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74HC4040N 데이터시트(PDF) 5 Page - NXP Semiconductors |
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5 / 24 page 74HC_HCT4040_3 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 03 — 14 September 2005 5 of 24 Philips Semiconductors 74HC4040; 74HCT4040 12-stage binary ripple counter 7.2 Pin description 8. Functional description 8.1 Function table [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; ↑ = LOW-to-HIGH clock transition; ↓ = HIGH-to-LOW clock transition. Table 3: Pin description Symbol Pin Description Q11 1 output 11 Q5 2 output 5 Q4 3 output 4 Q6 4 output 6 Q3 5 output 3 Q2 6 output 2 Q1 7 output 1 GND 8 ground (0 V) Q0 9 output 0 CP 10 clock input (HIGH-to-LOW, edge-triggered) MR 11 master reset input (active HIGH) Q8 12 output 8 Q7 13 output 7 Q9 14 output 9 Q10 15 output 10 VCC 16 positive supply voltage Table 4: Function table Input Output CP MR Q0 to Q11 ↑ L no change ↓ L count XH L |
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