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SN74LS645-1N Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
SN74LS645-1NTI109Yes

SN74LS645-1N** is a bidirectional octal bus transceiver manufactured by **Texas Instruments (TI)**.

The SN74LS645-1N is a bidirectional octal bus transceiver manufactured by Texas Instruments (TI).

Key Specifications:

  • Logic Family: 74LS
  • Type: Octal Bus Transceiver
  • Direction Control: Bidirectional (DIR pin controls data flow)
  • Voltage Supply: 4.75V to 5.25V (5V nominal)
  • Operating Temperature Range: 0°C to 70°C (commercial grade)
  • Package: 20-pin PDIP (Plastic Dual In-Line Package)
  • Output Type: 3-State (high-impedance when disabled)
  • Propagation Delay: Typically 15ns (max 25ns)
  • Input Current (High/Low): ±0.25mA / ±0.4mA
  • Output Current (High/Low): -0.4mA / 8mA

Descriptions:

The SN74LS645-1N is designed for asynchronous two-way communication between data buses. It features separate input and output pins for each data line, controlled by the Direction (DIR) pin. When enabled, data flows from A to B or B to A based on the DIR signal.

Features:

  • Bidirectional Data Flow (controlled by DIR pin)
  • 3-State Outputs (allows bus sharing)
  • High-Speed Operation (compatible with TTL logic)
  • Wide Operating Voltage Range (4.75V–5.25V)
  • Low Power Consumption (typical 32mW)
  • 20-Pin DIP Package (easy PCB mounting)

This device is commonly used in microprocessor systems, data routing, and bus interfacing applications.

For detailed electrical characteristics, refer to the official TI datasheet.

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