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74HCT238BQ Datasheet(PDF) 4 Page - NXP Semiconductors |
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74HCT238BQ Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 18 page 74HC_HCT238_3 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 03 — 16 July 2007 4 of 18 NXP Semiconductors 74HC238; 74HCT238 3-to-8 line decoder/demultiplexer 5.2 Pin description 6. Functional description [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care. Table 2. Pin description Symbol Pin Description A[0:2] 1, 2, 3 address input E1 4 enable input (active LOW) E2 5 enable input (active LOW) E3 6 enable input (active HIGH) Y[0:7] 15, 14, 13, 12, 11, 10, 9, 7 output (active HIGH) GND 8 ground (0 V) VCC 16 supply voltage Table 3. Function table[1] Inputs Outputs E1 E2 E3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 H X X X X X L LLLLLLL X H X X X X L LLLLLLL X X LX X X LLLLLLLL LLH L LLH L LLLLLL LLH H L LLH LLLLLL LLH L H LLLH LLLLL LLH H H LLLLH LLLL LLH L LH LLLLH LLL LLH H L H L LLLLH LL LLH L H H LLLLLLH L LLH H H H L LLLLLLH |
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