The 74AVC series of bus transceivers supports up- and down-level 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 UART data voltage shifting, the 74AVC4T245FT includes four bidirectional voltage-shifting circuits, allowing independent control of the signal direction every 2 bits. The 74AVCH4T245FT also offers this functionality, but additionally includes a built-in bus hold function 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 communication 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 terminal input 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 power-on/power-off sequence of the VCCAand VCCBpower. Furthermore, the low static current consumption (ICCA,ICCB= 8 μA (max.)) helps to conserve power.
Housed in a TSSOP16B package, the transceivers can operate reliably in temperatures ranging from -40 °C to 125 °C.
More information about the new dual-feed bus transceiver series can be found on the Toshiba website:
