SNJ54LS139AJ Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SNJ54LS139AJ is a military-grade dual 2-line to 4-line decoder/demultiplexer from Texas Instruments 54LS CMOS logic family. It features Schottky-clamped inputs for high-speed performance and a 16-pin ceramic DIP package rated for extended temperature ranges. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SNJ54LS139AJ Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual independent 2-to-4 line decoder/demultiplexer with active-low outputs for flexible logic routing
- Schottky-clamped TTL inputs for high switching speed and guaranteed noise immunity
- Military-grade 16-pin ceramic DIP package (R-CDIP-T16) suitable for harsh-environment and high-reliability designs
- 15 pF load capacitance with 4-mA output current, compatible with standard 54LS logic family interfaces
Applications
The SNJ54LS139AJ is used in military and aerospace digital logic systems where dual address decoding or memory chip-select generation is required. It serves as a demultiplexer in data routing circuits, bus-expansion architectures, and programmable logic applications demanding Schottky-speed performance. Its ceramic package and extended temperature tolerance make it ideal for avionics, radar, and other defense electronics.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | SCHOTTKY CLAMPED FOR HIGH PERFORMANCE |
| Family | LS |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-CDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | 2-LINE TO 4-LINE DECODER |
| Max I(ol) | 0.004A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Output Polarity | INVERTED |
| Package Body Material | CERAMIC, METAL-SEALED COFIRED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 10mA |
| Prop. Delay@Nom-Sup | 33ns |
| Propagation Delay (tpd) | 38ns |
| Qualification Status | Not Qualified |
| Screening Level | MIL-PRF-38535 |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | MILITARY |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Ceramic Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What logic function does the SNJ54LS139AJ perform?
The SNJ54LS139AJ implements dual 2-line to 4-line decoding, where each half independently decodes a 2-bit binary address into one of four active-low outputs. This makes it ideal for memory bank selection, address decoding, and demultiplexing in digital logic systems.
What package does the SNJ54LS139AJ use and what are its electrical ratings?
The SNJ54LS139AJ is housed in a 16-pin ceramic dual-in-line package (R-CDIP-T16) with a 15 pF load capacitance and 4-mA maximum output low current, making it fully compatible with standard 54LS logic family fan-out requirements.
Is the SNJ54LS139AJ suitable for military and aerospace applications?
Yes, the SNJ54LS139AJ is a military-grade device with a ceramic package designed for high-reliability and extended temperature range environments typical of aerospace, defense, and avionics systems where plastic packages are not permitted.
What does the Schottky-clamped feature mean for the SNJ54LS139AJ?
Schottky clamping prevents transistor saturation, which dramatically reduces storage time and improves switching speed. This makes the SNJ54LS139AJ significantly faster than standard TTL logic, achieving high performance in time-critical decoding and demultiplexing applications.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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