UNISONIC TECHNOLOGIES CO., LTD U74HC245 CMOS IC OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS DIP-20 DESCRIPTION The U74HC245 is designed for the asynchronous communication between data buses. 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. SOP-20 SSOP-20 FEATURES TSSOP-20 * Operate from 2V to 6V * Max tPD is 18ns at 6V ORDERING INFORMATION Ordering Number Lead Free U74HC245L-D20-T - Halogen Free U74HC245G-D20-T U74HC245G-S20-R U74HC245G-R20-R U74HC245G-P20-R Package Packing DIP-20 SOP-20 SSOP-20 TSSOP-20 Tube Tape Reel Tape Reel Tape Reel MARKING DIP-20 www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd SOP-20 / SSOP-20 / TSSOP-20 1 of 5 QW-R502-639.E U74HC245 CMOS IC PIN CONFIGURATION DIR 1 20 VCC A1 2 19 OE A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A5 6 15 B4 A6 7 14 B5 A7 8 13 B6 A8 9 12 B7 GND 10 11 B8 FUNCTION TABLE INPUT OE DIR FUNCTION X H Isolation L H Transmit data from A bus to B bus L L Transmit data from B bus to A bus Note: H: HIGH voltage level; L: LOW voltage level. LOGIC DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-639.E U74HC245 CMOS IC ABSOLUTE MAXIMUM RATING (TA=25°С, unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7.0 V Input Clamp Current (ViN<0) IIK ±20 mA Output Clamp Current (VOUT<0) IOK ±20 mA Output Current IOUT ±35 mA VCC or GND Current ICC ±70 mA Storage Temperature TSTG -65 ~ +150 °C Note: 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. THERMAL DATA PARAMETER Junction to Ambient θJA RATINGS 52 80 96 103 UNIT °C/W °C/W °C/W °C/W RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Input Voltage Output Voltage Input Transition Rise or Fall Rate Operating Temperature SYMBOL DIP-20 SOP-20 SSOP-20 TSSOP-20 SYMBOL VCC VIN VOUT tR TEST CONDITIONS MIN 2 0 0 VCC =2V VCC =4.5V VCC =6V TOPR -40 TYP MAX UNIT 5 6 V VCC V VCC V 1000 ns 500 ns 400 ns 85 °C ELECTRICAL CHARACTERISTICS (TA=25°С, unless otherwise specified) PARAMETER SYMBOL High-level input voltage VIH Low-lever output voltage VIL High-Level Output Voltage VOH Low-Level Output Voltage VOL Input Current of DIR or OE Output OFF-state current Quiescent Supply Current Input Capacitance of DIR or OE II(LEAK) IOZ IQ CIN TEST CONDITIONS VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V, IOH=-20μA VCC=4.5V, IOH=-20μA VCC=6V, IOH=-20μA VCC=4.5V, IOH=-6mA VCC=6V, IOH=-7.8mA VCC=2V, IOL=20μA VCC=4.5V, IOL=20μA VCC=6V, IOL=20μA VCC=4.5V, IOH=6mA VCC=6V, IOL=7.8mA VCC=6V, VIN=VCC or GND VCC=6V, VOUT=VCC or GND VCC=6V, VIN=VCC or GND, IOUT=0 VCC=6V, VIN=VCC or GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.5 3.15 4.2 TYP MAX UNIT V V V 0.5 V 1.35 V 1.8 V 1.9 1.998 V 4.4 4.499 V 5.9 5.999 V 3.98 4.3 V 5.48 5.8 V 0.002 0.1 V 0.001 0.1 V 0.001 0.1 V 0.17 0.26 V 0.15 0.26 V ±0.1 ±100 nA ±0.01 ±0.5 μA 8 μA 3 10 pF 3 of 5 QW-R502-639.E U74HC245 CMOS IC SWITCHING CHARACTERISTICS (TA=25°С, CL=50pF, RL=1kΩ, unless otherwise specified) PARAMETER SYMBOL Propagation delay from input (A or B) to output (B or A) tPD (tPLH/tPHL) 3-state output enable time from input ( OE ) to output (A or B) tEN (tPZL/tPZH) 3-state output disable time from input ( OE ) to output (A or B) tDIS (tPLZ/tPHZ) Output transition time, (A or B) tT (tR/tF) TEST CONDITIONS VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V VCC=2V VCC=4.5V VCC=6V MIN TYP MAX UNIT 40 105 ns 15 21 ns 12 18 ns 125 230 ns 23 46 ns 20 39 ns 74 200 ns 25 40 ns 21 34 ns 20 60 ns 8 12 ns 6 10 ns TEST CONDITIONS MIN TYP MAX UNIT 40 pF OPERATING CHARACTERISTICS PARAMETER Power Dissipation Capacitance SYMBOL CPD No load UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R502-639.E U74HC245 CMOS IC TEST CIRCUIT AND WAVEFORMS Note： CL includes probe and jig capacitance. PRR ≤1MHz, ZO = 50Ω, tR ≤6ns, tF ≤6ns 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 5 of 5 QW-R502-639.E