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SN74HCT645DW from TI,Texas Instruments

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SN74HCT645DW

Manufacturer: TI

Octal Bus Transceivers With 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74HCT645DW TI 4 In Stock

Description and Introduction

Octal Bus Transceivers With 3-State Outputs The SN74HCT645DW is a bus transceiver manufactured by Texas Instruments (TI). Here are its specifications, descriptions, and features:  

### **Specifications:**  
- **Logic Type:** Octal Bus Transceiver  
- **Technology:** HCT (High-Speed CMOS, TTL-Compatible)  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Input Logic Level:** TTL-Compatible  
- **Output Logic Level:** CMOS  
- **Number of Channels:** 8  
- **Direction Control:** Bidirectional (DIR pin controls data flow)  
- **Output Drive Capability:** ±6mA at 5V  
- **Propagation Delay:** 18ns (typical)  
- **Package Type:** SOIC (DW)  
- **Pin Count:** 20  

### **Descriptions:**  
The SN74HCT645DW is an octal bus transceiver designed for asynchronous communication between data buses. It features non-inverting 3-state outputs and bidirectional data flow controlled by the DIR (Direction) pin. When the Output Enable (OE) pin is active low, the outputs are enabled.  

### **Features:**  
- **Bidirectional Data Flow:** Controlled by the DIR pin.  
- **3-State Outputs:** Allows bus isolation when disabled.  
- **TTL-Compatible Inputs:** Works with TTL logic levels.  
- **Wide Operating Voltage Range:** 4.5V to 5.5V.  
- **Balanced Propagation Delays:** Ensures reliable data transmission.  
- **Low Power Consumption:** Typical ICC of 80µA.  
- **ESD Protection:** Exceeds 2000V per JESD 22.  

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

Application Scenarios & Design Considerations

Octal Bus Transceivers With 3-State Outputs

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