SN74157N3 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
Texas Instruments SN74157N3 is a quad 2-to-1 TTL data selector/multiplexer in a 16-pin DIP package with four independent channels and a common select input. It operates over 0°C to 70°C commercial temperature range and drives 15 pF loads with 16 mA output sink current. Available from stock worldwide with competitive pricing.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74157N3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74157N3?
- Four independent 2-to-1 multiplexer channels in a single 16-pin DIP enable high-density data routing on through-hole boards
- Common active-low select and enable inputs reduce bus arbitration logic overhead in TTL-based data path designs
- 16 mA output sink current at standard TTL voltage levels ensures compatibility with legacy 5 V discrete and ASIC interfaces
What is SN74157N3 used for?
The SN74157N3 is ideal for data bus routing and channel switching in legacy TTL-based industrial control systems, embedded test fixtures, and retro computing hardware where through-hole assembly is required. Its quad multiplexer architecture allows a single IC to select between two 4-bit data buses under a single control signal, simplifying PCB layout in address decoders and bus arbiters. It is also widely used in educational electronics labs and hobbyist projects requiring 5 V TTL multiplexing without surface-mount constraints.
What are the specifications of SN74157N3?
| Pbfree Code | No |
| YTEOL | 0 |
| Family | TTL/H/L |
| JESD-30 Code | R-PDIP-T16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.016A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Number of Outputs | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 48mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| ## SN74157N3 Alternates Showing results | Image |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74157N3 datasheet?
SN74157N3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74157N3?
Compatible alternatives and drop-in replacements for SN74157N3:
suggested
Multiplexer, TTL/H/L Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDIP16
Frequently Asked Questions
How many data channels can SN74157N3 switch, and what is the channel configuration?
The SN74157N3 contains 4 independent 2-to-1 multiplexer channels, each selecting between two single-bit inputs and routing the selected bit to one output. A single active-low SELECT pin controls all 4 channels simultaneously, making it straightforward to switch an entire 4-bit bus between two sources with one control signal.
What output drive capability does SN74157N3 provide for driving downstream TTL loads?
Each output on the SN74157N3 can sink up to 16 mA at the standard TTL low-level output voltage, rated with a load capacitance of 15 pF. This drive strength is sufficient to directly interface with multiple standard TTL inputs or low-power Schottky (LS) devices on 5 V logic buses without external buffers.
Which board designs are most appropriate for using SN74157N3 over its surface-mount SOIC equivalents?
The SN74157N3 in its 16-pin PDIP package is best suited for through-hole PCB designs, prototyping boards, breadboard evaluation, and repair-part applications where hand-soldering or socketed insertion is required. Industrial control panels and test equipment with DIP sockets that already accommodate 0.3-inch wide 16-pin DIPs are natural fits, whereas high-density surface-mount designs should prefer the SN74157D SOIC variant.
What is the operating temperature range of SN74157N3 for commercial system designs?
The SN74157N3 is specified for a commercial operating temperature range of 0°C to 70°C, making it suitable for indoor industrial panels, office automation equipment, and consumer electronics environments. For applications requiring wider temperature coverage, the SN74157N military-grade or extended-temperature variants may be more appropriate.
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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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