PCF8576DT/S400/2,1 NXP Semiconductors, PCF8576DT/S400/2,1 Datasheet - Page 13
PCF8576DT/S400/2,1
Manufacturer Part Number
PCF8576DT/S400/2,1
Description
LCD Drivers 2.64KHz 50mA 400mW
Manufacturer
NXP Semiconductors
Datasheet
1.PCF8576DTS40021.pdf
(56 pages)
Specifications of PCF8576DT/S400/2,1
Rohs
yes
Maximum Clock Frequency
2.64 kHz
Operating Supply Voltage
1.8 V to 5.5 V
Package / Case
TSSOP-56
Maximum Power Dissipation
400 mW
Maximum Supply Current
50 mA
Mounting Style
SMD/SMT
Factory Pack Quantity
2000
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NXP Semiconductors
PCF8576D
Product data sheet
7.4.2 1:2 Multiplex drive mode
The 1:2 multiplex drive mode is used when two backplanes are provided in the LCD. This
mode allows fractional LCD bias voltages of
Figure
Fig 8.
(1) V
(2) V
(3) V
(4) V
9.
Waveforms for the 1:2 multiplex drive mode with
state1
on(RMS)
state2
off(RMS)
Sn+1
state 1
state 2
(t) = V
(t) = V
BP0
BP1
S n
All information provided in this document is subject to legal disclaimers.
= 0.354V
= 0.791V
Sn
Sn+1
(t) − V
V
V
V
V
V
V
V
V
V
V
V
V
−V
−V
V
V
−V
−V
0 V
0 V
(t) − V
LCD
LCD
SS
LCD
LCD
SS
LCD
SS
LCD
SS
LCD
LCD
LCD
LCD
Rev. 13 — 10 May 2012
LCD
LCD
LCD
LCD
LCD
LCD
/ 2
/ 2
/ 2
/ 2
BP0
.
.
/ 2
/ 2
BP1
(t).
(t).
(a) Waveforms at driver.
(b) Resultant waveforms
Universal LCD driver for low multiplex rates
at LCD segment.
1
⁄
2
bias or
T
fr
1
⁄
3
1
bias as shown in
⁄
2
bias
state 1
state 2
mgl746
LCD segments
PCF8576D
© NXP B.V. 2012. All rights reserved.
Figure 8
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