74LCX244 LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED: t = 6.5 ns (MAX.) at V = 3V PD CC POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: SOP TSSOP I = I = 24mA (MIN) at V = 3V OH OL CC PCI BUS LEVELS GUARANTEED AT 24 mA Table 1: Order Codes BALANCED PROPAGATION DELAYS: t t PLH PHL PACKAGE T & R OPERATING VOLTAGE RANGE: V (OPR) = 2.0V to 3.6V (1.5V Data SOP 74LCX244MTR CC Retention) TSSOP 74LCX244TTR PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 and high speed 3.3V applications it can be LATCH-UP PERFORMANCE EXCEEDS interfaced to 5V signal environment for both inputs 500mA (JESD 17) and outputs. ESD PERFORMANCE: It has same speed performance at 3.3V than 5V HBM > 2000V (MIL STD 883 method 3015) AC/ACT family, combined with a lower power MM > 200V consumption. This device is designed to be used with 3 state DESCRIPTION memory address drivers, etc. All inputs and outputs are equipped with The 74LCX244 is a low voltage CMOS OCTAL protection circuits against static discharge, giving BUS BUFFER (NON-INVERTED) fabricated with them 2KV ESD immunity and transient excess sub-micron silicon gate and double-layer metal 2 voltage. wiring C MOS technology. It is ideal for low power Figure 1: Pin Connection And IEC Logic Symbols Rev. 8 September 2004 1/1274LCX244 Figure 2: Input And Output Equivalent Circuit Table 2: Pin Description Table 3: Truth Table PIN N SYMBOL NAME AND FUNCTION INPUT OUTPUT 11G Output Enable Input G An Yn 2, 4, 6, 8 1A1 to 1A4 Data Inputs LLL 9, 7, 5, 3 2Y1 to 2Y4 Data Outputs LH H 11, 13, 15, 2A1 to 2A4 Data Inputs HX Z 17 18, 16, 14, 1Y1 to 1Y4 Data Outputs X : Dont Care Z : High Impedance 12 19 2G Output Enable Input 10 GND Ground (0V) 20 V Positive Supply Voltage CC Table 4: Absolute Maximum Ratings Symbol Parameter Value Unit V Supply Voltage -0.5 to +7.0 V CC V DC Input Voltage -0.5 to +7.0 V I V DC Output Voltage (OFF State) -0.5 to +7.0 V O V DC Output Voltage (High or Low State) (note 1) -0.5 to V + 0.5 V O CC I DC Input Diode Current - 50 mA IK I DC Output Diode Current (note 2) - 50 mA OK I DC Output Current 50 mA O I DC Supply Current per Supply Pin 100 mA CC I DC Ground Current per Supply Pin 100 mA GND 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 1) I absolute maximum rating must be observed O 2) V < GND O 2/12