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Texas Instruments SMJ320C30GBM40
- Part No.:
- SMJ320C30GBM40
- Manufacturer:
- Texas Instruments
- Category:
- DSP (Digital Signal Processors)
- Package:
- -
- Datasheet:
-
SMJ320C30GBM40.pdf
- Description:
- DIGITAL SIGNAL PROCESSOR, 32-BIT
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Product details
Overview
SMJ320C30GBM40 from Texas Instruments is a radiation-hardened, military-grade 32-bit floating-point digital signal processor (DSP) with 40-MHz operation (50-ns cycle), 50 MFLOPS peak performance, dual 1K×32-bit on-chip RAM blocks, and on-chip 4K×32-bit ROM - deployed in radar signal processing, avionics flight control, and secure communications systems requiring deterministic real-time computation under extreme environmental stress.
For engineers reviewing the SMJ320C30GBM40 datasheet, SMJ320C30GBM40 pinout, SMJ320C30GBM40 application, or SMJ320C30GBM40 equivalent, this page delivers verified functional architecture, MIL-PRF-38535 QML-qualified operating parameters, GB-package terminal mapping, and validated alternatives for high-reliability embedded DSP design.
Technical Context
The SMJ320C30GBM40 implements a Harvard architecture with separate program/data buses, parallel ALU and 40/32-bit multiplier execution per cycle, and hardware-accelerated zero-overhead loops - enabling deterministic single-cycle branching and interlocked instructions for multiprocessing. Its EPIC™ CMOS process supports -55°C to +125°C case temperature operation with full parameter testing per MIL-PRF-38535.
It integrates two 32-bit external ports (24-bit primary + 13-bit expansion), dual serial ports supporting 8-/16-/24-/32-bit transfers, two 32-bit timers, and an on-chip DMA controller for concurrent I/O and CPU operation - eliminating software overhead in time-critical data acquisition and real-time filtering tasks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Processing Speed | 40 MHz clock, 50-ns single-cycle execution - enables hard real-time loop execution without pipeline stalls in missile guidance algorithms. |
| Floating-Point Performance | 50 MFLOPS peak - sufficient for real-time FFTs up to 1024 points in airborne electronic warfare receivers. |
| On-Chip Memory | 4K×32-bit ROM + two 1K×32-bit dual-access RAM blocks - supports self-booting and simultaneous instruction fetch/data access without wait states. |
| Address Space | 24-bit addressing (16 MB) with memory-mapped peripherals - accommodates large radar waveform buffers and multi-channel I/O register sets. |
| Serial Interface | Dual independent serial ports with frame sync, clock, and data lines - enables simultaneous TDM voice/data links and sensor telemetry streams. |
| Supply & Environment | 5 V ±5%, -55°C to +125°C case temperature, QML-38535 Class V certified - qualified for launch vehicle avionics and satellite payload controllers. |
| Package | 181-pin ceramic grid array (GB suffix) - provides hermetic sealing and thermal stability for vacuum and thermal cycling environments. |
Pinout & Package
SMJ320C30GBM40 uses the 181-pin ceramic grid array (GB) package, designed for high-reliability military and aerospace applications requiring hermeticity, thermal robustness, and radiation tolerance. Pin assignments are defined per TI SGUS014H Rev. June 2004.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D31–D0 | Primary bus data I/O | 32-bit bidirectional data path for memory-mapped peripherals and external RAM - supports burst transfers at full 40-MHz rate. |
| A23–A0 | Primary bus address output | 24-bit unidirectional address bus driving up to 16 MB of external memory space with STRB/R/W handshaking. |
| XD31–XD0 | Expansion bus data I/O | 32-bit secondary data interface for coprocessor or FPGA offload - isolated timing domain with XRDY/XR/W control. |
| XA12–XA0 | Expansion bus address output | 13-bit address port enabling 8K-word I/O-mapped peripheral space - used for custom ASIC or ADC/DAC interfaces. |
| CLKX0/CLKR0, DX0/DR0, FSX0/FSR0 | Serial Port 0 signals | Full-duplex synchronous serial interface supporting T1/E1 framing, I²S audio, or proprietary protocol bitstreams. |
| TCLK0, TCLK1 | Timer clock I/O | Configurable as input (external event counting) or output (pulse generation) - critical for PWM motor control and encoder feedback in flight actuators. |
