PCF8576CT NXP Semiconductors, PCF8576CT Datasheet - Page 15

• Manufacturer Part Number: PCF8576CT
• Manufacturer: NXP Semiconductors

Specifications of PCF8576CT

• Operating Supply Voltage (typ): 2.5/3.3/5V
• Number Of Digits: 20
• Number Of Segments: 160
• Package Type: VSO
• Pin Count: 56
• 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
7.4.3 1:3 Multiplex drive mode
When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies as
shown in
Fig 10. Waveforms for the 1:3 multiplex drive mode with
S n+1
S n+2
state 1
state 2
Figure
V
V
V
V
BP2
BP0
BP1
state1
on(RMS)
state2
off(RMS)
S n
(t) = V
(t) = V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
V
2V
V
V
2V
V
10.
0 V
0 V
= 0.638V
= 0.333V
V
2V
V
V
2V
V
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Sn
Sn
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
(t)
(t)
/ 3
/ 3
LCD
LCD.
Rev. 09 — 9 July 2009
V
V
BP0
BP1
.
(t).
(t).
(a) Waveforms at driver.
(b) Resultant waveforms
at LCD segment.
Universal LCD driver for low multiplex rates
T
fr
1
3
bias
state 1
state 2
PCF8576C
LCD segments
mgl748
© NXP B.V. 2009. All rights reserved.
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