74LCX244 LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS n 5V TOLERANT INPUTS AND OUTPUTS n HIGH SPEED : t = 6.5 ns (MAX.) at V = 3V PD CC n POWER DOWN PROTECTION ON INPUTS AND OUTPUTS n SYMMETRICAL OUTPUT IMPEDANCE: |I | = I = 24mA (MIN) at V = 3V SOP TSSOP OH OL CC n PCI BUS LEVELS GUARANTEED AT 24 mA n BALANCED PROPAGATION DELAYS: t @ t ORDER CODES PLH PHL n OPERATING VOLTAGE RANGE: PACKAGE TUBE T & R VCC(OPR) = 2.0V to 3.6V (1.5V Data SOP 74LCX244M 74LCX244MTR Retention) TSSOP 74LCX244TTR n PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 and high speed 3.3V applications; it can be n LATCH-UP PERFORMANCE EXCEEDS interfaced to 5V signal environment for both inputs 500mA (JESD 17) and outputs. n 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. The 74LCX244 is a low voltage CMOS OCTAL All inputs and outputs are equipped with BUS BUFFER (NON-INVERTED) fabricated with protection circuits against static discharge, giving sub-micron silicon gate and double-layer metal them 2KV ESD immunity and transient excess wiring C2MOS technology. It is ideal for low power voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS March 2002 1/9

74LCX244 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE PIN No SYMBOL NAME AND FUNCTION INPUT OUTPUT 1 1G Output Enable Input G An Yn 2, 4, 6, 8 1A1 to 1A4 Data Inputs L L L 9, 7, 5, 3 2Y1 to 2Y4 Data Outputs L H H 11, 13, 15, 2A1 to 2A4 Data Inputs H X Z 17 X : Don’t Care 18, 16, 14, 1Y1 to 1Y4 Data Outputs Z : High Impedance 12 19 2G Output Enable Input 10 GND Ground (0V) 20 V Positive Supply Voltage CC ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCC Supply Voltage -0.5 to +7.0 V VI DC Input Voltage -0.5 to +7.0 V VO DC Output Voltage (OFF State) -0.5 to +7.0 V VO DC Output Voltage (High or Low State) (note 1) -0.5 to VCC + 0.5 V IIK DC Input Diode Current - 50 mA IOK DC Output Diode Current (note 2) - 50 mA IO DC Output Current – 50 mA ICC DC Supply Current per Supply Pin – 100 mA IGND DC Ground Current per Supply Pin – 100 mA Tstg Storage Temperature -65 to +150 °C TL Lead Temperature (10 sec) 300 °C 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 2/9

74LCX244 RECOMMENDED OPERATING CONDITIONS Symbol Parameter Value Unit VCC Supply Voltage (note 1) 2.0 to 3.6 V VI Input Voltage 0 to 5.5 V VO Output Voltage (OFF State) 0 to 5.5 V VO Output Voltage (High or Low State) 0 to VCC V IOH, IOL High or Low Level Output Current (VCC = 3.0 to 3.6V) – 24 mA IOH, IOL High or Low Level Output Current (VCC = 2.7V) – 12 mA Top Operating Temperature -55 to 125 °C dt/dv Input Rise and Fall Time (note 2) 0 to 10 ns/V 1) Truth Table guaranteed: 1.5V to 3.6V 2) V from 0.8V to 2V at V = 3.0V IN CC DC SPECIFICATIONS Test Condition Value Symbol Parameter -40 to 85 °C -55 to 125 °C Unit V CC (V) Min. Max. Min. Max. V High Level Input IH 2.0 2.0 V Voltage 2.7 to 3.6 V Low Level Input IL 0.8 0.8 V Voltage VOH High Level Output 2.7 to 3.6 IO=-100 m A VCC-0.2 VCC-0.2 Voltage 2.7 IO=-12 mA 2.2 2.2 V IO=-18 mA 2.4 2.4 3.0 IO=-24 mA 2.2 2.2 VOL Low Level Output 2.7 to 3.6 IO=100 m A 0.2 0.2 Voltage 2.7 IO=12 mA 0.4 0.4 V IO=16 mA 0.4 0.4 3.0 IO=24 mA 0.55 0.55 I Input Leakage I Current 2.7 to 3.6 VI = 0 to 5.5V – 5 – 5 m A I Power Off Leakage off Current 0 VI or VO = 5.5V 10 10 m A I High Impedance OZ V = V or V Output Leakage 2.7 to 3.6 I IH IL – 5 – 5 m A V = 0 to V Current O CC ICC QCuurieresnctent Supply 2.7 to 3.6 VI = VCC or GND 10 10 m A VI or VO= 3.6 to 5.5V – 10 – 10 D ICC ICC incr. per Input 2.7 to 3.6 VIH = VCC - 0.6V 500 500 m A 3/9

