View 74lvc245a datasheet:

74LVC245A LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER (NOT INVERTED) HIGH PERFORMANCE 5V TOLERANT INPUTS HIGH SPEED: tPD = 6.3ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V SOP TSSOP PCI BUS LEVELS GUARANTEED AT 24 mA BALANCED PROPAGATION DELAYS: tPLH ? tPHL ORDER CODES OPERATING VOLTAGE RANGE: VCC(OPR) = 1.65V to 3.6V (1.2V Data PACKAGE TUBE T & R Retention) SOP 74LVC245AM 74LVC245AMTR PIN AND FUNCTION COMPATIBLE WITH TSSOP 74LVC245ATTR 74 SERIES 245 LATCH-UP PERFORMANCE EXCEEDS 500mA (JESD 17) direction of data transmission is determined by ESD PERFORMANCE: DIR input. The enable input G can be used to HBM > 2000V (MIL STD 883 method 3015); disable the device so that