Renesas CP80C86-2Z

Overview

CP80C86-2Z from Intersil is a static CMOS 16-bit microprocessor compatible with the NMOS 8086, operating at up to 8 MHz in DC–8 MHz range, supporting 1 MByte direct memory addressing and 24 operand addressing modes, used in legacy industrial control and embedded computing systems requiring TTL-compatible, low-power CPU operation.

For engineers reviewing the CP80C86-2Z datasheet, CP80C86-2Z pinout, CP80C86-2Z application, or CP80C86-2Z equivalent, this page delivers verified functional identity, minimum/maximum mode bus interface behavior, static operation support, RoHS-compliant 40-pin PDIP packaging, and validated alternative options for legacy system sustainment and redesign.

Technical Context

The CP80C86-2Z implements a dual-unit architecture with a Bus Interface Unit (BIU) handling instruction prefetching into a 6-byte FIFO queue and address relocation, and an Execution Unit (EU) performing ALU operations and flag management. It supports two operational modes: minimum mode (MN/MX = VCC) for single-processor systems using ALE, DEN, DT/R, and maximum mode (MN/MX = GND) for multiprocessor configurations coordinated by an external 82C88 bus controller.

Its static CMOS design enables true DC operation with clock stop capability, zero-refresh internal latches, and frequency-scaled power consumption - ICCOP = 10 mA/MHz typical and ICCSB ≤ 500 µA max - while maintaining full TTL-level compatibility except on CLK input, which requires asymmetric 33% duty cycle timing.

Key Specifications

Pinout & Package

CP80C86-2Z is housed in a 40-lead plastic dual-in-line package (PDIP), RoHS-compliant per drawing E40.6, with through-hole mounting and wave-solder-only processing. Pin 1 is bottom-left corner when notch faces up; pin 40 is top-right.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microprocessor applications.

Compared with CP80C86-2Z, MD80C86-2/883 offers extended temperature and screening at the cost of package form factor and procurement complexity, while 8405202QA provides identical functionality in SMT format - neither is pin-compatible with CP80C86-2Z's PDIP footprint, requiring PCB redesign for substitution.

Availability

CP80C86-2Z is available at Aetrix Electronics and suitable for industrial PLC controllers, legacy test equipment firmware, avionics maintenance simulators, and ruggedized data loggers requiring stable component supply across extended product lifecycles.

Supply support for CP80C86-2Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Intersil Corporation (now part of Renesas Electronics) specialized in high-reliability analog and mixed-signal ICs, with deep heritage in industrial and military-grade microprocessors and interface solutions.

The 80C86 product line was designed as a radiation-tolerant, low-power CMOS upgrade path for NMOS 8086-based systems, targeting long-lifecycle embedded applications where static operation, wide temperature margins, and binary compatibility were critical.

FAQ

What is the maximum operating frequency of the CP80C86-2Z?

The CP80C86-2Z is rated for a maximum clock frequency of 8 MHz, as specified in the FN2957 Rev 5.00 datasheet. This applies across its full 0°C to +70°C operating range and reflects guaranteed timing performance for all instructions and bus cycles. The device supports static operation, meaning it functions correctly down to DC, but 8 MHz represents its upper validated limit for reliable instruction execution and memory interface timing.

Is CP80C86-2Z pin-compatible with the original NMOS 8086?

The CP80C86-2Z maintains identical pinout and electrical signaling (except CLK input) with the NMOS 8086, enabling direct PCB-level replacement in most minimum-mode systems. However, the CLK input requires an asymmetric 33% duty cycle - unlike the 8086's 50% requirement - so clock generation circuitry must be verified or adjusted before substitution.

Does CP80C86-2Z support both minimum and maximum mode operation?

Yes, CP80C86-2Z supports both modes via the MN/MX pin (pin 33): tied high for minimum mode (self-contained control signals like ALE, DEN, DT/R), or tied low for maximum mode (requires external 82C88 bus controller). The functional diagram and pin descriptions in FN2957 confirm full dual-mode implementation, including distinct status pin behaviors (S0–S2 vs. M/IO, WR) and RQ/GT arbitration support.

What is the purpose of the TEST pin on CP80C86-2Z?

The TEST pin (pin 23) is sampled synchronously by the WAIT instruction: if TEST is LOW, execution resumes; if HIGH, the CP80C86-2Z enters an idle state until TEST goes LOW. This enables simple hardware handshaking - for example, connecting TEST to a peripheral ready signal - without requiring interrupt latency or polling overhead, making it valuable for deterministic low-level firmware control.

Can CP80C86-2Z be used in reflow soldering processes?

No - CP80C86-2Z is explicitly designated for through-hole wave solder processing only, as stated in Note 2 of the Ordering Information section in FN2957. Its Pb-free PDIP package uses materials qualified for wave solder peak temperatures, not reflow profiles. Attempting reflow may damage the package or compromise solder joint integrity due to thermal mismatch and moisture sensitivity.