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PCF8533 Datasheet(PDF) 11 Page - NXP Semiconductors

Part # PCF8533
Description  Universal LCD driver for low multiplex rates
PDF  36 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8533 Datasheet(HTML) 11 Page - NXP Semiconductors

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1999 Jul 30
11
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex rates
PCF8533
Fig.6 Waveforms for the 1 : 3 multiplex drive mode.
Vstate1(t)=Vsn(t) − VBP0(t).
Von(rms) = 0.638VLCD.
Vstate2(t)=Vsn(t) − VBP1(t).
Voff(rms) = 0.333VLCD.
handbook, full pagewidth
MGL748
state 1
BP0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 1
state 2
(a) Waveforms at driver.
BP2
Sn
Sn + 1
Sn + 2
Tframe
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
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
0 V
VLCD
2VLCD/3
−2VLCD/3
VLCD/3
−VLCD/3
−VLCD
VSS
VLCD
2VLCD/3
VLCD/3
6.4.4
1 : 4 MULTIPLEX DRIVE MODE
When four backplanes are provided in the LCD, the 1 : 4 multiplex drive mode applies, as shown in Fig.7.



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