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Texas Instruments SN74AXC8T245/Q1 8-Bit Dual-Supply Bus Transceivers

Texas Instruments SN74AXC8T245/Q1 8-Bit Dual-Supply Bus Transceivers determine voltage level mismatch between 0.7V-0.9V devices and 1.8V, 2.5V, and 3.3V standard devices. Using two independent power-supply rails (VCCA and VCCB), the SN74AXC8T245 can operate as low as 0.65V. Supply voltage from 0.65V to 3.6V is accepted in data pins A1 through A8, designed to monitor VCCA. B1 through B8 data pins track VCCB, which allows 0.65V to 3.6V supply voltage. Developed for asynchronous communication between data buses, the SN74AXC8T245 transmits data from the A bus to the B bus or from the B bus to the A bus. This feature depends on the logic level of the direction-control inputs (DIR1 and DIR2).

The device is fully specified for partial-power-down applications using Ioff circuitry. The Ioff circuitry disables the outputs when the device is powered down and inhibits current backflow into the device, which prevents damage. Additionally, the VCC isolation feature safeguards that if either VCC input supply is below 100mV, all level shifter outputs are disabled and placed into a high-impedance state. The Texas Instruments SN74AXC8T245/Q1 are AEC-Q100 Qualified for automotive applications.

Features

  • A fully configurable dual-rail design allows each port to operate with a power supply range from 0.65V to 3.6V
  • Operating temperature from –40°C to +125°C
  • Multiple direction control pins to allow simultaneous up and down translation
  • Partial power-down mode to limit backflow current in a power-down scenario
  • Up to 380Mbps support when both VCCA and VCCB are at least 1.8V
  • AEC-Q100 qualified for automotive applications
  • VCC isolation feature to effectively isolate both buses in a power-down scenario
  • Compatible with SN74AVC8T245 and 74AVC8T245 level shifters
  • Latch-up performance exceeds 100mA Per JESD 78, Class II
  • ESD protection exceeds JESD 22
    • 8000V human-body model
    • 1000V charged-device model

Applications

  • Enterprise and communications
  • Industrial
  • Personal electronics
  • Wireless infrastructure
  • Building automation
  • Point of Sale (POS)

Block Diagram

Block Diagram - Texas Instruments SN74AXC8T245/Q1 8-Bit Dual-Supply Bus Transceivers

Evaluation Module

Texas Instruments SN74AXC8T245EVM Evaluation Module

Supports the 8-channel SN74AXC8T245, Bidirectional Translation Device.

Learn Moreo Texas Instruments SN74AXC8T245EVM Evaluation Module View Productspowiązany z Texas Instruments SN74AXC8T245EVM Evaluation Module
Opublikowano: 2018-04-03 | Zaktualizowano: 2022-11-17