DESCRIPTION
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 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 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.
Unisonic Technologies
