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CD74HC137 Datasheet(PDF) 6 Page - Texas Instruments |
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CD74HC137 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 20 page 6 LE Pulse Width tW 2 50- -65-75 - ns 4.5 10 - - 13 - 15 - ns 6 9 - - 1 - 13 - ns HCT TYPES An to LE Setup Time tSU 4.5 10 - - 13 - 15 - ns An to LE Hold Time tH CD74HCT137 4.5 7 - - 9 - 11 - ns CD74HCT237 tH 4.5 5- -5-5- ns LE Pulse Width tW 4.5 10 - - 13 - 15 - ns 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 CD74HC137, CD74HCT137 tPLH, tPHL CL = 50pF 2 - - 180 - 225 - 270 ns An to any Y 4.5 - - 36 - 45 - 54 ns 6 - - 31 - 38 - 46 ns Propagation Delay ’HC237, CD74HCT237 tPLH, tPHL CL = 50pF 2 - - 160 - 200 - 240 ns An to any Y 4.5 - - 32 - 40 - 48 ns 6 - - 27 - 34 - 41 ns Address to Output CD74HC137 tPLH, tPHL CL = 15pF 5 5 15 - - - - - ns ’HC237 tPLH, tPHL CL = 15pF 5 - 13 - - - - - ns OE0 to any Y or Y tPLH, tPHL CL = 50pF 2 - - 145 - 180 - 220 ns 4.5 - - 29 - 36 - 44 ns 6 - - 25 - 31 - 38 ns OE1 to any Y or Y tTLH, tTHL CL = 50pF 2 - - 145 - 180 - 220 ns 4.5 - - 29 - 36 - 44 ns 6 - - 25 - 31 - 38 ns LE to any Y or Y tTLH, tTHL CL = 50pF 2 - - 190 - 240 - 285 ns 4.5 - - 38 - 48 - 57 ns 6 - - 32 - 41 - 48 ns Power Dissipation Capacitance, (Notes 3, 4) CD74HC137 CPD CL = 15pF 5 - 19 - - - - - pF ’HC237 CPD CL = 15pF 5 - 23 - - - - - pF Output Transition Time tTLH, tTHL CL = 50pF 2 - - 75 - 95 - 110 ns 4.5 - - 15 - 19 - 22 ns 6 - - 13 - 16 - 19 ns Input Capacitance CI - - - - 10 - 10 - 10 pF Prerequisite For Switching Specifications (Continued) PARAMETER SYMBOL VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX CD74HC137, CD74HCT137, CD54HC237, CD74HC237, CD74HCT237 |
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