TMS320C25FNAR - 40MHz 16-Bit DSP | Texas Instruments
部品番号: TMS320C25FNAR ✗ 生産終了TMS320C25FNAR 概要
A digital signal processor is a specialized semiconductor that executes arithmetic operations on streams of sampled data in real time. The DSP category sits above microprocessors in the embedded-computing hierarchy and uses parallel arithmetic units, structured memory, and deterministic instruction timing to process audio, communications, control, and measurement signals more efficiently than a general-purpose processor.
Key features include a 12.5 MIPS execution rate derived from the 40 MHz clock and 80 ns instruction cycle, 128K words of combined data and program address space, and dedicated on-chip memories for compact embedded systems. The fixed-point ALU and accumulator support high-throughput multiplication and accumulation, while the multiplier is optimized for the convolution and filtering operations common in digital signal processing.
The second-generation TMS320 architecture separates program and data memory addressing while providing a unified 128K-word address space. Its on-chip ROM and RAM reduce external memory requirements for fixed algorithms, and its 32-bit accumulator provides headroom for intermediate fixed-point results. The 68-pin PLCC package is intended for leaded through-hole PCB assembly rather than compact surface-mount designs.
Typical applications include audio signal processing, communications filtering and modulation, industrial control loops, vibration analysis, and instrumentation. A system can place the processor between an analog-to-digital converter and a digital-to-analog converter, with its ROM-resident or externally loaded algorithm performing sampling-rate conversion, filtering, spectral processing, or closed-loop control.
Designers should preserve the processor's required clock, reset, interrupt, memory, and peripheral interfaces exactly as defined by the manufacturer datasheet. Because this is a legacy PLCC processor, engineers should also verify production availability, software-tool compatibility, and any modern migration path before committing a new PCB design to it.
This product page consolidates verified architecture, memory, package, and timing information with sourcing guidance, application fit, and replacement considerations. It also distinguishes genuine same-package alternatives from older-generation processors that may perform similar functions but cannot be treated as transparent drop-in upgrades.
ドロップイン代替品: TMS320C25FNAR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TMS320C25FNAR （同一形状・フットプリント） — 相違点: Clock Frequency, Multiplier, Package, Processor Type.
TMS320C25FNA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TMS320C25FNLR
✅ ドロップイン価格はお問い合わせください
データシートを見る →TMS320C25FNA50
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TMS320C25FNAR 仕様
| Processor Type | Second-generation fixed-point digital signal processor |
| Data Word Length | 16 bit |
| Clock Frequency | 40 MHz |
| Instruction Cycle Time | 80 ns |
| Execution Rate | 12.5 MIPS |
| Arithmetic Logic Unit | 32 bit |
| Accumulator | 32 bit |
| Multiplier | 16 bit |
| On-Chip Data RAM | 544 words |
| On-Chip Program ROM | 4K words |
| Data and Program Address Space | 128K words |
| パッケージ | 68-pin PLCC |
| Package Type | Leaded plastic chip-carrier through-hole package |
TMS320C25FNAR leaded plastic chip-carrier through-hole package ピン配置ガイド
TMS320C25FNAR (leaded plastic chip-carrier through-hole package パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: TMS320C25FNAR.
詳細は データシート をご参照ください。
主な用途
TMS320C25FNAR の用途: 6 件s: Digital Audio Signal Processing, Communications Filtering and Modulation, Industrial Control and Motor Regulation, Vibration and Sensor Signal Analysis, Test and Measurement Instrumentation, Power Supply Monitoring and Protection.
Digital Audio Signal Processing
The TMS320C25FNAR fits fixed-point audio processing because its 40 MHz clock, 80 ns instruction cycle, 32-bit ALU and accumulator, and 16-bit multiplier support efficient multiply-accumulate operations used by filters and equalizers. An audio system can position the processor between an audio ADC and DAC, using the 544-word data RAM for sample buffers and the 4K-word program ROM for fixed routines. The 12.5 MIPS execution rate provides a concrete timing budget, although converter latency, serial-port throughput, and external memory wait states must be included in the end-to-end latency calculation. For new compact products, the legacy 68-pin PLCC footprint is a significant assembly consideration.
おすすめ
Communications Filtering and Modulation
TMS320C25FNAR is applicable to communications filtering, modulation, and demodulation blocks that require deterministic fixed-point arithmetic. Its 16-bit multiplier and 32-bit accumulator support the multiply-accumulate structure common in FIR and related signal-processing algorithms, while the 40 MHz clock provides 12.5 million instruction cycles per second before accounting for memory and peripheral stalls. The 128K-word combined data and program address space allows a system to extend beyond the 4K words of on-chip ROM, and 544 words of data RAM can support short sample or coefficient buffers. Designers should verify clock, memory, serial-port, and interrupt requirements against the exact manufacturer device table.
おすすめ
Industrial Control and Motor Regulation
The TMS320C25FNAR can implement deterministic industrial control loops because its 40 MHz clock and 80 ns instruction cycle provide a predictable computation rate, while the 32-bit accumulator retains headroom for multiply-accumulate control calculations. A practical loop would sample an analog sensor through a converter, execute the control law in fixed-point arithmetic, and update a DAC or digital-to-analog interface. The 544 words of data RAM can hold coefficients and short histories, while external memory provides room for larger algorithms. Because the verified data does not include timer, interrupt, analog-interface, or electrical-limit details, those functions must be confirmed from the official datasheet before the processor is placed in a safety-critical control loop.
