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74HCT393N 데이터시트(PDF) 4 Page - NXP Semiconductors |
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4 / 21 page 74HC_HCT393 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 4 — 16 May 2013 4 of 21 NXP Semiconductors 74HC393; 74HCT393 Dual 4-bit binary ripple counter 5.2 Pin description (1) This is not a supply pin. The substrate is attached to this pad using conductive die attach material. There is no electrical or mechanical requirement to solder this pad. However, if it is soldered, the solder land should remain floating or be connected to VCC. Fig 7. Pin configuration SSOP14 and TSSOP14 Fig 8. Pin configuration DHVQFN14 Table 2. Pin description Symbol Pin Description 1CP 1 clock input (HIGH-to-LOW, edge-triggered) 1MR 2 asynchronous master reset input (active HIGH) 1Q0 3 flip-flop output 1Q1 4 flip-flop output 1Q2 5 flip-flop output 1Q3 6 flip-flop output GND 7 ground (0 V) 2Q3 8 flip-flop output 2Q2 9 flip-flop output 2Q1 10 flip-flop output 2Q0 11 flip-flop output 2MR 12 asynchronous master reset input (active HIGH) 2CP 13 clock input (HIGH-to-LOW, edge-triggered) VCC 14 supply voltage |
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