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| PCF8576 Datasheet, PDF (12/40 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates | |||
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Philips Semiconductors
Universal LCD driver for low multiplex
rates
Product speciï¬cation
PCF8576
BP0
BP1
BP2/S23
Sn
Sn 1
Sn 2
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
VDD
VDD Vop /3
VDD 2Vop /3
VLCD
state 1
state 2
Vop
2V op /3
Vop /3
0
Vop /3
2V op /3
Vop
Vop
2V op /3
Vop /3
0
Vop /3
2V op /3
Vop
Vstate1(t) = VSn(t) â VBP0(t)
Von(rms) = 0.638Vop
Vstate2(t) = VSn(t) â VBP1(t)
Voff(rms) = 0.333Vop
T frame
LCD segments
state 1
state 2
(a) waveforms at driver
(b) resultant waveforms
at LCD segment
MBE542
Fig.7 Waveforms for the 1 : 3 multiplex drive mode (Vop = VDD â VLCD).
1998 Feb 06
12
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