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74HCT646AP Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
74HCT646APTOS272Yes

74HCT646AP** is a high-speed CMOS octal bus transceiver and register manufactured by **Toshiba (TOS)**.

The 74HCT646AP is a high-speed CMOS octal bus transceiver and register manufactured by Toshiba (TOS).

Key Specifications:

  • Logic Family: 74HCT (High-Speed CMOS with TTL compatibility)
  • Function: Octal bus transceiver with 3-state outputs
  • Number of Bits: 8-bit
  • Direction Control: Bidirectional data flow with separate input and output buses
  • Output Type: 3-state (high-impedance when disabled)
  • Operating Voltage: 4.5V to 5.5V
  • Input Compatibility: TTL-level compatible
  • Propagation Delay: Typically 18ns (at 5V)
  • Package Type: DIP-24 (Plastic Dual In-line Package)
  • Operating Temperature Range: -40°C to +85°C

Features:

  • Bidirectional Data Transfer: Allows data flow in both directions between buses.
  • Separate Control Pins: Includes DIR (direction control) and OE (output enable) for bus management.
  • Latch/Transparent Mode: Can operate as a latch or transparent buffer based on control inputs.
  • Low Power Consumption: CMOS technology ensures low static power dissipation.
  • High Noise Immunity: Improved noise margins compared to standard CMOS.

Applications:

  • Data bus interfacing
  • Bidirectional communication in microprocessors/microcontrollers
  • Memory address/data buffering
  • General-purpose logic level translation

This IC is commonly used in digital systems requiring bidirectional data transfer with registered or transparent operation.

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