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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCF8534AHL/1 датащи(PDF) 10 Page - NXP Semiconductors |
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PCF8534AHL/1 датащи(HTML) 10 Page - NXP Semiconductors |
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10 / 47 page  PCF8534A_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 6 August 2009 10 of 47 NXP Semiconductors PCF8534A Universal LCD driver for low multiplex rates Using Equation 3, the discrimination for an LCD drive mode of 1:3 multiplex with 1 ⁄2 bias is and the discrimination for an LCD drive mode of 1:4 multiplex with 1 ⁄2 bias is . The advantage of these LCD drive modes is a reduction of the LCD full scale voltage VLCD as follows: • 1:3 multiplex (1 ⁄2 bias): • 1:4 multiplex (1 ⁄ 2 bias): These compare with when 1 ⁄ 3 bias is used. It should be noted that VLCD is sometimes referred as the LCD operating voltage. 3 1.732 = 21 3 ---------- 1.528 = V LCD 6V off RMS () × 2.449V off RMS () == V LCD 43 × () 3 ---------------------- 2.309V off RMS () == V LCD 3V off RMS () = |
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