PCF8579 Philips Semiconductors, PCF8579 Datasheet - Page 11

• Manufacturer Part Number: PCF8579
• Description: LCD column driver for dot matrix graphic displays
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1997 Apr 01
LCD column driver for dot matrix graphic
displays
V state 1 (t)
V state 2 (t)
ROW 1
R1 (t)
ROW 2
R2 (t)
COL 1
C1 (t)
COL 2
C2 (t)
V
V
0.2 V op
0 V
0.2 V op
0.6 V op
0.2 V op
0 V
0.2 V op
0.6 V op
V
V
V op
V op
V op
V op
V DD
V 2
V
V
V
V
V DD
V 2
V
V
V
V
V DD
V 2
V
V
V
V
V DD
V 2
V
V
V
V
on(rms)
off(rms)
state 1
state 2
V
V
3
4
5
LCD
3
4
5
LCD
3
4
5
LCD
3
4
5
LCD
op
op
(t) = C1(t)
(t) = C2(t)
=
=
Fig.7 LCD drive mode waveforms for 1 : 16 multiplex rate.sa.
16
1
2 (
16
16
(
16 1
R1(t):
R2(t):
16 1
(
16 1
16 1
)
)
2
= 0.254
)
= 0.316
T frame
11
V
V
general relationship (n = multiplex rate)
on(rms)
off(rms)
V
V
op
op
=
=
1
n
2 (
n
(
n
n 1
(
n 1
n
n 1
)
1
)
2
)
MSA836
dot matrix
1:16 multiplex rate
Product specification
state 1 (OFF)
state 2 (ON)
PCF8579