This 16-bit (dual-octal) noninverting bus transceiver is designed for 2.7-V to 3.6-V VCC operation.
The SN74LVCR162245 is designed forasynchronous communication between data buses. The control-function implementation minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable OE input can be used to disable the device so that the buses are effectively isolated.
All outputs, which are designed to sink up to 12 mA, include 26-Ω resistors to reduce overshoot and undershoot.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. The bus-hold circuitry is part of the input circuit and is not disabled by OE or DIR.
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.
Member of the Texas Instruments Widebus™ Family
Operates From 2.7 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 8.5 ns at 3.3 V
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot) >2 V at VCC = 3.3 V, TA = 25°C
Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
All Outputs Have Equivalent 26-Ω Series Resistors, So No External Resistors Are Required
Latch-Up Performance Exceeds 250 mA Per JEDEC Standard JESD-17