TMS320P25FNL - 32-Bit 40MHz DSP, 68-Pin PLCC | Texas Instruments
MPN: TMS320P25FNL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $38.95 | $38.95 |
| 10 | $34.8 | $348.00 |
| 100 | $29.45 | $2,945.00 |
| 500 | $25.9 | $12,950.00 |
| 1,000 | $22.75 | $22,750.00 |
TMS320P25FNL Overview
A digital signal processor, or DSP, is a microprocessor optimized for arithmetic-heavy operations on continuously sampled or streaming data. Within the broader hierarchy of semiconductor -> integrated circuit -> processor -> microprocessor -> digital signal processor, the TMS320P25 family combines a dedicated processing core with memories, serial ports, timers, and parallel interfaces. This hierarchy makes the device suitable for implementing filters, transforms, modulation, speech processing, and embedded control algorithms.
Verified source information identifies the TMS320P25FNL as a fixed-point 32-bit DSP with a 40 MHz maximum clock and 40 MIPS execution rate. The device also includes a dedicated hardware multiplier, 16-bit memory-interface architecture, program-memory ROM, and RAM for DSP workloads. Its parallel and serial peripherals support communication with external processors, converters, memories, and application-specific circuits without requiring a separate peripheral controller.
The 68-pin PLCC package supports compact through-hole PCB assembly while exposing the processor's external address, data, control, serial, timer, and interrupt interfaces. Because the package uses a relatively high pin count and a dense lead arrangement, designers should preserve the manufacturer's recommended land pattern and route power and ground pins carefully. Texas Instruments documentation identifies the part as a member of the TMS320P25 family of VLSI digital signal processors and peripherals.
Typical applications include two-way radio base-station and mobile equipment, voice-processing terminals, digital audio and communications control, industrial signal processing, and embedded systems with real-time filtering or modulation requirements. The 40 MIPS fixed-point throughput is especially useful for deterministic tasks where execution time must remain predictable under changing inputs.
When designing around the TMS320P25FNL, verify clock, memory, and peripheral timing against the device operating requirements, and use decoupling close to the supply pins. Software developers should also use a linker configuration and development environment compatible with the TMS320P25 architecture. This page consolidates verified source data, purchasing information, package details, and application guidance while identifying unspecified technical data explicitly.
Drop-in alternatives for TMS320P25FNL — 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:
TMS320P25FN
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320P25F
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TMS320P25
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320P25FNLD
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320P25FNLZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TMS320P25FNL Specifications
| Device Type | Fixed-point digital signal processor |
| Instruction Word Width | 32 bit |
| Data Word Width | 16 bit |
| Maximum Clock Frequency | 40 MHz |
| Instruction Throughput | 40 MIPS |
| Package Type | 68-pin PLCC |
| Package Pin Count | 68 pins |
| Mounting Type | Through-hole surface-mount PLCC |
| Processor Architecture | TMS320P25 VLSI DSP |
| Arithmetic Type | Fixed-point |
| External Memory Architecture | 16 bit |
| Program Memory | ROM |
| Internal Memory | RAM |
| Hardware Multiplier | Yes |
| DigiKey Listing Description | Digital Signal Processor (DSP) |
| FindIC Package Description | 68-pin PLCC |
| FindIC Datasheet File Size | 767 KB |
| AllDataSheet Datasheet Page Count | 48 pages |
TMS320P25FNL 68-pin plcc Pin Configuration Guide
Pin configuration for TMS320P25FNL (68-pin plcc package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TMS320P25FNL.
Refer to the datasheet for full pin configuration.
Typical Applications
TMS320P25FNL is suitable for 6 applications: Two-Way Radio Communications, Digital Voice Processing, Industrial Audio and Signal Control, Digital Telephone and Terminal Equipment, Programmable Filter and Modulation Equipment, Embedded Control with DSP Coprocessing.
Two-Way Radio Communications
The TMS320P25FNL is appropriate for P25-style two-way radio signal-processing tasks because its 40 MHz clock and 40 MIPS throughput provide deterministic fixed-point execution for real-time filtering and communications algorithms. The 32-bit processor architecture, 16-bit data path, hardware multiplier, ROM, and RAM support DSP-centric code with efficient arithmetic. A communications design can place it beside a radio-frequency front end and codec or interface circuitry. Its main engineering consideration is preserving deterministic timing while external memory and serial peripherals transfer data. For a new design with substantially higher processing demand, a newer real-time control DSP may offer more performance and memory, but for an existing TMS320P25 radio architecture, the FNL preserves established software and board logic.
Recommended
Digital Voice Processing
The TMS320P25FNL fits digital voice-processing systems requiring repeatable real-time arithmetic at a 40 MIPS throughput. Its hardware multiplier supports the multiply-accumulate operations used by filters and speech algorithms, while internal RAM and program ROM help organize time-critical routines. In a voice terminal, the processor can manage sampled audio, analysis, synthesis, and control functions while communicating with external codecs through its serial peripherals. Deployment requires careful clock, memory, and interrupt planning so the 40 MHz core meets the sampling deadline. The architecture is especially attractive for maintaining qualified speech products, whereas a redesign should compare newer DSPs for larger RAM, faster buses, or updated development-tool support.
