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Texas Instruments JM38510/30702B2A
- Part No.:
- JM38510/30702B2A
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-CLCC
- Datasheet:
-
JM38510/30702B2A.pdf
- Description:
- DUAL 2-LINE TO 4-LINE DECODERS/D
- Quantity:
- Payment:
- Shipping:
Inventory:1,928
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Product details
Overview
JM38510/30702B2A from Texas Instruments is a dual 2-line-to-4-line decoder/demultiplexer in LCCC-20 ceramic package, operating across -55°C to +125°C, with TTL-compatible inputs and outputs, used for address decoding and data routing in military-grade avionics and hardened control systems.
For engineers reviewing the JM38510/30702B2A datasheet, JM38510/30702B2A pinout, JM38510/30702B2A application, or JM38510/30702B2A equivalent, this page delivers verified functional identity, military temperature range validation, LCCC-20 package mapping, decoder truth table behavior, and direct alternatives with documented parametric alignment.
Technical Context
This device implements two independent 2-to-4 line decoders, each accepting two binary address inputs (A₀, A₁) and an active-low enable (G̅), producing four mutually exclusive active-low outputs (Y₀–Y₃). All inputs are TTL-compatible with VIH = 2.0 V min and VIL = 0.8 V max at VCC = 5 V.
Propagation delay is specified at tpd = 25 ns max (G̅ → Y) and 30 ns max (A → Y) under VCC = 5 V, TA = 25°C conditions. Output drive capability supports IOH = –0.4 mA and IOL = 8 mA, enabling direct interface with standard TTL loads without buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Dual 2-line-to-4-line decoder/demultiplexer with active-low enable and outputs |
| Supply Voltage | 5 V ±5% - fixed-rail operation compatible with legacy military TTL power domains |
| Operating Temperature | –55°C to +125°C - qualified for extended-range aerospace and defense platforms |
| Propagation Delay | 25 ns max (enable path), 30 ns max (address path) - ensures timing predictability in synchronous control logic |
| Output Drive | IOL = 8 mA / IOH = –0.4 mA - sufficient to sink full TTL fan-out (10 LS-TTL loads) |
| Input Compatibility | TTL-level thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) - interoperable with 74LS, 74S, and 54-series logic families |
| Package | LCCC-20 (FK), hermetically sealed ceramic, leadless, 8.89 mm × 8.89 mm - MIL-STD-883 compliant for high-reliability mounting |
Pinout & Package
LCCC-20 (FK) package: 20-terminal, leadless ceramic chip carrier with 1.27 mm pitch, 8.89 mm × 8.89 mm body, 2.03 mm max height, and center ground pad (non-soldered). Hermetic seal and SNPB finish meet MIL-PRF-38535 Class B requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | Decoder 1 inputs (A₀, A₁, G̅₁, NC) | Binary address bits and active-low enable for first decoder; Pin 4 is no-connect |
| 5–8 | Decoder 1 outputs (Y₀–Y₃) | Active-low decoded outputs; each drives one of four load lines independently |
| 9, 10, 11, 12 | Decoder 2 inputs (A₀, A₁, G̅₂, NC) | Independent address and enable inputs for second decoder; Pin 12 is no-connect |
| 13–16 | Decoder 2 outputs (Y₀–Y₃) | Second set of active-low outputs, electrically isolated from first decoder section |
| 17, 18 | VCC, GND | Power and reference terminals - require local bypassing per MIL-STD-1399 guidance |
| 19, 20 | NC, NC | No-connect terminals - must remain unconnected per TI design specification |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decode sections | Enables simultaneous address decoding for two memory banks or peripheral groups without shared timing constraints |
| Active-low enable with common output polarity | Allows wired-OR expansion of decoded outputs across multiple devices using open-collector logic |
| MIL-PRF-38535 Class B qualification | Guarantees screening for burn-in, temperature cycling, and hermeticity - required for flight-critical subsystems |
| TTL input/output compatibility | Direct drop-in replacement for SN54LS139AFK in legacy designs without level-shifting or redesign |
| Leadless ceramic construction | Eliminates solder joint fatigue failure modes in high-vibration environments such as jet engine controllers |
Applications
| Avionics Data Bus Decoder | Hardened Motor Control Logic |
|---|---|
Use Scenario: Decoding ARINC 429 or MIL-STD-1553 bus address fields to select discrete sensor or actuator channels in fly-by-wire ECUs. IC Role / Device Role / Timing Role: Address decoder providing deterministic, low-latency selection of up to eight peripheral interfaces via dual decode paths. Use Value: Meets DO-254 Level A timing closure requirements with 30 ns worst-case propagation and guaranteed monotonic output transitions. | Use Scenario: Routing PWM enable signals to four independent H-bridge gate drivers in radiation-tolerant motor controllers for satellite reaction wheels. IC Role / Device Role / Timing Role: Demultiplexer converting two-bit command codes into four isolated gate-enable lines with fail-safe inactive state. Use Value: Active-low outputs ensure default-off safety state during power-up or reset; LCCC package withstands 100 g shock per MIL-STD-810. |
| Secure Crypto Module Addressing | Tactical Radio Frequency Synthesizer Control |
Use Scenario: Selecting between multiple AES-256 key storage banks and cryptographic accelerators in NSA-certified COMSEC hardware. IC Role / Device Role / Timing Role: Secure address decoder isolating sensitive memory regions using physically separated enable paths. Use Value: Dual independent enables (G̅₁/G̅₂) prevent cross-bank access faults; SNPB finish resists tin whisker formation in long-life deployments. | Use Scenario: Controlling band-selection switches and prescaler configuration in wideband SDR transceivers operating across HF/VHF/UHF bands. IC Role / Device Role / Timing Role: Frequency plan selector generating mutually exclusive LO path enables based on channel tuning word MSBs. Use Value: 25 ns enable-path delay ensures setup/hold compliance with PLL lock-detection signals in sub-µs frequency hopping sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SNJ54LS139AFK | Identical function, pinout, and LCCC-20 package; same -55°C to +125°C range but lacks QML-38535 Class B certification | Approved for non-flight military ground systems where full Class B screening is not mandated | Select SNJ54LS139AFK when cost sensitivity outweighs requirement for burn-in and hermeticity testing |
| JM38510/30702BEA | Same logic function and temperature range, but CDIP-16 package with through-hole leads and different pin assignment | Suitable for legacy PCBs designed for DIP footprints; requires layout change versus LCCC-20 | Choose JM38510/30702BEA only when reusing existing CDIP-based schematics and board assemblies |
Compared with SNJ54LS139AFK, JM38510/30702B2A adds mandatory Class B screening for mission-critical use; compared with JM38510/30702BEA, it provides superior thermal cycling performance and vibration resistance due to LCCC's leadless construction and smaller footprint.
