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 LVTH126 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 low.
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 device is 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 GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing 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.
|Part number||Order||Technology Family||VCC (Min) (V)||VCC (Max) (V)||Channels (#)||IOL (Max) (mA)||IOH (Max) (mA)||ICC (uA)||Input type||Output type||Features||Data rate (Mbps)||Rating||Operating temperature range (C)||Package Group|
Ultra high speed (tpd <5ns)
Partial power down (Ioff)
Over-voltage tolerant inputs
Power up 3-state
|320||Catalog||-40 to 85||
SOIC | 14
SO | 14
SSOP | 14
TSSOP | 14
TVSOP | 14