Fairchild Semiconductor's FXLH1T45 is a single-bit bi-directional voltage translator with guaranteed operation from 1.1 V to 3.6 V. The device interfaces processors to electronic subsystems operating at different voltages by providing both uni-directional and bi-directional translation between different voltage levels. Its 1.1 V operation is well suited for portable applications.

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The A port tracks the level of the V_CCA supply, and the B port tracks the level of the V_CCB supply. Both supplies are independent, and the device’s bushold on the data outputs eliminates the need for external pullup or pulldown resistors. The FXLH1T45 is available in a 1.0 mm x 1.45 mm 6-terminal MicroPak package, and priced at $0.208 for 1000 pieces.