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74HCT193PW 데이터시트(PDF) 6 Page - NXP Semiconductors |
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74HCT193PW 데이터시트(HTML) 6 Page - NXP Semiconductors |
6 / 30 page 74HC_HCT193 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved. Product data sheet Rev. 4 — 24 June 2013 6 of 30 NXP Semiconductors 74HC193; 74HCT193 Presettable synchronous 4-bit binary up/down counter 6. Functional description [1] H = HIGH voltage level L = LOW voltage level X = don’t care = LOW-to-HIGH clock transition. [2] TCU = CPU at terminal count up (HHHH) [3] TCD = CPD at terminal count down (LLLL). Table 3. Function table[1] Operating mode Inputs Outputs MR PL CPU CPD D0 D1 D2 D3 Q0 Q1 Q2 Q3 TCU TCD Reset (clear) H X X LX X X X LLLLH L H X X H X X X X LLLLH H Parallel load LLX LLL LLLLLLH L LLX H LL LLLLLLH H LLLX H H HHHHHHL H L L HX HH HHHHHHHH Count up L H H X X X X count up H[2] H Count down L H H X X X X count down H H[3] |
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