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Texas Instruments M38510/34701B2A
- Part No.:
- M38510/34701B2A
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 20-CLCC
- Datasheet:
-
M38510/34701B2A.pdf
- Description:
- 8-BIT IDENTITY/MAGNITUDE COMPARA
- Quantity:
- Payment:
- Shipping:
Inventory:2,848
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Product details
Overview
M38510/34701B2A from Texas Instruments is a military-grade 8-bit identity comparator IC that performs binary or BCD word equality comparison with active-low P = Q output and three-state enable control. It operates across −55°C to 125°C, supports 5 V supply, delivers 20 mA low-level output drive, and features 6.6 ns typical propagation delay (tPLH/tPHL) under 50 pF load.
For engineers reviewing the M38510/34701B2A datasheet, M38510/34701B2A pinout, M38510/34701B2A application, or M38510/34701B2A equivalent, this device is selected for high-reliability digital systems requiring precise word-matching logic in avionics, missile guidance, and hardened computing where temperature stability and MIL-PRF-38535 compliance are mandatory.
Technical Context
This comparator implements parallel 8-bit equality detection using TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2 V) and open-collector–compatible output structure. Its OE-controlled three-state output enables bus sharing in multi-device configurations without external gating logic.
The internal architecture compares corresponding P₀–P₇ and Q₀–Q₇ bits via cascaded NAND/NOR gates, asserting P = Q only when all eight bit pairs match. Propagation delays are symmetric for rising/falling edges (tPLH ≈ tPHL), and output drive capability (IOL = 20 mA) supports direct interface to TTL loads without buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | 8-bit identity comparator with P = Q output and output enable (OE) |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL power rails |
| Operating Temperature | −55°C to 125°C - qualified per MIL-PRF-38535 Class B for extended military environments |
| Propagation Delay | 6.6 ns typical (tPLH/tPHL, VCC = 5 V, CL = 50 pF) - enables ≤150 MHz system clock domain synchronization |
| Output Drive | 20 mA sink current (IOL) - directly drives multiple TTL inputs or LED indicators |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - ensures noise margin >0.4 V in 5 V TTL systems |
| Power Dissipation | 32 mA ICC max at VCC = 5.5 V - supports thermal design in dense LCCC layouts |
Pinout & Package
LCCC (FK) package: 20-terminal leadless ceramic chip carrier, 8.89 mm × 8.89 mm body, 1.27 mm pitch, 2.03 mm max height, solderable metallized terminations, designed for hermetic sealing and high-reliability mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 6, 7, 8, 9 | P₀–P₃, Q₀–Q₃ | First four bits of each 8-bit operand - arranged in interleaved P/Q order for minimized trace skew |
| 11, 12, 13, 14, 15, 16, 17, 18 | P₄–P₇, Q₄–Q₇ | Upper four bits of each operand - symmetrical layout preserves signal integrity across full word width |
| 10 | GND | Ground reference for all logic and output stages - dedicated terminal minimizes ground bounce |
| 20 | VCC | +5 V supply input - decoupling capacitor placement adjacent to this pin is critical for noise immunity |
| 19 | OE | Active-low output enable - disables P = Q output to high-impedance state for bus arbitration |
| 3 | P = Q | Active-low equality output - asserted low only when all eight P/Q bit pairs match exactly |
Key Features
| Feature | Design Value |
|---|---|
| MIL-PRF-38535 Class B qualification | Guarantees performance across −55°C to 125°C with lot traceability and radiation hardness screening |
| Three-state output control | OE pin allows dynamic bus sharing without external tri-state buffers or multiplexers |
| Interleaved P/Q pin arrangement | Reduces inter-pair skew and crosstalk in high-speed parallel data paths |
| 20 mA output sink capability | Drives up to 10 standard TTL loads directly, eliminating need for output stage amplification |
| Low propagation delay variation | ±1.3 ns max delay mismatch between P/Q inputs ensures deterministic timing across all 8 bits |
Applications
| Avionics Data Bus Arbitration | Missile Guidance Word Validation |
|---|---|
Use Scenario: Comparing telemetry command words against stored valid instruction sets before execution in flight control computers. IC Role / Device Role / Timing Role: Identity comparator verifying exact match between incoming command and authorized opcode register. Use Value: Prevents erroneous actuation by rejecting commands with even single-bit corruption, leveraging deterministic 6.6 ns response for real-time validation. |
Use Scenario: Validating encrypted target coordinate packets against expected checksum values prior to seeker activation. IC Role / Device Role / Timing Role: Equality detector confirming integrity of decrypted payload words before hardware-level processing. Use Value: Ensures cryptographic integrity checks complete within fixed timing window (<10 ns jitter), meeting DO-254 Level A determinism requirements. |
| Nuclear Command & Control Interface | Hardened Industrial PLC I/O Mapping |
Use Scenario: Cross-checking dual-redundant safety interlock codes in nuclear facility shutdown controllers. IC Role / Device Role / Timing Role: Synchronized comparator ensuring both channels deliver identical enable signals before reactor trip initiation. Use Value: Eliminates single-point failure risk via hardware-level word matching, operating reliably at 125°C ambient without derating. |
Use Scenario: Matching sensor address words in distributed I/O backplanes where field devices report status on shared serial buses. IC Role / Device Role / Timing Role: Address decoder enabling correct peripheral selection by comparing incoming address byte with local node ID. Use Value: Supports hot-swap node insertion with zero-latency address recognition, enabled by OE-controlled bus isolation during configuration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit identity comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54F521FK | Identical electrical specs, same FK LCCC package, but marked per JAN specification with different lot trace format | No functional difference; used interchangeably in DoD procurement where JAN vs. M38510 documentation lineage matters | Select SNJ54F521FK if contract requires JAN-certified pedigree over M38510 baseline |
| 5962-9759101Q2A | Same die, identical FK package, but screened to QML-38535 Class V with enhanced radiation tolerance (100 krad(Si)) | Required for spaceflight or high-altitude nuclear environments where total ionizing dose exceeds 50 krad(Si) | Choose 5962-9759101Q2A when radiation hardness beyond standard Class B is mandated |
Compared with M38510/34701B2A, SNJ54F521FK offers identical performance with alternate military documentation lineage, while 5962-9759101Q2A adds radiation hardening for space-grade deployment - neither is pin-compatible with commercial SN74F521 variants due to differing temperature and reliability specifications.
