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SN74LS640NSR（74LS640） Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
SN74LS640NSR（74LS640）TI222Yes

SN74LS640NSR (74LS640)** is a bus transceiver manufactured by **Texas Instruments (TI)**.

The SN74LS640NSR (74LS640) is a bus transceiver manufactured by Texas Instruments (TI).

Specifications:

  • Logic Family: 74LS
  • Type: Octal Bus Transceiver (3-State)
  • Number of Channels: 8 (8-bit bidirectional)
  • Voltage Supply: 4.75V to 5.25V
  • Operating Temperature Range: 0°C to 70°C
  • Output Type: 3-State
  • Propagation Delay: Typically 15ns
  • Package: SOIC-20 (NSR)
  • High-Level Output Current: -2.6mA
  • Low-Level Output Current: 24mA

Descriptions:

The SN74LS640NSR is an 8-bit bidirectional bus transceiver designed for asynchronous communication between data buses. It features 3-state outputs for bus-oriented applications, allowing bidirectional data flow controlled by Direction (DIR) and Output Enable (OE) inputs.

Features:

  • Bidirectional data flow (A to B or B to A)
  • 3-state outputs for bus isolation
  • Common control inputs (DIR & OE) for direction and output enable
  • TTL-compatible inputs and outputs
  • Wide operating voltage range (4.75V to 5.25V)
  • Standard 74LS series speed and power characteristics

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

For detailed electrical characteristics, refer to the official Texas Instruments datasheet.

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