SN74AVC8T245-Q1 - Automotive Catalog 8-Bit Dual-Supply Bus Transceiver w/ Configurable Voltage Transl., 3-State Output

The SN74AVC8T245-Q1 is an 8-bit noninverting bus transceiver that uses two separateconfigurable power-supply rails. The SN74AVC8T245-Q1 operation is optimimal withV_CCA and V_CCB set at
1.4 V to 3.6 V. It is operational with V_CCA andV_CCB as low as 1.2 V. The A port is designed to trackV_CCA. V_CCA accepts any supply voltage from 1.2 V to3.6 V. The B port is designed to track V_CCB. V_CCBaccepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectionaltranslation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVC8T245 design enables asynchronous communication between data buses. The devicetransmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logiclevel at the direction-control (DIR) input. One can use the output-enable(OE) input to disable the outputs so the buses are effectivelyisolated.

In the SN74AVC8T245 design, V_CCA supplies the control pins (DIRand OE).

This device specification covers partial-power-down applications usingI_off. The I_off circuitry disables the outputs whenthe device is powered down. This inhibits current backflow into the device which prevents damage tothe device.

The V_CC isolation feature ensures that if eitherV_CC input is at GND, both ports are in the high-impedance state.

To ensure the high-impedance state during power up or power down, tieOE to V_CC through a pullup resistor; thecurrent-sinking capability of the driver determines the minimum value of the resistor.

• Qualified for Automotive Applications
• AEC Q100 Test Guidance With the Following Results:
  • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
  • Device HBM ESD Classification Level H2
  • Device CDM ESD Classification Level C3B
• Control Inputs V_IH and V_IL Levels Are Referenced to V_CCA Voltage
• V_CC Isolation Feature – If Either V_CC Input Is at GND, All I/O Ports Are in the High-Impedance State
• I_off Supports Partial Power-Down-Mode Operation
• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.4-V to 3.6-V Power-Supply Range
• I/Os Are 4.6-V Tolerant
• Maximum Data Rates
  • 170 Mbps (V_CCA  < 1.8 V or V_CCB  < 1.8 V)
  • 320 Mbps (V_CCA  ≥ 1.8 V and V_CCB  ≥ 1.8 V)
• Latch-Up Performance Exceeds 100 mA per JESD 78, Class II

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