8-bit bus transceiver for 3.3V backplane and memory-mapped I/O
The Texas Instruments SN74LVTH2245PWR is an 8-bit non-inverting transceiver with 3-state outputs from the 74LVTH series, designed for bidirectional bus communication in 3.3V systems. It operates from a 2.7V to 3.6V supply and delivers 32mA output high and 64mA output low, giving it the drive strength to handle heavily loaded backplanes or memory-mapped peripheral buses without external buffers. The part is built for industrial temperature environments (-40°C to 85°C) and comes in a 20-TSSOP package (4.40mm width), a compact footprint that fits dense PCB layouts common in telecom line cards, industrial controllers, and test equipment.
Supply voltage and output drive — what they mean for the bus
The 2.7V to 3.6V supply range means this transceiver works directly with 3.3V logic and can tolerate 2.5V rails in mixed-voltage designs without a separate level translator. The 32mA source / 64mA sink capability is the spec that determines fan-out: at 64mA sink, you can drive a 50-ohm backplane trace or feed multiple CMOS loads without signal degradation. The 12mA/12mA entry in the listing likely reflects a different test condition or typo — the primary drive figures are the 32mA and 64mA values that define the device's bus-handling capacity.