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PCA85133U/2DA/Q1 Datasheet(PDF) 32 Page - NXP Semiconductors

Part # PCA85133U/2DA/Q1
Description  Universal LCD driver for low multiplex rates
PDF  44 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA85133U/2DA/Q1 Datasheet(HTML) 32 Page - NXP Semiconductors

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PCA85133_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 1 — 23 October 2009
32 of 44
NXP Semiconductors
PCA85133
Universal LCD driver for low multiplex rates
The contact resistance between the SYNC pins of cascaded devices must be controlled. If
the resistance is too high, then the device will not be able to synchronize properly. This is
particularly applicable to COG applications. Table 19 shows the limiting values for contact
resistance.
Fig 21. Synchronization of the cascade for the various PCA85133 drive modes
Table 19.
SYNC contact resistance
Number of devices
Maximum contact resistance
2
6000
Ω
3 to 5
2200
Ω
6 to 10
1200
Ω
11 to 16
700
Ω
Tfr = f
fr
1
BP0
SYNC
BP0
(1/2 bias)
SYNC
BP0
(1/3 bias)
(a) static drive mode.
(b) 1:2 multiplex drive mode.
(c) 1:3 multiplex drive mode.
(d) 1:4 multiplex drive mode.
BP0
(1/3 bias)
SYNC
SYNC
BP0
(1/3 bias)
mgl755



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