74LCX244 DYNAMIC SWITCHING CHARACTERISTICS Test Condition Value Symbol Parameter V TA = 25 °C Unit CC (V) Min. Typ. Max. VVOOLLPV DOyuntpaumt i(cn Lootew 1 L)evel Quiet 3.3 VIL =C 0LV =, V5I0Hp =F 3.3V -00..88 V 1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state. AC ELECTRICAL CHARACTERISTICS Test Condition Value Symbol Parameter -40 to 85 °C -55 to 125 °C Unit V C R t = t CC L L s r (V) (pF) (W ) (ns) Min. Max. Min. Max. t t Propagation Delay 2.7 1.5 7.5 1.5 8.2 PLH PHL 50 500 2.5 ns Time 3.0 to 3.6 1.5 6.5 1.5 7.1 t t Output Enable Time 2.7 1.5 9.0 1.5 10.5 PZL PZH 50 500 2.5 ns 3.0 to 3.6 1.5 8.0 1.5 9.2 t t Output Disable Time 2.7 1.5 8.0 1.5 9.2 PLZ PHZ 50 500 2.5 ns 3.0 to 3.6 1.5 7.0 1.5 7.7 t Output To Output 3.0 to 3.6 50 500 2.5 1.0 1.0 ns OSLH t Skew Time (note1, OSHL 2) 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either HIGH or LOW (t = | t - t |, t = | t - t |) OSLH PLHm PLHn OSHL PHLm PHLn 2) Parameter guaranteed by design CAPACITIVE CHARACTERISTICS Test Condition Value Symbol Parameter V TA = 25 °C Unit CC (V) Min. Typ. Max. CIN Input Capacitance 3.3 VIN = 0 to VCC 6 pF COUT Output Capacitance 3.3 VIN = 0 to VCC 10 pF C Power Dissipation Capacitance 3.3 f = 10MHz 34 PD IN pF (note 1) V = 0 or V IN CC 1) C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without PD load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. I = C x V x f + I /8 (per circuit) CC(opr) PD CC IN CC 4/9

74LCX244 TEST CIRCUIT TEST SWITCH tPLH, tPHL Open tPZL, tPLZ 6V t , t GND PZH PHZ CL = 50 pF or equivalent (includes jig and probe capacitance) R = R1 = 500W or equivalent L R = Z of pulse generator (typically 50W ) T OUT WAVEFORM 1 : PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/9

74LCX244 WAVEFORM 2 : OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/9

74LCX244 SO-20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 C 0.5 0.020 c1 45° (typ.) D 12.60 13.00 0.496 0.512 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 F 7.40 7.60 0.291 0.300 L 0.50 1.27 0.020 0.050 M 0.75 0.029 S 8° (max.) PO13L 7/9

74LCX244 TSSOP20 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 1.2 0.047 A1 0.05 0.15 0.002 0.004 0.006 A2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 6.4 6.5 6.6 0.252 0.256 0.260 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 BSC 0.0256 BSC K 0° 8° 0° 8° L 0.45 0.60 0.75 0.018 0.024 0.030 A A2 K L A1 b e c E D E1 PIN 1 IDENTIFICATION 1 0087225C 8/9

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