Texas Instruments SN74LVTH125DBR

Buffer/Line Driver 4-CH Non-Inverting 3-ST BiCMOS 14-Pin SSOP T/R
IC, QUAD BUS BUFFER, SMD, SSOP14; Logic Device Type:Buffer, Non Inverting; Supply Voltage Range:2.7V to 3.6V; Logic Case Style:SSOP; No. of Pins:14; Operating Temperature Range:-40°C to 85°C; SVHC:No SVHC (20-Jun-2011); Base Number:74; Logic Function Number:74125; Logic IC Base Number:74125; Logic IC Family:LVTH; Logic IC Function:Quadruple Bus Buffers (3-State); Operating Temperature Max:85°C; Operating Temperature Min:-40°C; Package / Case:SSOP; Supply Voltage:3.3V; Supply Voltage Max:3.6V; Supply Voltage Min:2.7V; Termination Type:SMD
These bus buffers are designed specifically for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. The ’LVTH125 devices feature independent line drivers with 3-state outputs. Each output is in the high-impedance state when the associated output-enable (OE) input is high. 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 VCC 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 VCC 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 Ioff and power-up 3-state. The Ioff 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.