PCF85134HL-1 NXP [NXP Semiconductors], PCF85134HL-1 Datasheet - Page 33

• Manufacturer Part Number: PCF85134HL-1
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCF85134_1
Product data sheet
The contact resistance between the SYNC pins of cascaded devices must be controlled. If
the resistance is too high, the device will not be able to synchronize properly.
Table 19
Table 19.
Number of devices
2
3 to 5
6 to 10
11 to 16
Fig 21. Synchronization of the cascade for various PCF85134 drive modes
shows the maximum contact resistance values.
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. 01 — 17 December 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
=
Maximum contact resistance
6000
2200
1200
700
f
1
fr
PCF85134
mgl755
© NXP B.V. 2009. All rights reserved.
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