PCF8576CH NXP Semiconductors, PCF8576CH Datasheet - Page 13

• Manufacturer Part Number: PCF8576CH
• Manufacturer: NXP Semiconductors

Specifications of PCF8576CH

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: LQFP
• Pin Count: 64
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 315KHz
• Operating Supply Voltage (min): 2V
• Operating Supply Voltage (max): 6V
• Lead Free Status / Rohs Status: Compliant

NXP Semiconductors
PCF8576C_9
Product data sheet
7.4.2 1:2 Multiplex drive mode
When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The
PCF8576C allows the use of
Fig 8.
V
V
V
V
Waveforms for the 1:2 multiplex drive mode with
state1
on(RMS)
state2
off(RMS)
Sn+1
state 1
state 2
(t) = V
(t) = V
BP0
BP1
S n
= 0.791V
= 0.354V
Sn
Sn
(t)
(t)
V
V
V
V
V
V
V
V
V
V
V
V
V
V
0 V
0 V
V
V
V
V
LCD
LCD
SS
LCD
LCD
SS
LCD
SS
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Rev. 09 — 9 July 2009
V
V
BP0
BP1
/ 2
/ 2
/ 2
/ 2
.
/ 2
/ 2
(t).
(t).
1
2
bias or
1
(a) Waveforms at driver.
(b) Resultant waveforms
3
bias (see
Universal LCD driver for low multiplex rates
at LCD segment.
T
fr
Figure 8
1
2
bias
and
state 1
state 2
mgl746
LCD segments
Figure
PCF8576C
© NXP B.V. 2009. All rights reserved.
9).
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