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PCF8576CU/5 Datasheet(PDF) 14 Page - NXP Semiconductors

Part # PCF8576CU/5
Description  Universal LCD driver for low multiplex rates
PDF  44 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF8576CU/5 Datasheet(HTML) 14 Page - NXP Semiconductors

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1998 Jul 30
14
Philips Semiconductors
Product specification
Universal LCD driver for low multiplex
rates
PCF8576C
6.4.4
1 : 4 MULTIPLEX DRIVE MODE
When four backplanes are provided in the LCD, the 1 : 4 multiplex drive mode applies, as shown in Fig.9.
MBE543
2V
/3
op
Vop
state 1
0
BP0
(b) resultant waveforms
at LCD segment
LCD segments
state 2
Tframe
BP1
Vop
state 1
V
/3
op
2V
/3
op
V
/3
op
2V
/3
op
Vop
state 2
0
Vop
V
/3
op
2V
/3
op
V
/3
op
Sn 1
BP2
S n 2
Sn 3
(a) waveforms at driver
Sn
BP3
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
VDD
V
V
/3
DD
op
VLCD
V
2V
/3
DD
op
Fig.9 Waveforms for the 1 : 4 multiplex drive mode (Vop =VDD − VLCD).
V
state1 t
()
V
S
n
t
()
V
BP0 t
()
–
=
V
on(rms)
0.577V
op
=
V
state2 t
()
V
S
n
t
()
V
BP1 t
()
–
=
V
off(rms)
0.333V
op
=



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