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Texas Instruments M38510/31401BEA
- Part No.:
- M38510/31401BEA
- Manufacturer:
- Texas Instruments
- Category:
- Multivibrators
- Package:
- 16-CDIP (0.300", 7.62mm)
- Datasheet:
-
M38510/31401BEA.pdf
- Description:
- RETRIGGERABLE MONOSTABLE MULTIVI
- Quantity:
- Payment:
- Shipping:
Inventory:1,809
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Product details
Overview
M38510/31401BEA from Texas Instruments is a retriggerable monostable multivibrator IC used for precise pulse generation and timing control in military-grade digital systems. It features dual independent monostable circuits, TTL-compatible inputs and outputs, 16-pin CDIP (J) package, -55°C to +125°C operating temperature range, and supports retriggering during output pulse duration - enabling reliable debouncing and event synchronization in avionics and radar subsystems.
For engineers reviewing the M38510/31401BEA datasheet, M38510/31401BEA pinout, M38510/31401BEA application, or M38510/31401BEA equivalent, this device delivers deterministic one-shot timing with external RC control, high noise immunity in harsh environments, and QML-38510 Class B qualification for mission-critical embedded timing functions.
Technical Context
The M38510/31401BEA implements two identical retriggerable monostable multivibrators in a single IC. Each section uses Schmitt-trigger inputs for noise rejection and provides complementary Q and Q̅ outputs. Timing is set externally via resistor and capacitor connected to the RC pins, with pulse width determined by τ ≈ 0.33 × R × C.
It operates from a single 5 V supply, meets MIL-STD-883 requirements for screening and testing, and maintains stable propagation delay (tPLH/tPHL ≤ 35 ns typical at VCC = 5 V) across its full temperature range. Input thresholds are TTL-compatible, and outputs drive standard TTL loads directly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual retriggerable monostable multivibrator - enables continuous pulse extension during input activity, critical for glitch suppression and signal conditioning. |
| Supply Voltage | 5 V ± 0.5 V - fixed-rail operation compatible with legacy military TTL logic families without regulation overhead. |
| Operating Temperature | -55°C to +125°C - qualified per MIL-PRF-38535 for use in airborne, space-qualified, and ground vehicle electronics. |
| Propagation Delay | ≤ 35 ns (typical) - ensures tight timing margins in high-speed synchronous control circuits. |
| Output Drive | IOH/ IOL = -0.4 mA / 8 mA - sufficient to directly interface with multiple 74LS/TTL inputs without buffering. |
| Timing Control | External RC network (R = 2 kΩ–100 kΩ, C = 10 pF–10 µF) - allows programmable pulse widths from ~10 ns to >1 s with predictable repeatability. |
Pinout & Package
Package: 16-pin Ceramic Dual In-line Package (CDIP), hermetically sealed, J-lead configuration, 0.3-inch wide body, lead material SNPB (tin-lead), non-RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 10, 11, 12, 13, 14, 15 | Input/Output signals (A1, B1, Q1, Q̅1, CLR1, A2, B2, Q2, Q̅2, CLR2, RC1, RC2) | Standard TTL-level control and timing terminals - pins 1–6 and 10–15 map to dual monostable sections with independent trigger, clear, output, and RC connections. |
| 7 | GND | Signal reference and power return - must be low-inductance connection to minimize switching noise coupling. |
| 16 | VCC | +5 V power supply - requires local 0.1 µF ceramic decoupling adjacent to pin for transient current handling. |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable operation | Allows new trigger pulses to restart timing cycle before prior output expires - essential for synchronizing variable-rate events like encoder pulses or switch closures. |
| Independent clear inputs | Asynchronous reset per section (CLR1/CLR2) enables forced output termination - used for emergency stop or mode switching in real-time controllers. |
| Complementary outputs | Q and Q̅ outputs provide both active-high and active-low timing signals - eliminates need for external inverters in dual-edge detection circuits. |
| MIL-STD-883 qualified | Screened to Method 5005 (steady-state life), Method 5007 (thermal cycling), and Method 5011 (bond strength) - ensures reliability in extended-life defense platforms. |
| TTL-compatible thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V - guarantees interoperability with legacy 74-series logic without level-shifting. |
Applications
| Radar Pulse Shaping | Avionics Watchdog Timer |
|---|---|
Use Scenario: Generating precisely timed gate pulses for RF transmit/receive switching in pulse-Doppler radar front-ends. IC Role / Device Role / Timing Role: Monostable section 1 generates fixed-duration enable pulse synchronized to master clock; section 2 provides delayed inhibit signal for T/R isolation. Use Value: Ensures <10 ns timing jitter between transmit and receive windows, preventing self-interference and meeting MIL-STD-461E emission limits. |
Use Scenario: Monitoring microprocessor activity in flight control computers to detect lockup and initiate safe recovery. IC Role / Device Role / Timing Role: One-shot triggered by periodic CPU heartbeat signal; missing pulse asserts system reset via Q̅ output. Use Value: Provides fail-safe response within 100 µs of fault detection, satisfying DO-254 Level A timing assurance requirements. |
| Missile Guidance Signal Conditioning | Secure Communication Sync Generator |
Use Scenario: Debouncing mechanical switch inputs from seeker gimbal position sensors under high-vibration launch conditions. IC Role / Device Role / Timing Role: Dual monostables filter contact bounce on azimuth/elevation limit switches using RC time constants tuned to >5 ms. Use Value: Eliminates false limit triggers during 20 g vibration profiles, maintaining guidance loop integrity per MIL-STD-810G. |
