View m74hc244 datasheet:

M74HC244 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED) HIGH SPEED: tPD = 10ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C HIGH NOISE IMMUNITY: VNIH = VNIL = 28 % VCC (MIN.) DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN) BALANCED PROPAGATION DELAYS: ORDER CODES tPLH ? tPHL PACKAGE TUBE T & R WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V DIP M74HC244B1R PIN AND FUNCTION COMPATIBLE WITH SOP M74HC244M1R M74HC244RM13TR 74 SERIES 244 TSSOP M74HC244TTR DESCRIPTION This device is designed to be used with 3 state The 74HC244 is an advanced high-speed CMOS memory address drivers, etc. OCTAL BUS BUFFER (3-STATE) fabricated with All inputs are equipped with protection circuits silicon gate C2MOS technology.