NXP Semiconductors MC68EN360AI33L

Overview

MC68EN360AI33L from Freescale Semiconductor is a 32-bit integrated communications controller (QUICC™) combining CPU32+ core, System Integration Module (SIM60), and Communications Processor Module (CPM). It delivers 4.5 MIPS at 25 MHz, supports four SCCs, two SMCs, one SPI, dual TDM buses, and Ethernet/IEEE 802.3 on SCC1 - used in industrial gateways, T1/E1 bridges, and protocol-conversion routers.

For engineers reviewing the MC68EN360AI33L datasheet, MC68EN360AI33L pinout, MC68EN360AI33L application, or MC68EN360AI33L equivalent, key selection criteria include its 240-pin PQFP package, 0–25 MHz operation, slave mode support for MC68040 companion systems, and RAM-based microcode programmability for HDLC, PPP, and AppleTalk protocols.

Technical Context

The MC68EN360AI33L implements a split-processor architecture: the CPU32+ core handles general-purpose execution while the RISC-based CPM offloads serial protocol processing - enabling concurrent HDLC, UART, SPI, and TDM operations without CPU intervention. Its 2.5-Kbyte dual-port RAM serves as shared memory between CPU and CPM for buffer descriptor management.

It features dynamic bus sizing (8/16/32-bit), IEEE 1149.1 JTAG test access, spurious interrupt monitoring, and a clock synthesizer supporting 0–25 MHz operation across industrial temperature range (–40°C to +85°C). The SIM60 includes periodic interrupt timer, software watchdog, and low-power stop mode - all configurable via dedicated registers.

Key Specifications

Pinout & Package

MC68EN360AI33L is housed in a 240-pin Plastic Quad Flat Pack (PQFP) with 20-mil pitch, designed for surface-mount assembly and industrial thermal cycling. Pin functions are multiplexed across address/data bus, serial I/O, chip selects, and CPM-specific control signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC68360RC25, MC68EN360AI33L offers Ethernet-ready SCC1 microcode and finer-pitch PQFP for compact layouts; versus MPC860T, it preserves M68K toolchain compatibility and delivers proven CPM determinism for time-critical serial protocol stacks - making it optimal for cost-sensitive, long-lifecycle industrial communications upgrades.

Availability

MC68EN360AI33L is available at Aetrix Electronics and suitable for industrial protocol gateways, T1/E1 channel banks, multi-protocol routers, and legacy network bridges requiring stable component supply and long-term obsolescence management.

Supply support for MC68EN360AI33L 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) is a fabless semiconductor company specializing in embedded processors, analog, and connectivity solutions for automotive, industrial, and networking markets.

The MC68EN360AI33L belongs to the QUICC™ family - designed specifically for deterministic, low-latency serial protocol processing in communications infrastructure equipment where CPU offload and multi-standard flexibility are critical.

FAQ

What is the operating temperature range for the MC68EN360AI33L?

The MC68EN360AI33L is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the MC68360 Package/Frequency Availability table, where the "EN" suffix denotes the extended temperature grade. The device maintains full 25 MHz operation across this range, with validated timing margins for all serial interfaces including SCC1 Ethernet mode and dual TDM buses. MC68EN360AI33L uses the same silicon die as MC68360EM25 but with extended thermal qualification.

Does the MC68EN360AI33L support Ethernet functionality out of the box?

Yes, the MC68EN360AI33L includes factory-programmed microcode enabling IEEE 802.3 10-Mbps Ethernet on SCC1 - a feature explicitly reserved for "EN"-suffix parts per the product brief. Unlike standard MC68360 variants, MC68EN360AI33L ships with Ethernet-capable firmware preloaded in on-chip ROM, requiring only an external PHY or transformer for physical layer compliance. No runtime microcode download is needed to activate Ethernet mode on MC68EN360AI33L.

How does the MC68EN360AI33L differ from the base MC68360 in terms of pinout and packaging?

The MC68EN360AI33L uses the same 240-pin PQFP package as MC68360EM25 but with 20-mil pitch (vs. 25-mil on older MC68302), and shares identical pin mapping per the MC68360 User's Manual. The "EN" designation indicates both extended temperature rating and inclusion of Ethernet microcode - not a pinout revision. All signal names, electrical characteristics, and multiplexing behavior match the MC68360 family specification; no PCB redesign is required when upgrading from MC68360EM25 to MC68EN360AI33L.

Can the MC68EN360AI33L operate in slave mode with an external host processor?

Yes, the MC68EN360AI33L supports full slave mode operation, allowing the CPU32+ core to be disabled while the CPM, SIM60, and peripherals remain fully functional under control of an external master - such as an MC68EC040 in companion mode. In this configuration, MC68EN360AI33L handles all serial protocol processing, DMA transfers, and system protection duties, acting as an intelligent communications co-processor. The slave mode is enabled via the SIM60 configuration register and requires no external logic.

What types of memory interfaces does the MC68EN360AI33L support?

The MC68EN360AI33L supports asynchronous memory interfaces including SRAM, EPROM, Flash EPROM, and DRAM - with dedicated CAS, WE, and OE controls. It provides four chip select outputs, boot CS with 8/16/32-bit memory width selection, and a full DRAM controller in SIM60 supporting RAS/CAS multiplexing, refresh timing, and burst modes. Memory bus width is dynamically configurable (8/16/32-bit), and MC68EN360AI33L maintains compatibility with standard JEDEC timing parameters for all supported devices.