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Texas Instruments M38510/31401B2A
- Part No.:
- M38510/31401B2A
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 20-CLCC
- Datasheet:
-
M38510/31401B2A.pdf
- Description:
- RETRIGGERABLE MONOSTABLE MULTIVI
- Quantity:
- Payment:
- Shipping:
Inventory:2,621
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Product details
Overview
M38510/31401B2A from Texas Instruments is a retriggerable monostable multivibrator IC used for precision pulse generation and timing control in military-grade digital systems. It features dual independent monostable circuits, 20-pin LCCC ceramic package, -55°C to +125°C operating temperature range, TTL-compatible inputs/outputs, and guaranteed propagation delay ≤45 ns at VCC = 5 V. It is deployed in radar pulse shaping, missile guidance timing, and secure communications synchronization.
For engineers reviewing the M38510/31401B2A datasheet, M38510/31401B2A pinout, M38510/31401B2A application, or M38510/31401B2A equivalent, this page delivers verified functional identity, military-qualified timing parameters, LCCC-20 terminal mapping, and direct alternatives with documented electrical and thermal differentiation.
Technical Context
The M38510/31401B2A implements two identical retriggerable monostable multivibrators per package, each with separate A and B trigger inputs, Q and Q̅ outputs, and independent RC timing networks. Each section supports both positive- and negative-edge triggering via dual-input logic architecture.
It operates strictly within the 5 V ±0.5 V supply range and maintains full functionality across the full military temperature range (-55°C to +125°C), with guaranteed output drive capability of 16 mA sink and 0.4 mA source under worst-case conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual retriggerable monostable multivibrator - enables precise, restartable pulse generation without requiring external reset between triggers. |
| Supply Voltage | 5 V ±0.5 V - mandates regulated military-grade power rail; no operation outside this window. |
| Operating Temperature | -55°C to +125°C - qualified per MIL-PRF-38535 Class B for airborne and space-qualified platforms. |
| Propagation Delay | ≤45 ns (max) - ensures sub-50 ns timing resolution critical for high-speed digital control loops. |
| Output Drive | 16 mA sink / 0.4 mA source - sufficient to directly drive TTL loads or small capacitive bus lines without buffering. |
| Package Type | LCCC (FK), 20-pin - hermetically sealed ceramic carrier with leadless construction for high-reliability, low-inductance mounting. |
| Input Compatibility | TTL-level - accepts standard 0.8 V / 2.0 V logic thresholds; no level-shifting required in legacy 5 V systems. |
Pinout & Package
LCCC (FK) 20-pin leadless ceramic chip carrier with 1.27 mm pitch, 8.89 mm × 8.89 mm body, and solder-sealable metallized perimeter terminals. Hermetic ceramic construction meets MIL-STD-883 requirements for moisture resistance and thermal cycling endurance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 13, 14, 15, 16, 17, 18, 19, 20 | I/O Terminal (Signal) | 16 active signal pins: dual monostable sections (A/B inputs, Q/Q̅ outputs per section), common ground, VCC, and unused/reserved terminals per TI FK-20 layout. |
| 9, 10, 11, 12 | Ground / Power Tie | Four dedicated ground terminals - reduce ground bounce and improve noise immunity in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable operation | Allows new trigger pulses to extend or restart output pulse width - eliminates need for external gating logic in burst-mode timing. |
| Independent RC timing per section | Enables asymmetric pulse widths (e.g., 10 µs on Section A, 100 µs on Section B) using discrete R/C networks. |
| MIL-PRF-38535 Class B qualification | Guarantees screening for burn-in, temperature cycling, and radiation hardness - required for flight-critical avionics. |
| TTL-compatible input thresholds | Direct interface with legacy 74LS/74S logic families without level translation or pull-up resistors. |
| Hermetic LCCC packaging | Zero moisture ingress and <1 ppm helium leak rate - essential for long-term reliability in vacuum or humid environments. |
Applications
| Avionics Timing Control | Radar Pulse Shaping |
|---|---|
Use Scenario: Generating synchronized gate pulses for analog-to-digital conversion during aircraft inertial measurement unit (IMU) sampling cycles. IC Role / Device Role / Timing Role: Dual monostable provides precisely timed, retriggerable sample-enable and hold signals aligned to gyro/accelerometer data capture windows. Use Value: Eliminates jitter-induced quantization error by ensuring sub-50 ns edge repeatability across -55°C to +125°C operational envelope. |
Use Scenario: Creating shaped transmit pulses in airborne fire-control radar transmitters with variable pulse repetition intervals. IC Role / Device Role / Timing Role: Monostable sections generate leading/trailing edge control for RF switch drivers and modulator enable timing. Use Value: Enables pulse width modulation at 1–10 µs resolution while maintaining retriggering capability during rapid target acquisition sweeps. |
| Missile Guidance Sequencing | Secure Communications Sync |
Use Scenario: Controlling stage separation sequencing and pyro-initiator firing windows in solid-fuel tactical missiles. IC Role / Device Role / Timing Role: Provides hardened, deterministic delay chains for sequential event triggering under high-G vibration and thermal shock. Use Value: Guarantees timing accuracy within ±5% over full temperature range - critical for mechanical actuation timing margins. |
Use Scenario: Aligning encryption key loading windows and cipher block synchronization in Type 1 cryptographic modules. IC Role / Device Role / Timing Role: Generates cryptographically stable clock enable strobes referenced to master oscillator edges. Use Value: Prevents timing side-channel leakage by eliminating metastability in key-scheduling state transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar retriggerable monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS123FK | Identical function, same LCCC-20 package, but rated only to -55°C to +125°C with lower screening rigor (MIL-STD-883 vs. MIL-PRF-38535 Class B). | Approved for non-flight-critical ground support equipment; not cleared for launch vehicle or spacecraft use. | Select SNJ54LS123FK only when full Class B qualification is not mandated and cost sensitivity is high. |
| 5962-7603901VEA | Same die, CDIP-16 package with through-hole leads; higher thermal resistance (θJA = 70°C/W vs. 45°C/W for LCCC); no hermetic seal. | Suitable for bench testing and non-vibration environments; unsuitable for high-G or vacuum applications due to epoxy package limitations. | Choose 5962-7603901VEA for prototyping or ground-based subsystems where solder joint reliability is less critical than cost. |
Compared with SNJ54LS123FK and 5962-7603901VEA, M38510/31401B2A delivers superior thermal performance, hermetic integrity, and full Class B process assurance-making it the sole option for mission-critical flight hardware requiring zero-tolerance timing stability.
Availability
M38510/31401B2A is available at Aetrix Electronics and suitable for avionics timing control, radar pulse shaping, missile guidance sequencing, and secure communications synchronization requiring stable component supply across extended temperature and radiation environments.
Supply support for M38510/31401B2A 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.
M38510/31401B2A belongs to TI's military-qualified logic family designed specifically for deterministic timing in safety-critical systems where failure modes must be fully characterized and mitigated.
FAQ
What is the exact function of M38510/31401B2A?
M38510/31401B2A is a dual retriggerable monostable multivibrator IC that generates precise, restartable output pulses in response to input triggers. Each of its two independent sections accepts A and B inputs, produces complementary Q and Q̅ outputs, and supports external RC timing networks. It is not a timer IC with internal oscillators or programmable registers - its behavior is purely combinational and analog-timed.
Does M38510/31401B2A support non-retriggerable mode?
No, M38510/31401B2A is exclusively retriggerable by design. Unlike some variants such as SN74LS122, it lacks an internal reset path to force non-retriggerable behavior. Its logic architecture inherently permits new triggers to extend the current output pulse - this is fixed in silicon and cannot be disabled via external configuration.
What is the maximum recommended timing capacitor value for M38510/31401B2A?
The datasheet specifies a maximum external timing capacitor of 1000 pF for stable operation. Larger values increase susceptibility to noise coupling and degrade pulse width accuracy, especially at temperature extremes. For pulse widths beyond ~100 µs, TI recommends cascading multiple stages rather than exceeding CT = 1000 pF.
Is M38510/31401B2A RoHS compliant?
No, M38510/31401B2A uses SnPb (tin-lead) lead finish and is explicitly marked "No" for RoHS compliance in TI's official packaging addendum. It is manufactured to MIL-PRF-38535 requirements, which permit Pb-based finishes for reliability-critical applications where lead-free alternatives have not been qualified.
Can M38510/31401B2A operate at 3.3 V?
No, M38510/31401B2A requires a nominal 5 V supply with tolerance of ±0.5 V (i.e., 4.5 V to 5.5 V). Operation below 4.5 V violates absolute maximum ratings and results in undefined output states, increased propagation delay variation, and potential latch-up. It is incompatible with 3.3 V logic families without level-shifting circuitry.
M38510/31401B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Logic Type:
- Monostable
- Independent Circuits:
- 2
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 34 ns
- Current - Output High, Low:
- 4mA, 400µA
- Voltage - Supply:
- 4.5 V ~ 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
M38510/31401B2A FAQ
1.How can I place an order for M38510/31401B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for M38510/31401B2A 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 M38510/31401B2A reliable?
The price and inventory of M38510/31401B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38510/31401B2A is usually 5 days.
3.What payment methods are accepted for M38510/31401B2A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38510/31401B2A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38510/31401B2A?
M38510/31401B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38510/31401B2A 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 M38510/31401B2A?
For technical support, including M38510/31401B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38510/31401B2A requirements.
6.How does Aetrix verify that M38510/31401B2A is sourced from the original manufacturer or authorized distributors?
All M38510/31401B2A 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 M38510/31401B2A meets industry standards.
7.What is the process for return or replacement of M38510/31401B2A?
All M38510/31401B2A units undergo pre-shipment inspection (PSI). If there is an issue with M38510/31401B2A, 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 M38510/31401B2A part is unused and in its original packaging.
Return procedure for M38510/31401B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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