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Texas Instruments TMS320C31PQA50
- Part No.:
- TMS320C31PQA50
- Manufacturer:
- Texas Instruments
- Category:
- DSP (Digital Signal Processors)
- Package:
- 132-BQFP Bumpered
- Datasheet:
-
TMS320C31PQA50.pdf
- Description:
- IC TMS320C31 DSP 50MHZ 132-QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
TMS320C31PQA50 from Texas Instruments is a 32-bit floating-point digital signal processor (DSP) operating at 5 V with 40-ns instruction cycle time, delivering 275 MOPS, 50 MFLOPS, and 25 MIPS. It integrates dual 1K × 32-bit on-chip RAM blocks, one serial port, two 32-bit timers, and a DMA coprocessor-enabling real-time audio filtering in industrial motor control systems.
For engineers reviewing the TMS320C31PQA50 datasheet, TMS320C31PQA50 pinout, TMS320C31PQA50 application, or TMS320C31PQA50 equivalent, key selection criteria include its 132-pin PQ package, industrial temperature range (–40°C to 125°C), 24-bit address bus, 32-bit data bus, and support for microcomputer boot-loader mode via MCBL/MP pin.
Technical Context
The TMS320C31PQA50 implements a hardware-intensive architecture with parallel ALU and multiplier execution in a single cycle, zero-overhead loops, and interlocked instructions for multiprocessing. Its dual-access RAM enables concurrent CPU and DMA operations without bus contention.
It uses 0.6 µm EPIC™ CMOS technology and supports TTL-compatible I/O with 5-V supply. The device features two auxiliary register arithmetic units (ARAUs), eight extended-precision registers, and configurable wait-state generation via bus-control registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 40 ns - determines maximum sustained throughput of 25 MIPS for integer code |
| Floating-Point Performance | 50 MFLOPS - enables real-time FIR/IIR filter execution with ≤200-tap length |
| On-Chip RAM | 2 × 1K × 32-bit dual-access blocks - supports simultaneous instruction fetch and data access |
| Address Bus Width | 24-bit - provides 16-Mword linear address space for program/data partitioning |
| Supply Voltage | 5 V ±5% - requires decoupling per TI SPRA020 guidelines to maintain timing margins |
| Operating Temperature | –40°C to +125°C - qualified for industrial motor drive and power converter control |
| Package | 132-pin plastic quad flatpack (PQ) - surface-mount compatible with standard reflow profiles |
Pinout & Package
Package: 132-pin plastic quad flatpack (PQ), 0.65 mm pitch, 24.0 mm × 24.0 mm body size, lead-free compatible per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D31–D0 | 32-bit bidirectional data bus | Transfers instructions/data during memory or I/O cycles; high-impedance when HOLD asserted |
| A23–A0 | 24-bit unidirectional address bus | Drives external memory or peripheral address lines; valid after STRB assertion |
| R/W | Read/write control | High = read, low = write; synchronizes data transfer direction with STRB strobe |
| STRB | External-access strobe | Indicates valid address/data window; used to latch A/D signals in external logic |
| RDY | Ready input | Extends bus cycle when low; allows interfacing with slow SRAM or peripherals |
| MCBL/MP | Boot mode select | Low = microcomputer boot-loader mode (loads code from serial port); high = microprocessor mode |
| XF0, XF1 | General-purpose I/O flags | Support interlocked instructions for synchronization between multiple DSPs or host processors |
| CLKR0, CLKX0, FSR0, FSX0, DR0, DX0 | Serial port 0 interface | Enables full-duplex synchronous serial communication (e.g., codec interface) |
| TCLK0, TCLK1 | Timer clock I/O | Accept external event pulses or generate precise PWM outputs for motor commutation |
| HOLD/HOLDA | Bus arbitration | Allows external DMA controller to seize bus without CPU intervention |
Key Features
| Feature | Design Value |
|---|---|
| Parallel ALU + multiplier | Single-cycle execution of multiply-accumulate (MAC) - essential for real-time FFT and filter kernels |
| Zero-overhead loops | Hardware loop counter eliminates branch overhead - improves deterministic latency in control loops |
| Two 1K × 32-bit dual-access RAMs | Enables simultaneous instruction fetch and operand load - sustains peak 50 MFLOPS without stalls |
| Interlocked instructions | Guarantees atomic read-modify-write on shared memory - required for multiprocessor synchronization |
| Configurable wait-state generation | Bus-control registers adjust STRB timing - simplifies interface to diverse memory technologies (SRAM, Flash, FIFO) |
Applications
| Industrial Motor Control | Audio Signal Processing |
|---|---|
Use Scenario: Real-time field-oriented control (FOC) of 3-phase AC induction motors in variable-frequency drives. IC Role / Device Role / Timing Role: Primary computation engine executing position/speed estimation, current regulation, and PWM generation at 10–20 kHz update rate. Use Value: 25 MIPS and 50 MFLOPS enable <10 µs loop closure for torque ripple reduction below 0.5% THD. | Use Scenario: Adaptive noise cancellation in professional broadcast audio mixers with multi-channel I/O. IC Role / Device Role / Timing Role: Dedicated coprocessor handling 128-tap adaptive FIR filters and spectral analysis on 48-kHz stereo streams. Use Value: Dual-access RAM and MAC unit sustain 4× concurrent filter channels with <50 µs latency per frame. |
| Power Converter Monitoring | Test & Measurement Equipment |
