PCF8566T NXP Semiconductors, PCF8566T Datasheet - Page 14

• Manufacturer Part Number: PCF8566T
• Manufacturer: NXP Semiconductors

Specifications of PCF8566T

• Operating Supply Voltage (typ): 3.3/5V
• Number Of Digits: 12
• Number Of Segments: 96
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Package Type: VSO
• Pin Count: 40
• Mounting: Surface Mount
• Power Dissipation: 400mW
• Frequency (max): 315KHz
• Operating Supply Voltage (min): 2.5V
• Operating Supply Voltage (max): 6V
• Lead Free Status / Rohs Status: Not Compliant

NXP Semiconductors
PCF8566_7
Product data sheet
7.4.4 1:4 multiplex drive mode
When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies, as
shown in
Fig 9.
Sn+1
Sn+2
Sn+3
state 1
state 2
BP2
BP0
BP1
BP3
Sn
Figure
V
V
V
V
Waveforms for the 1:4 multiplex mode with
state1
on(RMS)
state2
off(RMS)
(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
V
2V
V
V
V
2V
V
V
2V
V
0 V
0 V
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
SS
LCD
LCD
SS
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
9.
= 0.577V
= 0.333V
LCD
LCD
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
/ 3
Sn
Sn
/ 3
/ 3
(t)
(t)
Rev. 07 — 25 February 2009
LCD
LCD.
V
V
BP0
BP1
.
(t).
(t).
(b) Resultant waveforms
(a) Waveforms at driver.
at LCD segment.
Universal LCD driver for low multiplex rates
T
fr
1
3
bias
state 1
state 2
mgl749
PCF8566
© NXP B.V. 2009. All rights reserved.
LCD segments
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