SN74LVCH8T245

SN74LVCH8T245 SCES637C – AUGUST 2005 – REVISED DECEMBER 2022 SN74LVCH8T245 8-BIT Dual-Supply Bus Transceiver With Configurable Level-Shifting, Voltage Translation, and 3-State Outputs 1 Features Control inputs (DIR and OE) VIH and VIL levels are referenced to VCCA Bus hold on data inputs eliminates the need for external pullup and pulldown resistors VCC isolation Fully configurable dual-rail design Ioff supports Partial-Power-Down node operation Latch-up performance exceeds 100 mA per JESD 78, class II ESD protection exceeds JESD 22 2 Applications Personal electronics Industrial Enterprise Telecommunications 2 DIR 3 A1 22 OE 21 B1 To Seven Other Channels Logic Diagram (Positive Logic) 3 Description The SN74LVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track VCCA, which accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track VCCB, which also accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.8-V, 2.5-V, 3.3-V, and 5.5-V voltage nodes. The SN74LVCH8T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs, the A-port outputs, or place both output ports into a high-impedance state. The device transmits data from the A bus to...