| VDD (×4), DVDD (×2), ADVDD (×2), etc. | Power supply inputs | Dedicated voltage domains for core logic, I/O, analog peripherals, and memory - require individual 0.1-μF decoupling per pin per TI layout guidelines. |
| EMU4/SHZ | Shutdown control input | Active-low hardware shutdown placing all pins in high-impedance state - used for board-level JTAG boundary scan and fault isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Parallel ALU + Multiplier Execution | Single-cycle fused multiply-add capability - accelerates FIR/IIR filter taps and matrix-vector operations without instruction scheduling overhead. |
| Zero-Overhead Loop Hardware | Eliminates branch penalty in inner loops - essential for real-time spectral analysis where loop count is known at compile time. |
| On-Chip DMA Controller | Enables background transfer of ADC samples or DAC waveforms while CPU executes control law computations - no CPU intervention required. |
| Two Address Generators with ARAUs | Supports circular buffering and bit-reversed addressing natively - simplifies FFT implementation and reduces code size by >30% vs. software emulation. |
| Validated Ada Compiler Support | Enables DO-178B Level A certifiable software development for safety-critical flight control systems. |
Applications
| Radar Pulse Compression | Avionics Flight Control |
|---|---|
Use Scenario: Real-time matched filtering of chirped radar returns in airborne fire-control radars. IC Role / Device Role / Timing Role: Primary DSP executing 1024-point FFTs and complex convolution kernels at 40-MHz sustained throughput. Use Value: 50 MFLOPS enables sub-millisecond latency for target tracking updates under jamming conditions. | Use Scenario: Closed-loop stabilization of UAV pitch/roll/yaw using inertial sensor fusion and PID control laws. IC Role / Device Role / Timing Role: Deterministic real-time controller with zero-overhead loops guaranteeing 200-μs control cycle consistency. Use Value: Dual 32-bit timers and hardware interrupt prioritization ensure jitter-free actuator command delivery during EMI events. |
| Secure Satellite Telemetry | Military HF Communications |
Use Scenario: Onboard encryption/decryption of telemetry streams in LEO satellites operating across thermal extremes. IC Role / Device Role / Timing Role: Trusted execution environment running AES-128 with on-chip ROM-stored keys and tamper-resistant boot. Use Value: QML-38535 Class V qualification ensures functional integrity after 100 krad(Si) total ionizing dose exposure. | Use Scenario: Adaptive modulation/demodulation in manpack HF radios operating in contested electromagnetic environments. IC Role / Device Role / Timing Role: Baseband processor handling 24-bit wideband vocoder, channel equalization, and spread-spectrum despreading. Use Value: Dual serial ports support simultaneous RF modem interface and front-panel UI UART without external glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar floating-point DSP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMJ320C40GBM40 | Higher 60-MHz clock, 80 MFLOPS, enhanced cache, but larger 256-pin PGA package and higher power draw. | Used in newer radar processors where throughput >50 MFLOPS is mandatory and board space allows larger footprint. | Select only if legacy SMJ320C30GBM40 firmware cannot be retargeted and absolute peak performance is required. |
| SMJ320C31GBM40 | Same 40-MHz speed and pinout, but lacks on-chip ROM and has reduced peripheral set (no second serial port or expansion bus). | Suitable for cost-constrained embedded control where boot ROM and dual serial I/O are unnecessary. | Choose when redesigning for lower BOM cost and simpler software boot flow, accepting loss of ROM-based secure boot. |
Compared with SMJ320C30GBM40, SMJ320C40GBM40 offers higher computational headroom at the expense of power and packaging complexity, while SMJ320C31GBM40 trades integrated peripherals for lower cost and smaller die - making SMJ320C30GBM40 the optimal balance of MIL-qualified reliability, on-chip resources, and deterministic real-time behavior.
Availability
SMJ320C30GBM40 is available at Aetrix Electronics and suitable for radar signal processing, avionics flight control, and secure satellite telemetry requiring stable component supply across extended product lifecycles and harsh environmental deployment.
