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SN74ALS646ADWR from TI,Texas Instruments

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SN74ALS646ADWR

Manufacturer: TI

Octal Registered Bus Transceivers with 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74ALS646ADWR TI 1002 In Stock

Description and Introduction

Octal Registered Bus Transceivers with 3-State Outputs The SN74ALS646ADWR is a 3-state octal bus transceiver and register manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** Octal Bus Transceiver/Register  
- **Number of Bits:** 8  
- **Voltage Supply:** 4.5V to 5.5V  
- **Operating Temperature:** 0°C to 70°C  
- **Package Type:** SOIC (20-pin)  
- **Output Type:** 3-State  
- **Propagation Delay:** 12ns (max)  
- **Input/Output Compatibility:** TTL  

### **Descriptions:**  
- Combines D-type latches and transceivers for bidirectional data transfer.  
- Features separate control inputs for data flow direction (DIR) and output enable (OE).  
- Can store data using internal registers.  

### **Features:**  
- **Bidirectional Data Flow:** Controlled by DIR input.  
- **3-State Outputs:** Allows bus isolation.  
- **Latch Enable (LE) Input:** Controls data storage in registers.  
- **Wide Operating Voltage:** Compatible with 5V systems.  
- **High-Speed Operation:** Suitable for bus-oriented applications.  

This device is commonly used in data buffering, bus interfacing, and register-based applications.

Application Scenarios & Design Considerations

Octal Registered Bus Transceivers with 3-State Outputs

Alternative Part Number

  • 74ALS646ADW --: Same 74ALS646 octal transceiver/register function in a wide-body SOIC package, pin-compatible with the TI DW version.
  • 74ALS646ADWRG4 --: TI's own 74ALS646A in the same wide SOIC package with tape-and-reel packaging, functionally identical to the original.
  • SN74ALS646ANT --: Same 74ALS646A octal bus transceiver/register from TI in a PDIP package, suitable when through-hole mounting is acceptable.

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