TMS320C51PQ - 16-Bit 50MIPS DSP | Texas Instruments | Signal Processing
MPN: TMS320C51PQ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.95 | $13.95 |
| 10 | $13.95 | $139.50 |
| 100 | $13.95 | $1,395.00 |
| 500 | $13.95 | $6,975.00 |
| 1,000 | $13.95 | $13,950.00 |
TMS320C51PQ Overview
A digital signal processor is a specialized microprocessor architecture optimized for filtering, Fourier analysis, speech processing, control, and other repetitive numerical operations. Unlike a general-purpose microcontroller, a DSP commonly combines a multiply-accumulate execution path, deterministic instruction timing, dedicated memory interfaces, and peripherals selected for high-throughput sampled-data processing. The TMS320C51PQ therefore sits within the hierarchy digital signal processor -> embedded processor -> semiconductor.
According to the verified datasheet snippets, the device contains a powerful 16-bit TMS320C5x CPU and supports 25, 35, or 50 ns single-cycle instruction execution for 5 V operation. Corresponding 3 V execution times are listed as 25, 40, or 50 ns. Its architecture supports single-cycle 16-bit multiplication, add, and address-generation operations, making throughput and cycle timing central considerations for DSP software design.
The part is suitable for industrial embedded signal processing, communications interfaces, audio and speech systems, measurement equipment, and real-time control. A designer should preserve the original system’s memory map, peripheral assignments, timing assumptions, and software toolchain when replacing or sourcing this legacy processor. Firmware, development tools, external memory, clock circuitry, and bus timing can be as important as the nominal instruction rate when evaluating a working design.
The most important design check is the complete 132-pin BQFP interface, including address, data, control, interrupt, and peripheral signals. Because the supplied data does not expose a complete manufacturer pin table, the pinout must be verified against the datasheet before PCB assembly or replacement. Power routing and decoupling should follow the original reference design because legacy processor systems may require tightly controlled clock and memory behavior.
This page consolidates verified distributor observations, datasheet snippets, sourcing information, and engineering cautions for the TMS320C51PQ. It distinguishes confirmed facts from unavailable electrical details and does not infer missing specifications, pricing tiers, pin names, or unverified drop-in replacements.
Drop-in alternatives for TMS320C51PQ — 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:
No drop-in alternatives available for this product.
Request AlternativesTMS320C51PQ Specifications
| Device Type | Digital Signal Processor (DSP) |
| Architecture | TMS320C5x, 16-bit |
| Word Size | 16-bit |
| Maximum Clock Frequency | 100 MHz |
| Maximum Performance | 50 MIPS |
| Arithmetic Type | Floating-point supported |
| 5 V Single-Cycle Execution Time | 25 ns, 35 ns, or 50 ns |
| 3 V Single-Cycle Execution Time | 25 ns, 40 ns, or 50 ns |
| Multiply-Add Operation | Single-cycle 16-bit multiply/add |
| Addressable Word Width | 16-bit maximum addressable word |
| Package | 132-pin BQFP |
| Mounting Type | Surface mount |
| Supply Voltage | 3 V or 5 V operation |
| RoHS Status | Non-compliant |
TMS320C51PQ 132-pin bqfp Pin Configuration Guide
Pin configuration for TMS320C51PQ (132-pin bqfp 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 TMS320C51PQ.
Refer to the datasheet for full pin configuration.
Typical Applications
TMS320C51PQ is suitable for 6 applications: Industrial Digital Signal Processing, Audio and Speech Processing, Communications Signal Conditioning, Measurement and Instrumentation, Real-Time Motion and Control, Legacy Embedded System Maintenance.
Industrial Digital Signal Processing
TMS320C51PQ fits legacy industrial processing systems where deterministic fixed-point execution and an established TMS320C5x software base justify retaining the architecture. Its 16-bit CPU and up to 50MIPS throughput provide compute capacity for filtering, control loops, and sampled-data analysis. The supplied data confirms single-cycle 16-bit multiply/add operations, but current limits, memory timing, and I/O requirements are not provided. Engineers should therefore preserve the validated clock, memory, interrupt, and peripheral arrangement rather than redesign around generic assumptions. This approach minimizes software migration risk while allowing existing control boards to remain electrically unchanged.
