PCF85162T/1,118 NXP Semiconductors, PCF85162T/1,118 Datasheet - Page 7

IC LCD DISPLAY DVR 32SEG 48TSSOP

PCF85162T/1,118

Manufacturer Part Number
PCF85162T/1,118
Description
IC LCD DISPLAY DVR 32SEG 48TSSOP
Manufacturer
NXP Semiconductors
Datasheet

Specifications of PCF85162T/1,118

Package / Case
48-TSSOP
Display Type
LCD
Configuration
32 Segment
Interface
I²C
Digits Or Characters
Any Digit Type
Current - Supply
8µA
Voltage - Supply
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Number Of Digits
16
Number Of Segments
128
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
Attached Touch Screen
No
Maximum Supply Current
50 mA
Minimum Operating Temperature
- 40 C
Dc
1123
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
568-5059-2
NXP Semiconductors
PCF85162_2
Product data sheet
7.3 LCD voltage selector
The LCD voltage selector coordinates the multiplexing of the LCD in accordance with the
selected LCD drive configuration. The operation of the voltage selector is controlled by the
mode-set command from the command decoder. The biasing configurations that apply to
the preferred modes of operation, together with the biasing characteristics as functions of
V
Table 5.
A practical value for V
threshold voltage (V
the static drive mode a suitable choice is V
Multiplex drive modes of 1:3 and 1:4 with
hence the contrast ratios are smaller.
Bias is calculated by
The RMS on-state voltage (V
where the values for n are
The RMS off-state voltage (V
Discrimination is the ratio of V
V
V
D
LCD drive
mode
static
1:2 multiplex 2
1:2 multiplex 2
1:3 multiplex 3
1:4 multiplex 4
LCD
on RMS
off RMS
a = 1 for
a = 2 for
n = 1 for static drive mode
n = 2 for 1:2 multiplex drive mode
n = 3 for 1:3 multiplex drive mode
n = 4 for 1:4 multiplex drive mode
=
(
(
---------------------- -
V
and the resulting discrimination ratios (D) are given in
V
off RMS
on RMS
)
)
(
(
=
=
Biasing characteristics
1
1
V
2
3
V
LCD
LCD
)
)
Number of:
Backplanes Levels
1
bias
bias
=
All information provided in this document is subject to legal disclaimers.
----------------------------- -
n
----------------------------- -
n
a
a
2
×
×
2
(
------------------------------------------- -
(
th
+
a
a 1
(
(
------------ -
1
), typically when the LCD exhibits approximately 10 % contrast. In
1
1
LCD
2a
+
2a
1
+
+
+
1
Rev. 02 — 7 May 2010
a
+
+
a
)
a
)
is determined by equating V
2
2
)
, where the values for a are
n
)
n
2
3
4
4
4
2
2
+
+
on(RMS)
off(RMS)
(
(
on(RMS)
n 1
n 1
LCD bias
configuration
static
1
1
1
1
)
)
) for the LCD is calculated with
) for the LCD is calculated with
2
3
3
3
to V
off(RMS)
1
Universal LCD driver for low multiplex rates
LCD
2
bias are possible but the discrimination and
> 3V
and is determined from
th
0
0.354
0.333
0.333
0.333
V
------------------------ -
.
off RMS
V
off(RMS)
LCD
(
Table
)
with a defined LCD
1
0.791
0.745
0.638
0.577
V
----------------------- -
on RMS
V
5.
(
LCD
Equation
Equation
PCF85162
)
© NXP B.V. 2010. All rights reserved.
Equation
2.236
2.236
1.915
1.732
D
=
2:
1:
------------------------ -
V
V
off RMS
on RMS
3:
(
(
7 of 43
)
(1)
(2)
(3)
)

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