MC68HC11E0FU - 8-Bit 2 MHz ROMless MCU | Freescale
MPN: MC68HC11E0FU ✗ End of Life| Qty | Unit Price | Extended |
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MC68HC11E0FU Overview
A microcontroller is a semiconductor device that integrates a processor core, memory interfaces, I/O, timers, and communication peripherals into one package. The MC68HC11E0FU is specifically a ROMless 8-bit MCU, meaning application firmware must be supplied through external memory rather than an internal program ROM. Its 2 MHz operating frequency places it in the classic embedded-control class, where deterministic control loops and portable peripheral interfaces are generally more important than high computational throughput.
The verified product data confirms the key procurement-facing identity: M68HC11 series, 8-bit architecture, 2 MHz operation, ROMless configuration, and 64-QFP packaging. Because no official manufacturer PDF URL or detailed electrical tables were supplied, voltage range, RAM size, external-memory limits, I/O count, timer resources, communication blocks, environmental ratings, and absolute maximum values remain marked as data needed. Engineers should obtain the MC68HC11E Technical Data document and verify every pin and electrical limit before design release.
Typical legacy embedded uses include industrial controllers, appliance controllers, motor or relay logic, data-acquisition front ends, and educational embedded platforms. In these systems, the MCU would execute control firmware from external memory, drive I/O, and coordinate timers and communications. The MC68HC11E0FU is most appropriate where an existing 68HC11 architecture, memory map, toolchain, or board design already depends on this family.
A critical design consideration is that replacing an older MCU cannot be based only on matching clock speed. The external bus, memory devices, pin multiplexing, interrupt vector table, peripheral registers, timing, electrical limits, and software model must all be verified against the manufacturer documentation. The supplied web results do not establish a verified same-package, pin-to-pin drop-in replacement, so equivalent parts should not be approved solely from family-level search results.
This product summary combines the verified distributor identity with explicit data-gap markers and avoids guessing technical values. It is intended to support initial sourcing and legacy-system research, while datasheet review, schematic comparison, and firmware validation remain mandatory before production use.
Drop-in alternatives for MC68HC11E0FU — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC68HC11E0FU (same form factor and footprint) — differing in ADC, Package, Program Memory, Serial Interfaces, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68HC11E20CFU2
✅ Drop-In📋 Reference alternative (not in catalog)
MC68HC11E0CFNE3
✅ Drop-In✓ In Stock
$9.95 / Unit
View Datasheet →MC68HC711MA8FU
✅ Drop-In✓ In Stock
$11.6 / Unit
View Datasheet →MC68HC711E20CFU4
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC68HC908JL8MFAE
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →MC68HC11E0FU Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit ROMless microcontroller IC |
| Series | M68HC11 |
| CPU Architecture | 8-bit |
| Operating Frequency | 2 MHz |
| Program Memory | ROMless; external memory required |
| Package | 64-QFP (14 x 14 mm) |
| Terminal Count | 64 terminals |
| Terminal Form | Gull wing |
| Package Shape | Square |
| Temperature Grade | Commercial |
| Mounting Type | Surface mount |
MC68HC11E0FU square Pin Configuration Guide
Pin configuration for MC68HC11E0FU (square 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 MC68HC11E0FU.
Refer to the datasheet for full pin configuration.
Typical Applications
MC68HC11E0FU is suitable for 6 applications: Legacy industrial control, Appliance and equipment controller, Motor and relay sequencing, Data-acquisition front end, Educational embedded platform, Legacy peripheral bridge.
Legacy industrial control
The MC68HC11E0FU fits legacy industrial-control projects that already depend on the M68HC11 software and external-memory architecture. Its 8-bit CPU and 2 MHz operating frequency are appropriate for supervisory logic, discrete I/O control, sequencing, and simple machine monitoring rather than high-throughput computation. The ROMless configuration allows application firmware to remain in external memory, which can be useful when the original board already includes a known memory device and bus layout. The 64-QFP package also preserves the original gull-wing footprint for maintenance designs. Before deployment, verify supply limits, I/O ratings, timing, temperature range, and the complete MC68HC11E Technical Data document.
Recommended
Appliance and equipment controller
The MC68HC11E0FU can serve as the central controller in an appliance, instrument enclosure, or specialized equipment platform when the design retains an HC11 code base and external program memory. Its 8-bit architecture is well suited to state machines, button interfaces, relay sequencing, timers, and supervisory functions. The ROMless arrangement means the firmware image and external bus must be treated as part of the system design, not as an afterthought. A 64-QFP package provides the established 14 x 14 mm mechanical class for board-level maintenance. Confirm electrical and timing details in the official technical data before selecting it for new production.
