SCF5250LAG100 Equivalent & Substitute Parts

Part Overview

The SCF5250LAG100 is a 32-bit single-core Coldfire V2 microcontroller manufactured by NXP USA Inc., operating at 100MHz with ROMless architecture and 128K x 8 RAM. This device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, redesigns, and production continuity. The part operates within a supply voltage range of 1.08V to 1.32V and is housed in a 144-LQFP (20x20) surface mount package with 57 I/O pins.

Substiute Parts

SCF5250LAG100

NXP USA Inc.In Stock: 1559SCF5250LAG100 Datasheet

Current PartRFQ

TMS320R2811PBKA

Texas InstrumentsIn Stock: 3318TMS320R2811PBKA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SCF5250LAG100 is determined by the following critical parameters:

• 32-bit single-core architecture requirement
• ROMless program memory configuration
• Operating frequency capability (100MHz minimum)
• RAM capacity (128K x 8 minimum)
• I/O pin count (57 minimum)
• Surface mount LQFP package format
• RoHS3 compliance and REACH unaffected status

The TMS320R2811PBKA qualifies as a substitute based on matching core architecture (32-bit single-core), ROMless memory type, equivalent I/O count (56 pins), surface mount LQFP packaging (128-LQFP 14x14), and identical RoHS3 compliance. The substitute operates at higher frequency (150MHz) and maintains ROMless configuration with compatible RAM organization (20K x 16).

Parameter Comparison

Engineering Selection Recommendations

The TMS320R2811PBKA is available as an active production part from Texas Instruments, providing supply chain continuity for the obsolete SCF5250LAG100. Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

Selection of this substitute requires evaluation of the following design impacts:

• Voltage supply range differs significantly (1.81V ~ 2V vs. 1.08V ~ 1.32V), necessitating power supply circuit redesign
• Package footprint change from 144-LQFP (20x20) to 128-LQFP (14x14) requires PCB layout modification
• RAM capacity reduction from 128K x 8 to 20K x 16 requires verification against application memory requirements
• I/O pin count reduction from 57 to 56 requires assessment of design signal routing
• Operating frequency increase from 100MHz to 150MHz provides performance headroom

The substitute's active product status and automotive qualification (AEC-Q100) support long-term availability and reliability in production environments.

Frequently Asked Questions (FAQ)

Q: Can the TMS320R2811PBKA directly replace the SCF5250LAG100 without design modifications?

A: No. The substitute requires design modifications due to differing voltage supply ranges, package footprints, and RAM organization. Direct socket replacement is not possible.

Q: What is the primary reason for substitution?

A: The SCF5250LAG100 is classified as obsolete. The TMS320R2811PBKA is an active production part that matches core architectural requirements (32-bit single-core ROMless microcontroller) and regulatory compliance standards.

Q: Are there connectivity differences between these parts?

A: Yes. The SCF5250LAG100 includes EBI/EMI, I2C, IDE, Memory Card, SPI, and UART/USART connectivity. The TMS320R2811PBKA provides CANbus, I2C, McBSP, SCI, SPI, and UART/USART. Application-specific connectivity requirements must be evaluated.

Q: What is the impact of the RAM size difference?

A: The SCF5250LAG100 provides 128K x 8 RAM, while the TMS320R2811PBKA provides 20K x 16 RAM. Applications requiring more than 20K x 16 RAM capacity cannot use this substitute without external memory additions.

Q: Does the package size change affect compatibility?

A: Yes. The SCF5250LAG100 uses 144-LQFP (20x20) packaging, while the TMS320R2811PBKA uses 128-LQFP (14x14). PCB layout redesign is required, including trace routing and component placement modifications.

Q: What are the voltage supply implications?

A: The SCF5250LAG100 operates at 1.08V ~ 1.32V, while the TMS320R2811PBKA requires 1.81V ~ 2V. Power supply circuits must be redesigned to accommodate the higher voltage range of the substitute.