TMS320BC51PQ80 - 80MHz 16-Bit Fixed-Point DSP | Texas Instruments
MPN： TMS320BC51PQ80 ✗ 停產TMS320BC51PQ80 概覽
A digital signal processor, or DSP, is a specialized microprocessor architecture optimized for arithmetic-intensive operations on continuously sampled signals. The TMS320C5x family combines a 16-bit ALU, hardware multiplier, dedicated program and data memories, and serial interface blocks. Unlike a general-purpose microcontroller, this architecture is intended to execute filtering, transform, modulation, decoding, and control algorithms with predictable instruction timing and efficient fixed-point arithmetic.
The headline operating characteristics of the TMS320BC51PQ80 are its 80 MHz clock rate, 16-bit fixed-point processor architecture, and 132-pin BQFP package. The family documentation describes single-cycle instruction execution times of 25 ns, 40 ns, and 50 ns for 3 V operation and 25 ns, 35 ns, and 50 ns for 5 V operation. These figures describe instruction timing rather than a universal application throughput guarantee.
The processor includes 16 kB of on-chip ROM for boot code or fixed routines and 4 kB of on-chip RAM for working data and program storage. Its BSP, SSP, and TDM interfaces support serial data movement between the DSP, converters, codecs, and neighboring digital processors. The 5 V core and I/O ratings simplify compatibility with conventional 5 V digital interfaces, while the large QFP package exposes a comparatively extensive pin set for clocking, memory, serial communications, and control functions.
Typical uses for this DSP include industrial control, audio and communications signal processing, motor-control algorithms, digital filtering, and embedded modulation or decoding. The fixed-point architecture is particularly suitable when deterministic arithmetic and efficient multiply-accumulate performance matter more than the convenience of a floating-point processor. Its integrated serial interfaces can reduce the need for separate data-conversion interface logic when the external signal chain supports compatible BSP, SSP, or TDM signaling.
Designers should verify the exact pin assignments, peripheral multiplexing, memory interface, clock requirements, and supported operating modes in the manufacturer datasheet before laying out a 132-pin PCB. The commercial 0 °C to 70 °C temperature rating restricts use in extended-temperature equipment, and the QFP package requires careful lead inspection and soldering. Since this device is obsolete, new production designs should also confirm availability, lifecycle risk, and whether a supported processor or supported successor is more appropriate.
This product page combines the documented processor identity, package, memory, interface, voltage, and temperature characteristics with practical sourcing guidance, candidate comparisons, and engineering considerations. It is intended to help teams evaluate legacy TMS320C5x designs quickly while preserving the distinction between a true pin-compatible replacement and a merely similar DSP.
直接替換替代品，適用於 TMS320BC51PQ80 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品TMS320BC51PQ80 規格
| Product Type | Fixed-point digital signal processor |
| Processor Architecture | TMS320C5x, 16-bit |
| Clock Rate | 80 MHz |
| Single-Cycle Instruction Execution Time at 3 V | 25 ns, 40 ns, or 50 ns |
| Single-Cycle Instruction Execution Time at 5 V | 25 ns, 35 ns, or 50 ns |
| On-Chip ROM | 16 kB |
| On-Chip RAM | 4 kB |
| Core Supply Voltage | 5 V |
| I/O Supply Voltage | 5 V |
| Interface Types | BSP, SSP, TDM |
| 工作溫度 | 0 °C to 70 °C |
| 封裝 | 132-pin BQFP |
| Package Body Size | 24.13 mm × 24.13 mm |
| Terminal Count | 132 terminals |
| 安裝類型 | Surface mount |
| Package Shape | Square QFP |
| 生命週期狀態 | Obsolete |
TMS320BC51PQ80 square qfp 腳位配置指南
TMS320BC51PQ80（square qfp 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TMS320BC51PQ80.
請參閱 資料表 以查看完整腳位配置。
典型應用
TMS320BC51PQ80 適用於 6 應用s: Digital Audio Filtering, Industrial Motor Control, Communications Signal Processing, Sensor Signal Conditioning, Digital Control and Instrumentation, Legacy Embedded Control Upgrade.
Digital Audio Filtering
The TMS320BC51PQ80 fits digital audio filtering because its 16-bit fixed-point TMS320C5x processor performs the multiply-accumulate arithmetic used in finite impulse response and infinite impulse response filters. The 80 MHz clock supports deterministic sample processing, while BSP, SSP, or TDM can carry audio data between the processor and a compatible codec. A practical implementation must match the codec’s clock rate, serial framing, word length, and channel order. The DSP should not replace the codec, analog amplifier, or output reconstruction filter; it processes the digital stream between them. Software development requires the appropriate TMS320C5x tools, startup support, linker configuration, and timing verification against the selected sample rate.
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Industrial Motor Control
The TMS320BC51PQ80 is applicable to deterministic industrial motor-control loops where a DSP can execute current and velocity calculations, transforms, and compensation algorithms. Its 80 MHz fixed-point CPU and integrated serial interfaces support connections to external converters and supervisory logic. The 0 °C to 70 °C commercial rating means the DSP itself is intended for controlled environments rather than hot machinery cabinets. A complete drive should isolate the control ground appropriately, protect unused inputs, and synchronize PWM generation with deterministic timing. Software partitioning and loop timing should be validated using worst-case instruction paths, while the power stage and its current sensing network must satisfy separate safety and electromagnetic-compatibility requirements.
