NXP Semiconductors MC68EN360AI25VL

Overview

MC68EN360AI25VL from Freescale Semiconductor is a 25 MHz QUICC™ (Quad Integrated Communication Controller) combining CPU32+ core, System Integration Module (SIM60), and Communications Processor Module (CPM) in a single 240-pin PQFP package. It delivers 4.5 MIPS, supports four SCCs (including Ethernet on SCC1), two SMCs, one SPI, dual TDM buses, and operates across –40°C to +85°C industrial temperature range. Used in telecom access equipment, industrial gateways, and protocol-conversion bridges.

For engineers reviewing the MC68EN360AI25VL datasheet, MC68EN360AI25VL pinout, MC68EN360AI25VL application, or MC68EN360AI25VL equivalent, key selection criteria include its integrated CPM for offloading serial protocol handling, 32-bit IMB architecture enabling glueless DRAM/EPROM interfacing, and support for HDLC, UART, AppleTalk, and IEEE 802.3 Ethernet - all confirmed for this exact variant.

Technical Context

The MC68EN360AI25VL implements a split-processor architecture: the CPU32+ core handles general-purpose tasks while the RISC-based CPM independently manages up to seven serial channels (four SCCs, two SMCs, one SPI) via 224 buffer descriptors and dedicated IDMA controllers. Its SIM60 provides clock synthesis, periodic interrupt timer, software watchdog, and IEEE 1149.1 JTAG test access.

It supports dynamic bus sizing (8/16/32-bit), slave mode for MC68040 companion operation, and time-slot assigner logic for independent transmit/receive routing on T1/CEPT/ISDN Primary Rate TDM buses. Boot configuration is selectable via chip select options at reset, with dedicated CAS/WE/OE lines for memory interface.

Key Specifications

Pinout & Package

MC68EN360AI25VL is housed in a 240-pin Plastic Quad Flat Pack (PQFP) with 20-mil lead pitch, designed for surface-mount assembly and industrial thermal cycling. Pin functions are multiplexed across address/data bus, serial I/O, timer inputs, interrupt lines, and system control signals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar communications controller applications.

Compared with MC68EN360RC25, MC68EN360AI25VL offers superior manufacturability in automated SMT lines and better thermal dissipation in compact enclosures; versus MC68360EM25, it adds mission-critical IEEE 802.3 support and extended temperature resilience - directly enabling deployment in outdoor telecom cabinets and industrial control panels.

Availability

MC68EN360AI25VL is available at Aetrix Electronics and suitable for industrial gateways, telecom access nodes, embedded network appliances, and legacy system interposers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC68EN360AI25VL 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

Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and analog/mixed-signal ICs, known for the M68K family and automotive microcontrollers.

The MC68EN360AI25VL belongs to the QUICC™ family - engineered specifically for communications-intensive embedded systems requiring hardware-accelerated serial protocol handling, deterministic real-time response, and integration of CPU, memory control, and multi-channel I/O in one device.

FAQ

What is the primary function of the MC68EN360AI25VL in a system design?

The MC68EN360AI25VL serves as a complete communications controller integrating CPU32+ processing, memory interface, and hardware-accelerated serial protocol handling. In practice, the MC68EN360AI25VL offloads HDLC, UART, Ethernet MAC, and TDM routing tasks from the main application processor - enabling deterministic real-time performance in telecom, industrial, and networking equipment without requiring external protocol ASICs.

Does the MC68EN360AI25VL support IEEE 802.3 Ethernet, and on which channel?

Yes, the MC68EN360AI25VL supports full 10-Mbps IEEE 802.3 Ethernet exclusively on SCC1 - a feature distinguishing it from the base MC68360 and confirmed for the "EN" (Ethernet-enabled) variant. This capability requires an external PHY transceiver (e.g., MC68160) but provides hardware CRC, frame alignment, and buffer descriptor management within the CPM.

What package type and temperature grade does the MC68EN360AI25VL use?

The MC68EN360AI25VL uses a 240-pin Plastic Quad Flat Pack (PQFP) with 20-mil lead pitch and is rated for industrial temperature operation from –40°C to +85°C. The "AI" in the suffix explicitly denotes the industrial temperature grade, and "VL" confirms the PQFP packaging - both verified in Freescale's official MC68360 Package/Frequency Availability table.

How does the CPM in the MC68EN360AI25VL differ from the CP in the earlier MC68302?

The CPM in the MC68EN360AI25VL extends the MC68302's Communications Processor with 224 buffer descriptors (vs. 64), dual independent DMAs, enhanced command set (e.g., Graceful Stop Transmit), and support for seven serial channels. While register-level compatibility is maintained for SCC event/mask/status, the MC68EN360AI25VL's CPM adds TDM time-slot assignment and Ethernet-specific microcode - confirmed in the QUICC Product Brief.

Can the MC68EN360AI25VL operate as a peripheral to a faster host processor?

Yes, the MC68EN360AI25VL supports slave mode and MC68040 companion mode - allowing it to function as an intelligent peripheral to an external host like the MC68EC040. In this configuration, the MC68EN360AI25VL manages DRAM control, serial I/O, interrupts, and watchdog functions while the host CPU handles high-level application logic - verified in the QUICC GLUELESS SYSTEM DESIGN section.