Recommended
Audio and Speech Processing
TMS320C51PQ can support legacy audio or speech-processing functions that require repeatable multiply-and-accumulate performance. Its 16-bit architecture, floating-point capability, 100 MHz maximum clock, and 50MIPS rating provide a substantial legacy compute base. An implementation must still account for codec interface timing, sample buffering, memory bandwidth, and interrupt latency, none of which is quantified in the supplied data. For an existing design, retaining the original peripheral mapping and validated firmware is safer than replacing the processor solely for nominal MIPS. New audio products should benchmark end-to-end latency and memory behavior before transfer.
Recommended
Communications Signal Conditioning
TMS320C51PQ may be used in established communications equipment for filtering, modulation-related computation, and interface signal conditioning. The verified 50MIPS throughput and single-cycle 16-bit multiply/add capability are useful for deterministic embedded numerical work. Compatibility depends on the original peripheral pinout, external memory, clocking, and firmware, so this is primarily a retention strategy for proven designs rather than a universal new-platform recommendation. Engineers should model worst-case buffer occupancy and interrupt latency because processor throughput alone does not establish communication-channel performance. Board changes also require controlled-impedance and clock-integrity review.
Recommended
Measurement and Instrumentation
TMS320C51PQ is applicable to legacy measurement systems that perform real-time filtering, calibration, or waveform analysis. Its 16-bit TMS320C5x CPU provides up to 50MIPS, while the advertised floating-point capability can simplify selected numerical tasks. A practical instrument still depends on high-quality converters, stable references, memory transfers, and deterministic control loops. Because the supplied information does not state converter interfaces, acquisition latency, or package power limits, engineers must reuse the proven analog front end and validate timing. The benefit is retaining a mature application rather than assuming a modern processor will reproduce legacy numerical behavior.
Recommended
Real-Time Motion and Control
TMS320C51PQ can execute deterministic control and motion-processing loops in legacy equipment where a 16-bit DSP and 50MIPS throughput meet the workload. Single-cycle multiply/add operations support filtering and control arithmetic, but actuator timing, loop rate, and PWM requirements must be evaluated separately. The supplied data does not identify motor-control peripherals, so it cannot be assumed to replace a dedicated motor controller. For existing systems, preserving established pulse-width timing, encoder interfaces, and safety behavior is critical. New designs should compare the processor against a device with documented real-time control peripherals and current tooling.
Recommended
Legacy Embedded System Maintenance
TMS320C51PQ is most defensible in maintenance programs where qualified software, boards, and peripheral assignments already exist. Its 100 MHz maximum clock and 50MIPS throughput are meaningful for an embedded 16-bit DSP, yet replacing it can invalidate timing assumptions and source-code compatibility. Procurement should first seek traceable inventory, inspect device markings, and reproduce the original power and memory configuration. A redesign should be considered only when tool support, lifecycle risk, or availability outweighs the cost of qualifying a new processor. Complete hardware and firmware regression testing is essential because nominal processor equivalence does not establish system equivalence.
Recommended
Recommended Products Summary
Engineering reference data for TMS320C51PQ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Texas Instruments |
| Package | 132-pin BQFP |
| Device Type | Digital Signal Processor (DSP) |
| Architecture | 16-bit TMS320C5x |
| Maximum Clock Frequency | 100 MHz |
| Maximum Performance | 50 MIPS |
| 5 V Execution Time | 25 ns, 35 ns, or 50 ns |
| 3 V Execution Time | 25 ns, 40 ns, or 50 ns |
| Multiply/Add | Single-cycle 16-bit multiply/add |
| RoHS Status | Non-compliant |
Design Notes
The verified data confirms 3 V and 5 V operation but does not provide absolute voltage limits, current consumption, or decoupling values. Reuse the exact supply topology from the original Texas Instruments reference design and verify every rail against the authoritative datasheet. Place local bulk and high-frequency decoupling capacitors at the device power pins, keep switching-current loops compact, and isolate analog or memory-return currents where the legacy layout requires it.
A 132-pin BQFP leaves little tolerance for an improvised footprint or escape-routing error. Compare land pattern, pin numbering, exposed thermal considerations, and assembly orientation directly with the original PCB and package drawing. Preserve the original clock and memory topology where possible, and route address, data, and control buses with the same topology that has already passed timing and EMC validation.
The verified 100 MHz maximum clock makes clean clock distribution and controlled return paths important, although the supplied data does not specify edge rates or I/O standards. Use the manufacturer’s recommended clock network and termination values, keep the clock away from high-current switching nodes, and maintain continuous ground-plane return beneath high-speed routes. Validate memory and bus timing on the actual board rather than relying only on nominal processor speed.
Compliance Information
One verified distributor listing explicitly reports RoHS non-compliant. No reliable supplied data confirms REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
