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PCF8553DTT/A 数据表(PDF) 21 Page - NXP Semiconductors

部件名 PCF8553DTT/A
功能描述  40 횞 4 LCD segment driver
PDF  51 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

PCF8553DTT/A 数据表(HTML) 21 Page - NXP Semiconductors

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NXP Semiconductors
PCF8553
40 × 4 LCD segment driver
aaa-011870
state 1
COM0
(b) Resultant waveforms
at LCD segment.
LCD segments
state 2
COM1
state 1
state 2
(a) Waveforms at driver.
COM2
SEGn
SEGn+1
SEGn+2
Tfr
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
VSS
VLCD
2VLCD/3
VLCD/3
0 V
VLCD
2VLCD/3
-2V LCD/3
VLCD/3
- VLCD/3
- VLCD
0 V
VLCD
2VLCD/3
-2V LCD/3
VLCD/3
- VLCD/3
- VLCD
VSS
VLCD
2VLCD/3
VLCD/3
Vstate1(t) = VSEGn(t) - VCOM0(t).
Von(RMS) = 0.638VLCD.
Vstate2(t) = VSEGn(t) - VCOM1(t).
Voff(RMS) = 0.333VLCD.
Figure 13. Waveforms for the 1:3 multiplex drive mode with 1⁄3 bias
8.2.2.4 1:4 Multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies as
shown in Figure 14.
PCF8553
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 4 — 20 April 2021
21 / 51



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