SN54LS258BJ Texas Instruments Integrated Circuit (Ceramic Dual-In-Line Packages) In Stock
The SN54LS258B is a quad 2-to-1 multiplexer with tri-state outputs from Texas Instruments' LS logic family, housed in a 16-pin ceramic DIP package. Each of the 4 multiplexer sections selects between 2 data inputs in 2-bit groups, with 4 mA output sink current and 45 pF rated load capacitance, suitable for military-grade and industrial bus-routing and data-selection circuits.
- Manufacturer
- Texas Instruments
- Package
- Ceramic Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN54LS258BJ 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
What are the key features of SN54LS258BJ?
- Quad 2-to-1 multiplexer with 4 independent selection functions
- Tri-state outputs for direct bus sharing without external buffers
- LS TTL family with 5 V supply operation
- 2-bit data width per multiplexer section
- 16-pin ceramic DIP for high-reliability, military-grade applications
- 45 pF rated load capacitance for stable signal integrity
What is SN54LS258BJ used for?
The SN54LS258B is used in bus arbitration and data routing circuits in industrial controllers, military electronics, and legacy computing systems where TTL-compatible quad multiplexers are required. Its tri-state outputs allow multiple devices to share a common bus without bus contention, supporting applications in address multiplexing and parallel data selection in 5 V logic environments. The ceramic DIP package provides thermal stability and moisture resistance suited for extended operating temperature ranges in harsh-environment deployments.
What are the specifications of SN54LS258BJ?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Family | LS |
| JESD-30 Code | R-GDIP-T16 |
| JESD-609 Code | e0 |
| Load Capacitance (CL) | 45pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.004A |
| Number of Bits | 2 |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Number of Outputs | 1 |
| Output Characteristics | 3-STATE |
| 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) | 15mA |
| Prop. Delay@Nom-Sup | 21ns |
| Propagation Delay (tpd) | 24ns |
| Qualification Status | Not Qualified |
| 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 SN54LS258BJ datasheet?
SN54LS258BJ Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN54LS258BJ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many multiplexer channels does the SN54LS258BJ provide, and what data width does each handle?
The SN54LS258BJ integrates 4 independent 2-to-1 multiplexer channels, each handling a 2-bit data width. Each channel selects between two input sources based on a common select line, enabling designers to route 4 pairs of 2-bit signals onto a shared output bus using a single 16-pin IC.
Why are tri-state outputs important for the SN54LS258B in bus-sharing applications?
Tri-state outputs allow the SN54LS258B's outputs to be driven to a high-impedance state when not actively selected, preventing bus contention when multiple devices are connected to the same signal lines. This feature is essential in address multiplexing and shared memory bus designs where several ICs must share the same 4 mA-capable output lines without fighting each other.
What logic family does the SN54LS258B belong to, and what supply voltage is required?
The SN54LS258B belongs to the LS (Low-power Schottky) TTL logic family, which operates from a 5 V supply. The LS family offers reduced power consumption compared to standard TTL, while maintaining compatibility with other 5 V TTL and CMOS devices, making it a common choice for legacy system maintenance and military electronics applications.
For a military-grade digital design, what advantages does the SN54LS258B's ceramic DIP package offer over plastic DIP?
The SN54LS258BJ's ceramic DIP package provides superior hermetic sealing against moisture and corrosive gases compared to plastic DIP, which is critical for military avionics, space, and defense electronics operating in humid or high-altitude environments. Ceramic packages also offer better thermal conductivity and a wider operating temperature range, typically -55°C to +125°C.
Can the SN54LS258B interface with modern 3.3 V CMOS logic without a level translator?
The SN54LS258B is a 5 V LS TTL device and is not directly compatible with 3.3 V CMOS logic without a level translator. Its output voltage levels and input thresholds are specified for 5 V operation, so a level-shifting buffer or translator IC is needed to safely interface with 3.3 V CMOS systems that have maximum input tolerances of approximately 3.6 V.
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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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