74LCX244

74LCX244 LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS s s s s s s s s s s 5V TOLERANT INPUTS AND OUTPUTS HIGH SPEED : tPD = 6.5 ns (MAX.) at VCC = 3V POWER DOWN PROTECTION ON INPUTS AND OUTPUTS SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24mA (MIN) at VCC = 3V PCI BUS LEVELS GUARANTEED AT 24 mA BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL OPERATING VOLTAGE RANGE: VCC(OPR) = 2.0V to 3.6V (1.5V Data Retention) PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 244 LATCH-UP PERFORMANCE EXCEEDS 500mA (JESD 17) ESD PERFORMANCE: HBM > 2000V (MIL STD 883 method 3015); MM > 200V SOP TSSOP ORDER CODES PACKAGE SOP TSSOP TUBE 74LCX244M T&R 74LCX244MTR 74LCX244TTR DESCRIPTION The 74LCX244 is a low voltage CMOS OCTAL BUS BUFFER (NON-INVERTED) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for both inputs and outputs. It has same speed performance at 3.3V than 5V AC/ACT family, combined with a lower power consumption. This device is designed to be used with 3 state memory address drivers, etc. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS March 2002 1/9 7 4LCX244 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION PIN No 1 2, 4, 6, 8 9, 7, 5, 3 11, 13, 15, 17 18, 16, 14, 12 19 10 20 SYMBOL 1G 1A1 to 1A4 2Y1 to 2Y4 2A1 to 2A4 1Y1 to 1Y4 2G GND V CC NAME AND FUNCTION Output Enable Input Data Inputs Data Outputs Data Inputs Data Outputs Output Enable Input Ground (0V) Positive Supply Voltage TRUTH TABLE INPUT G L L H X : Don’t Care Z : High Impedance OUTPUT An L H X Yn L H Z ABSOLUTE MAXIMUM RATINGS Symbol V CC VI VO VO IIK IOK IO ICC IGND Tstg TL Supply Voltage DC Input Voltage DC Output Voltage (OFF State) DC Output Voltage (High or Low State) (note 1) DC Input Diode Current DC Output Diode Current (note 2) DC Output Current DC Supply Current per Supply Pin DC Ground Current per Supply Pin Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7.0 -0.5 to +7.0 -0.5 to +7.0 -0.5 to VCC + 0.5 - 50 - 50 ± 50 ± 100 ± 100 -65 to +150 300 Unit V V V V mA mA mA mA mA °C °C Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied 1) IO absolute maximum rating must be observed 2) VO < GND 2/9 74LCX244 RECOMMENDED OPERATING CONDITIONS Symbol V CC VI VO VO IOH, IOL IOH, IOL Top dt/dv Supply Voltage (note 1) Input Voltage Output Voltage (OFF State) Output Voltage (High or Low State) High or Low Level Output Current (V CC = 3.0 to 3.6V) High or Low Level Output Current (V CC = 2.7V) Operating Temperature Input Rise and Fall Time (note 2) Parameter Value 2.0 to 3.6 0 to 5.5 0 to 5.5 0 to VCC ± 24 ± 12 -55 to 125 0 to 10 Unit V V V V mA mA °C ns/V 1) Truth Table guaranteed: 1.5V to 3.6V 2) VIN from 0.8V to 2V at VCC = 3.0V DC SPECIFICATIONS Test Condition Symbol Parameter VCC (V) -40 to 85 °C Min. 2.0 2.7 to 3.6 0.8 2.7 to 3.6 2.7 3.0 VOL Low Level Output Voltage 2.7 to 3.6 2.7 3.0 II Ioff IOZ Input Leakage Current Power Off Leakage Current High Impedance Output Leakage Current Quiescent Supply Current ICC incr. per Input 2.7 to 3.6 0 2.7 to 3.6 I O=-100 µA IO=-12 mA IO=-18 mA IO=-24 mA IO=100 µA IO=12 mA IO=16 mA IO=24 mA VI = 0 to 5.5V V I or VO = 5.5V V I = VIH or VIL VO = 0 to VCC VI = VCC or GND VCC-0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 ±5 10 ±5 10 ± 10 500 VCC-0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 ±5 10 ±5 