PCF8576TD-T NXP Semiconductors, PCF8576TD-T Datasheet - Page 9

• Manufacturer Part Number: PCF8576TD-T
• Description: LCD Drivers 160 SEGMENT LCD SEGMENT DRIVER
• Manufacturer: NXP Semiconductors

Specifications of PCF8576TD-T

• Number Of Digits: 20
• Number Of Segments: 160
• Maximum Clock Frequency: 288 KHz
• Operating Supply Voltage: 2 V to 9 V
• Maximum Power Dissipation: 400 mW
• Package / Case: VSO-56
• Maximum Supply Current: 180 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCF8576T,118

Philips Semiconductors
6.4
The static LCD drive mode is used when a single
backplane is provided in the LCD. Backplane and segment
drive waveforms for this mode are shown in Fig.4.
When two backplanes are provided in the LCD, the 1 : 2
multiplex mode applies. The PCF8576 allows use of
1
2001 Oct 02
2
bias or
Universal LCD driver for low multiplex rates
V
V
V
V
off(rms)
state1
on(rms)
state2
LCD drive mode waveforms
t ( )
t ( )
1
=
=
=
=
3
0 V
V
bias in this mode as shown in Figs 5 and 6.
V
V
op
S
S
n
n
t ( ) V
+
1
t ( ) V
–
–
BP0
BP0
t ( )
t ( )
Fig.4 Static drive mode waveforms (V
state 1
state 2
S n 1
BP0
S n
V LCD
V LCD
V LCD
V op
V DD
V DD
V DD
V op
V op
V op
0
0
(b) resultant waveforms
(a) waveforms at driver
at LCD segment
9
T frame
When three backplanes are provided in the LCD, the 1 : 3
multiplex drive mode applies, as shown in Fig.7.
When four backplanes are provided in the LCD, the 1 : 4
multiplex drive mode applies, as shown in Fig.8.
op
state 1
(on)
LCD segments
= V
MBE539
DD
V
state 2
(off)
LCD
).
Product specification
PCF8576