PCF8576DT/2,118 NXP Semiconductors, PCF8576DT/2,118 Datasheet - Page 9
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PCF8576DT/2,118
Manufacturer Part Number
PCF8576DT/2,118
Description
IC LCD DRIVER 40/160SEG 56TSSOP
Manufacturer
NXP Semiconductors
Datasheet
1.PCF8576DT2118.pdf
(50 pages)
Specifications of PCF8576DT/2,118
Package / Case
56-TSSOP
Display Type
LCD
Configuration
40 Segment
Interface
I²C
Current - Supply
24µA
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Number Of Digits
20
Number Of Segments
160
Maximum Clock Frequency
400 KHz
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Power Dissipation
400 mW
Maximum Operating Temperature
+ 85 C
Maximum Supply Current
50 mA
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
568-4703 - DEMO BOARD LCD GRAPHIC DRIVER
Digits Or Characters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-3558-2
935276166118
PCF8576DT/2-T
935276166118
PCF8576DT/2-T
NXP Semiconductors
PCF8576D
Product data sheet
7.3.1 Electro-optical performance
where the values for n are
The RMS off-state voltage (V
Discrimination is the ratio of V
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
For a good contrast performance, the following rules should be followed:
V
of a, n (see
V
D
V
V
⁄
⁄
2
2
on(RMS)
•
•
off RMS
on RMS
off RMS
n = 1 for static mode
n = 2 for 1:2 multiplex
n = 3 for 1:3 multiplex
n = 4 for 1:4 multiplex
bias is
bias is
=
(
(
(
1:3 multiplex (
1:4 multiplex (
---------------------- -
V
V
Equation
off RMS
on RMS
)
)
)
and V
(
≥
(
≤
=
----------
V
V
3
3
21
Equation 1
V
high
low
LCD
)
)
=
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
1.732
----------------------------- -
n
1.528
a
1
1
low
×
2
⁄
⁄
(
------------------------------------------- -
(
2
2
a
a 1
–
) and the other at 90 % relative transmission (at V
on(RMS)
(
bias):
bias):
V
Rev. 10 — 14 February 2011
1
+
are properties of the display driver and are affected by the selection
2a
–
LCD
and the discrimination for an LCD drive mode of 1:4 multiplex with
to
+
.
1
LCD
+
)
a
)
Equation
2
2
)
n
V
V
=
2
+
+
and V
is sometimes referred as the LCD operating voltage.
LCD
LCD
off(RMS)
(
(
on(RMS)
3V
n 1
n 1
–
–
off RMS
=
=
off(RMS)
)
(
)
3) and the V
) for the LCD is calculated with
to V
(
--------------------- -
6
4
×
)
×
3
off(RMS)
V
are dependant on the LCD liquid used. The
when
Universal LCD driver for low multiplex rates
off RMS
3
)
(
1
=
LCD
⁄
and is determined from
3
)
2.309V
bias is used.
=
voltage.
2.449V
off RMS
(
off RMS
(
)
PCF8576D
Equation
)
high
© NXP B.V. 2011. All rights reserved.
Equation
), see
2:
Figure
3:
9 of 50
LCD
(2)
(3)
(4)
(5)
5.