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SN74ALS645A from TI,Texas Instruments

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SN74ALS645A

Manufacturer: TI

Octal Bus Transceivers With 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74ALS645A TI 440 In Stock

Description and Introduction

Octal Bus Transceivers With 3-State Outputs The SN74ALS645A is an octal bus transceiver manufactured by Texas Instruments. Here are its key specifications, descriptions, and features:

### **Manufacturer:**  
Texas Instruments  

### **Description:**  
The SN74ALS645A is an octal bus transceiver designed for bidirectional asynchronous communication between data buses. It features non-inverting 3-state outputs and is commonly used in bus-oriented applications.  

### **Key Features:**  
- **Logic Type:** Octal Bus Transceiver  
- **Voltage Supply:** 4.5V to 5.5V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Output Type:** 3-State (Non-Inverting)  
- **Number of Channels:** 8  
- **Propagation Delay:** Typically 9ns  
- **High Output Drive:** ±24mA  
- **Input/Output Isolation:** Provided when disabled  
- **Package Options:** 20-pin PDIP, SOIC, and others  

### **Applications:**  
- Data bus buffering  
- Bidirectional data transfer  
- Memory interfacing  
- System-level signal routing  

This device is part of the ALS (Advanced Low-Power Schottky) family, offering a balance of speed and power efficiency.

Application Scenarios & Design Considerations

Octal Bus Transceivers With 3-State Outputs

Alternative Part Number

  • 74ACT645 --: Octal bus transceiver with same pinout and function; ACT family offers similar or better speed with TTL-compatible inputs.
  • MC74ACT645 --: Direct functional equivalent octal transceiver in the ACT logic family, pin-compatible with the ALS645A.
  • CD74ACT645 --: Same-function octal bus transceiver from TI's ACT family, pin-compatible and suitable as a drop-in replacement.
  • 74HCT645 --: Octal bus transceiver with identical pinout and TTL-compatible inputs, widely available alternative from a different logic family.

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