SNJ54AS138J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SNJ54AS138J is a military-grade 3-line to 8-line decoder/demultiplexer from Texas Instruments in a 16-pin ceramic DIP package. It features two active-low and one active-high enable inputs for flexible chip selection, operating from 4.5 V to 5.5 V at 20 mA IOL across -55°C to 125°C. Designed for defense system address decoding.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SNJ54AS138J Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $10.4322(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3-line to 8-line decoder/demultiplexer with active-low decoded outputs
- Two active-low and one active-high enable inputs for flexible chip-select logic
- Schottky-clamped AS family for high-speed decoding up to 20 mA IOL
- Military ceramic DIP-16 package rated from -55°C to 125°C
- Full binary-to-octal decoding suitable for memory and I/O address selection
Applications
The SNJ54AS138J is used in military microprocessor systems for memory bank selection, I/O port address decoding, and data demultiplexing in avionics, radar, and space computer systems. Its multiple enable inputs allow straightforward expansion to larger address spaces by cascading multiple decoders in a tree structure.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | 2 ACTIVE-LOW AND 1 ACTIVE-HIGH ENABLE INPUT, SCHOTTKY-CLAMPED FOR HIGH PERFORMANCE |
| Family | AS |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 3-LINE TO 8-LINE DECODER |
| Max I(ol) | 0.02A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Polarity | INVERTED |
| Package Body Material | CERAMIC, GLASS-SEALED |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 20mA |
| Prop. Delay@Nom-Sup | 22ns |
| Propagation Delay (tpd) | 11ns |
| 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 decoding function does the SNJ54AS138J perform?
The SNJ54AS138J decodes a 3-bit binary input into one of eight mutually exclusive active-low outputs, making it ideal for address decoding in memory systems and I/O port selection in microprocessor bus designs.
How many enable inputs does the SNJ54AS138J have?
The device has three enable inputs: two active-low (G1 and G2A) and one active-high (G2B). All three must be in their correct state simultaneously for the decoder to operate, enabling easy chip-select and cascade control.
What temperature range does the SNJ54AS138J support?
The SNJ54AS138J is rated from -55°C to 125°C under military temperature specifications, making it suitable for avionics, defense ground systems, and space payload applications in extreme environments.
What is the output sink current of the SNJ54AS138J?
The decoded active-low outputs can sink up to 20 mA (IOL), providing sufficient drive capability to directly enable chip-select inputs of memory ICs, peripheral controllers, and other logic devices in the decoded address space.
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About Texas Instruments
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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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $11.7362 | $11.74 |
| 3+ | $10.9538 | $32.86 |
| 8+ | $10.4322 | $83.46 |
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