UNISONIC TECHNOLOGIES CO., LTD U74LVC245 CMOS IC OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS DESCRIPTION The U74LVC245 is designed for the communication between data buses asynchronously. While the direction-control(DIR) is high, data transmits from the A bus to the B bus. Data transmits from the B bus to the A bus if DIR is low. The output-enable( OE ) will isolate the device from the buses when high voltage is applied on it. FEATURES * Operate From 1.65V to 3.6V * Input Accept Voltages to 5.5V * Partial-Power-Down Mode Operation ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74LVC245L-D20-T U74LVC245G-D20-T U74LVC245L-P20-R U74LVC245G-P20-R U74LVC245L-P20-T U74LVC245G-P20-T U74LVC245L-S20-R U74LVC245G-S20-R U74LVC245L-S20-T U74LVC245G-S20-T www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd Package Packing DIP-20 TSSOP-20 TSSOP-20 SOP-20 SOP-20 Tube Tape Reel Tube Tape Reel Tube 1 of 6 QW-R502-176.Ba U74LVC245 CMOS IC PIN CONFIGURATION DIR A1 A2 A3 A4 A5 A6 A7 A8 GND 1 20 19 18 17 2 3 4 5 6 7 8 9 10 16 15 14 13 12 11 OE B1 B2 B3 B4 B5 B6 B7 B8 FUNCTION TABLE (each gate) INPUT V CC OE DIR H L L × H L FUNCTION Isolation Transmit data from A bus to B bus Transmit data from B bus to A bus LOGIC DIAGRAM (positive logic) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-176.Ba U74LVC245 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 Voltage Applied to Output In High or Low State -0.5~Vcc+0.5 Input Clamp Current IIK -50 mA Output Clamp Current IOK -50 mA Output Current IOUT ±50 mA Vcc or GND Current ICC ±100 mA Storage Temperature TSTG -65 ~ +150 ℃ 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 High-Level VIH Input Voltage Low-Level VIL Input Voltage Output Voltage TEST CONDITIONS Operating Data retention only VCC = 1.65 V to 1.95 V VCC = 2.3 V to 2.7 V VCC = 2.7 V to 3.6 V VCC = 1.65 V to 1.95 V VCC = 2.3 V to 2.7 V VCC = 2.7 V to 3.6 V VIN VOUT MIN 1.65 1.5 TYP MAX 3.6 UNIT V 0.65*Vcc V 1.7 2 0.35*Vcc 0 0 0.7 0.8 5.5 Vcc V MAX UNIT V V ELECTRICAL CHARACTERISTICS PARAMETER Output Voltage High-Level Output Voltage Low-Level Input Leakage Current Power OFF Leakage Current Input Leakage Current (For I/O Ports) Quiescent Supply Current Additional Quiescent Supply Current Input Capacitance SYMBOL VOH VOL II(LEAK) IOFF 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, IOL= 100uA VCC=1.65V, IOL= 4mA VCC=2.3V, IOL= 8mA VCC=2.7V, IOL= 12mA VCC=3V, IOL= 24mA VCC=3.6V, VIN= 5.5 V or GND VCC =0V, VIN or VCC=5.5V V 0.1 0.24 0.3 0.4 0.55 ±1 ±1 uA uA V IOZ VCC=3.6V, VOUT= 0~5.5V ±1 uA IQ VCC=3.6V,VIN =VCC or GND IOUT= 0 VCC=3.6V, 3.6V≦VIN≦5.5V, IOUT=0 1 1 uA 500 uA Δ IQ CIN 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 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP Vcc-0.2 1.29 1.9 2.2 2.4 2.3 4 pF 3 of 6 QW-R502-176.Ba U74LVC245 SWITCHING CHARACTERISTICS PARAMETER From A to Y or From B to A From OE From OE A to A or B CMOS IC to A or B SYMBOL tPLH/tPHL tPZL/tPZH tPLZ/tPHZ TEST CONDITIONS VCC=1.8V ± 0.15V VCC=2.5V ± 0.2V VCC=2.7V VCC=3.3V ± 0.3V VCC=1.8V ± 0.15V VCC=2.5V ± 0.2V VCC=2.7V VCC=3.3V ± 0.3V VCC=1.8V ± 0.15V VCC=2.5V ± 0.2V VCC=2.7V VCC=3.3V ± 0.3V MIN 1 1 1 1.5 1 1 1 1.5 1 1 1 1.7 TYP 6 3.9 4.2 3.8 7 4.5 5.4 4.4 7.8 4 4.4 4.1 MAX 12.2 7.8 7.1 6.1 14.8 10 9.3 8.3 16.5 9 8.3 7.3 UNIT ns ns ns ns ns ns ns ns ns ns ns ns MIN TYP MAX UNIT OPERATING CHARACTERISTICS PARAMETER Power Dissipation Capacitance SYMBOL 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 42 pF 43 pF 45 pF 1 pF 1 pF 2 pF 4 of 6 QW-R502-176.Ba U74LVC245 CMOS IC TEST CIRCUIT AND WAVEFORMS VCC VIN tR/tF VM V△ CL RL 1.8V ±0.15V 2.5V ±0.2V 2.7 V 3.3V ±0.3V VCC VCC 2.7 V 2.7 V ≤2ns ≤2ns ≤2.5ns ≤2.5ns VCC/2 VCC/2 1.5V 1.5V 0.15V 0.15V 0.3V 0.3V 30 PF 30 PF 50 PF 50 PF 1 KΩ 500Ω 500Ω 500Ω tPLH/tPHL OPEN OPEN OPEN OPEN VEXT tPZH/tPHZ GND GND GND GND tPZL/tPLZ 2*VCC 2*VCC 6V 6V Fig-1 Load circuitry Fig-2 Propagation delay waves UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-176.Ba U74LVC245 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-R502-176.Ba