SN74LVCH8T245PWR

SN74LVCH8T245PWR is the TSSOP-24 (PW) tape-and-reel code for the TI SN74LVCH8T245, an 8-bit dual-supply bus transceiver with bus-hold on the A-port inputs. Separate port supplies let the A and B sides sit in different voltage domains for byte-wide level translation between processors and peripherals, while the bus-hold circuitry keeps undriven A inputs at their last valid state - removing both the floating-bus errors and the external pull-up or pull-down resistors a plain transceiver would need on a bus that can be tri-stated. Selection advice: choose the LVCH version over the plain SN74LVC8T245 when the A-side bus can be left floating by a powered-down or removable module; if every driver is always present and terminated, the bus-hold is unnecessary and the LVC version is the simpler qualified choice. Check the interaction between the bus-hold and any strong external pull resistors on the same nets during design review, and match the full PWR code to fix the TSSOP-24 footprint and reel packing. Parameters verified against Texas Instruments documentation.