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74HCT193DB Arkusz danych(PDF) 7 Page - NXP Semiconductors |
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74HCT193DB Arkusz danych(HTML) 7 Page - NXP Semiconductors |
7 / 29 page 74HC_HCT193_3 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 03 — 23 May 2007 7 of 29 NXP Semiconductors 74HC193; 74HCT193 Presettable synchronous 4-bit binary up/down counter (1) Clear overrides load, data and count inputs. (2) When counting up, the count down clock input (CPD) must be HIGH, when counting down the count up clock input (CPU) must be HIGH. Sequence Clear (reset outputs to zero); load (preset) to binary thirteen; count up to fourteen, fifteen, terminal count up, zero, one and two; count down to one, zero, terminal count down, fifteen, fourteen and thirteen. Fig 8. Typical clear, load and count sequence 001aag411 COUNT UP COUNT DOWN 013 CLEAR PRESET 1 0 15 14 13 14 15 0 1 2 MR(1) PL D0 D1 D2 D3 CPU(2) CPD(2) Q0 Q1 Q2 Q3 TCU TCD |
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