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Communications Signal Processing
The TMS320BC51PQ80 can support communications signal-processing functions such as filtering, modulation-related computation, spectral transforms, and bit-oriented control logic. Its 80 MHz clock and 16-bit fixed-point architecture are appropriate for deterministic data movement between serial conversion hardware and the DSP pipeline. BSP, SSP, and TDM interfaces provide options for connecting compatible framing devices, although the selected mode must match the external transceiver architecture exactly. Designers should budget serial timing margin and avoid deriving unsupported clock rates from an external reference without checking the family clock-planning information. The limited 4 kB RAM also favors block processing, carefully placed data tables, or external memory support when algorithms require large working buffers.
推薦
Sensor Signal Conditioning
The TMS320BC51PQ80 can be used as the computational element in a digital sensor-conditioning system when an analog front end delivers a serial stream to one of its supported interfaces. The processor can apply calibration, filtering, offset correction, scaling, and nonlinear compensation before forwarding results to another controller. Its fixed-point arithmetic makes fixed-format scaling important, so the software plan should define binary points for each sensor range and verify overflow margins. The 4 kB RAM is modest for multi-channel workloads, making sequential channel processing or external buffering important considerations. Power, reference, grounding, and isolation determine whether the DSP sits directly beside a sensitive analog front end; the DSP cannot compensate for an unsuitable sensor excitation or converter interface.
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Digital Control and Instrumentation
The TMS320BC51PQ80 supports digital control and measurement functions that require repeatable fixed-point computation, including gain adjustment, calibration, table lookup, and real-time signal conditioning. Its integrated RAM and ROM permit a compact standalone design when the algorithm and boot program fit comfortably within those resources. The 132-pin package exposes many signals, but the large footprint and fine-pitch leads complicate hand assembly and inspection. A robust instrumentation design should provide clean references, buffered high-speed clocking, test-point access, and a controlled reset path. Software should include overflow handling and range checks so that abnormal sensor conditions produce a defined output rather than corrupting the control state.
推薦
Legacy Embedded Control Upgrade
The TMS320BC51PQ80 can be retained in an embedded upgrade when a legacy assembly already depends on its 16-bit TMS320C5x code, serial interfaces, and 80 MHz operating behavior. The device is obsolete, so an upgrade program should focus on securing traceable stock, verifying that the exact package and temperature grade remain available, and maintaining the original toolchain for reproduction. Its small 4 kB RAM can constrain modern compiler-generated code and debugging support, making code-size budgeting essential. Where a redesign is permitted, compare the processor against a currently supported embedded DSP or microcontroller rather than assuming that a package-compatible candidate will preserve legacy executable code, peripheral configuration, or timing.
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推薦產品摘要
工程參考資料，適用於 TMS320BC51PQ80 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TMS320BC51PQL80 | TMS320BC51PZL80 | TMS320LBC51PQA57 | TMS320F240PQA | TMS320C31PQA40 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
主要差異化特點
- High operating frequency within the legacy TMS320BC51 family (對比TMS320LBC51PQA57)
- Integrated program and data memory for compact standalone designs (對比TMS320C31PQA40)
- BSP, SSP, and TDM serial-interface coverage (對比TMS320F240PQA)
設計說明
Use the 132-pin BQFP land pattern and pin assignments directly from the Texas Instruments package drawing. The device body is 24.13 mm by 24.13 mm, so lead center spacing, exposed thermal requirements, and solder-mask design cannot be approximated from a generic 128-pin or 144-pin QFP footprint. Preserve pin 1 orientation, provide adequate lead clearance, and include test points for clock, reset, and major serial interfaces. Because no public pin map is rendered on this page, the manufacturer pin-description table must remain the controlling source during schematic and PCB review.
Plan separate core and I/O supply routing even though both are specified at 5 V. Place local high-frequency decoupling at the supply pins, route return currents through a continuous ground plane, and keep switching-node and converter return currents away from sensitive DSP references. Confirm capacitor voltage rating, effective capacitance at frequency, startup sequencing, and permitted supply ramps against the manufacturer datasheet. The listed 3 V and 5 V instruction times are operating conditions, not permission to operate the core or I/O rails outside their specified voltage ranges.
Do not treat a shared TMS320 family name, similar package, or comparison result as proof of drop-in compatibility. A valid substitution requires identical pin function or an explicitly documented pin mapping, compatible supply voltage, acceptable clock and timing behavior, equivalent peripheral configuration, and compatible software initialization. The candidate MPNs shown in the comparison table lack enough package and electrical detail to establish that condition. Verify every candidate against its own manufacturer datasheet and consider a PCB respin when multiplexing or functional differences affect the original land pattern.
Keep the DSP clock source and serial-interface routing short and referenced to a quiet ground region. Match clock and serial timing paths according to the relevant interface requirements, avoid routing them adjacent to switching converter inductors or high-current motor outputs, and provide common-mode considerations if external codecs or transceivers are used. The integrated 4 kB RAM and 16 kB ROM limit large buffering workloads, but PCB design should still expose serial debug access and preserve testability for production firmware validation and boundary scan where supported.
合規資訊
The commercial 0 °C to 70 °C device is not presented as an AEC-Q100-qualified automotive part. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations require confirmation for the exact obsolete orderable MPN.
