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SN74ALS257ADR from TI,Texas Instruments

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SN74ALS257ADR

Manufacturer: TI, TEXAS

Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74ALS257ADR TI, TEXAS 4352 In Stock

Description and Introduction

Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs The SN74ALS257ADR is a quad 2-line to 1-line data selector/multiplexer manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Technology Family:** ALS (Advanced Low-Power Schottky)
- **Supply Voltage Range:** 4.5V to 5.5V
- **Operating Temperature Range:** 0°C to 70°C
- **Package Type:** SOIC (Small Outline Integrated Circuit)
- **Package Pins:** 16
- **Logic Type:** Multiplexer
- **Number of Circuits:** 4
- **Propagation Delay Time:** 12ns (typical)
- **Output Type:** 3-State
- **Input Type:** TTL-Compatible

### **Descriptions:**
- The SN74ALS257ADR is a high-speed quad 2-line to 1-line multiplexer with 3-state outputs.
- It selects one of two data sources per output based on the select input.
- Designed for bus-oriented applications, allowing multiple outputs to be connected to a common bus.
- Features TTL-compatible inputs and outputs for easy integration with other logic families.

### **Features:**
- **Four Independent 2:1 Multiplexers:** Each with a common select input.
- **3-State Outputs:** Allows direct connection to a bus or shared line.
- **Low Power Consumption:** ALS technology ensures reduced power usage.
- **High-Speed Operation:** Typical propagation delay of 12ns.
- **Wide Operating Voltage Range:** Supports 4.5V to 5.5V operation.
- **TTL-Compatible Inputs:** Ensures compatibility with standard TTL logic levels.
- **ESD Protection:** Provides improved reliability in harsh environments.

This device is commonly used in digital systems for data routing, signal selection, and bus interfacing applications.

Application Scenarios & Design Considerations

Quadruple 2-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

Alternative Part Number

  • 74ALS257AMTCX --: Quad 2-to-1 multiplexer with 3-state outputs in the same ALS logic family, functionally equivalent to the SN74ALS257A and available in SOIC package.
  • DM74ALS257AMX --: Direct ALS-family quad 2-line to 1-line data selector/multiplexer with 3-state outputs, matching function and pinout for drop-in replacement.
  • MC74ALS257ADG --: ALS-series quad 2-to-1 multiplexer with 3-state outputs, same logic function and SOIC footprint, suitable as an alternative source.
  • 74ALS257AM --: Same 74ALS257 quad 2-to-1 multiplexer function with 3-state outputs, different package/speed grade naming, direct functional replacement.
  • MC74ACT257AD --: ACT-family quad 2-to-1 multiplexer with 3-state outputs, pin-compatible logic function and similar propagation performance.
  • 74HCT257D --: HCT-family quad 2-to-1 multiplexer with 3-state outputs, widely available alternative with compatible logic function and TTL-level inputs.

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