LOW POWER SCHOTTKY The SN74LS257B is a quad 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. Below are its specifications, descriptions, and features:
### **Specifications:**
- **Logic Family:** LS (Low-Power Schottky)
- **Number of Channels:** 4 (Quad)
- **Input Lines per Channel:** 2
- **Output Lines per Channel:** 1
- **Supply Voltage Range:** 4.75V to 5.25V (Nominal 5V)
- **Propagation Delay:** Typically 15ns
- **Operating Temperature Range:** 0°C to 70°C
- **Package Type:** 16-pin DIP (Dual In-line Package), SOIC (Small Outline IC)
- **Output Type:** 3-State (High, Low, High-Impedance)
### **Descriptions:**
- The SN74LS257B is a multiplexer that selects one of two data inputs (A or B) based on the select (S) input.
- It features 3-state outputs, allowing multiple devices to share a common bus.
- Designed for high-speed, low-power digital logic applications.
### **Features:**
- **Quad 2-to-1 Multiplexer:** Four independent multiplexers in a single package.
- **3-State Outputs:** Enables bus-oriented applications.
- **Low Power Consumption:** Typical power dissipation of 32mW.
- **TTL-Compatible Inputs/Outputs:** Works with standard TTL logic levels.
- **Common Select Line:** Single select input controls all four multiplexers.
- **High-Speed Operation:** Fast switching for efficient data routing.
This device is commonly used in digital systems for data routing, signal selection, and bus interfacing.
