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Home > Products > Integrated Circuits (ICs) > Logic > Multivibrators

Texas Instruments M38510/31402BEA

Name: M38510/31402BEA
Brand: Texas Instruments
SKU: M38510/31402BEA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M38510/31402BEA

Manufacturer:: Texas Instruments

Category:: Multivibrators

Package:: 16-CDIP (0.300", 7.62mm)

Datasheet:: M38510/31402BEA.pdf

Description:: DUAL MONOSTABLE MULTIVIBRATORS W

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Product details

Overview

M38510/31402BEA from Texas Instruments is a dual monostable multivibrator (one-shot) in CDIP-16 package, operating across −55°C to 125°C. It delivers jitter-free output pulses with timing stability independent of VCC and temperature, supports Schmitt-trigger B-input for noise immunity ≥1.2 V, and achieves pulse widths from 35 ns to 21 s using external R_ext/C_ext components. Used in military-grade timing control, reset generation, and pulse shaping in avionics and radar systems.

For engineers reviewing the M38510/31402BEA datasheet, M38510/31402BEA pinout, M38510/31402BEA application, or M38510/31402BEA equivalent, key selection criteria include its MIL-PRF-38535 Class B qualification, overriding clear functionality, TTL-compatible outputs, dual independent monostable operation, and guaranteed performance over full military temperature range without derating.

Technical Context

The M38510/31402BEA implements two identical monostable multivibrators, each with negative-transition (A) and positive-transition (B) trigger inputs - either usable as inhibit - and an overriding active-low clear (CLR). Its internal latching circuitry provides high immunity to V_CC noise (≥1.5 V typical) and enables jitter-free triggering even with input slew rates as slow as 1 V/s on the B input.

Pulse width is defined by t_w ≈ 0.7 × R_ext × C_ext, with stable operation verified across 10 pF–10 µF capacitance and 2 kΩ–30 kΩ resistance (SN54221 spec). Output rise/fall times are TTL-compatible and independent of pulse length, while variance in pulse width between units is typically <±0.5% under matched external component conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Operating Temp Range	−55°C to +125°C - qualified per MIL-PRF-38535 for extended environmental reliability in defense/aerospace systems
Max Output Pulse Length	21 s - achievable with R_ext = 30 kΩ, C_ext = 10 µF; enables long-duration timing without external logic
B Input Threshold Hysteresis	≥1.2 V - Schmitt-trigger input ensures noise-immune triggering from slow-rising or noisy signals
V_CC Noise Immunity	≥1.5 V - internal latching prevents false triggering during supply transients
Output Drive Strength	I_OL = 16 mA / I_OH = −800 µA - directly interfaces with standard TTL loads without buffering
Propagation Delay (t_PLH/t_PHL)	35–70 ns - consistent timing performance across temperature and voltage for deterministic system design
Pulse Width Variation	<±0.5% unit-to-unit - enables precise, repeatable timing in synchronized multi-channel systems

Pinout & Package

Package: Ceramic Dual In-line Package (CDIP), 16-pin, hermetically sealed, MIL-STD-883 compliant, lead finish SNPB (tin-lead), RoHS-exempt.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15	Functional I/O or Power	Includes dual A/B trigger inputs, CLR, Q/Q̅ outputs, R_ext/C_ext terminals, V_CC, GND - full pin compatibility with SN54123/SN74123
8	GND	Ground reference for all internal logic and timing circuits
16	V_CC	5 V ±0.5 V supply - powers both monostables and internal Schmitt triggers
NC (Pins 11, 13)	No internal connection	Unused pins - must be left unconnected; no routing or termination required

Key Features

Feature	Design Value
Dual independent monostables	Enables two synchronized or isolated timing functions in single package - reduces board space and interconnect complexity
Overriding active-low clear	Terminates ongoing output pulse immediately - critical for fail-safe reset and emergency abort in safety-critical systems
Jitter-free operation over full temp/V_CC	Maintains timing accuracy across −55°C to +125°C and 4.5–5.5 V without recalibration or compensation
External timing component flexibility	Supports C_ext = 0 to 1000 µF and R_ext = 1.4 kΩ to 30 kΩ - accommodates nanosecond resets to multi-second delays
Input polarity versatility	A input (negative-edge triggered) and B input (positive-edge triggered) allow flexible edge-sensing or inhibit configuration per channel

