A voltage translator circuit is disclosed herein that eliminates the need
for two supply voltages to achieve voltage translation through the use of
supplying a shifted voltage threshold. Effectively, this voltage
translator circuit has very little supply current (Icc) after the device
switches. Specifically, the voltage translator in accordance with the
present invention includes a first and second inverter coupled in series
between an input node and an output node. A third inverter connects
between the output node and a fourth inverter. A first circuit portion
that establishes the low-to-high switching point connects between the
fourth inverter and the first inverter. A second circuit portion connects
between the fourth and first inverter that will block the switching
current from draining the voltage supply after the transition from
low-to-high has occurred. This solution addresses the increase in supply
current (delta Icc) for each input that is at one of the specified TTL
voltage levels rather than GND or VCC while having just one supply
voltage.