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U74HCT21 Dataheets PDF



Part Number U74HCT21
Manufacturers Unisonic Technologies
Logo Unisonic Technologies
Description DUAL 4-INPUT AND GATES
Datasheet U74HCT21 DatasheetU74HCT21 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD U74HCT21 DUAL 4-INPUT AND GATES „ DESCRIPTION The U74HCT21 contains two independent 4-input AND gates. They perform the Boolean function Y=A • B • C • D or Y=A + B + C + D in positive logic. „ FEATURES * Operation Voltage Range: 4.5V~5.5V * Low Quiescent Current: ICC=2μA(Max) * High Speed: tPD=15ns @ 4.5V (Typ) * Low Input Current: 100nA Max * Inputs are TTL Voltage Compatiabel CMOS IC „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free U7.

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UNISONIC TECHNOLOGIES CO., LTD U74HCT21 DUAL 4-INPUT AND GATES „ DESCRIPTION The U74HCT21 contains two independent 4-input AND gates. They perform the Boolean function Y=A • B • C • D or Y=A + B + C + D in positive logic. „ FEATURES * Operation Voltage Range: 4.5V~5.5V * Low Quiescent Current: ICC=2μA(Max) * High Speed: tPD=15ns @ 4.5V (Typ) * Low Input Current: 100nA Max * Inputs are TTL Voltage Compatiabel CMOS IC „ ORDERING INFORMATION Ordering Number Lead Free Halogen Free U74HCT21L-P14-T U74HCT21G-P14-T U74HCT21L-P14-R U74HCT21G-P14-R Package TSSOP-14 TSSOP-14 Packing Tube Tape Reel www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 4 QW-R502-656.A U74HCT21 „ PIN CONFIGURATION 1A 1B NC 1C 1D 1Y GND 1 2 3 4 5 6 7 14 VCC 13 2D 12 2C 11 NC 10 2B 9 2A 8 2Y „ FUNCTION TABLE INPUT(A) H L X X X INPUT(B) H X L X X „ LOGIC DIAGRAM (positive logic) INPUT(C) H X X L X INPUT(D) H X X X L CMOS IC OUTPUT(Y) H L L L L UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 4 QW-R502-656.A U74HCT21 CMOS IC „ ABSOLUTE MAXIMUM RATING (unless otherwise specified) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC -0.5 ~ 7 Input Clamp Current IIK -20 Output Clamp Current IOK ±20 Output Current IOUT ±25 VCC or GND Current ICC ±50 Storage Temperature TSTG -65 ~ +150 Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. V mA mA mA mA ℃ Absolute maximum ratings are stress ratings only and functional device operation is not implied. „ RECOMMENDED OPERATING CONDITIONS PARAMETER Supply Voltage Input Voltage Output Voltage Input Transition Rise or Fall Rate Operating Temperature SYMBOL VCC VIN VOUT tR, tF TA CONDITIONS VCC=4.5V MIN TYP MAX UNIT 4.5 5.5 V 0 Vcc V 0 VCC V 500 ns -40 85 ℃ „ STATIC CHARACTERISTICS (TA = 25°С) PARAMETER High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage Low-Level Output Voltage Input Leakage Current Quiescent Supply Current Additional Quiescent Supply Current Input Capacitance SYMBOL TEST CONDITIONS VIH VCC= 4.5V to 5.5V VIL VCC= 4.5V to 5.5V VOH VCC= 4.5V, IO = -20µA VCC= 4.5V, IO = -4mA VOL VCC= 4.5V, IO = 20µA VCC= 4.5V, IO = 4mA II(LEAK) VCC= 5.5V ,VIN = VCC or GND ICC VCC= 5.5V, VIN = VCC or GND, IO = 0 △ICC One input at VCC -2.1V, other inputs at 0 or VCC CIN VCC=4.5V~5.5V MIN 2.0 4.4 3.98 TYP 4.999 4.3 0.001 0.17 ±0.1 MAX 0.8 0.1 0.26 ±100 2 UNIT V V V V nA µA 100 360 uA 3 10 pF „ DYNAMIC CHARACTERISTICS (TA=25°С, Input: tR=tF=6ns, unless otherwise specified ) PARAMETER Propagation delay from Input(A or B) to Output(Y) Output Transition Time SYMBOL TEST CONDITIONS tPLH, tPHL VCC=4.5V, CL=50pF tT VCC=4.5V, CL=50pF MIN TYP MAX UNIT 15 27 ns 7 15 ns „ OPERATING CHARACTERISTICS (TA=25°С, unless otherwise specified) PARAMETER SYMBOL TEST CONDITION Power Dissipation Capacitance CPD No Load RATINGS 42 UNIT pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 4 QW-R502-656.A U74HCT21 „ TEST CIRCUIT AND WAVEFORMS CL (Note) Output Note : CL includes probe and jig capacitance. 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 4 of 4 QW-R502-656.A .


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