pcf8534ah-1 NXP Semiconductors, pcf8534ah-1 Datasheet - Page 11

• Manufacturer Part Number: pcf8534ah-1
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6.4.4
When four backplanes are provided in the LCD, the 1 : 4 multiplex drive mode applies, as shown in Fig.7.
1999 Jul 30
handbook, full pagewidth
Universal LCD driver for low multiplex rates
V
V
V
V
state1
on(rms)
state2
off(rms)
(t) = V
(t) = V
1 : 4
= 0.638V
= 0.333V
sn
sn
(t)
(t)
MULTIPLEX DRIVE MODE
LCD
LCD
V
V
BP0
BP1
.
.
S n
S n
state 1
state 2
(t).
(t).
BP2
BP0
BP1
S n
1
2
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V SS
V LCD
V LCD /3
V LCD
V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
2V LCD /3
V LCD /3
V LCD /3
2V LCD /3
V LCD
2V LCD /3
V LCD
0 V
0 V
Fig.6 Waveforms for the 1 : 3 multiplex drive mode.
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
T frame
11
state 1
state 2
LCD segments
MGL748
Product specification
PCF8533