SN74LVC1T45-Q1 - Automotive Single-Bit Dual-Supply Bus Transceiver with Configurable Voltage Translation

The SN74LVC1T45-Q1 device is a single-bit, noninverting bus transceiver that uses twoseparate configurable power supply rails. The A-port is designed to trackV_CCA. V_CCA accepts any supply voltage from 1.65 V to5.5 V. The B-port is designed to track V_CCB. V_CCBaccepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltagebidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.

The SN74LVC1T45-Q1 device is a single-bit, non-inverting level translator. The fullyconfigurable dual-rail design allows each port to overate over the full 1.65-V to 5.5-V powersupply range. It is ideal for applications that need a wide bidirectional translation range.

The SN74LVC1T45-Q1 is designed so that the DIR input is powered byV_CCA.

This device is fully specified for partial-power-down applications usingI_off. The I_off circuitry disables the outputs,preventing damaging current backflow through the device when it is powered down.

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

• Qualified for Automotive Applications
• AEC-Q100 Qualified 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
• Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
• V_CC Isolation Feature – If Either V_CC Input Is at GND, Both Ports Are in the High-Impedance State
• DIR Input Circuit Referenced to V_CCA
• ±24-mA Output Drive at 3.3 V
• I_off Supports Partial-Power-Down Mode Operation
• Maximum Data Rates
  • 420 Mbps (3.3-V to 5-V Translation)
  • 210 Mbps (Translate to 3.3 V)
  • 140 Mbps (Translate to 2.5 V)
  • 75 Mbps (Translate to 1.8 V)

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