Dual-supply bus transceivers for low-voltage level shifting

Specifically, the 1-bit transceivers are: 74AVC1T45NX, 74AVCH1T45NX, 74AVC1T45FU, and 74AVCH1T45FU. And the 2-bit are: 74AVC2T45FK and 74AVCH2T45FK.

Dual-supply bus transceivers

They can be used for bidirectional level-shifting between 0.7V or 0.8V and up to 3.6V without the need for additional components. This is for simplifying communication between low-voltage SoCs and conventional-voltage industrial, consumer, and enterprise systems, says Toshiba.

The devices employ a push-pull buffer configuration for high-speed operation, including for UART, GPIO, and SPI communication interfaces.

In addition to Toshiba’s existing 4-bit products housed in TSSOP16B packages, these new smaller bit configurations come in smaller package variation. For example, the leadless XSON6, and the leaded SOT-363 (US6) and SOT-765 (US8).

“The 74AVC series supports dual power supplies without any power-on/off sequence restrictions, ” writes Toshia. “They use a directional-control method with DIR pins and a high-impedance control method with power-supply pins, which prevent contention on complex signal lines and enhance system reliability. These features simplify power-on sequence design and help reduce the risk of malfunction.”

Note that the 74AVCH series additionally includes an internal bus-hold function. This prevents undefined states and allows stable signal retention, reducing external components such as pull-up and pull-down resistors, says the company.

More information on the 74AVC dual-supply bus transceivers is on the Toshiba website.

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