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74HC193PW Datasheet(PDF) 6 Page - NXP Semiconductors |
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74HC193PW Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 29 page 74HC_HCT193_3 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 03 — 23 May 2007 6 of 29 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 L X X X X L L L L H L H X X H X X X X LLLLH H Parallel load L L X L L L L L L L L L H L LLX H L LLLLLLLH H L L L X H HHHHHHHL H L L H X H HHHHHHHHH 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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