Recommended
Industrial Audio and Signal Control
TMS320P25FNL can serve in industrial audio, filtering, and embedded signal-control equipment when a mature fixed-point processor and deterministic 40 MIPS performance are preferred. The 68-pin PLCC package exposes the processor interfaces needed for external memory, converters, control logic, and communications. A practical implementation can combine the DSP with a PCM1808 ADC for capture and a PCM5102 DAC for playback, then use timer and serial resources for deterministic control. Because the processor operates from a dense legacy package, layout should follow the official 68-pin drawing and maintain short return paths for power and clock. This approach minimizes redesign risk for established product lines while still enabling programmable filters, equalization, and communications functions.
Recommended
Digital Telephone and Terminal Equipment
The TMS320P25FNL is suited to legacy digital telephone and terminal platforms that require dedicated real-time signal processing rather than general-purpose host execution. Its 40 MHz clock, 40 MIPS throughput, and hardware multiplier can handle echo-control, speech-processing, tone-generation, and data-transform workloads while the host manages protocols and user-interface functions. The 68-pin PLCC package supports integration with external memory and audio or line-interface circuits in a through-hole assembly strategy. Design teams should confirm serial-port compatibility, interrupt density, and the exact software ABI of existing code before production use. This makes the processor especially useful for sustaining established communications equipment rather than creating a new, software-defined platform from the ground up.
Recommended
Programmable Filter and Modulation Equipment
The TMS320P25FNL can implement programmable filters, modulation, correlation, and other arithmetic-intensive functions in test and signal-generation equipment. Its fixed-point DSP core and 40 MIPS throughput provide predictable execution for streaming algorithms, while program ROM and RAM provide dedicated code and working data storage. In an instrument, the processor can manage converters and control interfaces through its peripherals, allowing parameters to change without replacing fixed hardware. The principal constraint is that the 68-pin PLCC is a legacy assembly format; designers should account for assembly yield, board-space requirements, and long-term component sourcing. For new high-channel-count or high-bandwidth instruments, evaluate a newer DSP or FPGA architecture rather than assuming this device scales indefinitely.
Recommended
Embedded Control with DSP Coprocessing
The TMS320P25FNL can serve as a dedicated DSP engine beside a host processor in embedded control systems where filtering, transforms, or communications processing require deterministic execution. The main controller handles sequencing and user-facing logic, while the 40 MHz TMS320P25 executes time-critical math and communicates through parallel or serial interfaces. This division of labor can simplify migration from a larger general-purpose processor design, although shared-bus arbitration and interrupt latency must be carefully budgeted. The 68-pin PLCC footprint and separate ROM, RAM, and peripherals make the device useful in established industrial or communications platforms. For new platforms, compare the integration effort against modern site-listed processors with integrated memories and more compact packages.
Recommended
Recommended Products Summary
Engineering reference data for TMS320P25FNL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TMS320P25FN | TMS320P25F | TMS320P25 | TMS320P25FNLD | TMS320P25FNLZ |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC |
| Processor Type | Fixed-point digital signal processor | TMS320P25 fixed-point digital signal processor | TMS320P25 fixed-point digital signal processor | TMS320P25 fixed-point digital signal processor | TMS320P25 fixed-point digital signal processor | TMS320P25 fixed-point digital signal processor |
| Clock Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Instruction Throughput | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS | 40 MIPS |
| Processor Word Width | 32 bit | 32 bit | 32 bit | 32 bit | 32 bit | 32 bit |
| Program Memory | ROM | ROM | ROM | ROM | ROM | ROM |
| Internal Memory | RAM | RAM | RAM | RAM | RAM | RAM |
| Hardware Multiplier | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Established 40 MIPS deterministic throughput for embedded DSP workloads (vs TMS320F28377DPTPT)
- ROM, RAM, and hardware multiplier integrated for signal-processing firmware (vs TMS320C6748EZWT4)
- 68-pin PLCC package supports continuation of established PLCC board layouts (vs TMS320P25FN)
Design Notes
Use the manufacturer datasheet for the exact supply voltage, pin current, and decoupling requirements because those values are not exposed in the verified snippets. Place the required bypass capacitors close to the corresponding TMS320P25FNL supply and ground pins, with a short return path to the ground plane. Do not estimate dissipation from an inferred voltage because the verified data provides no current limits. For 40 MHz operation, verify clock jitter, power sequencing, and analog ground treatment against the original application guidance before release.
Preserve the official 68-pin PLCC land pattern and pin numbering rather than deriving it from the generic PLCC dimensions. Keep the clock route short, control external memory timing within verified datasheet limits, and avoid routing high-current digital outputs beneath sensitive analog inputs. Because individual pin names and electrical values are absent from the supplied source snippets, compare the final schematic and PCB against the archived 48-page datasheet. This check is essential because a wrong PLCC rotation or pin assignment can prevent programming or cause peripheral conflicts.
Do not treat a generic 40 MIPS label as proof that another processor is a drop-in replacement. A valid replacement must preserve the 68-pin PLCC assignment, power and I/O levels, boot behavior, memory interface, serial-port topology, timer and interrupt functions, and the expected TMS320P25 software environment. The provided cross-reference results do not establish a specific external replacement. Qualify any candidate with schematic comparison, boot testing, peripheral regression, timing analysis, and thermal testing before substituting it in production hardware.
Compliance Information
The supplied verified sources do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These values must be confirmed from the original manufacturer documentation or current supplier certificates.
