MCF51AG128CLF - 32-Bit 50MHz 128KB MCU | NXP
MPN: MCF51AG128CLF ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MCF51AG128CLF Overview
A microcontroller is a programmable semiconductor device that integrates a processor core, memory, and peripherals on one package. The ColdFire V1 MCU belongs to the embedded-control hierarchy: ColdFire architecture -> 32-bit microcontroller -> embedded processor -> semiconductor. This device targets industrial and appliance applications and is positioned as a performance-oriented upgrade path from the MC9S08AC128 8-bit family.
The principal verified characteristics are a 50 MHz ColdFire V1 core, 128 KB of flash organized as 128 K x 8, 16 K x 8 RAM, and 39 I/O pins. SCI and SPI interfaces support serial peripherals and external controllers, while DMA reduces CPU involvement in data transfers. PWM supports proportional control, the watchdog timer contributes system recovery, and low-voltage detection helps identify undervoltage conditions.
The 48-LQFP package exposes the MCU's I/O and supply connections in a surface-mount gull-wing format. Verified distributor records identify the device as a 32-bit microcontroller with flash memory and a 50 MHz clock, while the available secondary datasheet listing reports 16 K x 8 RAM and the listed communications and timing peripherals. Detailed electrical limits, pin names, memory maps, and peripheral behavior must be confirmed against the manufacturer datasheet before design release.
Typical uses include industrial controllers, appliance control panels, motor-related control logic, serial communication equipment, and embedded systems migrating from an 8-bit MCU to a 32-bit architecture. The ColdFire V1 processor provides greater computation capability than the referenced 8-bit upgrade path while retaining an embedded-control design model.
A key design consideration is package and pin verification. Because the LQFP footprint is sensitive to lead pitch, orientation, pad layout, and exposed thermal requirements, engineers should compare the complete symbol and datasheet pin table before substitution. Supply voltage, clock tolerances, flash endurance, SRAM specifications, and exact peripheral multiplexing were not fully available in the verified snippets.
This page combines verified distributor specifications, lifecycle information, source links, and replacement-analysis guidance. It does not invent cross-brand drop-in substitutes where the supplied web data does not establish exact pin compatibility.
Drop-in alternatives for MCF51AG128CLF — 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 MCF51AG128CLF (same form factor and footprint) — differing in Maximum Clock Frequency, Package, Series.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
R5F52315ADFL#30
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51JM128VLD
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →MCF51JM128EVLD
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51AC256ACLKE
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51CN128CLK
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51AG128CLF Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit microcontroller |
| Processor Core | ColdFire V1 |
| Architecture | 32-bit RISC |
| Maximum Clock Frequency | 50 MHz |
| Program Memory | 128 KB flash (128 K x 8) |
| RAM | 16 K x 8 |
| Series | MCF51AG |
| Package | 48-pin LQFP (7 x 7 mm) |
| I/O Count | 39 pins |
| Connectivity | SCI and SPI |
| Peripherals | DMA, LVD, PWM, and WDT |
| Application Domain | Industrial and appliance control |
| Mounting Type | Surface mount |
| Terminal Form | Gull wing |
| Package Code | LFQFP |
| Temperature Grade | Industrial |
MCF51AG128CLF lfqfp Pin Configuration Guide
Pin configuration for MCF51AG128CLF (lfqfp 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 MCF51AG128CLF.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF51AG128CLF is suitable for 6 applications: Industrial appliance controller, Appliance user-interface controller, Motor and proportional control, Serial communication equipment, 8-bit-to-32-bit controller migration, Data acquisition and monitoring.
Industrial appliance controller
The MCF51AG128CLF fits industrial appliance controllers that need a 32-bit control architecture without the complexity of a higher-performance application processor. Its verified 50 MHz ColdFire V1 core, 128 KB flash, and 16 K x 8 RAM provide headroom for control loops, state machines, and protocol handling. SCI and SPI can connect to sensors, displays, memory, or service interfaces, while PWM supports timing and proportional-control functions. Place the MCU in the 48-LQFP footprint only after checking the exact pin multiplexing, supply limits, and temperature requirements in the complete family datasheet.
Recommended
Appliance user-interface controller
For appliance user-interface and supervisory control, the MCF51AG128CLF combines 39 I/O pins with SCI and SPI connectivity in an industrial-oriented 48-LQFP package. A designer can allocate serial communication to a display or service controller and use PWM for indicators, valves, or motor-control signaling. The 128 KB flash program space is suitable for embedded UI logic and diagnostics, although exact memory and peripheral multiplexing must be verified. Software architecture should use the ColdFire toolchain and account for the difference from 8-bit S08 designs.
