UNISONIC TECHNOLOGIES CO., LTD U74LVC244 CMOS IC OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS DESCRIPTION The UTC U74LVC244 contains two 4-bit line drivers with separate output-enable ( OE ) inputs. When OE is low, the device passes data from the A to the Y. When OE is high, the outputs are in the high-impedance state. The UTC U74LVC244 can be used in a mixed 3.3V/5V system environment. FEATURES * Operate From 1.65V to 3.6V * Input Accept Voltages to 5.5V * Partial-Power-Down Mode Operation * Max tpd is 5.9ns at 3.3V ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74LVC244L-S20-R U74LVC244G-S20-R U74LVC244L-P20-R U74LVC244G-P20-R www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing SOP-20 TSSOP-20 Tape Reel Tape Reel 1 of 6 QW-R502-245.C U74LVC244 PIN CONFIGURATION 1OE 1 20 VCC 1A1 2 19 2OE 2Y4 3 18 1Y1 1A2 4 17 2A4 2Y3 5 16 1Y2 1A3 6 15 2A3 2Y2 7 14 1Y3 1A4 8 13 2A2 2Y1 9 12 1Y4 GND 10 11 2A1 FUNCTION TABLE (each gate) INPUT(OE ) H L L CMOS IC INPUT(A) X H L OUTPUT(Y) Z H L LOGIC DIAGRAM (Positive Logic) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-245.C U74LVC244 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~6.5 V Input Voltage VIN -0.5~ 6.5 V Voltage applied to output in high-impedance or power-off state -0.5~6.5 VOUT V -0.5~VCC+0.5 Voltage applied to output in high or low state Input Clamp Current IIK -50 mA Output Clamp Current IOK -50 mA Output Current IOUT ±50 mA VCC or GND Current ICC ±100 mA SOP-20 500 Power dissipation mW TSSOP-20 450 PD SOP-20 7 mW/K Derate above Ta>60°C 6.1 TSSOP-20 Operating Temperature TOPR -40~ +125 °C Storage Temperature -65 ~ +150 °C TSTG Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. RECOMMENDED OPERATING CONDITIONS PARAMETER SYMBOL Supply Voltage VCC Input Voltage Output Voltage VIN VOUT High-Level Input Voltage VIH CONDITIONS Operating Data retention only VCC=1.65V to 1.95V VCC=2.3V to 2.7V VCC=2.7V to 3.6V VCC=1.65V to 1.95V Low-Level Input Voltage High-Level Output Current Low-Level Output Current VIL IOH IOL TYP MAX 3.6 UNIT V V V V V V 5.5 VCC 2 V 0.35×VCC V VCC=2.3V to 2.7V 0.7 V VCC=2.7V to 3.6V VCC=1.65V 0.8 -4 mA VCC=2.3V -8 mA VCC=2.7V -12 mA VCC=3V VCC=1.65V VCC=2.3V VCC=2.7V VCC=3V -24 mA mA mA mA mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.65 1.5 0 0 0.65×VCC 1.7 4 8 12 24 V 3 of 6 QW-R502-245.C U74LVC244 CMOS IC ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL High-Level Output Voltage VOH Low-Level Output Voltage VOL Input Leakage Current Power OFF Leakage Current Output OFF-State Current II(LEAK) IOFF IOZ Quiescent Supply Current IQ Additional Quiescent Supply Current Input Capacitance Output Capacitance ΔIQ CI CO MIN TYP VCC-0.2 1.29 1.9 2.2 2.4 2.3 MAX V 0.1 0.24 0.3 0.4 0.55 ±1 ±1 ±1 1 1 VCC=2.7V to 3.6V, One input at VCC-0.6V,Other inputs at VCC or GND VCC=3.3V, VIN=VCC or GND VCC=3.3V, VOUT=VCC or GND UNIT 500 4 5.5 V uA uA uA uA uA pF pF SWITCHING CHARACTERISTICS PARAMETER SYMBOL From Input(A) to Output(Y) tpd From Input(OE ) to Output(Y) ten From Input(OE ) to Output(Y) tdis TEST CONDITIONS VCC=1.65V to 3.6V, IOH=-100uA VCC=1.65V, IOH=-4mA VCC=2.3V, IOH=-8mA VCC=2.7V, IOH=-12mA VCC=3V, IOH=-12mA VCC=3V, IOH=-24mA VCC=1.65V to 3.6V, IOH=100uA VCC= 1.65V, IOH=4mA VCC=2.3V, IOH=8mA VCC=2.7V, IOH=12mA VCC=3V, IOH=24mA VCC=3.6V, VIN=5.5 V or GND VCC=0V, VIN or VOUT=5.5V VCC=3.6V, VOUT=0 or GND VCC=3.6V ,VIN=VCC or GND, IOUT=0 VCC=3.6V ,3.6V≦VIN≦5.5V, IOUT=0 TEST CONDITIONS VCC=1.5V VCC=1.8V±0.15V VCC=2.5V±0.2V VCC=2.7V VCC=3.3V±0.3V VCC=1.5V VCC=1.8V±0.15V VCC=2.5V±0.2V VCC=2.7V VCC=3.3V±0.3V VCC=1.5V VCC=1.8V±0.15 V VCC=2.5V±0.2V VCC=2.7V VCC=3.3V±0.3V MIN 1 1 1 1 1.5 1 1 1 1 1.5 1 1 1 1 1.5 TYP 7 5.9 4.2 4.2 3.9 8.3 6.4 4.6 5 4.5 7.2 5.8 3.7 3.8 3.8 MAX 14.4 10.4 7.4 6.7 5.7 17.8 12.1 9.1 8.4 7.4 15.6 11.6 7.3 6.6 6.3 UNIT MIN TYP 43 43 44 1 1 2 MAX UNIT ns ns ns OPERATING CHARACTERISTICS PARAMETER SYMBOL Power Dissipation Capacitance Cpd TEST CONDITIONS OE=0, f=10MHz, VCC=1.8V OE=0, f=10MHz, VCC=2.5V OE=0, f=10MHz, VCC=3.3V OE=1, f=10MHz, VCC=1.8V OE=1, f=10MHz, VCC=2.5V OE=1, f=10MHz, VCC=3.3V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw pF 4 of 6 QW-R502-245.C U74LVC244 CMOS IC TEST CIRCUIT AND WAVEFORMS tPLH/tPHL VEXT tPZH/tPHZ tPZL/tPLZ 2KΩ OPEN GND 2*VCC 30pF 1KΩ OPEN GND 2*VCC 0.15V 30pF 500Ω OPEN GND 2*VCC 1.5V 0.3V 50pF 500Ω OPEN GND 6V 1.5V 0.3V 50pF 500Ω OPEN GND 6V VCC VIN tR/tF VM V△ CL RL 1.5V VCC ≤2ns VCC/2 0.1V 15pF 1.8V±0.15V VCC ≤2ns VCC/2 0.15V 2.5V±0.2V VCC ≤2ns VCC/2 2.7V 2.7V ≤2.5ns 3.3V±0.3V 2.7V ≤2.5ns Fig-1 Load circuitry Fig-2 Propagation delay waves UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-245.C U74LVC244 CMOS IC UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R502-245.C