the aip74lvc/lvch8t245 are 8-bit dual supply translating transceivers with 3-state outputs that enable bidirectional level translation. they feature two data input-output ports (pins an and bn), a direction control input (dir), an output enable input and dual supply pins (vcc(a) and vcc(b)). both vcc(a) and vcc(b) can be supplied at any voltage between 1.2v and 5.5v making the device suitable for translating between any of the low voltage nodes (1.2v, 1.5v, 1.8v, 2.5v, 3.3v and 5.0v). pins are referenced to vcc(a) and pins bn are referenced to vcc(b). a high on dir allows transmission from an to bn and a low on dir allows transmission from bn to an. the output enable input can be used to disable the outputs so the buses are effectively isolated.
the devices are fully specified for partial power-down applications using ioff. the ioff circuitry disables the output, preventing any damaging backflow current through the device when it is powered down. in suspend mode when either vcc(a) or vcc(b) are at gnd level, both a port and b port are in the high-impedance off-state.
active bus hold circuitry in the aip74lvch8t245 holds unused or floating data inputs at a valid logic level.
wide supply voltage range:
vcc(a): 1.2v to 5.5v
vcc(b): 1.2v to 5.5v
maximum data rates:
420mbps (3.3v to 5.0v translation)
210mbps (translate to 3.3v)
140mbps (translate to 2.5v)
75mbps (translate to 1.8v)
60mbps (translate to 1.5v)
±24ma output drive (vcc=3.0v)
inputs accept voltages up to 5.5v
low power consumption: 30ua maximum icc
ioff circuitry provides partial power-down mode operation
specified from -40℃ to 105℃
packaging information: tssop24/dhvqfn24