Use Scenario: Generating synchronized clock enable windows for cryptographic key loading in secure data links. IC Role / Device Role / Timing Role: Retriggerable monostable extends enable pulse across consecutive encrypted packet bursts, ensuring uninterrupted key stream alignment. Use Value: Maintains bit-level timing coherence across burst-mode transmissions, preventing decryption failure in NSA-certified Type 1 devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar retriggerable monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS123J | Identical electrical specs and pinout; same CDIP-16 package, but marked per JAN specification instead of QML-38510. | Approved for military use but lacks QML-38510 Class B certification documentation traceability. | Select when full QML pedigree is not required and cost sensitivity is higher. |
| M38510/31401BFA | Same functionality and temperature range, but packaged in 16-pin CFP (W) instead of CDIP (J); different thermal resistance and mounting method. | Suitable for surface-mount hybrid assemblies where hermetic ceramic flatpack is preferred over through-hole DIP. | Select when board assembly uses CFP-compatible reflow or wave solder processes and footprint constraints prohibit CDIP. |
Compared with SNJ54LS123J and M38510/31401BFA, the M38510/31401BEA provides guaranteed QML-38510 Class B conformance with full lot traceability and extended burn-in, making it the only choice for programs requiring DoD ASSIST-registered component verification.
Availability
M38510/31401BEA is available at Aetrix Electronics and suitable for radar pulse shaping, avionics watchdog timer, missile guidance signal conditioning, and secure communication sync generator applications requiring stable component supply across long-lifecycle defense programs.
Supply support for M38510/31401BEA 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 and embedded processing technologies, with decades of experience delivering radiation-tolerant and military-qualified components.
The M38510/31401BEA belongs to TI's legacy military logic family designed specifically for high-reliability timing functions in aerospace, defense, and nuclear instrumentation systems where deterministic behavior under extreme environmental stress is mandatory.
FAQ
What is the maximum recommended RC timing capacitor value for M38510/31401BEA?
The M38510/31401BEA supports timing capacitors up to 10 µF when used with appropriate series resistance to limit charging current. Larger values risk exceeding internal current limits during RC discharge cycles, potentially degrading pulse width accuracy or causing premature wear in high-cycle applications. Always verify stability with actual layout parasitics in final design.
Does M38510/31401BEA support non-retriggerable operation?
No - the M38510/31401BEA is exclusively a retriggerable monostable multivibrator. Its architecture does not include a non-retriggerable mode; attempting to suppress retriggering requires external gating logic. For non-retriggerable behavior, consider discrete implementation or alternate parts like SN74LS221.
Is M38510/31401BEA RoHS compliant?
No - the M38510/31401BEA uses SNPB (tin-lead) lead finish and is explicitly marked "No" for RoHS compliance in TI's packaging documentation. It is intended for legacy military systems where Pb-based soldering remains standard and exempt under RoHS Annex III.
Can M38510/31401BEA drive a 50-Ω transmission line directly?
No - the M38510/31401BEA output stage is rated for standard TTL loads (≤ 10 LS-TTL inputs), not 50-Ω impedance matching. Driving coaxial lines requires external line drivers or resistive termination. Direct connection causes signal reflection, overshoot, and timing uncertainty beyond spec limits.
What is the minimum pulse width achievable with M38510/31401BEA?
The shortest stable pulse width is approximately 10 ns, achieved using minimal RC values (e.g., R = 2 kΩ, C = 10 pF) and verified under worst-case voltage/temperature conditions. Sub-10 ns operation is not characterized and may exhibit inconsistent triggering or reduced noise margin.
M38510/31401BEA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 16-CDIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 16-CDIP
M38510/31401BEA FAQ
1.How can I place an order for M38510/31401BEA through Aetrix?
Please submit a Request for Quotation (RFQ) for M38510/31401BEA 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 M38510/31401BEA reliable?
The price and inventory of M38510/31401BEA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38510/31401BEA is usually 5 days.
3.What payment methods are accepted for M38510/31401BEA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38510/31401BEA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38510/31401BEA?
M38510/31401BEA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38510/31401BEA 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 M38510/31401BEA?
For technical support, including M38510/31401BEA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38510/31401BEA requirements.
6.How does Aetrix verify that M38510/31401BEA is sourced from the original manufacturer or authorized distributors?
All M38510/31401BEA 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 M38510/31401BEA meets industry standards.
7.What is the process for return or replacement of M38510/31401BEA?
All M38510/31401BEA units undergo pre-shipment inspection (PSI). If there is an issue with M38510/31401BEA, 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 M38510/31401BEA part is unused and in its original packaging.
Return procedure for M38510/31401BEA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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