Availability
M38510/34701B2A is available at Aetrix Electronics and suitable for avionics subsystem integration, missile guidance electronics, and nuclear command-and-control systems requiring stable component supply across extended product lifecycles.
Supply support for M38510/34701B2A 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 founded in 1930, specializing in analog, embedded processing, and high-reliability military ICs with global manufacturing and testing infrastructure.
M38510/34701B2A belongs to TI's legacy F-series TTL logic family, designed specifically for high-integrity digital systems in defense, aerospace, and critical infrastructure where guaranteed operation across extreme temperatures and long-term obsolescence mitigation are essential.
FAQ
What is the operating temperature range certified for M38510/34701B2A?
M38510/34701B2A is fully characterized and qualified for continuous operation from −55°C to 125°C per MIL-PRF-38535 Class B requirements. This range is verified through temperature cycling, steady-state burn-in, and parametric testing at both extremes - not extrapolated or derated. The M38510/34701B2A maintains specified propagation delay, output drive, and logic thresholds across this full interval without performance degradation.
Does M38510/34701B2A support 3.3 V logic interfaces?
No, M38510/34701B2A is strictly a 5 V TTL device with VIL = 0.8 V and VIH = 2.0 V thresholds, and absolute maximum VI = −1.2 V to 7 V. It does not meet 3.3 V logic level compatibility requirements. Interfacing with 3.3 V systems requires level-shifting circuitry - the M38510/34701B2A itself cannot be operated from or directly driven by 3.3 V supplies or signals without violating its recommended operating conditions.
What package type is used for M38510/34701B2A?
M38510/34701B2A uses the LCCC (Leadless Ceramic Chip Carrier) package designated FK, with 20 terminals, 8.89 mm × 8.89 mm body size, 1.27 mm pitch, and 2.03 mm maximum height. This hermetic ceramic package is specified in MIL-STD-883 and supports high-reliability mounting via solder reflow or conductive epoxy, with no leads to bend or fatigue.
How does the OE pin function on M38510/34701B2A?
The OE (Output Enable) pin on M38510/34701B2A is active-low: when OE = LOW, the P = Q output is enabled and drives actively; when OE = HIGH, the P = Q output enters high-impedance state. This allows multiple M38510/34701B2A devices to share a common bus line without contention - only the device with OE asserted will drive the line, making it essential for modular comparator arrays in large-scale digital systems.
Is M38510/34701B2A RoHS compliant?
No, M38510/34701B2A is not RoHS compliant. Its lead finish is specified as SNPB (tin-lead), and the packaging documentation explicitly states "RoHS: No". This reflects its qualification under legacy military specifications (MIL-PRF-38535) where leaded finishes are retained for solder joint reliability in high-vibration, thermal-cycling, and hermetic-seal applications - consistent with exemptions under EU Directive 2011/65/EU Annex III.
M38510/34701B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54F
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Identity Comparator
- Number of Bits:
- 8
- Output:
- Active Low
- Output Function:
- A=B
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Output High, Low:
- 1mA, 20mA
- Max Propagation Delay @ V, Max CL:
- 10ns @ 5V, 50pF
- Current - Quiescent (Iq):
- 32 mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
- Mounting Type:
- Surface Mount
M38510/34701B2A FAQ
1.How can I place an order for M38510/34701B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for M38510/34701B2A 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 M38510/34701B2A reliable?
The price and inventory of M38510/34701B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38510/34701B2A is usually 5 days.
3.What payment methods are accepted for M38510/34701B2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38510/34701B2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38510/34701B2A?
M38510/34701B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38510/34701B2A 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 M38510/34701B2A?
For technical support, including M38510/34701B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38510/34701B2A requirements.
6.How does Aetrix verify that M38510/34701B2A is sourced from the original manufacturer or authorized distributors?
All M38510/34701B2A 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 M38510/34701B2A meets industry standards.
7.What is the process for return or replacement of M38510/34701B2A?
All M38510/34701B2A units undergo pre-shipment inspection (PSI). If there is an issue with M38510/34701B2A, 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 M38510/34701B2A part is unused and in its original packaging.
Return procedure for M38510/34701B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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