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SN74HC640DW from TI,Texas Instruments

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SN74HC640DW

Manufacturer: TI

Octal Bus Transceivers With 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74HC640DW TI 13 In Stock

Description and Introduction

Octal Bus Transceivers With 3-State Outputs The SN74HC640DW is a bus transceiver manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on Ic-phoenix technical data files:  

### **Specifications:**  
- **Logic Type:** Octal Bus Transceiver  
- **Technology:** CMOS  
- **Supply Voltage Range:** 2V to 6V  
- **Operating Temperature Range:** -40°C to 85°C  
- **Output Type:** 3-State  
- **Number of Channels:** 8  
- **Package Type:** SOIC (DW)  
- **Mounting Type:** Surface Mount  
- **High-Level Output Current:** -7.8 mA  
- **Low-Level Output Current:** 7.8 mA  
- **Propagation Delay Time:** 12 ns (typical at 5V)  

### **Descriptions:**  
The SN74HC640DW is an octal bus transceiver designed for asynchronous two-way communication between data buses. It features non-inverting 3-state outputs and is compatible with most TTL and CMOS logic families. The direction of data flow is controlled by the DIR (direction control) input, while the OE (output enable) input disables the outputs when high.  

### **Features:**  
- **Wide Operating Voltage Range:** 2V to 6V  
- **High-Current 3-State Outputs:** Drive up to 15 LSTTL Loads  
- **Low Power Consumption:** 80 µA (Max) ICC  
- **Balanced Propagation Delays:** tPLH ≈ tPHL  
- **Bidirectional Data Flow:** Controlled by DIR input  
- **ESD Protection:** Exceeds JESD 22 (2000-V Human-Body Model)  

This device is commonly used in bus-oriented systems, data communication, and buffering applications.  

(End of factual information.)

Application Scenarios & Design Considerations

Octal Bus Transceivers With 3-State Outputs

Alternative Part Number

  • MC74HC640ADWR2G --: Same 74HC640 octal inverting bus transceiver function in a SOIC-20 wide package, direct pin-compatible logic equivalent from a second source.
  • CD74HC640E --: TI's own 74HC640 transceiver in a PDIP-20 package, same logic family and function, suitable when a through-hole footprint is acceptable.
  • 74HC640D,653 --: Nexperia 74HC640 octal inverting transceiver in SOIC-20, functionally and pin compatible with the SN74HC640DW.

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