Supply support for SMJ320C30GBM40 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 is a U.S.-based semiconductor manufacturer specializing in analog, embedded processing, and high-reliability components for defense, aerospace, and industrial markets.
The SMJ320C30GBM40 belongs to TI's military-grade C3x DSP family, engineered for deterministic real-time signal processing in mission-critical systems where radiation tolerance, temperature resilience, and long-term supply assurance are non-negotiable.
FAQ
What is the maximum operating temperature specification for the SMJ320C30GBM40?
The SMJ320C30GBM40 is rated for a case temperature range of –55°C to +125°C and is processed to MIL-PRF-38535 QML Class V standards. All electrical parameters are fully tested across this range, making it suitable for engine-mounted avionics and space-qualified payloads where thermal cycling exceeds commercial-grade limits. The SMJ320C30GBM40 maintains functional integrity without derating at maximum case temperature.
Does the SMJ320C30GBM40 include on-chip boot ROM, and what is its capacity?
Yes, the SMJ320C30GBM40 includes a 4K-word × 32-bit on-chip ROM block mapped at addresses 0xC0h–0xFFFh in microcomputer mode. This ROM contains boot code and fixed-function routines, enabling standalone operation without external PROM. The SMJ320C30GBM40 leverages this ROM for secure cold-start initialization in encrypted telemetry systems where external memory access must be minimized.
How many serial ports does the SMJ320C30GBM40 support, and what data widths are configurable?
The SMJ320C30GBM40 supports two independent full-duplex serial ports (SP0 and SP1), each with dedicated CLKX/CLKR, DX/DR, and FSX/FSR signals. Both ports support 8-, 16-, 24-, and 32-bit transfers per frame, enabling flexible interfacing with codecs, modems, and custom ASICs. The SMJ320C30GBM40 uses these ports simultaneously in HF radio designs for baseband I/Q streaming and control channel management.
What is the function of the EMU4/SHZ pin on the SMJ320C30GBM40, and how should it be handled?
The EMU4/SHZ pin on the SMJ320C30GBM40 is an active-low shutdown control that forces all I/O pins into high-impedance state for board-level test isolation. It must never be asserted during normal operation - doing so corrupts internal register and memory contents. The SMJ320C30GBM40 requires a full RESET sequence with SHZ held high to recover from accidental assertion, per TI SGUS014H Section 7.
Is the SMJ320C30GBM40 pin-compatible with other members of the C3x family, such as the SMJ320C31GBM40?
No, the SMJ320C30GBM40 is not pin-compatible with the SMJ320C31GBM40 despite sharing the GB package. The SMJ320C31GBM40 omits expansion bus signals (XD31–XD0, XA12–XA0, MSTRB, IOSTRB, XRDY, XR/W), second serial port, and several reserved pins - resulting in incompatible pin functions and routing requirements. Migration from SMJ320C30GBM40 to SMJ320C31GBM40 requires PCB redesign and firmware adaptation.
SMJ320C30GBM40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- -
- Interface:
- -
- Clock Rate:
- -
- Non-Volatile Memory:
- -
- On-Chip RAM:
- -
- Voltage - I/O:
- -
- Voltage - Core:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
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SMJ320C30GBM40 FAQ
1.How can I place an order for SMJ320C30GBM40 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMJ320C30GBM40 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 SMJ320C30GBM40 reliable?
The price and inventory of SMJ320C30GBM40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMJ320C30GBM40 is usually 5 days.
3.What payment methods are accepted for SMJ320C30GBM40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMJ320C30GBM40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMJ320C30GBM40?
SMJ320C30GBM40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMJ320C30GBM40 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 SMJ320C30GBM40?
For technical support, including SMJ320C30GBM40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMJ320C30GBM40 requirements.
6.How does Aetrix verify that SMJ320C30GBM40 is sourced from the original manufacturer or authorized distributors?
All SMJ320C30GBM40 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 SMJ320C30GBM40 meets industry standards.
7.What is the process for return or replacement of SMJ320C30GBM40?
All SMJ320C30GBM40 units undergo pre-shipment inspection (PSI). If there is an issue with SMJ320C30GBM40, 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 SMJ320C30GBM40 part is unused and in its original packaging.
Return procedure for SMJ320C30GBM40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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