Recommended
Motor and relay sequencing
For motor, relay, and actuator sequencing, the MC68HC11E0FU can execute deterministic control logic using its 8-bit processor and established M68HC11 peripherals. The 2 MHz class is suitable for supervisory sequencing, interlocks, timing, and discrete control when high-resolution computation is not required. Because the supplied evidence does not enumerate the exact timer outputs, pin multiplexing, or I/O current limits, the design must verify those functions in the MC68HC11E Technical Data document. External program memory also means the controller is best introduced where the existing memory bus and startup software are known and validated. Do not infer safety suitability from the commercial grade alone.
Recommended
Data-acquisition front end
The MC68HC11E0FU can be used in a legacy data-acquisition front end as the supervisory controller for sensor conditioning, sampling sequencing, and data transfer. Its 8-bit architecture and 2 MHz operating frequency are adequate for coordinating slower sensors and external converters, provided the required interfaces and timing are verified. The ROMless configuration allows firmware to be stored in external memory, which may help preserve an established acquisition architecture. The 64-QFP package provides many external connections for buses and control signals, but the exact I/O count and peripheral assignments are not included in the supplied data. Review the full pinout and electrical tables before assigning analog or high-speed signals.
Recommended
Educational embedded platform
The MC68HC11E0FU is relevant to educational and laboratory platforms built around the M68HC11 architecture because it exposes a classic 8-bit embedded-control environment with external program memory. It can support instruction-set studies, timing experiments, interrupt demonstrations, peripheral exercises, and legacy-toolchain training. The 2 MHz CPU and commercial package make the part recognizable in older development systems, but the exact development tools and debugger interfaces are not identified in the supplied results. Use the manufacturer documentation to determine programmer, emulation, and memory requirements. This application is especially appropriate when preserving an existing HC11 teaching platform is more important than adopting a newer MCU.
Recommended
Legacy peripheral bridge
The MC68HC11E0FU can be used as a legacy peripheral-bridge controller when a system already uses its external-memory bus and established HC11 software. Typical tasks include translating between a host interface and discrete control signals, coordinating relays, reading switches, and managing timing functions. The 8-bit processor and 2 MHz clock are sufficient for many supervisory and protocol-adaptation jobs, although the actual serial peripherals, port widths, and electrical limits remain unverified in the supplied search results. The 64-QFP package offers a high pin count for systems needing multiple external signals. Validate pin multiplexing, interrupt behavior, and level timing against the exact MC68HC11E technical data before layout release or production procurement.
Recommended
Recommended Products Summary
Engineering reference data for MC68HC11E0FU — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68HC11E20CFU2 | MC68HC11E0CFNE3 | MC68HC711MA8FU | MC68HC711E20CFU4 | MC68HC908JL8MFAE |
|---|---|---|---|---|---|---|
| Brand | Freescale Semiconductor | Motorola Semiconductor Products | Freescale Semiconductor | Freescale Semiconductor | Freescale Semiconductor | Freescale Semiconductor |
Key Differentiators
- Established M68HC11 ROMless architecture (vs MC68HC11E20CFU2)
- Known commercial package identity (vs MC68HC11E0CFNE3)
- Legacy ecosystem continuity (vs MC68HC711MA8FU)
Design Notes
Do not treat an M68HC11-family name or a nominal 64-QFP class as proof of drop-in compatibility. Compare the exact ordering code, package drawing, pin numbering, power pins, external-memory bus, I/O multiplexing, and absolute maximum ratings against the MC68HC11E Technical Data document. The supplied web results do not establish verified pin-level equivalence for the listed alternatives, so a replacement should remain unqualified until schematic and firmware review is complete.
Design the external memory and I/O rails only after confirming the MC68HC11E0FU supply-voltage limits, current ratings, and sequencing requirements from the manufacturer documentation. A ROMless design must include the external program-memory interface, so bus timing, address decoding, reset behavior, and memory-device compatibility are as important as the 2 MHz CPU clock. Do not infer supply compatibility from the commercial temperature grade or distributor listing.
For an existing 14 x 14 mm QFP footprint, preserve the manufacturer-defined pad geometry, pin-1 orientation, thermal or exposed-pad provisions if applicable, and gull-wing lead geometry. Because the supplied evidence does not include the complete pinout, verify every power, ground, reset, clock, bus, and I/O connection before release. Check assembly clearance and soldering-profile requirements against the exact package drawing rather than the generic QFP label.
Compliance Information
The supplied verified results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Compliance must be confirmed from the manufacturer or authorized distributor documentation for the exact ordering code.
