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74HC137 Datenblatt(PDF) 5 Page - NXP Semiconductors |
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74HC137 Datenblatt(HTML) 5 Page - NXP Semiconductors |
5 / 8 page 9397 750 13804 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Product data sheet Rev. 03 — 11 November 2004 5 of 19 Philips Semiconductors 74HC137 3-to-8 line decoder, demultiplexer with address latches; inverting 6.2 Pin description 7. Functional description 7.1 Function table [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care. Table 3: Pin description Symbol Pin Description A0 1 data input 0 A1 2 data input 1 A2 3 data input 2 LE 4 latch enable input (active LOW) E1 5 data enable input 1 (active LOW) E2 6 data enable input 2 (active HIGH) Y7 7 multiplexer output 7 GND 8 ground (0 V) Y6 9 multiplexer output 6 Y5 10 multiplexer output 5 Y4 11 multiplexer output 4 Y3 12 multiplexer output 3 Y2 13 multiplexer output 2 Y1 14 multiplexer output 1 Y0 15 multiplexer output 0 VCC 16 positive supply voltage Table 4: Function table [1] Enable Input Output LE E1 E2 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 H L H X X X stable X H X X X X HHHHHHHH X X L X X X HHHHHHHH L L H L L L L HHHHHHH H L L H L HHHHHH L H L HHL HHHHH H H L HHHL HHHH L L H HHHHL HHH H L H HHHHHL HH L H H HHHHHHL H H H H HHHHHHHL |
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