おすすめ
Vibration and Sensor Signal Analysis
TMS320C25FNAR is suitable for vibration, condition-monitoring, and sensor-analysis systems that must perform filtering or spectral analysis on sampled data in real time. Its 16-bit fixed-point multiplier, 32-bit accumulator, 12.5 MIPS execution rate, and 544 words of on-chip data RAM provide a practical base for sampled-data algorithms. The processor can acquire blocks through its external interfaces, process them using ROM-resident or externally stored routines, and pass results to a host or display path. Engineering validation must include scaling to prevent overflow, memory wait-state analysis for the 128K-word address space, and confirmation of the target device's supply and operating-temperature limits, none of which were quantified in the supplied search snippets.
おすすめ
Test and Measurement Instrumentation
TMS320C25FNAR can serve as the processing engine in legacy instrumentation that performs real-time filtering, calibration, waveform processing, or fast measurement transforms. The 40 MHz clock and 32-bit accumulator support numerically intensive operations, while the 544-word data RAM accommodates compact working sets and the 4K-word ROM supports fixed startup or measurement routines. In an instrument architecture, the processor would capture converter data, apply calibration and algorithmic corrections, and transfer results through an available host or peripheral interface. The design must account for PLCC assembly, external memory behavior, and any requirement to preserve legacy system software. Because no verified tool-version or interface details were provided, migration should begin with a complete datasheet and software-environment audit.
おすすめ
Power Supply Monitoring and Protection
The TMS320C25FNAR can support specialized power-supply monitoring when a system requires real-time waveform analysis, threshold evaluation, or correction beyond simple analog comparators. Its 12.5 MIPS execution rate permits multiple fixed-point operations within each 80 ns instruction-cycle interval, and the 32-bit accumulator provides additional dynamic range for filtering intermediate values. A practical implementation would sample voltage or current through suitable conversion hardware, retain short histories in the 544-word data RAM, and evaluate protection or compensation logic using deterministic routines. The processor does not replace dedicated power-management silicon, and its legacy package, lifecycle status, and unreported electrical limits make it best suited to maintenance and specialized industrial systems rather than new high-volume platforms.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TMS320C25FNAR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TMS320C25FNA | TMS320C25FNLR | TMS320C25FNA50 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC | 68-pin PLCC |
| Processor Type | Second-generation fixed-point DSP | TMS320C25-family fixed-point DSP | Fixed-point digital signal processor | TMS320C25-family digital signal processor |
| Data Width | 16 bit | 16 bit | 16 bit | 16 bit |
| On-Chip Data RAM | 544 words | 544 words | 544 words | 544 words |
| On-Chip Program ROM | 4K words | 4K words | 4K words | 4K words |
| Data and Program Address Space | 128K words | 128K words | 128K words | 128K words |
| Arithmetic Logic Unit and Accumulator | 32-bit ALU and 32-bit accumulator | 32-bit ALU and accumulator | 32-bit ALU and accumulator | 32-bit ALU and accumulator |
| Multiplier | 16 bit | 16 bit | 16 bit | 16 bit |
主な差別化要因
- Exact verified 40 MHz operating point （vs TMS320C25FNLR)
- Second-generation fixed-point processing resources （vs TMS320C10FNLR)
- On-chip ROM supports compact fixed algorithms （vs TMS320C25FNA)
設計ノート
Do not substitute a TMS320C25 family member solely because it has the same 68-pin PLCC outline. The verified search results show that at least one related device is specified at 50 MHz, while the target listing identifies 40 MHz. Before replacement, compare the device-specific NMOS or CMOS electrical table, supply limits, clock period, reset behavior, memory organization, peripheral pins, and timing requirements in the official manufacturer datasheet.
Plan the board around the 68-pin PLCC footprint, including adequate hole clearance, lead pitch, connector accessibility, and mechanical support for the larger leaded package. The verified data does not provide body dimensions, so do not derive the land pattern from a generic PLCC library entry. Obtain the manufacturer mechanical drawing and verify pin numbering orientation before releasing artwork; incorrect rotation or numbering can produce a board that accepts the device but does not function.
Follow the exact electrical limits and decoupling guidance associated with the selected NMOS or CMOS device variant. The supplied sources confirm a legacy 68-pin PLCC architecture but do not provide the target's supply voltage, absolute maximum ratings, input thresholds, or output-drive capability. Before power-up, verify those values in the official TMS320C25 datasheet and use local bypass capacitors with short return paths, while checking that every supply sequence satisfies the processor's reset requirements.
The processor's 80 ns instruction cycle does not guarantee a usable external memory access time by itself. Account for address setup, hold time, propagation delay, and wait-state behavior for every attached memory device. Because the part supports a 128K-word combined data and program space, place slow external memories and buses so that processor timing remains deterministic. Use the timing diagrams in the manufacturer datasheet rather than estimating from processor clock frequency.
コンプライアンス情報
The supplied verified search results do not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable to this general-purpose legacy digital signal processor because no automotive qualification was identified.
