FA80486SXSF33

The FA80486SXSF33 is an Intel486 SX series embedded microprocessor featuring a 32‑bit single core running at 33 MHz. It combines the Intel486 architecture with on‑chip cache and bus features tailored for embedded and retrofit designs that require binary compatibility with established i486 software.

Designed for surface‑mount board implementations, the device provides system‑level features such as dynamic bus sizing, parity generation/checking and boundary scan to aid integration, testability and interoperability in commercial embedded applications.

Key Features

• Core — Intel486 SX 32‑bit single core operating at 33 MHz.
• On‑chip Memory & Prefetch — 8‑Kbyte write‑through cache and a 32‑byte code queue prefetcher to improve instruction throughput; four internal write buffers and support for burst bus cycles.
• Bus & Data Integrity — 32‑bit data bus with dynamic bus sizing for 8‑ and 16‑bit devices, plus data bus parity generation and checking.
• Testability — Boundary scan (JTAG) support for board‑level testing and diagnostics.
• Package & Mounting — 176‑lead TQFP (24 × 24 mm) surface‑mount package suitable for compact PCB layouts.
• Electrical & Environmental — I/O voltage: 3.3 V; commercial grade operation from 0 °C to 85 °C; RoHS compliant.

Typical Applications

• Embedded systems — Integration into compact, surface‑mount embedded designs that require a 32‑bit Intel486 architecture.
• Legacy software support — Deployments that need binary compatibility with an established i486 software base.
• Industrial and commercial equipment — Controller and instrumentation applications operating within a 0 °C to 85 °C commercial temperature range.
• Board‑level upgrades and refurbishments — Replacement or retrofit of existing systems using TQFP‑packaged i486 processors.

Unique Advantages

• Binary compatibility with an established software base — Facilitates reuse of existing i486‑targeted code and toolchains for faster deployment.
• On‑chip cache and prefetch — 8‑Kbyte write‑through cache and 32‑byte code queue help improve instruction fetch efficiency at 33 MHz.
• Flexible system interfacing — Dynamic bus sizing and burst bus cycles enable integration with mixed 8/16/32‑bit peripherals and memories.
• Manufacturing test support — Boundary scan (JTAG) simplifies board‑level testing and diagnostics during production.
• Compact, surface‑mount footprint — 176‑TQFP (24×24) package supports dense PCB layouts and automated assembly.
• Commercial readiness — 3.3 V I/O, 0 °C to 85 °C operating range and RoHS compliance align the device to many commercial embedded programs.

Why Choose FA80486SXSF33?

FA80486SXSF33 delivers a well‑documented Intel486 SX architecture in a compact 176‑TQFP surface‑mount package, combining 32‑bit processing, on‑chip cache and system‑level features that simplify integration and board test. Its binary compatibility with the large i486 software base makes it a practical option for embedded designs and legacy system maintenance where proven software assets must be retained.

This commercial‑grade, RoHS‑compliant part is suited to developers and procurement teams targeting reliable, compact embedded processors with clear electrical and thermal bounds (3.3 V I/O, 0 °C to 85 °C) and support for board‑level testability via boundary scan.

Request a quote or submit an RFQ to start the procurement process for FA80486SXSF33 and evaluate how this Intel486 SX‑based MPU fits into your embedded or retrofit design requirements.