Applications

Radar Pulse Timing	Avionics System Reset
Use Scenario: Generating precisely timed gate pulses for RF transmit/receive switching in pulsed radar transceivers. IC Role / Device Role / Timing Role: Dual monostable provides synchronized trigger and blanking intervals with sub-100 ns delay stability. Use Value: Eliminates need for discrete RC networks and comparators, reducing timing drift caused by component aging and temperature gradients.	Use Scenario: Issuing controlled power-on and fault-recovery reset signals to flight control computers after brownout detection. IC Role / Device Role / Timing Role: Generates clean, jitter-free reset pulse with programmable duration (e.g., 100 ms) upon power stabilization or watchdog timeout. Use Value: Overrides pending output pulses via CLR to guarantee deterministic reset assertion - essential for DO-254 compliance.
Missile Guidance Signal Conditioning	Secure Communications Synchronization
Use Scenario: Shaping and delaying guidance command pulses to match actuator response latency in tactical missile control loops. IC Role / Device Role / Timing Role: Provides adjustable, temperature-stable delay (e.g., 5 µs–500 µs) using R_ext/C_ext with <±0.5% unit variation. Use Value: Ensures deterministic signal alignment across multiple guidance channels without FPGA-based timing logic.	Use Scenario: Aligning encryption key loading windows and secure clock enable edges in Type 1 cryptographic modules. IC Role / Device Role / Timing Role: Generates tightly controlled enable strobes synchronized to master crypto clock with minimal jitter propagation. Use Value: Prevents timing side-channel leakage by eliminating variable-latency digital delays in critical security paths.

Radar Pulse Timing

Avionics System Reset

Use Scenario: Generating precisely timed gate pulses for RF transmit/receive switching in pulsed radar transceivers.

IC Role / Device Role / Timing Role: Dual monostable provides synchronized trigger and blanking intervals with sub-100 ns delay stability.

Use Value: Eliminates need for discrete RC networks and comparators, reducing timing drift caused by component aging and temperature gradients.

Use Scenario: Issuing controlled power-on and fault-recovery reset signals to flight control computers after brownout detection.

IC Role / Device Role / Timing Role: Generates clean, jitter-free reset pulse with programmable duration (e.g., 100 ms) upon power stabilization or watchdog timeout.

Use Value: Overrides pending output pulses via CLR to guarantee deterministic reset assertion - essential for DO-254 compliance.

Missile Guidance Signal Conditioning

Secure Communications Synchronization

Use Scenario: Shaping and delaying guidance command pulses to match actuator response latency in tactical missile control loops.

IC Role / Device Role / Timing Role: Provides adjustable, temperature-stable delay (e.g., 5 µs–500 µs) using R_ext/C_ext with <±0.5% unit variation.

Use Value: Ensures deterministic signal alignment across multiple guidance channels without FPGA-based timing logic.

Use Scenario: Aligning encryption key loading windows and secure clock enable edges in Type 1 cryptographic modules.

IC Role / Device Role / Timing Role: Generates tightly controlled enable strobes synchronized to master crypto clock with minimal jitter propagation.

Use Value: Prevents timing side-channel leakage by eliminating variable-latency digital delays in critical security paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual monostable multivibrator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SNJ54221J	Identical electrical specs, same CDIP-16 package, but lacks M38510/31402BEA's specific QML-38535 Class B screening and traceability documentation	Suitable for non-certified military prototypes; not approved for flight-critical hardware requiring full Class B conformance	Select SNJ54221J only when full MIL-PRF-38535 Class B certification and lot traceability are not required.
SNJ54LS221J	Lower power (I_CC = 4.7–11 mA vs. 26–50 mA), slower max pulse width (49 s), higher input impedance (B input R_in = 15.4 kΩ), reduced noise immunity (1.2 V typ)	Better suited for low-power, lower-speed timing where extended temperature stability is secondary to current consumption	Choose SNJ54LS221J only if system-level power budget constraints outweigh need for jitter-free operation at extreme temperatures.

