SNJ54LS157J Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
Texas Instruments SNJ54LS157J is a military-grade quadruple 2-to-1 data selector/multiplexer with 4 independent channels in the 54LS logic family. Features 4 mA output sink current and 15 pF load capacitance in a 16-pin ceramic DIP package. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SNJ54LS157J Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.7500(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SNJ54LS157J?
- Quadruple 2-to-1 multiplexer with 4 independent selection channels controlled by a single common SELECT input, simplifying 4-bit bus switching in TTL systems
- 54LS military-qualified ceramic DIP-16 package (JEDEC R-GDIP-T16) rated for -55°C to +125°C operation, meeting MIL-STD requirements for avionics and defense systems
- Low-power Schottky LS family logic with 4 mA output sink current and 15 pF load capacitance, compatible with standard 5 V TTL bus interfaces in high-reliability designs
What is SNJ54LS157J used for?
The SNJ54LS157J is used in military avionics, defense communication systems, and space-qualified electronics that require a reliable 4-channel 2-to-1 data multiplexer in a ceramic hermetic package. Its single SELECT input simultaneously routes all 4 channels from one of two 4-bit data buses, making it ideal for redundancy switching in fault-tolerant control computers. The 54-series military qualification ensures consistent parametric performance across the full -55°C to +125°C temperature range required by MIL-STD-883 applications.
What are the specifications of SNJ54LS157J?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | LS |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.004A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Number of Outputs | 1 |
| Output Characteristics | OPEN-EMITTER |
| Output Polarity | TRUE |
| 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) | 16mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| 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 |
Where can I find the SNJ54LS157J datasheet?
SNJ54LS157J Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SNJ54LS157J?
Compatible alternatives and drop-in replacements for SNJ54LS157J:
Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, CDIP16
Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, CDIP16
Multiplexer, LS Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, CDIP16
Frequently Asked Questions
What temperature range does the SNJ54LS157J cover and why is the ceramic DIP package preferred over plastic for military avionics use?
The SNJ54LS157J operates from -55°C to +125°C junction temperature, which is the full military temperature grade required by MIL-STD-883. The ceramic DIP-16 (JEDEC R-GDIP-T16) package provides hermetic sealing that prevents moisture ingress under thermal cycling, altitude, and vibration conditions typical of airborne electronics. Plastic packages absorb moisture and can crack under the same conditions, so ceramic is mandatory for MIL-spec qualification in avionics and space applications.
How does the SNJ54LS157J SELECT input simultaneously control all 4 multiplexer channels, and what logic level routes input A versus input B?
The SNJ54LS157J uses a single common SELECT pin that controls all 4 channels in parallel. When SELECT is LOW (0 V to 0.8 V TTL low), all 4 outputs are connected to their respective A inputs. When SELECT is HIGH (2.0 V to 5.5 V TTL high), all 4 outputs switch simultaneously to their B inputs. This single-pin control eliminates decoding logic and allows atomic 4-bit bus switching with propagation delays under 20 ns in LS-family timing specifications.
When is SNJ54LS157J a better procurement choice than the commercial SN74LS157 for a 4-bit data selector application?
SNJ54LS157J is the preferred choice when the system must meet MIL-STD-883 or DESC drawing qualification, requiring screening at -55°C and +125°C, 100% burn-in, and lot traceability. The commercial SN74LS157 is rated only 0°C to +70°C and comes in plastic packages. For commercial industrial designs operating 0°C to +70°C, the SN74LS157 in SOIC-16 offers lower unit cost; for military programs or space-heritage designs requiring ceramic hermetic packaging and full-temperature qualification, SNJ54LS157J is the correct part number.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $3.7500 | $3.75 |
| 4+ | $3.1250 | $12.50 |
| 9+ | $2.7500 | $24.75 |
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