Patent ID: 7639042

Claim:
A system comprising: first operational circuitry having an operational circuitry supply voltage level; and routing receiver circuitry coupled to an input of the first operational circuitry and having a single routing receiver circuitry supply voltage level, wherein: the operational circuitry supply voltage level and the single routing receiver circuitry supply voltage level are the same; the routing receiver circuitry is configured (a) to receive a routing signal from a source having a source supply voltage level equal to the operational circuitry supply voltage level and the single routing receiver circuitry supply voltage level, and (b) to provide an input signal to the input of the first operational circuitry, wherein the voltage swing of the routing signal is less than the voltage swing of the input signal of the first operational circuitry; and at least one condition from the group consisting of the following is true: (1) the routing receiver circuitry comprises a full latch coupled to an inverter, and (2) the routing receiver circuitry comprises a low leakage input buffer coupled to an inverter.