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SN74AS157NSR from TI,Texas Instruments

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SN74AS157NSR

Manufacturer: TI, TEXAS

QUADRUPLE 1-OF-2 DATA SELECTORS/MULTIPLEXERS

Partnumber Manufacturer Quantity Availability
SN74AS157NSR TI, TEXAS 4520 In Stock

Description and Introduction

QUADRUPLE 1-OF-2 DATA SELECTORS/MULTIPLEXERS The SN74AS157NSR is a quadruple 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** Data Selector/Multiplexer  
- **Number of Circuits:** 4  
- **Number of Inputs:** 2  
- **Output Type:** Standard  
- **Supply Voltage (VCC):** 4.5V to 5.5V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package / Case:** SOP-16  
- **Mounting Type:** Surface Mount  
- **Propagation Delay Time:** 7.5 ns (max)  
- **High-Level Output Current:** -15 mA  
- **Low-Level Output Current:** 48 mA  

### **Descriptions:**  
The SN74AS157NSR is a high-speed TTL logic device that selects one of two data sources based on the select input. It features four independent 2-input multiplexers and is designed for high-performance digital systems.  

### **Features:**  
- **High-Speed Operation:** Optimized for fast switching applications.  
- **Common Select Input:** Single select line controls all four multiplexers.  
- **Wide Operating Voltage:** Supports 4.5V to 5.5V operation.  
- **Low Power Consumption:** Designed for efficient power usage.  
- **Schottky-Clamped Inputs:** Improves noise immunity and switching performance.  
- **Balanced Propagation Delays:** Ensures consistent timing across outputs.  

This device is commonly used in data routing, signal gating, and digital system design.

Application Scenarios & Design Considerations

QUADRUPLE 1-OF-2 DATA SELECTORS/MULTIPLEXERS

Alternative Part Number

  • CD74ACT157M --: Quad 2-to-1 multiplexer in the same function family with ACT logic, SOIC package, direct functional replacement for the AS157 multiplexer.
  • MC74ACT157DR2G --: Pin-compatible quad 2-input multiplexer with ACT speed grade, widely available SOIC alternative to the AS157NSR.
  • 74ACT157SC --: Standard 74ACT157 quad multiplexer in SOIC, functionally equivalent and a common cross-brand substitute for the AS157NSR.
  • 74F157APC --: Quad 2-to-1 multiplexer with the same function and pinout, offering comparable speed and a different series/prefix for easy distinction.
  • MC74ACT157ADG --: Quad 2-to-1 data selector/multiplexer with similar logic function and pinout, using a different series naming for clear differentiation.
  • CD74ACT157E --: Same manufacturer's quad 2-to-1 multiplexer in a different logic family, functionally equivalent with compatible pinout.

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