PCA85133 NXP [NXP Semiconductors], PCA85133 Datasheet - Page 32

• Manufacturer Part Number: PCA85133
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA85133_1
Product data sheet
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.
resistance.
Table 19.
Number of devices
2
3 to 5
6 to 10
11 to 16
Fig 21. Synchronization of the cascade for the various PCA85133 drive modes
SYNC contact resistance
(1/2 bias)
(1/3 bias)
(1/3 bias)
(1/3 bias)
BP0
SYNC
SYNC
SYNC
SYNC
BP0
BP0
BP0
BP0
Rev. 1 — 23 October 2009
(b) 1:2 multiplex drive mode.
(c) 1:3 multiplex drive mode.
(d) 1:4 multiplex drive mode.
(a) static drive mode.
T
Universal LCD driver for low multiplex rates
fr
Table 19
=
Maximum contact resistance
6000
2200
1200
700
f
1
fr
shows the limiting values for contact
PCA85133
mgl755
© NXP B.V. 2009. All rights reserved.
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