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PCF8576CU/2 数据表(PDF) 37 Page - NXP Semiconductors

部件名 PCF8576CU/2
功能描述  Universal LCD driver for low multiplex rates
PDF  56 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8576CU/2 数据表(HTML) 37 Page - NXP Semiconductors

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PCF8576C_9
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 09 — 9 July 2009
37 of 56
NXP Semiconductors
PCF8576C
Universal LCD driver for low multiplex rates
Excessive capacitive coupling between SCL or CLK and SYNC will cause erroneous
synchronization. If this is a problem you can increase the capacitance of the SYNC line (e.g. by an
external capacitor between SYNC and VDD.) Degradation of the positive edge of the SYNC pulse
can be countered by an external pull-up resistor.
Fig 30. Synchronization of the cascade for the various PCF8576C drive modes
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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