PCF8576DT/S400/2,1 NXP Semiconductors, PCF8576DT/S400/2,1 Datasheet - Page 10

• Manufacturer Part Number: PCF8576DT/S400/2,1
• Description: LCD Drivers 2.64KHz 50mA 400mW
• Manufacturer: NXP Semiconductors

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

NXP Semiconductors
PCF8576D
Product data sheet
7.3.1 Electro-optical performance
Using
1
1
The advantage of these LCD drive modes is a reduction of the LCD full scale voltage V
as follows:
These compare with
It should be noted that V
Suitable values for V
RMS voltage, at which a pixel will be switched on or off, determine the transmissibility of
the pixel.
For any given liquid, there are two threshold values defined. One point is at 10 % relative
transmission (at V
Figure
V
of a, n (see
V
manufacturer. V
voltage V
It is important to match the module properties to those of the driver in order to achieve
optimum performance.
D
V
V
⁄
⁄
2
2
on(RMS)
th(off)
•
•
on RMS
off RMS
bias is
bias is
=
(
(
1:3 multiplex (
1:4 multiplex (
---------------------- -
V
V
Equation
and V
off RMS
6. For a good contrast performance, the following rules should be followed:
on RMS
)
)
and V
(
≥
(
≤
sat
----------
V
V
3
3
.
21
Equation 1
th on
th(on)
th off
)
)
(
=
(
off(RMS)
=
=
All information provided in this document is subject to legal disclaimers.
3, the discrimination for an LCD drive mode of 1:3 multiplex with
th(off)
1.732
)
)
are properties of the LCD liquid and can be provided by the module
1.528
1
1
th(off)
⁄
⁄
a
-------------------------- -
a
2
2
2
2
on(RMS)
is sometimes just named V
bias):
bias):
V
+
–
are properties of the display driver and are affected by the selection
) and the other at 90 % relative transmission (at V
LCD
and the discrimination for an LCD drive mode of 1:4 multiplex with
to
Rev. 13 — 10 May 2012
2a
2a
.
LCD
Equation
+
+
V
V
=
and V
n
is sometimes referred as the LCD operating voltage.
n
LCD
LCD
3V
off RMS
=
=
off(RMS)
(
3) and the V
(
--------------------- -
6
4
×
)
×
3
are dependent on the LCD liquid used. The
V
when
Universal LCD driver for low multiplex rates
off RMS
3
)
(
1
=
LCD
th
⁄
3
. V
)
2.309V
bias is used.
=
voltage.
th(on)
2.449V
is sometimes named saturation
off RMS
(
off RMS
(
)
PCF8576D
)
© NXP B.V. 2012. All rights reserved.
th(on)
), see
10 of 56
LCD
(3)
(4)
(5)