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PCF8533 Datasheet(PDF) 9 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) 9 Page - NXP Semiconductors

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1999 Jul 30
9
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex rates
PCF8533
6.4.2
1 : 2 MULTIPLEX DRIVE MODE
When two backplanes are provided in the LCD, the 1 : 2 multiplex mode applies. The PCF8533 allows the use of 1
⁄2bias
or 1
⁄3bias in this mode as shown in Figs 4 and 5.
Fig.4 Waveforms for the 1 : 2 multiplex drive mode with 1
⁄2bias.
Vstate1(t)=Vsn(t) − VBP0(t).
Von(rms) = 0.791VLCD.
Vstate2(t)=Vsn(t) − VBP1(t).
Voff(rms) = 0.354VLCD.
handbook, full pagewidth
MGL746
state 1
BP0
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
BP1
state 2
state 1
VSS
VLCD
VLCD/2
VSS
VSS
VLCD
VLCD
VSS
VLCD
VLCD
VLCD
0 V
0 V
VLCD/2
VLCD/2
VLCD/2
−VLCD
−VLCD
−VLCD/2
−VLCD/2
Sn
Sn + 1
Tframe



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