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CD74HCT137 Datasheet(PDF) 3 Page - Texas Instruments |
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CD74HCT137 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 10 page 3 Functional Diagram CD74HC137, CD74HCT137 TRUTH TABLE INPUTS OUTPUTS LE OE0 OE1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X H X X X HHHHHHHH X L X X X X HHHHHHHH L H LLLLL H H H H H H H LHL L LH HLH H H H H H LHL L HLH HLH H H H H L H L L HHHHH L HHHH LHLHL LH H H HLH H H LHLHLH H H H H HLH H LHLH HLH H H H H H LH LHLH H H H H H H H H HL H H L X X X Depends upon the address previously applied while LE was at a logic low. NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care CD74HC237, CD74HCT237 TRUTH TABLE INPUTS OUTPUTS LE OE0 OE1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X H X X X LLLLLLLL X L X X X X LLLLLLLL L H LLLL H L LLLLLL LHL L LHLHL L L L L L L H LL H L LL H L LLLL L H LL H H LLL H LLLL LHLHL L L L L LHL L L LHLHLHL L L L LHL L LHLH HL L L L L L LHL L H L H H H LLLLLLL H H H L X X X Depends upon the address previously applied while LE was at a logic low. NOTE: H = High Voltage Level, L = Low Voltage Level, X = Don’t Care 15 14 13 12 10 7 9 11 1 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 3 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 237 137 6 2 4 5 A0 A1 A2 LE OE1 OE0 3-BIT LATCH 1 OF 8 DECODER GND = 8 VCC = 16 HC/HCT HC/HCT CD74HC137, CD74HCT137, CD74HC237, CD74HCT237 |
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