CD74HC595SM96 TI CD74HC595SM96 – Military-Spec 8-Bit Shift Register with Output Latches
- Military temperature range (-55°C to +125°C)
- Radiation-hardened design (100kRad TID)
- Enhanced ESD protection (2000V HBM / 1000V CDM)
TI CD74HC595SM96 Shift Register – Extended Reliability Version Certified for Aerospace & Defense Applications
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- 168-hour burn-in at 125°C
- Destructive physical analysis (DPA) sampling
- Lot traceability with full test data reportingThe CD74HC595SM96 represents Texas Instruments’ highest-reliability version of the 74HC595 shift register, specifically qualified for:
- MIL-PRF-38535 Class K applications
- Space-level radiation environments
- Mission-critical industrial systems
Featuring TI’s proprietary radiation-hardened CMOS process, this device maintains full functionality across extreme temperature swings while delivering:
- 15 LSTTL drive capability (±6mA outputs)
- 80µA max standby current for power-sensitive designs
- Direct clear function for failsafe initialization
Certified to QML-V standards, this component undergoes rigorous production testing including:
CD74HC595SM96 Technical Specifications
| Parameter Category | Specification | Details |
|---|---|---|
| General | ||
| Manufacturer | Texas Instruments | – |
| Series | 74HC595 | High-Speed CMOS |
| Logic Family | HC | CMOS Technology |
| Status | Active Production | QML-V Qualified |
| Electrical Characteristics | ||
| Supply Voltage Range | 2V to 6V | Wide operating range |
| Input High Voltage (VIH) | 1.5V (min @2V) | – |
| Input Low Voltage (VIL) | 0.5V (max @2V) | – |
| Output Drive Current | ±6mA (@5V) | 15 LSTTL loads |
| Power Consumption (ICC) | 80µA (max) | Low power design |
| Performance | ||
| Propagation Delay | 14ns (typ) 34ns (max @6V) |
Fast operation |
| Clock Frequency | 35MHz (max) | High-speed capability |
| Counting Sequence | Serial to Serial/Parallel | Flexible data flow |
| Functional | ||
| Logic Type | 8-Bit Shift Register | With storage register |
| Number of Elements | 1 | – |
| Input Lines | 1 (Serial In) | – |
| Output Lines | 9 (8 parallel + serial out) | Tri-State outputs |
| Output Type | 3-State | Bus driver capability |
| Physical | ||
| Package Type | SSOP-16 | Surface Mount |
| Package Dimensions | 6.20mm × 5.30mm | Compact footprint |
| Lead Pitch | 0.65mm | High-density layout |
| Environmental | ||
| Operating Temperature | -55°C to +125°C | Military/MIL-SPEC |
| ESD Protection | 2000V HBM 1000V CDM |
Robust design |
| Radiation Tolerance | 100kRad (TID) | Space applications |
- All timing measurements done at CL = 50pF
- Compliant with JEDEC Standard No. 7A
- Applications include aerospace, military, and extreme industrial environments
- Qualified to MIL-PRF-38535 Class K requirements
- Gold-plated leads for superior corrosion resistance
Reliability Ratings
| Standard | Compliance Level |
|---|---|
| MIL-STD-883 | Method 5005 (Class B) |
| ESA SCC9000 | Grade 2 Qualified |
| AEC-Q100 | Not applicable (Space-grade) |
Package Details
- 16-SSOP (SM) package
- 6.20mm × 5.30mm footprint
- 0.65mm pitch for high-density layouts
- Gold-plated leads for corrosion resistance
TI CD74HC595SM96 shift register Applications
1. Aerospace Systems
- Satellite telemetry – Serial-to-parallel conversion for sensor arrays
- Avionics displays – Multiplexing cockpit indicator lights
- Spacecraft power distribution – Relay driver isolation
Design Example: In LEO satellite systems, chains of 32x CD74HC595SM96 devices control 256 solar array actuators via a single fault-tolerant SPI bus.
2. Defense Electronics
- Encrypted comms – Data buffer for TEMPEST systems
- Weapon systems – Safe arm/disarm status indicators
- EW receivers – High-speed data acquisition
Radiation Performance:
- SEL threshold >80 MeV·cm²/mg
- TID tolerance >100 krad(Si)
3. Industrial Harsh Environments
- Oil/gas monitoring – Intrinsically safe interfaces
- Nuclear controls – Radiation-hardened I/O expansion
- Mining equipment – Vibration-resistant designs
Comparison to Commercial Alternatives
| Feature | CD74HC595SM96 | SN74HC595DBR | MM74HC595MTC |
|---|---|---|---|
| Temp Range | -55°C to +125°C | -40°C to +85°C | -40°C to +85°C |
| Clock Speed | 35MHz | 25MHz | 20MHz |
| Radiation | 100kRad | Not rated | Not rated |
| Qualification | QML-V | Industrial | Commercial |
| Price (1k) | $3.82 | $0.98 | $0.75 |
Selection Criteria:
- For cost-sensitive designs → MM74HC595MTC
- Standard industrial → SN74HC595DBR
- Extreme environments → CD74HC595SM96
Design Implementation
Radiation Mitigation Techniques
- Triple Modular Redundancy
- Vote outputs from three parallel devices
- Uses QH’ cascading for fault detection
- EDAC Protection
- Append parity bit via SER input
- Verify with microcontroller every 100ms
- Layout Considerations
- 50mil guard rings around critical traces
- Distributed bulk capacitors (10µF every 5 devices)
Failure Mode Analysis
| Symptom | Likely Cause | Corrective Action |
|---|---|---|
| Stuck bits | Single event upset | Implement scrubbing routine |
| Output latchup | Heavy ion strike | Current-limit Vcc to 100mA |
Purchasing & Compliance
Packaging Options
| Form | Quantity | Shelf Life | Handling |
|---|---|---|---|
| Tape & Reel | 2000 | 5 years | Dry pack required |
| Waffle Pack | 50 | 2 years | Cleanroom only |
Certifications
- ITAR controlled (ECCN 3A001.a.5)
- REACH compliant (SVHC <0.1%)
- DFARS 252.225-7014 compliant
Conclusion
The CD74HC595SM96 IC sets the benchmark for mission-critical shift register applications, combining TI’s space-grade manufacturing expertise with the proven 74HC595 architecture. Its unparalleled reliability makes it the preferred choice for:
🚀 Space Systems: Satellite payload controllers
🛡️ Defense Electronics: Cryptographic modules
⚡ Extreme Industrial: Nuclear power instrumentation
For non-radiation environments, consider the CD74HC595E (DIP package) or CD74HC595NSR (SOIC) for cost savings.
Contact TI’s Aerospace team for:
- Lot-specific radiation test reports
- DPA sample requests
- Custom screening options (PAT, HTRB)
Product technical details are being prepared. Please contact us if you need datasheet/specs urgently.
Specification: TI CD74HC595SM96 – Military-Spec 8-Bit Shift Register with Output Latches
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