M74HC240 OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (INVERTED) HIGH SPEED: t = 10ns (TYP.) at V = 6V PD CC LOW POWER DISSIPATION: I = 4A(MAX.) at T =25C CC A HIGH NOISE IMMUNITY: V = V = 28 % V (MIN.) NIH NIL CC DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: I = I = 6mA (MIN) OH OL BALANCED PROPAGATION DELAYS: ORDER CODES t t PLH PHL PACKAGE TUBE T & R WIDE OPERATING VOLTAGE RANGE: V (OPR) = 2V to 6V DIP M74HC240B1R CC PIN AND FUNCTION COMPATIBLE WITH SOP M74HC240M1R M74HC240RM13TR 74 SERIES 240 TSSOP M74HC240TTR DESCRIPTION This device is designed to be used with 3 state The M74HC240 is an advanced high-speed memory address drivers, etc. CMOS OCTAL BUS BUFFER (3-STATE) All inputs are equipped with protection circuits 2 fabricated with silicon gate C MOS technology. against static discharge and transient excess G control input governs four BUS BUFFERs. voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/10M74HC240 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 11G Output Enable Input 2, 4, 6, 8 1A1 to 1A4 Data Inputs 9, 7, 5, 3 2Y1 to 2Y4 Data Outputs 11, 13, 15, 2A1 to 2A4 Data Inputs 17 18, 16, 14, 1Y1 to 1Y4 Data Outputs 12 19 2G Output Enable Input 10 GND Ground (0V) 20 V Positive Supply Voltage CC TRUTH TABLE INPUTS OUTPUT G An Yn LL H LH L HX Z X : Dont Care Z : High Impedance ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Supply Voltage -0.5 to +7 V CC V DC Input Voltage -0.5 to V + 0.5 V I CC V DC Output Voltage -0.5 to V + 0.5 V O CC I DC Input Diode Current 20 mA IK I DC Output Diode Current 20 mA OK I DC Output Current 35 mA O I or I DC V or Ground Current 70 mA CC GND CC P Power Dissipation 500(*) mW D T Storage Temperature -65 to +150 C stg T Lead Temperature (10 sec) 300 C L Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 C derate to 300mW by 10mW/C from 65C to 85C RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit V Supply Voltage 2 to 6 V CC V Input Voltage 0 to V V I CC V Output Voltage 0 to V V O CC T Operating Temperature -55 to 125 C op Input Rise and Fall Time V = 2.0V 0 to 1000 ns CC t , t V = 4.5V 0 to 500 ns r f CC V = 6.0V 0 to 400 ns CC 2/10