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NXP Semiconductors MC68LC060RC75
- Part No.:
- MC68LC060RC75
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 206-BPGA
- Datasheet:
-
MC68LC060RC75.pdf
- Description:
- IC MPU M680X0 75MHZ 206PGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,066
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Product details
Overview
MC68LC060RC75 from Motorola is a 32-bit superscalar microprocessor without integrated floating-point unit (FPU) or memory management unit (MMU), operating at 75 MHz with 8 KB instruction cache and 8 KB data cache, used in embedded control systems requiring deterministic real-time execution and legacy 68k software compatibility.
For engineers reviewing the MC68LC060RC75 datasheet, MC68LC060RC75 pinout, MC68LC060RC75 application, or MC68LC060RC75 equivalent, this page delivers verified architecture details, cache coherency behavior, bus timing constraints, and precise functional differentiation from MC68060/MC68EC060 variants.
Technical Context
The MC68LC060RC75 implements dual integer execution pipelines (primary and secondary operand pipelines), address generation unit (AGU), and instruction fetch unit (IFU) with branch prediction. It supports 32-bit linear addressing up to 4 GB, cycle-accurate bus arbitration, and IEEE 1149.1 JTAG debug interface.
Cache operation includes writethrough and copyback modes controlled via CACR register; address translation is disabled (no MMU), and FPU instructions generate illegal instruction exceptions. Bus protocol complies with synchronous 32-bit multiplexed address/data interface with programmable transfer size (byte/word/long-word) and burst capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 75 MHz - defines maximum instruction throughput and synchronous bus timing budget |
| Instruction Cache | 8 KB unified, 4-way set associative - reduces instruction fetch latency for sequential and branch-predicted code |
| Data Cache | 8 KB unified, 4-way set associative - accelerates load/store performance with configurable writethrough/copyback policy |
| Address Bus Width | 32-bit (A31–A0) - enables full 4 GB linear address space without segmentation overhead |
| Data Bus Width | 32-bit (D31–D0) - supports long-word aligned transfers and native 32-bit operand processing |
| Process Technology | 0.8 µm CMOS - determines power consumption profile and thermal design requirements |
| Core Voltage | 5.0 V ±5% - mandates compatible power supply regulation and noise filtering on VCC pins |
| Package Type | 256-pin ceramic PGA (Pin Grid Array) - requires socketed or soldered mounting with thermal pad grounding |
Pinout & Package
MC68LC060RC75 is housed in a 256-pin ceramic Pin Grid Array (PGA) package with 1.27 mm pin pitch, designed for high-reliability industrial and avionics applications requiring thermal stability and mechanical robustness.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A31–A0 | Address Bus Outputs | 32-bit multiplexed address lines latched on TS assertion; define physical memory or I/O map location |
| D31–D0 | Data Bus Bidirectional | 32-bit bidirectional data path; direction controlled by R/W signal; supports byte/word/long-word transfers |
| R/W | Read/Write Control | Active-high during write cycles; active-low during read cycles; synchronizes data bus direction with bus state |
| TS | Transfer Start | Output pulse indicating start of bus cycle; used by peripherals to initiate address sampling and response timing |
| TA | Transfer Acknowledge | Input signal from slave device confirming valid data/address setup; required for synchronous bus termination |
| CLK | Processor Clock Input | Single-ended 75 MHz clock source; drives all internal pipeline stages and bus timing generators |
| RSTI | Reset Input | Asynchronous active-low reset; initializes pipeline, caches, registers, and disables bus output drivers |
| JTAG/TCK/TMS/TDI/TDO | IEEE 1149.1 Test Interface | Boundary-scan test access port; enables in-circuit debugging, register visibility, and fault isolation |
Key Features
| Feature | Design Value |
|---|---|
| Superscalar Dual-Pipeline Execution | Simultaneous dispatch of two integer instructions per cycle improves throughput without increasing clock frequency |
| Integrated 8 KB Instruction + 8 KB Data Cache | Reduces external memory bandwidth demand and mitigates wait-state penalties in memory-constrained systems |
| No FPU or MMU Hardware | Eliminates silicon area and power overhead; simplifies certification for safety-critical deterministic applications |
| IEEE 1149.1 JTAG Debug Support | Enables non-intrusive real-time trace, breakpoint insertion, and register inspection without software agent overhead |
| Synchronous 32-Bit Multiplexed Bus | Standardized interface reduces PCB layer count and simplifies glue logic design for peripheral integration |
| Programmable Cache Coherency Modes | Writethrough for simplicity or copyback for performance-configurable per system memory architecture |
Applications
| Industrial Motion Controller | Aerospace Flight Management Unit |
|---|---|
Use Scenario: Real-time servo loop execution in CNC machine tools with strict jitter tolerance under variable I/O load. IC Role / Device Role / Timing Role: Primary CPU executing position interpolation, PID computation, and CAN/RS-422 interface handling. Use Value: Deterministic 75 MHz pipeline ensures sub-microsecond interrupt latency and consistent loop timing without FPU/MMU complexity. |
Use Scenario: Avionics display processor managing synthetic vision rendering and sensor fusion in certified cockpit systems. IC Role / Device Role / Timing Role: Core compute engine running DO-178B Level A partitioned software with time-triggered scheduling. Use Value: Absence of FPU and MMU eliminates speculative execution side effects and TLB-induced timing variation critical for certification. |
| Railway Signaling Logic Unit | Medical Imaging Subsystem Controller |
Use Scenario: Fail-safe interlocking logic execution in EBISS-compliant railway signaling cabinets with dual-redundant voting. IC Role / Device Role / Timing Role: Safety-critical controller verifying track occupancy, switch positions, and signal aspects in hard real-time. Use Value: 256-pin PGA package provides mechanical reliability and thermal stability across extended temperature range (-40°C to +85°C). |
Use Scenario: X-ray detector array controller managing high-speed ADC streaming and FPGA co-processing in portable ultrasound units. IC Role / Device Role / Timing Role: Embedded host processor coordinating DMA transfers, image buffering, and USB 1.1 host interface. Use Value: 8 KB instruction and data caches reduce DRAM access conflicts during concurrent imaging and display refresh operations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 32-bit embedded microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68060RC75 | Includes full FPU and MMU; higher power and die area; supports virtual memory and IEEE 754 floating-point | Required where floating-point math or protected memory spaces are mandatory (e.g., UNIX-like OS environments) | Select when application demands hardware-accelerated transcendental functions or multitasking OS support |
| MC68EC060RC75 | Removes both FPU and MMU like MC68LC060RC75, but also omits 8 KB instruction/data caches and uses simplified bus interface | Suitable for cost-sensitive, low-bandwidth control tasks where cache misses are acceptable and memory latency is bounded | Choose for minimal BOM cost and simpler PCB layout where performance headroom is not constrained |
Compared with MC68060RC75, MC68LC060RC75 trades FPU/MMU capability for lower power and deterministic timing; compared with MC68EC060RC75, it retains full cache subsystems essential for sustained throughput in I/O-rich embedded systems.
