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SN74AS157

Quadruple 1-of-2 Data Selectors/Multiplexers

Partnumber Manufacturer Quantity Availability
SN74AS157 75 In Stock

Description and Introduction

Quadruple 1-of-2 Data Selectors/Multiplexers The SN74AS157 is a quad 2-input multiplexer manufactured by Texas Instruments. Here are its specifications, descriptions, and features:

### **Manufacturer:**  
Texas Instruments  

### **Description:**  
The SN74AS157 is a high-speed, low-power Schottky TTL (Transistor-Transistor Logic) device that selects one of two 4-bit data sources under the control of a common select input (S). It features four independent 2-input multiplexers in a single package.

### **Key Features:**  
- **Logic Type:** Multiplexer  
- **Number of Channels:** 4  
- **Inputs per Channel:** 2  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Propagation Delay:** Typically 7.5 ns (max 12 ns)  
- **Output Type:** Standard (TTL)  
- **Operating Temperature Range:** 0°C to 70°C (commercial grade)  
- **Package Options:** PDIP (16-pin), SOIC (16-pin), CDIP (16-pin)  
- **Schottky Clamped for High Speed**  
- **Low Power Consumption:** 40 mW (typical)  

### **Applications:**  
- Data routing  
- Signal switching  
- Arithmetic logic units (ALUs)  
- Digital systems requiring multiplexing  

### **Pin Configuration (16-pin):**  
- **A0-A3:** Data Inputs (Source A)  
- **B0-B3:** Data Inputs (Source B)  
- **Y0-Y3:** Outputs  
- **S:** Select Input (Low = A, High = B)  
- **G (Enable):** Active-Low Strobe Input  

This device is part of the **74AS** series, known for its high-speed operation while maintaining compatibility with standard TTL logic levels.  

(Data sourced from Texas Instruments' official documentation.)

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