PCF8576DT NXP Semiconductors, PCF8576DT Datasheet - Page 10

• Manufacturer Part Number: PCF8576DT
• Manufacturer: NXP Semiconductors

Specifications of PCF8576DT

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: TSSOP
• Pin Count: 56
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 400KHz
• Operating Supply Voltage (min): 1.8V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Supplier Unconfirmed

NXP Semiconductors
PCF8576D_9
Product data sheet
D
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
2
2
•
•
=
bias is
bias is
1:3 multiplex (
1:4 multiplex (
----------------------- -
V
V
Equation
off RMS
on RMS
----------
3
3
21
=
=
=
3, the discrimination for an LCD drive mode of 1:3 multiplex with
1.732
1.528
1
1
2
2
------------------------------------------- -
a
a 1
V
bias):
bias):
Rev. 09 — 25 August 2009
+
–
LCD
and the discrimination for an LCD drive mode of 1:4 multiplex with
.
1
LCD
2
2
V
V
=
+
+
LCD
is sometimes referred as the LCD operating voltage.
LCD
3V
n 1
n 1
–
–
off RMS
=
=
--------------------- -
6 V
4
3
when
Universal LCD driver for low multiplex rates
off RMS
3
=
1
3
2.309V
bias is used.
=
2.449V
off RMS
off RMS
PCF8576D
© NXP B.V. 2009. All rights reserved.
10 of 52
LCD
(3)