direct pour CS80C86 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesCS80C86 Valeurs maximales et caractéristiques électriques
| Product Type | 16-bit CMOS microprocessor |
| Processor Core | 1 core |
| Data Width | 16 bit |
| Clock Frequency | 5 MHz |
| Process Technology | Self-aligned silicon-gate CMOS, Scaled SAJI IV |
| Package Type | PLCC |
| Nombre de broches | 44 pins |
| Package Dimensions | 16.58 mm x 16.58 mm |
| Style de montage | Surface mount |
| Manufacturer | Harris Corporation |
| Datasheet Manufacturer | Intersil Corporation |
Guide de configuration des broches du CS80C86 16.58 mm x 16.58 mm
Configuration des broches du CS80C86 (boîtier 16.58 mm x 16.58 mm). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour CS80C86.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
CS80C86 convient pour 6 applications: Legacy Industrial Control, Processor Education Platform, Legacy Equipment Restoration, Embedded Test Equipment, Industrial Communication Gateway, Legacy System Replication.
Legacy Industrial Control
The CS80C86 fits legacy industrial-control platforms that were designed around a discrete 5 MHz, 16-bit processor and already use a 44-pin PLCC footprint. It can preserve processor timing and bus behavior in a machine controller when redesigning to a modern MCU would alter the board and software environment. The performance consideration is its fixed legacy operating point: designers must retain compatible memory and peripheral timing, including any required wait states, rather than assuming contemporary embedded speed. Because the verified data does not state voltage or temperature limits, it should not be introduced into safety-critical or harsh-environment equipment without full qualification.
Recommandé
Processor Education Platform
The CS80C86 is appropriate for a laboratory platform intended to teach discrete microprocessor architecture because it combines a 16-bit data path, one processor core, and a 5 MHz operating point in a 44-pin PLCC package. Students can study CPU bus activity, reset, interrupt, and memory interfacing without confusing the processor with a highly integrated microcontroller. The design consideration is board support: external memory, clock, bus-control, and peripheral circuitry must match the verified timing data. Use the Intersil datasheet as the authoritative reference and avoid relying on reconstructed pinouts from marketplace diagrams.
Recommandé
Legacy Equipment Restoration
CS80C86 is useful when restoring an older controller whose CPU was removed or damaged and whose PCB cannot be redesigned without disrupting existing routing. The 5 MHz processor and 44-pin PLCC package identify a clear mechanical target, but successful restoration depends on sourcing an authentic, traceable device and confirming all electrical ratings. Restoration teams should compare device markings, supply rails, clock behavior, and bus waveforms with known-good documentation. The key limitation is that the verified excerpts do not provide the complete 44-pin map or operating limits, so power-system and thermal validation are mandatory before returning equipment to service.
Recommandé
Embedded Test Equipment
The CS80C86 can be integrated into a legacy test-equipment controller when the original board architecture, timing, and component sourcing are retained. Its 16-bit organization is appropriate for control code and instrument coordination, while the 5 MHz clock establishes the timing basis that firmware and peripheral circuits must follow. A modern controller may simplify future development, but migrating requires board changes and software validation. For repair-oriented systems, the processor's primary advantage is architectural continuity rather than performance; engineers should characterize bus timing and bus contention before substituting any newer device.
Recommandé
Industrial Communication Gateway
CS80C86 can serve as the legacy processing core in a communication gateway designed around an existing x86-compatible controller and PLCC PCB. The 5 MHz operating point may be sufficient for supervisory logic, protocol handling, and status monitoring when the original firmware and hardware are preserved. The tradeoff is integration: the CS80C86 needs external support circuitry and offers no verified integrated networking interface in the supplied data. Interface choices such as RS-232, RS-485, or Ethernet therefore depend on the board architecture and should be validated independently rather than assumed from processor selection.
Recommandé
Legacy System Replication
The CS80C86 is a practical choice for building a documented replica of a legacy 16-bit controller when its 5 MHz behavior and 44-pin PLCC interface must remain faithful to the original hardware. Replication benefits from continuity of processor timing, bus organization, and diagnostic procedures, especially for firmware recovery or failure analysis. It does not simplify the design because external memory, clock generation, bus control, and interrupt handling remain necessary. Engineers should preserve the original schematic and probe known-good waveforms, then compare the replica against them to separate assembly errors from processor or memory faults.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CS80C86 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Brand | Harris Corporation |
| Package | 44-pin PLCC, 16.58 mm x 16.58 mm |
| Product Type | 16-bit CMOS microprocessor |
| Processor Cores | 1 core |
| Data Width | 16 bit |
| Clock Frequency | 5 MHz |
| Process Technology | Self-aligned silicon-gate CMOS, Scaled SAJI IV |
| Verified Unit Price | $2.9070 as of 2026-10-23 |
| Availability Signal | LCSC listing reports in stock as of 2026-10-23 |
Principaux différenciateurs
- Verified legacy processor identity (vs No verified drop-in alternative)
- Documented original package and frequency (vs Unverified generic 8086 alternatives)
- Traceable commercial sourcing context (vs Unqualified marketplace inventory)
Notes de conception
Do not treat another 8086-family processor as a substitute solely because its instruction set appears similar. A genuine board-level replacement must match the 44-pin PLCC footprint, each signal direction, power levels, clock behavior, bus timing, interrupt sequencing, and reset requirements. The targeted cross-reference results did not identify a qualified drop-in part, so any proposed substitute must be checked against the Intersil datasheet and tested at the system level.
Preserve the original CS80C86 footprint, pin-1 orientation, and lead pattern before copying a board. Because the verified excerpts do not contain a complete 44-pin mapping, engineers must derive every connection from the manufacturer documentation rather than a marketplace image. Keep the processor, clock source, memory, and bus-routing topology consistent with the reference design to avoid introducing timing skew, contention, or address-decoding errors.
Treat the 5 MHz CS80C86 environment as a timing-design exercise rather than applying modern high-speed layout rules indiscriminately. Verify address, data, control, interrupt, and ready or wait-state timing on the assembled board with an oscilloscope or logic analyzer. The supplied data does not include rise-time, bus-timing, output-loading, or propagation-delay values, so those electrical details must come from the manufacturer datasheet before release to production.
Informations de conformité
The supplied search results do not contain an exact-part environmental or material compliance declaration. Automotive qualification is not indicated for this legacy microprocessor. Obtain original manufacturer or authorized-distributor documentation before making compliance claims.
