Toshiba Electronics Europe GmbH (“Toshiba”) has launched three new dual-power bus transceivers that can be used for voltage conversion in industrial, consumer, and enterprise electronics systems featuring widely used communication interfaces such as UART and SPI. The 74AVC series of bus transceivers supports both step-up and step-down voltage conversion from either of its dual power supplies in bidirectional communication systems using signal voltages between 0,8 V and 3,6 V.
To support direct voltage shifting of UART data, the 74AVC4T245FT includes four bidirectional voltage shifting circuits, allowing independent control of signal direction every 2 bits. The 74AVCH4T245FT also offers this functionality, but in addition includes a built-in bus hold feature that allows it to retain its previous output even when the input is in a high-impedance state. The 74AVC4T345FT offers 3-bit and 1-bit communications control, making it suitable for use with SPI interfaces.
The output stage of these transceivers can be placed in a high impedance state by connecting one of the power supplies or the OE input terminal to GND, while the signal direction is determined by the DIR pin.
To simplify power management, especially in legacy system designs, these devices have been designed without restrictions on the on/off sequence of the V supply terminals.CCA and VCCB. In addition, the low static current consumption (ICCA, TheCCB = 8 μA (max.)) helps to save energy.
The transceivers, which are housed in a TSSOP16B package, can operate reliably in temperatures ranging from -40°C to 125°C.
Learn more about the new dual-power bus transceivers series on Toshiba's website:
