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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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PCF8553 Datenblatt(PDF) 21 Page - NXP Semiconductors |
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PCF8553 Datenblatt(HTML) 21 Page - NXP Semiconductors |
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21 / 51 page  NXP Semiconductors PCF8553 40 × 4 LCD segment driver aaa-011870 state 1 COM0 (b) Resultant waveforms at LCD segment. LCD segments state 2 COM1 state 1 state 2 (a) Waveforms at driver. COM2 SEGn SEGn+1 SEGn+2 Tfr VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 0 V VLCD 2VLCD/3 -2V LCD/3 VLCD/3 - VLCD/3 - VLCD 0 V VLCD 2VLCD/3 -2V LCD/3 VLCD/3 - VLCD/3 - VLCD VSS VLCD 2VLCD/3 VLCD/3 Vstate1(t) = VSEGn(t) - VCOM0(t). Von(RMS) = 0.638VLCD. Vstate2(t) = VSEGn(t) - VCOM1(t). Voff(RMS) = 0.333VLCD. Figure 13. Waveforms for the 1:3 multiplex drive mode with 1⁄3 bias 8.2.2.4 1:4 Multiplex drive mode When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies as shown in Figure 14. PCF8553 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved. Product data sheet Rev. 4 — 20 April 2021 21 / 51 |
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