Texas Instruments JM38510/31401BEA

Overview

JM38510/31401BEA from Texas Instruments is a retriggerable monostable multivibrator IC in the 54LS family, configured as a dual one-shot with independent A and B inputs per section, operating across –55°C to +125°C, with typical propagation delay of 25 ns at VCC = 5 V, and designed for precision timing control in radiation-tolerant military avionics systems.

For engineers reviewing the JM38510/31401BEA datasheet, JM38510/31401BEA pinout, JM38510/31401BEA application, or JM38510/31401BEA equivalent, this device delivers deterministic pulse-width generation with retriggering capability, TTL-compatible input thresholds, and CDIP-16 packaging qualified to MIL-PRF-38535 Class B standards.

Technical Context

The JM38510/31401BEA implements two independent retriggerable monostable multivibrators in a single 16-pin ceramic dual in-line package. Each section features separate trigger (A/B), reset (R), and output (Q/Q̅) terminals, with external RC timing networks determining pulse width.

It operates on a nominal 5-V supply, exhibits TTL-level input compatibility (VIH = 2.0 V min, VIL = 0.8 V max), and maintains stable timing over full military temperature range (–55°C to +125°C) without requiring external compensation.

Key Specifications

Pinout & Package

Ceramic Dual In-Line Package (CDIP), 16-pin, hermetically sealed, with 0.3-inch body width and 0.1-inch lead pitch. Pin 1 identified by notch or dot; leads are tin-lead (SNPB) finished, non-RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SNJ54LS123J and JM38510/31401BFA, the JM38510/31401BEA uniquely combines QML-38535 Class B certification, CDIP-16 socket compatibility, and documented lot-level reliability data-making it the preferred choice for flight-critical timing functions requiring audit-ready pedigree.

Availability

JM38510/31401BEA is available at Aetrix Electronics and suitable for avionics timing synchronization, radar pulse shaping, military data bus arbitration, and secure crypto module clock gating requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for JM38510/31401BEA 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, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.

The JM38510/31401BEA belongs to TI's military-grade 54LS logic family, engineered specifically for deterministic timing in safety-critical systems where parameter stability, radiation tolerance, and process traceability are mandatory.

FAQ

What is the maximum operating frequency supported by the JM38510/31401BEA?

The JM38510/31401BEA does not operate at a fixed clock frequency; instead, it generates single pulses whose minimum repeat rate depends on external RC timing components. With typical propagation delay of 25 ns and minimum pulse width of ~30 ns, the practical maximum trigger rate is approximately 15 MHz under ideal conditions. The JM38510/31401BEA datasheet specifies no upper limit on input trigger frequency beyond timing network constraints.

Does the JM38510/31401BEA support non-retriggerable mode?

No, the JM38510/31401BEA is exclusively a retriggerable monostable multivibrator. Its architecture lacks an internal mode-select feature or external pin to disable retriggering. To achieve non-retriggerable behavior, external gating logic must inhibit subsequent triggers until the current pulse completes - a technique documented in TI Application Report AB-17 for SN54/74LS123 family devices. The JM38510/31401BEA adheres strictly to this fixed functional definition.

Is the JM38510/31401BEA RoHS compliant?

No, the JM38510/31401BEA uses tin-lead (SNPB) 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 enhanced solder joint reliability in high-reliability applications. Alternate RoHS-compliant versions such as SN74LS123DR exist but lack military qualification and temperature range.

What is the purpose of Pin 8 (NC) on the JM38510/31401BEA?

Pin 8 on the JM38510/31401BEA is designated No Connect (NC) - it has no internal connection to the silicon die and must remain unconnected in circuit layout. TI's SDLS043 datasheet confirms this pin serves only mechanical alignment and thermal mass balancing in the CDIP-16 package. Routing or grounding Pin 8 may cause parasitic coupling or violate MIL-STD-883 mechanical test requirements for the JM38510/31401BEA.

Can the JM38510/31401BEA be used with capacitors larger than 1000 pF in the timing network?

Yes, the JM38510/31401BEA supports timing capacitors up to at least 10 µF, as verified in TI's SDLS043 datasheet Figure 5 and application note AB-17. Larger capacitors extend pulse width linearly (tw ≈ 0.33 × R × C) but require careful selection of low-leakage dielectric types (e.g., C0G/NP0 ceramic or film) to maintain accuracy over temperature and time. The JM38510/31401BEA's internal discharge transistor remains effective across this full range.