onsemi / Fairchild FXLA104 / FXLA108 Automatic Direction Translators

onsemi / Fairchild FXLA108 and FXLA104 are configurable automatic direction dual-voltage supply translators for both uni-directional and bi-directional voltage translation between two logic levels. The devices allow translation between voltages as high as 3.6V to as low as 1.1V. The A port tracks the V_CCA level and the B port tracks the V_CCB level. This allows for bi-directional voltage translation over a variety of voltage levels: 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The FXLA108 and FXLA104 remain in three-state until both V_CCs reach active levels, allowing either V_CC to be powered up first. Internal power-down control circuits place the device in 3-state if either V_CC is removed. The /OE input, when HIGH, disables both the A and B ports by placing them in a 3-state condition. The /OE input is supplied by V_CCA.

The onsemi / Fairchild FXLA108 and FXLA104 support bi-directional translation without the need for a direction control pin. The two ports of the devices have automatic direction sense capability. Either port may sense an input signal and transfer it as an output signal to the other port.

Features

Bi-directional interface between two levels (from 1.1V to 3.6V)
Inputs and outputs track V_CC are fully configurable
Non-preferential power-up; either V_CC may be powered up first
Outputs remain in 3-state until active V_CC level is reached
Outputs switch to 3-state if either V_CC is at GND
Power-off protection
Bus-hold on data inputs eliminates the need for pull-up resistors

Control input (/OE) referenced to V_CCA voltage
Packaged in 20-terminal DQFN (2.5mm x 4.5mm)
Direction control not necessary
100Mbps throughput when translating between 1.8V and 2.5V
ESD protection exceeds
- 8kV HBM (per JESD22-A114 & Mil-Std 883e 3015.7)
- 2kV CDM (per ESD STM5.3)