This dual-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 1.65 V to 5.5 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.
●The SN74LVC2T45 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input activate either the B-port outputs or the A-port outputs. 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 always is active and must have a logic HIGH or LOW level applied to prevent excess ICC and ICCZ.
●The SN74LVC2T45 is designed so that the DIR input circuit is 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, both ports are in the high-impedance state. NanoFree™ package technology is a major breakthrough in IC packaging concepts, using the die as the package.
● Available in the Texas Instruments NanoFree™ Package
● Fully Configurable Dual-Rail Design Allows Each Port to
●Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
● VCC Isolation Feature – If Either VCC
●Input Is at GND, Both Ports Are in the High-Impedance State
● DIR Input Circuit Referenced to VCCA
● Low Power Consumption, 10-µA Max ICC
● ±24-mA Output Drive at 3.3 V
● Ioff Supports Partial-Power-Down Mode Operation
● Max 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)
● Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
● ESD Protection Exceeds JESD 22
● 4000-V Human-Body Model (A114-A)
● 200-V Machine Model (A115-A)
● 1000-V Charged-Device Model (C101)
