PCF8576TD NXP Semiconductors, PCF8576TD Datasheet - Page 17

• Manufacturer Part Number: PCF8576TD
• Description: LCD Drivers LCD DVR UNVRSL LOW-MUX
• Manufacturer: NXP Semiconductors

Specifications of PCF8576TD

• Number Of Digits: 20
• Number Of Segments: 160
• Maximum Clock Frequency: 288 KHz
• Operating Supply Voltage: 2 V to 9 V
• Maximum Power Dissipation: 400 mW
• Package / Case: VSO-56
• Maximum Supply Current: 180 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCF8576T,112

Philips Semiconductors
6.16
The display blinking capabilities of the PCF8576 are very
versatile. The whole display can be blinked at frequencies
selected by the BLINK command. The blinking frequencies
are integer multiples of the clock frequency; the ratios
between the clock and blinking frequencies depend on the
mode in which the device is operating, as shown in
Table 3.
An additional feature is for an arbitrary selection of LCD
segments to be blinked. This applies to the static and
1 : 2 LCD drive modes and can be implemented without
any communication overheads. By means of the output
Table 3 Blinking frequencies
2001 Oct 02
Universal LCD driver for low multiplex rates
BLINKING MODE
Blinker
0.5 Hz
2 Hz
1 Hz
Off
NORMAL OPERATING
MODE RATIO
------------------- -
184320
------------------- -
368640
--------------- -
92160
f
f
f
clk
clk
clk
17
bank selector, the displayed RAM banks are exchanged
with alternate RAM banks at the blinking frequency. This
mode can also be specified by the BLINK command.
In the 1 : 3 and 1 : 4 multiplex modes, where no alternate
RAM bank is available, groups of LCD segments can be
blinked by selectively changing the display RAM data at
fixed time intervals.
If the entire display is to be blinked at a frequency other
than the nominal blinking frequency, this can be effectively
performed by resetting and setting the display enable bit E
at the required rate using the MODE SET command.
POWER-SAVING MODE
RATIO
--------------- -
15360
--------------- -
30720
--------------- -
61440
f
f
f
clk
clk
clk
NOMINAL BLINKING
FREQUENCY
Product specification
blinking off
0.5 Hz
2 Hz
1 Hz
PCF8576