MC68302FC20C

The MC68302FC20C is a one-chip microprocessor integrating an industry-standard MC68000/MC68008 core with a dedicated communications processor and system integration block. This 20 MHz device combines general-purpose processing and a flexible communications architecture suited to networking and communications products.

Designed for applications that require concurrent protocol handling and compact system integration, the MC68302FC20C targets ISDN equipment, data concentrators, modems, line cards, bridges and gateways by delivering on-chip communications controllers, memory, timing and system-control features to simplify board-level design.

Key Features

• Core & Architecture  MC68000/MC68008 microprocessor core combined with a separate RISC communications processor (CP) for handling communications tasks.
• Performance  20 MHz operating speed with a 1-core, 8/16-bit bus architecture; available options in the series include 16, 20, 25 and 33 MHz devices.
• Power & I/O  5 V I/O voltage and support for standard surface-mount assembly in a 132-pin PQFP (46 × 46 mm) package.
• Communications Engines  Three Serial Communications Controllers (SCCs) and two Serial Management Controllers (SMCs) supporting protocols such as HDLC/SDLC, Bisync, UART and others; flexible physical interfaces including IDL, GCI, PCM and NMSI operation.
• DMA & Data Handling  Independent Direct Memory Access (IDMA) controller, six serial DMA channels for SCCs, and the ability to buffer multiple frames without M68000 core intervention.
• On-Chip Memory & DRAM Support  On-chip 1,152-byte dual-port RAM and an integrated DRAM refresh/controller plus four programmable chip-select lines with wait-state logic.
• System & Reliability  Interrupt controller with two modes, three timers including a software watchdog, hardware watchdog for bus activity monitoring, programmable address mapping, and freeze control for peripheral debugging.
• Operating Conditions & Packaging  Surface-mount 132-PQFP package (46×46 mm) with an operating temperature range of 0 °C to 70 °C and RoHS compliance.

Typical Applications

• ISDN Equipment  Configurable communications channels and protocol support make the device suitable for ISDN basic rate and terminal adapter designs.
• Data Concentrators  Integrated DMA, multi-channel SCCs and buffering capabilities help aggregate and forward data streams with minimal external logic.
• Modems and Line Cards  On-chip communications processors and serial interfaces simplify line interface implementations and protocol handling.
• Network Bridges & Gateways  Combined processing and communications blocks enable concurrent protocol operation and packet management in bridging and gateway functions.

Unique Advantages

• Highly integrated one-chip solution: Combines an MC68000/MC68008 core, communications processor, system integration block and on-chip RAM to reduce external component count and PCB complexity.
• Flexible communications support: Multiple SCCs, SMCs and DMA channels support a broad set of serial protocols and physical interfaces for diverse network designs.
• Efficient data handling: Dedicated serial DMA channels and on-chip dual-port RAM allow multi-buffer/frame operations without continuous host-core intervention.
• Built-in system control and reliability features: Watchdog timers (software and hardware), interrupt modes, freeze control and DRAM refresh simplify robust system design and debug.
• Standard packaging and mounting: 132‑pin PQFP (46×46 mm) surface-mount package supports industry-standard assembly practices and thermal handling.

Why Choose MC68302FC20C?

The MC68302FC20C positions itself as a compact, integrated processor for embedded communications designs that require both general-purpose processing and dedicated communications resources. Its combination of an MC68000-class core, RISC communications processor, multi-channel serial controllers, DMA and on-chip memory provides a balanced platform for products that must manage multiple protocols and high I/O integration.

This device is suitable for designers developing ISDN gear, data concentration, modem and network interface products who need a reliable, well-integrated component with offload capability for protocol handling and streamlined board-level integration.

Request a quote or submit a product inquiry to receive pricing and availability information for the MC68302FC20C and to discuss how it fits your design requirements.