pcf8576d NXP Semiconductors, pcf8576d Datasheet - Page 11

• Manufacturer Part Number: pcf8576d
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 2 Discrimination ratios
6.4
6.4.1
The static LCD drive mode is used when a single backplane is provided in the LCD. The backplane (BPn) and segment
drive (S
2004 Dec 22
handbook, full pagewidth
static
1 : 2 multiplex
1 : 2 multiplex
1 : 3 multiplex
1 : 4 multiplex
Universal LCD driver for low
multiplex rates
LCD DRIVE MODE
V
V
V
on(rms)
state2
off(rms)
LCD drive mode waveforms
n
t ( )
) waveforms for this mode are shown in Fig.4.
S
=
=
TATIC DRIVE MODE
=
V
0 V
V
LCD
S
n
+
1
t ( ) V
–
BP0
t ( )
1
2
2
3
4
BACKPLANES
S n
state 1
state 2
NUMBER OF
BP0
S n
1
V LCD
V LCD
V LCD
V LCD
V LCD
V LCD
V LCD
Fig.6 Static drive mode waveforms.
V SS
V SS
V SS
0 V
0 V
2
3
4
4
4
LEVELS
(b) Resultant waveforms
(a) Waveforms at driver.
at LCD segment.
T frame
static
1
1
1
1
11
CONFIGURATION
2
3
3
3
LCD BIAS
state 1
(on)
LCD segments
MGL745
state 2
(off)
0
0.354
0.333
0.333
0.333
V
-------------------- -
off(rms)
V
lcd
1
0.791
0.745
0.638
0.577
V
-------------------- -
on(rms)
V
lcd
Product specification
PCF8576D
D
2.236
2.236
1.915
1.732
=
V
-------------------- -
V
on(rms)
off(rms)