MC68340FE16E - 32-bit MPU 16MHz CPU32 DMA Timer | NXP
MPN: MC68340FE16E ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $17.27 | $17.27 |
| 10 | $16.05 | $160.50 |
| 100 | $14.82 | $1,482.00 |
| 500 | $13.5 | $6,750.00 |
| 1,000 | $12.25 | $12,250.00 |
MC68340FE16E Overview
A microprocessor (MPU) is a single-chip CPU that fetches, decodes, and executes instructions from external memory. The MC68340 belongs to the category hierarchy MPU -> 32-bit microprocessor -> embedded processor -> integrated circuit. Within that taxonomy it sits inside the broader semiconductor family. The CPU32 core maintains object-code compatibility with the M68000 while adding new addressing modes and instruction extensions for embedded use. Integrating the DMA controller and timers on-die reduces external component count, simplifies board layout, and improves determinism in real-time control loops.
Key features of the MC68340FE16E include a 16 MHz maximum CPU clock, two independent DMA channels, dual 16-bit timer modules, a serial communications interface, a 32-bit M68000-compatible CPU32 core, and 16 individually programmable chip-select outputs with wait-state generation. The device supports up to 16 Mbytes of address space through external memory interface and provides a background debug mode for non-intrusive in-circuit development.
Architecturally, the MC68340FE16E uses a von Neumann bus model with a 32-bit internal data path and a 24-bit external address bus. The on-chip peripherals operate as bus masters independent of the CPU, allowing DMA and timer activity to proceed while the core executes user code. This partitioned architecture is typical of mid-1990s integrated MPUs and remains in service for legacy industrial equipment, telecom backplanes, and military/aerospace systems where the CPU32 instruction set has a long software base.
Typical applications include industrial process control, motor drives, telecommunications line cards, point-of-sale terminals, printer controllers, and avionics subsystems. The on-chip DMA and timers make it especially well-suited to deterministic real-time tasks such as stepper motor sequencing and high-speed serial channel handling.
When designing with this device, ensure that the 144-pin CQFP land pattern is correctly tooled; ceramic packages require socketed or soldered mounting with attention to thermal coefficient of expansion. Provide adequate decoupling on each VCC pin and route the external memory bus with matched trace lengths for clean operation above 12 MHz.
Drop-in alternatives for MC68340FE16E — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68340FE16E
✅ Drop-In✓ In Stock
$12.25 / Unit
View Datasheet →MC68340CFE16E
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC68340FE20E
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC68340FE16E Maximum Ratings & Electrical Characteristics
| Core Architecture | CPU32 (M68000-compatible) |
| Data Bus Width | 32-bit internal |
| Address Bus Width | 24-bit external |
| Maximum CPU Clock | 16 MHz |
| Core Count | 1 |
| DMA Channels | 2 (independent) |
| Timer Modules | 2 x 16-bit (TIM1, TIM2) |
| Chip-Select Outputs | 16 (programmable) |
| External Address Space | 16 Mbytes |
| Serial Communications | 1 x SCI (UART) |
| Package | 144-CQFP (26.77 x 26.77 mm) |
| Mounting Type | Surface Mount (ceramic) |
| Supply Voltage | 5 V |
| Background Debug Mode | Yes (BDM) |
MC68340FE16E 144-cqfp (26.77 x 26.77 mm) Pin Configuration Guide
Pin configuration for MC68340FE16E (144-cqfp (26.77 x 26.77 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC68340FE16E.
Refer to the datasheet for full pin configuration.
Typical Applications
MC68340FE16E is suitable for 6 applications: Industrial Process Control, Telecommunications Line Cards, Point-of-Sale Terminals, Motor Drive and Stepper Sequencing, Avionics and Military Subsystems, Legacy Printer and Plotter Controllers.
Industrial Process Control
The MC68340FE16E fits industrial process-control PLCs because it integrates a deterministic 16 MHz CPU32 core with two DMA channels, dual 16-bit timers, and sixteen programmable chip-selects, all on a single 144-CQFP die. Its M68000 instruction set lets engineers reuse decades of legacy ladder-logic and motion-control code. Placed on a backplane alongside opto-isolated I/O, the FE16E runs closed-loop PID at sub-millisecond rates while DMA offloads encoder pulse streams without CPU intervention.
Recommended
Telecommunications Line Cards
The MC68340FE16E is well-suited to telecom line-card applications where its Background Debug Mode (BDM) simplifies field firmware updates and its integrated DMA moves HDLC frames between the on-chip SCI and external TDM buses without CPU overhead. At 16 MHz it can sustain typical 64 kbps voice channel aggregation with margin. The 144-CQFP ceramic package provides the hermeticity and thermal margin demanded by central-office equipment, while the 24-bit address bus supports up to 16 Mbytes of program and buffer memory.
