Dual-supply buffered voltage signal converter for translating a unidirectional signal

The 2N7001T, from Texas Instruments, is a single-bit buffered voltage signal converter that uses two separate configurable power-supply rails to up or down translate a unidirectional signal. The device is operational with both V_CCA and V_CCB supplies down to 1.65V and up to 3.60V. V_CCA defines the input threshold voltage on the A input. V_CCB defines the output drive voltage on the B output. This device is completely specified for partial-power-down applications using the Ioff current. The Ioff protection circuitry ensures that no excessive current is drawn from or to an input, output, or combined I/O that is biased to a specific voltage while the device is powered down. The V_CC isolation feature ensures that if either V_CCA or V_CCB is less than 100mV, the output port (B) enters a high-impedance state.