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PCF8579 Datasheet(PDF) 9 Page - NXP Semiconductors

Part # PCF8579
Description  LCD column driver for dot matrix graphic displays
PDF  41 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8579 Datasheet(HTML) 9 Page - NXP Semiconductors

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PCF8579_5
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 11 May 2009
9 of 41
NXP Semiconductors
PCF8579
LCD column driver for dot matrix graphic displays
Figure 5 shows the values of Table 4 as graphs.
Table 5.
Discrimination ratios
Discrimination
ratios
Multiplex rate
1:8
1:16
1:24
1:32
0.297
0.245
0.214
0.193
0.430
0.316
0.263
0.230
1.447
1.291
1.230
1.196
3.370
4.080
4.680
5.190
Vbias =V2, V3, V4, V5; see Table 4.
Fig 5.
Vbias/Voper as a function of the multiplex rate
V
off RMS
()
V
oper
-------------------------
V
on RMS
()
V
oper
-----------------------
D
V
on RMS
()
V
off RMS
()
-------------------------
=
V
oper
V
th
--------------
1:8
1:16
1:32
1.0
0
0.8
msa838
1:24
0.6
0.4
0.2
multiplex rate
Vbias
Voper
V2/Voper
V3/Voper
V4/Voper
V5/Voper



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