pca8576d NXP Semiconductors, pca8576d Datasheet - Page 12

• Manufacturer Part Number: pca8576d
• Description: Automotive 40 X 4 Lcd Segment Driver For Low Multiplex Rates Up To 1 4
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA8576D
Product data sheet
7.4.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies
(see
Fig 8.
Figure
(1) V
(2) V
(3) V
(4) V
state 1
state 2
S n+1
S n+2
BP2
BP0
BP1
Waveforms for the 1:3 multiplex drive mode with
S n
state1
on(RMS)
state2
off(RMS)
8).
(t) = V
(t) = V
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V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
−V
−2V
−V
V
2V
V
−V
−2V
−V
0 V
0 V
= 0.333V
= 0.638V
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Sn
Sn+1
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
(t)  V
/ 3
/ 3
(t)  V
Automotive 40 x 4 LCD segment driver for low multiplex rates
LCD
LCD
Rev. 1 — 4 April 2011
BP0
.
.
BP1
(t).
(t).
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
T
fr
1

3
bias
state 1
state 2
PCA8576D
LCD segments
mgl748
© NXP B.V. 2011. All rights reserved.
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