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SN74ALS646ADW from TI,Texas Instruments

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SN74ALS646ADW

Manufacturer: TI

Octal Registered Bus Transceivers with 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74ALS646ADW TI 7571 In Stock

Description and Introduction

Octal Registered Bus Transceivers with 3-State Outputs The SN74ALS646ADW 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  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package Type:** SOIC (DW)  
- **Mounting Type:** Surface Mount  
- **Output Type:** 3-State  
- **High-Level Output Current:** -2.6 mA  
- **Low-Level Output Current:** 24 mA  
- **Propagation Delay Time (Max):** 15 ns  
- **Input Capacitance:** 3 pF  

### **Descriptions and Features:**  
- Combines D-type latches and D-type flip-flops for operation as a transceiver or register.  
- Non-inverting data path.  
- 3-state outputs for bus-oriented applications.  
- Control inputs for direction and output enable.  
- Suitable for bidirectional data transfer between buses.  
- TTL-compatible inputs.  
- Typical power dissipation: 175 mW.  

For more detailed information, refer to the official TI datasheet.

Application Scenarios & Design Considerations

Octal Registered Bus Transceivers with 3-State Outputs

Alternative Part Number

  • 74ALS646ADW --: Same 74ALS646 octal transceiver/register function in a 24-pin SOIC wide package, pin-compatible with the TI device.
  • DM74ALS646AWM --: Direct functional equivalent octal bus transceiver/register in the ALS family, offered in a wide SOIC package matching the DW footprint.
  • SN74ABT646ADW --: Same pinout and function from the same vendor but in the faster ABT logic family, usable as an upgrade substitute when ALS speed is not critical.

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