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SN54LS245 from NS,National Semiconductor

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SN54LS245

Manufacturer: NS, TI

OCTAL BUS TRANSCEIVER

Partnumber Manufacturer Quantity Availability
SN54LS245 NS, TI 253 In Stock

Description and Introduction

OCTAL BUS TRANSCEIVER The SN54LS245 is a bus transceiver manufactured by National Semiconductor (NS).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Technology:** TTL (Transistor-Transistor Logic)  
- **Number of Channels:** 8-bit bidirectional  
- **Operating Voltage:** 4.5V to 5.5V  
- **High-Level Output Current:** -2.6 mA  
- **Low-Level Output Current:** 24 mA  
- **Propagation Delay:** Typically 15 ns  
- **Operating Temperature Range (SN54):** -55°C to +125°C (Military grade)  
- **Package Options:** Ceramic DIP (Dual In-line Package)  

### **Descriptions:**  
The SN54LS245 is an octal bus transceiver designed for bidirectional communication between data buses. It features separate control inputs for direction (DIR) and output enable (G̅).  

### **Features:**  
- **Bidirectional Data Flow:** Controlled by the DIR pin.  
- **3-State Outputs:** Allows bus isolation when disabled.  
- **High-Current Outputs:** Capable of driving heavily loaded buses.  
- **Wide Operating Temperature Range:** Suitable for harsh environments.  
- **Low Power Consumption:** Typical of LS TTL technology.  

This information is based on the manufacturer's datasheet for the SN54LS245.

Application Scenarios & Design Considerations

OCTAL BUS TRANSCEIVER

Alternative Part Number

  • 74LS245 --: Same octal bus transceiver function with 3-state outputs, widely available and pin-compatible in commercial temperature range.
  • MC74LS245N --: Direct functional equivalent octal bus transceiver from a different manufacturer, suitable for most LS TTL bus interface designs.
  • DM74LS245N --: Equivalent LS TTL octal bus transceiver with 3-state outputs, interchangeable in typical bus driving applications.
  • MC74ACT245 --: Octal bus transceiver with similar pinout and function; ACT family offers CMOS-compatible inputs and comparable drive, a good cross-family substitute.
  • CD74HCT245 --: HCT octal bus transceiver with TTL-compatible inputs and similar pinout; lower speed but a viable functional replacement for less demanding designs.

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