Recommended
Motor and proportional control
The MCF51AG128CLF is a candidate for embedded motor or proportional-control logic where a 50 MHz core and PWM resources are useful for deterministic sequencing. SCI can support a host or diagnostics channel, while SPI can connect to a digital converter, gate driver, or sensor. The MCU is not a replacement for a dedicated high-current power stage; rather, it manages timing, control, protection coordination, and system state. Validate PWM frequency, pin routing, watchdog behavior, and thermal limits against the complete datasheet before connecting it to a power-conversion board.
Recommended
Serial communication equipment
MCF51AG128CLF is suitable for embedded serial communication equipment because its verified feature set includes SCI, SPI, DMA, and a 50 MHz 32-bit core. SCI can support an external modem, service port, or distributed control link, while SPI can provide a fast interface to a serial transceiver, display, or storage device. DMA can reduce interrupt overhead for repetitive transfers, and the watchdog timer can improve recovery after faults. Final baud-rate limits, peripheral clock requirements, and multiplexing must be checked in the manufacturer datasheet.
Recommended
8-bit-to-32-bit controller migration
The MCF51AG128 datasheet describes the MCF51AG128 family as an upgrade path from MC9S08AC128 8-bit designs. MCF51AG128CLF is appropriate when an existing appliance or industrial controller needs more addressable performance, a 50 MHz 32-bit ColdFire V1 core, and 128 KB flash while retaining a familiar embedded-control workflow. Migration is not a pin-level or source-level substitution: reassess startup code, memory organization, interrupt priorities, peripheral registers, drivers, and board-level electrical limits before production.
Recommended
Data acquisition and monitoring
The 32-bit ColdFire V1 core and verified SCI/SPI connectivity make MCF51AG128CLF a reasonable base for compact monitoring equipment. SPI can connect to sensors or converters, SCI can provide a communications path to a host, and DMA can support recurring data movement. The 16 K x 8 RAM should be checked against the selected buffer strategy, while the 128 KB flash program area should be sized with the ColdFire firmware and diagnostics included. Confirm ADC availability, pin assignments, sampling timing, and operating-temperature limits because they are not quantified in the supplied snippets.
Recommended
Recommended Products Summary
Engineering reference data for MCF51AG128CLF — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R5F52315ADFL#30 | MCF51JM128VLD | MCF51JM128EVLD | MCF51AC256ACLKE | MCF51CN128CLK |
|---|---|---|---|---|---|---|
| Package | 48-LQFP (7 x 7 mm) | 48-LFQFP (7 x 7 mm) | 48-LFQFP (7 x 7 mm) | 48-LFQFP (7 x 7 mm) | 48-LFQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Brand | NXP Semiconductors | Renesas Electronics | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
Key Differentiators
- 32-bit ColdFire V1 architecture (vs MC9S08AC128)
- 128 KB flash program memory (vs MCF51AC256ACLKE)
- Dedicated connectivity and timing peripherals (vs MCF51CN128CLK)
- Verified 39-I/O industrial package configuration (vs MCF51JM128VLD)
Design Notes
Do not treat a 48-LQFP package match as proof of drop-in compatibility. Compare the complete mechanical drawing, pin-number table, power pins, ground pins, reset input, clock pins, alternate peripheral functions, and exposed-pad requirements. The supplied search results identify comparison candidates but do not provide enough electrical and pin-level detail to approve a production substitution without a formal review.
Route high-current supply and return paths deliberately and place required bypass capacitors close to the device power pins. Separate serial, clock, and sensitive control signals from switching nodes and high-current motor or power-stage routes. Because the available snippets do not provide pin names, pin multiplexing, or recommended capacitor values, use the complete MCF51AG128 family datasheet and reference design before laying out the PCB.
Estimate junction temperature from the actual supply voltage, I/O loading, clock activity, package thermal resistance, and ambient temperature rather than assuming that a 50 MHz rating alone determines thermal performance. The supplied data does not provide operating voltage, power dissipation, junction-temperature limits, or theta_JA, so those values must be obtained from the manufacturer datasheet before conducting a production thermal review.
Validate power sequencing, decoupling, and brownout behavior with the exact datasheet limits. The listed LVD feature can help detect undervoltage conditions, but it does not replace a safe power architecture. Confirm regulator tolerance, startup behavior, reset release, and watchdog interaction in hardware; none of these detailed values are present in the verified snippets.
Treat firmware migration from the MC9S08AC128 family as a software and memory-model project, not a binary drop-in change. Review startup code, interrupt vectors, register definitions, peripheral drivers, timing assumptions, and RAM allocation. The MCF51AG128 datasheet describes the device as an upgrade option, but that statement does not remove board-level compatibility requirements.
Compliance Information
No explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was present in the supplied verified data. Compliance must be confirmed from current NXP documentation or the distributor.
