UNISONIC TECHNOLOGIES CO., LTD U74HC540 CMOS IC OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS DESCRIPTION The U74HC540 combines with octal buffers and line drivers with inverting 3-tate outputs. The 3-state output is controlled by output enable inputs OE1 and OE 2 , all eight outputs will be in high-impedance when either of the 2 inputs is applied with high voltage. TSSOP-20 FEATURES * Operation voltage range: 2V ~ 6V * High-current 3-state outputs for bus driver * Inverting outputs ORDERING INFORMATION Ordering Number U74HC540G-P20-R ■ Package TSSOP-20 Packing Tape Reel MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 5 QW-R126-004.B U74HC540 CMOS IC PIN CONFIGURATION FUNCTION TABLE (each gate) INPUT OUTPUT OE1 OE 2 A L L H X L L X H L H X X Y H L Z Z LOGIC DIAGRAM (positive logic) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R126-004.B U74HC540 CMOS IC ABSOLUTE MAXIMUM RATINGS (unless otherwise specified)(Note 1) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5~7 V Input Clamp Current IIK ±20 mA Output Clamp Current IOK ±20 mA Output Current IOUT ±35 mA VCC or GND Current ICC ±70 mA Storage Temperature TSTG -65 ~ +150 °C 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 Supply Voltage Input Voltage Output Voltage SYMBOL VCC VIN VOUT Input Transition Rise or Fall Rate Operating Temperature tR, tF CONDITIONS MIN 2 0 0 0 0 0 -40 VCC=2V VCC=4.5V VCC=6V TA TYP 5 MAX 6 VCC VCC 1000 500 400 85 UNIT V V V ns °C ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL High-Level Input Voltage VIH Low-Level Input Voltage VIL High-Level Output Voltage Low-Level Output Voltage Input Leakage Current Output Leakage Current VOH VOL II(LEAK) IO(LEAK) Quiescent Supply Current IQ Input Capacitance 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, IOH=20μA VCC=4.5V, IOH=20μA VCC=6V, IOH=20μA VCC=4.5V, IOL =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=2V~6V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 1.9 4.4 5.9 3.98 5.48 TA =25°C TYP MAX 1.998 4.499 5.999 4.3 5.8 0.002 0.001 0.001 0.17 0.15 ±0.1 ±0.01 3 0.1 0.1 0.1 0.26 0.26 ±100 ±0.5 -40~85°C UNIT MIN MAX 1.5 V 3.15 4.2 0.5 V 1.35 1.8 1.9 4.4 V 5.9 3.84 5.34 0.1 0.1 V 0.1 0.33 0.33 ±1000 nA ±5 uA 8 80 μA 10 10 pF 3 of 5 QW-R126-004.B U74HC540 SWITCHING CHARACTERISTICS (tR, tF≤3ns) PARAMETER Propagation delay from input (A) to output(Y) 3-state output enable time from CMOS IC OE to Yn 3-state output disable time SYMBOL tPLH/ tPHL tPZH/ tPZL tPHZ/ tPLZ TEST CONDITIONS VCC=2V, CL=50 pF VCC=2V, CL=150 pF VCC=4.5V, CL=50 pF VCC=4.5V, CL=150 pF VCC=6V, CL=50 pF VCC=6V, CL=150 pF VCC=2V, CL=50 pF VCC=2V, CL=150 pF VCC=4.5V, CL=50 pF VCC=4.5V, CL=150 pF VCC=6V, CL=50 pF VCC=6V, CL=150 pF VCC=2V, CL=50 pF VCC=4.5V, CL=50 pF VCC=6V, CL=50 pF from OE to Yn OPERATING CHARACTERISTICS PARAMETER Power Dissipation Capacitance SYMBOL TEST CONDITIONS Cpd No load, f=1MHz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TA=25°C TYP 35 60 10 15 8 13 75 100 15 20 13 17 40 18 17 MAX 100 150 20 30 17 26 150 200 30 40 26 34 150 30 26 MIN -40~85°C UNIT MIN MAX 125 188 25 ns 38 21 32 188 250 38 ns 50 32 43 188 ns 38 32 TYP 35 MAX UNIT pF 4 of 5 QW-R126-004.B U74HC540 CMOS IC TEST CIRCUIT AND WAVEFORMS Note: CL includes probe and jig capacitance. 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-R126-004.B