3.3-V ABT 16-BIT BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

The LVTH162244 devices are 16-bit Buffers and Line Drivers designed for low-voltage (3.3-V) V CC operation, but with the capability to provide a TTL Interface to a 5-V system environment. These devices CAN be used as four 4-bit Buffers two 8-bit Buffers or one 16-bit Buffer These devices provide true outputs and symmetrical active-low output-enable ( OE ) inputs. The outputs, which are designed to source or sink up to 12 mA, include equivalent 22- series resistors to reduce overshoot and undershoot. Active bus-hold circuitry holds unused or undriven inputs at a valid Logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended. When V CC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to V CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. These devices are fully specified for hot-insertion applications using I off and power-up 3-state. The I off circuitry disables the outputs, preventing damaging current backflow through the devices when they are powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict. By Texas Instruments