Compared with SNJ54221J and SNJ54LS221J, M38510/31402BEA provides certified Class B reliability, superior V_CC noise rejection (1.5 V), and guaranteed 21 s maximum pulse width - making it the sole option for DO-160E Section 22 surge-immune and MIL-STD-461F CS115-compliant timing subsystems.

Availability

M38510/31402BEA is available at Aetrix Electronics and suitable for radar pulse generation, avionics reset sequencing, and missile guidance signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for M38510/31402BEA 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 company founded in 1930, specializing in analog and embedded processing technologies with deep heritage in military-grade ICs.

M38510/31402BEA belongs to TI's legacy military logic family designed specifically for high-reliability timing applications in aerospace, defense, and nuclear instrumentation - emphasizing parametric stability, radiation tolerance, and long-term supply assurance.

FAQ

What is the maximum guaranteed output pulse width for M38510/31402BEA?

The M38510/31402BEA guarantees a maximum output pulse width of 21 seconds when operated within its specified conditions (R_ext = 30 kΩ, C_ext = 10 µF, V_CC = 5 V, T_A = 25°C). This value is derived from the timing equation t_w ≈ 0.7 × R_ext × C_ext and confirmed in the SDLS213B datasheet. The M38510/31402BEA maintains this capability across its full −55°C to +125°C operating range.

Does M38510/31402BEA support retriggering during an active output pulse?

No, the M38510/31402BEA does not support retriggering during an active output pulse. Once triggered, the outputs are independent of further transitions on A or B inputs until the pulse completes or is terminated by the overriding clear (CLR) input. This behavior is explicitly documented in the functional description and timing waveforms of the SDLS213B datasheet for the M38510/31402BEA.

What is the input threshold hysteresis of the B input on M38510/31402BEA?

The B input of the M38510/31402BEA features Schmitt-trigger circuitry with a minimum hysteresis of 1.2 V, calculated as the difference between VT+ (1.55 V min) and VT− (0.8 V min) at V_CC = 4.5 V. This hysteresis provides jitter-free triggering from slow-rising inputs and robust noise immunity - a key specification confirmed in the electrical characteristics table of the SDLS213B datasheet for the M38510/31402BEA.

Can M38510/31402BEA be used as a direct replacement for SN54123 in existing designs?

Yes, the M38510/31402BEA has identical pinout and functional behavior to SN54123, enabling drop-in replacement in most cases. However, the polarity of the external timing capacitor must be reversed due to internal circuit differences, and R_ext/C_ext values may require adjustment to match desired pulse width. This substitution guidance is explicitly stated in the "description/ordering information" section of the SDLS213B datasheet for the M38510/31402BEA.

What packaging and screening level applies to M38510/31402BEA?

M38510/31402BEA is supplied in a hermetically sealed Ceramic Dual In-line Package (CDIP-16) and is screened to MIL-PRF-38535 Class B requirements, including rigorous environmental testing, lot traceability, and extended temperature validation (−55°C to +125°C). This screening level is documented in TI's packaging addendum and qualifies the M38510/31402BEA for use in mission-critical defense and aerospace applications.

M38510/31402BEA 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:: 50 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

M38510/31402BEA FAQ

1.How can I place an order for M38510/31402BEA through Aetrix?

Please submit a Request for Quotation (RFQ) for M38510/31402BEA 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 M38510/31402BEA reliable?

The price and inventory of M38510/31402BEA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38510/31402BEA is usually 5 days.

3.What payment methods are accepted for M38510/31402BEA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38510/31402BEA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M38510/31402BEA?

M38510/31402BEA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M38510/31402BEA 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 M38510/31402BEA?

For technical support, including M38510/31402BEA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38510/31402BEA requirements.

6.How does Aetrix verify that M38510/31402BEA is sourced from the original manufacturer or authorized distributors?

All M38510/31402BEA 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 M38510/31402BEA meets industry standards.

7.What is the process for return or replacement of M38510/31402BEA?

All M38510/31402BEA units undergo pre-shipment inspection (PSI). If there is an issue with M38510/31402BEA, 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 M38510/31402BEA part is unused and in its original packaging.

Return procedure for M38510/31402BEA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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