Radiation-tolerant 8-bit fixed-direction level translator with Schmitt-Trigger inputs

The SN54SC8T9541-SEP contains eight

buffers with 3-state outputs and Schmitt-Trigger inputs. The active low output enable pins

(OE1 and OE2) control all eight channels, and

are configured so that both must be low for the outputs to be active. When the outputs are

enabled, the outputs are actively driven low or high. When the outputs are disabled, the

outputs are set into the high-impedance state. The output level is referenced to the supply

voltage (VCC) and supports 1.8V, 2.5V, 3.3V, and 5V CMOS levels.

The input is designed with a lower threshold

circuit to support up translation for lower voltage CMOS inputs (for example, 1.2V input to

1.8V output or 1.8V input to 3.3V output). In addition, the 5V tolerant input pins enable

down translation (for example, 3.3V to 2.5V output).