10 ± 10 500 µA µA µA µA µA V V 0.8 V Max. Value -55 to 125 ° C Min. 2.0 Max. V Unit VIH VIL VOH High Level Input Voltage Low Level Input Voltage High Level Output Voltage ICC ∆ICC 2.7 to 3.6 VI or VO= 3.6 to 5.5V VIH = VCC - 0.6V 2.7 to 3.6 3/9 7 4LCX244 DYNAMIC SWITCHING CHARACTERISTICS Test Condition Symbol Parameter VCC (V) 3.3 CL = 50pF VIL = 0V, V IH = 3.3V Value TA = 25 °C Min. Typ. 0.8 -0.8 Max. V Unit VOLP V OLV Dynamic Low Level Quiet Output (note 1) 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 Conditi on Symbol Parameter VCC (V) 2.7 3.0 to 3.6 2.7 3.0 to 3.6 2.7 3.0 to 3.6 3.0 to 3.6 CL (pF) 50 50 50 50 RL (Ω) 500 500 500 500 ts = t r (ns) 2.5 2.5 2.5 2.5 -40 to 85 °C Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 7.5 6.5 9.0 8.0 8.0 7.0 1.0 Value -55 to 125 °C Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 8.2 7.1 10.5 9.2 9.2 7.7 1.0 ns ns ns ns Unit tPLH tPHL tPZL tPZH tPLZ tPHZ tOSLH tOSHL Propagation Delay Time Output Enable Time Output Disable Time Output To Output Skew Time (note1, 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 switching in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|) 2) Parameter guaranteed by design CAPACITIVE CHARACTERISTICS Test Condition Symbol Parameter VCC (V) 3.3 3.3 3.3 VIN = 0 to VCC VIN = 0 to VCC fIN = 10MHz V IN = 0 or VCC Value TA = 25 °C Min. Typ. 6 10 34 Max. pF pF pF Unit CIN C OUT CPD Input Capacitance Output Capacitance Power Dissipation Capacitance (note 1) 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit) 4/9 74LCX244 TEST CIRCUIT TEST tPLH, tPHL tPZL, tPLZ tPZH, tPHZ C L = 50 pF or equivalent (includes jig and probe capacitance) R L = R1 = 500 Ω or equivalent R T = ZOUT of pulse generator (typically 50Ω) SWITCH Open 6V GND WAVEFORM 1 : PROPAGATION DELAYS (f=1MHz; 50% duty cycle) 5/9 7 4LCX244 WAVEFORM 2 : OUTPUT ENABLE AND DISABLE TIME (f=1MHz; 50% duty cycle) 6/9 74LCX244 SO-20 MECHANICAL DATA mm. DIM. MIN. A a1 a2 b b1 C c1 D E e e3 F L M S 7.40 0.50 12.60 10.00 1.27 11.43 7.60 1.27 0.75 8° (max.) 0.291 0.020 13.00 10.65 0.35 0.23 0.5 45° (typ.) 0.496 0.393 0.050 0.450 0.300 0.050 0.029 0.512 0.419 0.1 TYP MAX. 2.65 0.2 2.45 0.49 0.32 0.014 0.009 0.020 0.004 MIN. TYP. MAX. 0.104 0.008 0.096 0.019 0.012 inch PO13L 7/9 7 4LCX244 TSSOP20 MECHANICAL DATA mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0° 0.45 0.60 0.05 0.8 0.19 0.09 6.4 6.2 4.3 6.5 6.4 4.4 0.65 BSC 8° 0.75 0° 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 6.6 6.6 4.48 0.002 0.031 0.007 0.004 0.252 0.244 0.169 0.256 0.252 0.173 0.0256 BSC 8° 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.260 0.260 0.176 inch A A2 A1 b e K c L E D E1 PIN 1 IDENTIFICATION 1 0087225C 8/9 74LCX244 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringe ment of patents or other righ ts of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this pub lication are subject to change without notice. Thi s pub lication supersedes and replaces all information previously supplied. STMicroelectronics prod ucts are not authori zed for use as critical components in life suppo rt devices or systems without express written approval of STMicroelectronics. © The ST logo is a registered trademark of STMicroelectronics © 2000 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Swit zerland - United Kingdom © http://w ww.st.com 9/9