Use Scenario: Digital control of isolated DC-DC converters with real-time voltage/current loop compensation. IC Role / Device Role / Timing Role: System-on-module controller managing ADC sampling, PID calculation, and gate-driver timing via XF pins. Use Value: 24-bit addressing and 16-Mword space allow separate allocation for firmware, coefficients, and runtime variables. | Use Scenario: Waveform synthesis and spectral analysis in portable oscilloscopes with FFT-based triggering. IC Role / Device Role / Timing Role: High-speed data acquisition front-end processing 1M-sample buffers and computing 1024-point FFTs. Use Value: 275 MOPS throughput ensures sub-millisecond FFT completion for responsive UI feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar floating-point DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320C32PQL | Same C3x core, 50-MHz max clock, 144-pin LQFP package, enhanced boot ROM | Requires PCB redesign due to different pinout and larger footprint; supports faster external memory | Select when higher clock rate and integrated boot loader are needed, and layout revision is feasible |
| ADSP-21065L | SHARC architecture, 66-MHz core, 225 MFLOPS, 3.3-V supply, 240-pin BGA | Not pin-compatible; superior floating-point performance but higher power and cost; requires new thermal design | Choose for demanding FFT/audio applications where 50 MFLOPS is insufficient and BGA assembly is available |
Compared with TMS320C31PQA50, the TMS320C32PQL offers higher clock scalability and integrated boot ROM but demands mechanical redesign, while the ADSP-21065L delivers 4.5× greater MFLOPS at the cost of power, packaging complexity, and ecosystem divergence.
Availability
TMS320C31PQA50 is available at Aetrix Electronics and suitable for industrial motor control, audio signal processing, power converter monitoring, and test & measurement equipment requiring stable component supply across extended temperature ranges.
Supply support for TMS320C31PQA50 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments (TI) is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and digital signal processing technologies.
The TMS320C3x family-including the TMS320C31PQA50-was designed for high-performance, real-time embedded signal processing in industrial, automotive, and communications systems where deterministic floating-point execution is critical.
FAQ
What is the maximum operating frequency of the TMS320C31PQA50?
The TMS320C31PQA50 operates with a 40-ns instruction cycle time, corresponding to a maximum input clock frequency of 25 MHz (since H1/H3 run at half CLKIN). Its internal execution rate achieves 25 MIPS for integer code and 50 MFLOPS for floating-point operations under typical conditions.
Does the TMS320C31PQA50 support boot-loading from serial interfaces?
Yes, the TMS320C31PQA50 supports microcomputer boot-loader mode when the MCBL/MP pin is held low at reset. In this mode, it loads executable code from Serial Port 0 (DX0/DR0/FSX0/FSR0/CLKX0/CLKR0), enabling field firmware updates without external PROM.
What are the power supply requirements for the TMS320C31PQA50?
The TMS320C31PQA50 requires a single 5-V ±5% supply (VDD) with 20 dedicated VDD pins and 25 VSS pins. TI recommends 0.1-µF ceramic decoupling capacitors per VDD/VSS pair, placed within 5 mm of the package, per Application Report SPRA020.
Can the TMS320C31PQA50 interface directly with modern 3.3-V peripherals?
No-the TMS320C31PQA50 is a 5-V TTL-compatible device with VIH(min) = 2.0 V and VOH(min) = 2.4 V. Direct connection to 3.3-V logic requires level-shifting circuitry; interfacing with 5-V peripherals is native and electrically safe.
What debug capabilities does the TMS320C31PQA50 provide?
The TMS320C31PQA50 includes four emulation pins (EMU3–EMU0), with EMU3 as output and others as inputs. These support boundary-scan testing and basic halt/resume debugging via TI's XDS510-class emulators, though it lacks JTAG and advanced real-time trace found in later C5x/C6x generations.
TMS320C31PQA50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TMS320C3x
- Package/Case:
- 132-BQFP Bumpered
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Floating Point
- Interface:
- Serial Port
- Clock Rate:
- 50MHz
- Non-Volatile Memory:
- External
- On-Chip RAM:
- 8.25kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- -40°C ~ 125°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 132-BQFP (24.13x24.13)
TMS320C31PQA50 FAQ
1.How can I place an order for TMS320C31PQA50 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS320C31PQA50 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMS320C31PQA50 reliable?
The price and inventory of TMS320C31PQA50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS320C31PQA50 is usually 5 days.
3.What payment methods are accepted for TMS320C31PQA50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS320C31PQA50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS320C31PQA50?
TMS320C31PQA50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS320C31PQA50 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMS320C31PQA50?
For technical support, including TMS320C31PQA50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS320C31PQA50 requirements.
6.How does Aetrix verify that TMS320C31PQA50 is sourced from the original manufacturer or authorized distributors?
All TMS320C31PQA50 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMS320C31PQA50 meets industry standards.
7.What is the process for return or replacement of TMS320C31PQA50?
All TMS320C31PQA50 units undergo pre-shipment inspection (PSI). If there is an issue with TMS320C31PQA50, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMS320C31PQA50 part is unused and in its original packaging.
Return procedure for TMS320C31PQA50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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