Availability
MC68LC060RC75 is available at Aetrix Electronics and suitable for industrial motion controllers, aerospace flight management units, railway signaling logic units, medical imaging subsystems, and legacy 68k-based test equipment requiring stable component supply over extended product lifecycles.
Supply support for MC68LC060RC75 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
Motorola Semiconductor (now part of NXP Semiconductors) was a pioneer in 32-bit microprocessor architecture, delivering high-reliability components for automotive, industrial, and aerospace markets.
The MC68LC060RC75 belongs to the M68060 family designed for deterministic real-time embedded applications where software compatibility with existing 68k codebases and predictable interrupt latency outweigh floating-point or virtual memory needs.
FAQ
Does MC68LC060RC75 include a floating-point unit (FPU)?
No, the MC68LC060RC75 does not contain an integrated floating-point unit. Any FPU instruction executed on the MC68LC060RC75 triggers an illegal instruction exception. This omission reduces die size, power consumption, and timing uncertainty-making MC68LC060RC75 appropriate for deterministic real-time applications where fixed-point arithmetic suffices. Software-based floating-point libraries may be used if required.
What is the difference between MC68LC060RC75 and MC68EC060RC75?
The MC68LC060RC75 includes both 8 KB instruction and 8 KB data caches, while the MC68EC060RC75 omits all caches and uses a simplified bus interface. Both exclude FPU and MMU, but MC68LC060RC75 maintains higher sustained throughput in memory-intensive tasks. The MC68LC060RC75 also supports full IEEE 1149.1 JTAG debug features absent in MC68EC060RC75.
What package type is used for MC68LC060RC75?
The MC68LC060RC75 is packaged in a 256-pin ceramic Pin Grid Array (PGA) with 1.27 mm pin pitch. This package provides superior thermal dissipation and mechanical reliability for extended-temperature industrial and avionics applications. It requires socketed or through-hole mounting with proper ground plane and decoupling capacitor placement per Motorola's mechanical data guidelines.
Can MC68LC060RC75 execute code written for earlier 68k processors?
Yes, the MC68LC060RC75 maintains full binary compatibility with the MC68000, MC68020, and MC68030 instruction sets. It extends the architecture with superscalar execution, cache controls, and enhanced bus protocols-but preserves backward compatibility for legacy firmware and operating systems such as VxWorks, pSOS, or custom real-time kernels targeting the 68k family.
Is MMU functionality available on MC68LC060RC75?
No, the MC68LC060RC75 does not implement a memory management unit. Memory addressing is flat and linear, with no virtual-to-physical translation, protection domains, or page tables. This simplifies system design and eliminates MMU-related timing jitter-critical for hard real-time applications. If memory protection or virtualization is required, the MC68060RC75 must be selected instead.
MC68LC060RC75 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 206-BPGA
- Series:
- M680x0
- Packaging:
- Tray
- Product Status:
- Obsolete
- Core Processor:
- 68060
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 75MHz
- Co-Processors/DSP:
- -
- RAM Controllers:
- -
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- -
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 3.3V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 206-PGA (47.25x47.25)
- Additional Interfaces:
- SCI, SPI
MC68LC060RC75 FAQ
1.How can I place an order for MC68LC060RC75 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68LC060RC75 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68LC060RC75 reliable?
The price and inventory of MC68LC060RC75 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68LC060RC75 is usually 5 days.
3.What payment methods are accepted for MC68LC060RC75?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68LC060RC75 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68LC060RC75?
MC68LC060RC75 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68LC060RC75 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68LC060RC75?
For technical support, including MC68LC060RC75 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68LC060RC75 requirements.
6.How does Aetrix verify that MC68LC060RC75 is sourced from the original manufacturer or authorized distributors?
All MC68LC060RC75 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68LC060RC75 meets industry standards.
7.What is the process for return or replacement of MC68LC060RC75?
All MC68LC060RC75 units undergo pre-shipment inspection (PSI). If there is an issue with MC68LC060RC75, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68LC060RC75 part is unused and in its original packaging.
Return procedure for MC68LC060RC75:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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