SN74S157NSR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74S157NSR is a quad 2-input multiplexer from Texas Instruments in a 16-pin SOP package. It provides four independent 2-to-1 data selection functions with Schottky TTL speed and a 15 pF load capacitance rating. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74S157NSR 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 SN74S157NSR?
- Quad 2-to-1 multiplexer architecture provides 4 independent selection functions in a single 16-pin SOP package
- Schottky TTL (74S) family delivers high switching speed with propagation delays under 10 ns for time-critical bus switching applications
- RoHS-compliant green plastic package with 15 pF rated load capacitance supports high-density digital logic designs
What is SN74S157NSR used for?
The SN74S157NSR is used in data routing, bus selection, and signal switching circuits where two input sources share a common output path. It is well-suited for address multiplexing in memory systems and parallel data path selection in microprocessor interface designs. Its Schottky TTL speed makes it a reliable choice in legacy and new digital logic boards requiring fast 2-to-1 channel selection.
What are the specifications of SN74S157NSR?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | S |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | MULTIPLEXER |
| Max I(ol) | 0.02A |
| Number of Functions | 4 |
| Number of Inputs | 2 |
| Number of Outputs | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 78mA |
| Prop. Delay@Nom-Sup | 7.5ns |
| Propagation Delay (tpd) | 7.5ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the SN74S157NSR datasheet?
SN74S157NSR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74S157NSR?
Compatible alternatives and drop-in replacements for SN74S157NSR:
Multiplexer, S Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDSO16
Multiplexer, S Series, 4-Func, 2 Line Input, 1 Line Output, True Output, TTL, PDSO16
Frequently Asked Questions
How fast is the SN74S157NSR, and what propagation delay can be expected at 15 pF load?
The SN74S157NSR belongs to the 74S Schottky TTL family, which typically delivers propagation delays of 8 ns to 10 ns when driving a 15 pF load capacitance. This high switching speed makes it suitable for clock frequencies above 50 MHz in address multiplexing and fast data path selection circuits.
How many independent multiplexer channels does the SN74S157NSR provide, and what is the input configuration?
The SN74S157NSR contains 4 independent 2-to-1 multiplexer sections, each with 2 data inputs and 1 output, sharing a common select line and enable input across the 16-pin SOP package. This allows simultaneous 4-bit wide data routing from one of two 4-bit buses with a single control signal.
What supply voltage does the SN74S157NSR require, and is it compatible with 3.3 V logic systems?
The SN74S157NSR operates from a 5 V supply as a standard 74S TTL device, with output high levels of 2.7 V minimum and output low levels of 0.5 V maximum. It is not directly compatible with 3.3 V logic systems without level-shifting, making it best suited for 5 V TTL and older CMOS designs where 5 V compatibility is required.
When would a designer choose SN74S157NSR over the 74LS157 or 74HC157 alternatives?
A designer selects the SN74S157NSR over 74LS157 when faster switching speed below 10 ns is needed and over 74HC157 when guaranteed TTL input drive compatibility and lower output impedance at 20 mA sink current are required. The 74S family fills the gap between speed-optimized ECL and the broader 5 V CMOS families in high-speed TTL bus-switching applications.
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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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