SN74AXC4T774-Q1

• AEC-Q100 Qualified for Automotive Applications
• Fully Configurable Dual-Rail Design Allows Each Port to Operate with a Power Supply Range from 0.65 V to 3.6 V
• Operating Temperature from –40°C to +125°C
• Independent Direction Control Pins to Allow Configurable Up and Down Translation
• Glitch-Free Power Supply Sequencing
• Up to 310 Mbps Support when Translating from 1.8 V to 3.3 V
• V_CC Isolation Feature:
  • If Either V_CC Input is Below 100 mV, All I/Os Outputs are Disabled and Become High-Impedance
• I_off Supports Partial-Power-Down Mode Operation
• Compatible with AVC Family Level Shifters
• Latch-Up Performance Exceeds 100 mA per JESD 78, Class II
• ESD Protection Exceeds JEDEC JS-001
  • 8000-V Human-Body Model
  • 1000-V Charged-Device Model

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The SN74AXC4T774-Q1 is a four-bit non-inverting bus transceiver that uses two individually configurable power-supply rails. The device is operational with both V_CCA and V_CCB supplies as low as 0.65 V. The A port is designed to track V_CCA, which accepts any supply voltage from 0.65 V to 3.6 V. The B port is designed to track V_CCB, which also accepts any supply voltage from 0.65 V to 3.6 V. Additionally the SN74AXC4T774-Q1 is compatible with a single-supply system.

The SN74AXC4T774-Q1 device is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level of the direction-control inputs (DIRx). The output-enable input (OE) is used to disable the outputs so the buses are effectively isolated. The SN74AXC4T774-Q1 device is designed so the control pins (DIRx and OE) are referenced to V_CCA.

To ensure the high-impedance state of the level shifter I/Os during power up or power down, the OE pin should be tied to V_CCA through a pullup resistor.

This device is fully specified for partial-power-down applications using the I_off current. The I_off protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down.

The V_CC isolation feature ensures that if either V_CCA or V_CCB is less than 100 mV, both I/O ports are set to the high-impedance state by disabling their outputs.

Glitch-free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.