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CD74HC221PWT Datasheet(PDF) 6 Page - Texas Instruments |
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CD74HC221PWT Datasheet(HTML) 6 Page - Texas Instruments |
6 / 21 page 6 Input Pulse Width Reset tWL 2 70- -90- 105 - ns 4.5 14 - - 18 - 21 - ns 6 12- -15-18 - ns Recovery Time R to A or B tSU 2 0 - - 0-0- ns 4.5 0- -0-0- ns 6 0 - - 0-0- ns Output Pulse Width Q or Q CX = 0.1µF RX = 10kΩ tW 5 630 - 770 602 798 595 805 µs Output Pulse Width Q or Q CX = 28pF, RX = 2kΩ tW 4.5 - 140 ----- ns CX = 1000pF, RX = 2kΩ tW 4.5 - 1.5 ----- µs CX = 1000pF, RX = 10kΩ tW 4.5 - 7 ----- µs HCT TYPES Input Pulse Width A tWL 4.5 14 - - 18 - 21 - ns Input Pulse Width B tWH 4.5 14 - - 18 - 21 - ns Input Pulse Width Reset tWL 4.5 18 - - 23 - 27 - ns Recovery Time R to A or B tSU 4.5 0- -0-0- ns Output Pulse Width Q or Q CX = 0.1µF RX = 10kΩ tW 5 630 - 770 602 798 595 805 µs Output Pulse Width Q or Q CX = 28pF, RX = 2kΩ tW 4.5 - 140 ----- ns CX = 1000pF, RX = 2kΩ tW 4.5 - 1.5 ----- µs CX = 1000pF, RX = 10kΩ tW 4.5 - 7 ----- µs Switching Specifications Input tr, tf = 6ns PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX HC TYPES Propagation Delay, Trigger A, B, R to Q tPLH CL = 50pF 2 - - 210 - 265 - 315 ns CL = 50pF 4.5 - - 42 - 53 - 63 ns CL = 50pF 6 - - 36 - 45 - 54 ns CL = 15pF 5 - 18 - - - - - ns Propagation Delay, Trigger A, B, R to Q tPHL CL = 50pF 2 - - 170 - 215 - 255 ns CL = 50pF 4.5 - - 34 - 43 - 51 ns CL = 50pF 6 - - 29 - 37 - 43 ns CL = 15pF 5 - 14 - - - - - ns Prerequisite For Switching Function (Continued) PARAMETER SYMBOL VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX CD54HC221, CD74HC221, CD74HCT221 |
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