PCF8576T,118 NXP Semiconductors, PCF8576T,118 Datasheet - Page 9

• Manufacturer Part Number: PCF8576T,118
• Description: IC LCD DVR UNVRSL LOW-MUX 56VSO
• Manufacturer: NXP Semiconductors

Specifications of PCF8576T,118

• Display Type: LCD
• Configuration: 40 Segment
• Interface: I²C
• Current - Supply: 180µA
• Voltage - Supply: 2 V ~ 9 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 56-VSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Digits Or Characters: -
• Other names: 933740730118; PCF8576TD-T; PCF8576TD-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.