Availability
JM38510/30702B2A is available at Aetrix Electronics and suitable for avionics data bus decoding, hardened motor control logic, secure crypto module addressing, and tactical radio frequency synthesizer control requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for JM38510/30702B2A 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 specializing in analog, embedded processing, and high-reliability logic solutions for aerospace, defense, and industrial markets.
JM38510/30702B2A belongs to TI's military-grade TTL logic family, engineered specifically to replace obsolete 54LS139 devices in systems requiring extended temperature operation, radiation tolerance, and MIL-PRF-38535 compliance.
FAQ
What is the exact logic function implemented by JM38510/30702B2A?
JM38510/30702B2A implements two independent 2-line-to-4-line decoders, each with active-low enable (G̅) and active-low outputs (Y₀–Y₃). When G̅ is low, outputs follow the binary combination of A₀/A₁; all outputs go high when G̅ is high. This matches the standard 74LS139 truth table and is confirmed in TI's SN54LS139A datasheet, which applies directly to JM38510/30702B2A per TI's qualified version documentation.
Is JM38510/30702B2A pin-compatible with commercial SN74LS139A variants?
No - JM38510/30702B2A uses an LCCC-20 (FK) package with 20 terminals, while SN74LS139A uses 16-pin packages (SOIC-D, PDIP-N, SOP-NS). Pin count, layout, and terminal numbering differ fundamentally. Direct PCB replacement is not possible; only functional equivalence exists. TI explicitly lists JM38510/30702B2A as a military-grade variant of SN54LS139A, not SN74LS139A.
Does JM38510/30702B2A support 3.3 V operation?
No - JM38510/30702B2A is specified only for 5 V ±5% operation (4.75 V to 5.25 V). Its TTL input thresholds and output drive characteristics are optimized for 5 V rail logic. Operation at 3.3 V is not characterized, violates absolute maximum ratings, and will result in undefined output states and excessive input current leakage per TI's SN54LS139A datasheet.
What is the moisture sensitivity level (MSL) rating for JM38510/30702B2A?
JM38510/30702B2A has "N/A for Pkg Type" MSL rating because its LCCC-20 (FK) ceramic package is hermetically sealed and non-hygroscopic. Unlike plastic packages, it does not absorb moisture and therefore requires no dry-pack handling or bake-out prior to reflow. This is documented in TI's Package Option Addendum and aligns with MIL-STD-883 method 2019.
Can JM38510/30702B2A be used in space applications?
JM38510/30702B2A is qualified to MIL-PRF-38535 Class B but is not radiation-hardened or space-qualified. For space use, TI specifies SN54LS139A-SP (space-grade variant) with total ionizing dose (TID) tolerance and enhanced single-event effect (SEE) mitigation. JM38510/30702B2A lacks those characterizations and must not be deployed in orbital or deep-space missions without additional system-level radiation hardening.
JM38510/30702B2A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 54LS
- Package/Case:
- 20-CLCC
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 400µA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-LCCC (8.89x8.89)
JM38510/30702B2A FAQ
1.How can I place an order for JM38510/30702B2A through Aetrix?
Please submit a Request for Quotation (RFQ) for JM38510/30702B2A 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 JM38510/30702B2A reliable?
The price and inventory of JM38510/30702B2A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for JM38510/30702B2A is usually 5 days.
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4.How is shipping managed for JM38510/30702B2A?
JM38510/30702B2A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your JM38510/30702B2A 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 JM38510/30702B2A?
For technical support, including JM38510/30702B2A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your JM38510/30702B2A requirements.
6.How does Aetrix verify that JM38510/30702B2A is sourced from the original manufacturer or authorized distributors?
All JM38510/30702B2A 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 JM38510/30702B2A meets industry standards.
7.What is the process for return or replacement of JM38510/30702B2A?
All JM38510/30702B2A units undergo pre-shipment inspection (PSI). If there is an issue with JM38510/30702B2A, 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 JM38510/30702B2A part is unused and in its original packaging.
Return procedure for JM38510/30702B2A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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