This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.2 V to 3.6 V. The SN74AVC4T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
●The SN74AVC4T245 device is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
●The SN74AVC4T245 device is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by VCCA.
●This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
●The VCC isolation feature ensures that if either VCC input is at GND, then both ports are in the high-impedance state.
●To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
● Control Inputs VIH/VIL Levels Are
●Referenced to VCCA Voltage
● Fully Configurable Dual-Rail Design Allows Each Port to Operate
●Over the Full 1.2-V to 3.6-V Power-Supply Range
● I/Os Are 4.6-V Tolerant
● Ioff Supports Partial Power-Down-Mode Operation
● Maximum Data Rates
● 380 Mbps (1.8-V to 3.3-V Translation)
● 200 Mbps (< 1.8-V to 3.3-V Translation)
● 200 Mbps (Translate to 2.5 V or 1.8 V)
● 150 Mbps (Translate to 1.5 V)
● 100 Mbps (Translate to 1.2 V)
● Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
● ESD Protection Exceeds JESD 22
● 8000-V Human-Body Model (A114-A)
● 150-V Machine Model (A115-A)
● 1000-V Charged-Device Model (C101)
