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SN74LS621N from MOT,Motorola

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SN74LS621N

Manufacturer: MOT, TI

OCTAL BUS TRANSCEIVERS

Partnumber Manufacturer Quantity Availability
SN74LS621N MOT, TI 35 In Stock

Description and Introduction

OCTAL BUS TRANSCEIVERS The SN74LS621N is a 20-pin DIP (Dual Inline Package) octal bus transceiver manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Number of Bits:** 8 (Octal)  
- **Direction Control:** Bidirectional  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Input/Output Compatibility:** TTL (Transistor-Transistor Logic)  
- **Propagation Delay:** Typically 15ns  
- **Output Current (High/Low):** ±2.6mA / 24mA  
- **Package Type:** PDIP (Plastic Dual Inline Package)  

### **Description:**  
The SN74LS621N is an octal bus transceiver designed for bidirectional data transfer between two buses. It features separate input and output controls for each direction, allowing flexible data flow management.  

### **Features:**  
- **Bidirectional Data Flow:** Controlled by DIR (Direction) input.  
- **Independent Enable Inputs:** OE (Output Enable) for each bus.  
- **Low Power Consumption:** Typical of LS series.  
- **TTL-Compatible Inputs/Outputs:** Ensures compatibility with standard TTL logic.  
- **Wide Operating Voltage Range:** Supports standard 5V logic systems.  

This device is commonly used in microprocessor and digital systems for bus interfacing.

Application Scenarios & Design Considerations

OCTAL BUS TRANSCEIVERS

Alternative Part Number

  • DM74LS621N --: Same 74LS621 octal bus transceiver function in a standard DIP-20 package, pin-compatible and electrically equivalent.
  • 74LS621N --: Direct functional equivalent of the 74LS621 bus transceiver with identical logic family and DIP-20 pinout.
  • MC74LS621N --: Same LS-series octal bus transceiver in DIP-20, suitable drop-in replacement with matching electrical characteristics.
  • SN74LS645N --: Similar octal bus transceiver in the same LS family and DIP-20 package; pinout and control logic differ slightly, so verify the board wiring before substituting.

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