Recommended
Point-of-Sale Terminals
For point-of-sale terminals, the MC68340FE16E delivers just enough MIPS (roughly 2-3 MIPS sustained at 16 MHz) for cash-register firmware while keeping bill of materials low via integrated DMA, timers, and chip-selects. Its M68000 code base has decades of proven POS applications. The 5 V single-supply operation matches the magnetic-stripe reader, keypad matrix, and thermal-printer electronics in the same chassis without complex power sequencing.
Recommended
Motor Drive and Stepper Sequencing
The MC68340FE16E's two 16-bit timers with input-capture and output-compare functions make it a natural fit for stepper and brushless-DC motor sequencing, where deterministic pulse trains must be generated without jitter. At 16 MHz the timers resolve step rates up to several hundred kHz with microsecond accuracy. The integrated DMA can stream acceleration profiles from external SRAM to the timer compare registers, freeing the CPU to handle commutation logic and fault monitoring.
Recommended
Avionics and Military Subsystems
The MC68340FE16E in its ceramic 144-CQFP package (FE suffix) is hermetic and supports the extended temperature grades demanded by avionics LRUs and military embedded subsystems. Its radiation-tolerant process options and long-term availability through Rochester Electronics make it attractive for flight-control, navigation, and weapons-system line-replaceable units where re-qualification cost dominates. The CPU32 instruction set is identical to other M683xx variants used elsewhere on the airframe, simplifying cross-platform software reuse.
Recommended
Legacy Printer and Plotter Controllers
Large-format printer and plotter controllers historically used the MC68340FE16E because its DMA channels can stream rasterized image data from external DRAM to the print head without CPU involvement, while the timers generate the precise step pulses that advance the paper feed. The 24-bit address bus accommodates large bitmap buffers (16 Mbytes), and the integrated SCI talks to host PCs over RS-232 or RS-485. The 5 V supply simplifies the analog print-head driver circuitry.
Recommended
Recommended Products Summary
Engineering reference data for MC68340FE16E — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68340CFE16E | MC68340FE20E |
|---|---|---|---|
| Package | 144-CQFP (26.77 x 26.77 mm) | 144-CQFP (same) | 144-CQFP (same) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Architecture | CPU32 (M68000-compatible) | CPU32 (same) | CPU32 (same) |
| Maximum CPU Clock | 16 MHz | 16 MHz (same) | 20 MHz (+25%) |
| DMA Channels | 2 | 2 (same) | 2 (same) |
| Timer Modules | 2 x 16-bit | 2 x 16-bit (same) | 2 x 16-bit (same) |
| Chip-Select Outputs | 16 | 16 (same) | 16 (same) |
| External Address Space | 16 Mbytes | 16 Mbytes (same) | 16 Mbytes (same) |
| Supply Voltage | 5 V | 5 V (same) | 5 V (same) |
| Background Debug Mode | Yes | Yes | Yes |
Key Differentiators
- Same 144-CQFP package across the family enables inventory flexibility (vs MC68340FE20E)
- Integrated DMA and timers reduce external component count (vs External M68000 CPU with separate DMA chip)
- Ceramic CQFP hermeticity for high-reliability environments (vs MC68340CAB16E (plastic QFP))
Design Notes
Estimated: at 16 MHz and full bus activity, the MC68340FE16E in the 144-CQFP ceramic package dissipates approximately 1.0 to 1.5 W (input values: VCC=5 V, ICC~250 mA typical at 16 MHz per the Freescale user's manual). With the ceramic CQFP thermal resistance around 25-30 C/W, junction temperature increases roughly 30-45 C above ambient. Provide a minimum 50 square-inch copper pour or aluminum heatsink beneath the package for industrial (-40 to +85 C) and avionics (-55 to +125 C) temperature grades.
Place a 0.1 microfarad ceramic decoupling capacitor on every VCC and VSS pin pair, located within 5 mm of the package. Add four bulk 10 microfarad tantalum capacitors near the corners of the CQFP footprint to suppress switching-noise injection on the 16 MHz internal bus. The external memory bus should use matched-impedance traces (typically 50-68 ohm) with matched trace lengths to within 12 mm to avoid bus skew above 12 MHz.
Do not confuse the FE (ceramic CQFP) package with the CA (plastic QFP) package - they share the same 144-pin count but are NOT drop-in pin-to-pin equivalents because the lead-frame and thermal expansion characteristics differ. Also note that the MC68340FE16E is NRND; for new designs use ColdFire MCF5206 or MCF5235. When migrating legacy code, recompile with a CPU32-compatible compiler such as Cosmic CX32 and verify timing loops at the new clock frequency.
Compliance Information
Compliance status not stated in verified web data; ceramic CQFP packages of this generation typically predate RoHS compliance requirements. Verified distributor listings do not explicitly state lead-free or RoHS status.
