PCF8576C View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8576C' PDF : 57 Pages View PDF
NXP Semiconductors
PCF8576C
Universal LCD driver for low multiplex rates
Using Equation 3, the discrimination for an LCD drive mode of 1:3 multiplex with
1⁄2 bias is 3 = 1.732 and the discrimination for an LCD drive mode of 1:4 multiplex with
1⁄2 bias is
-----2---1--
3
=
1.528 .
The advantage of these LCD drive modes is a reduction of the LCD full scale voltage VLCD
as follows:
• 1:3 multiplex (1⁄2 bias): VLCD = 6 × Voff(RMS) = 2.449Voff(RMS)
• 1:4 multiplex (1⁄2 bias): VLCD =
(---4-----×---------3----)
3
= 2.309Voff(RMS)
These compare with VLCD = 3Voff(RMS) when 1⁄3 bias is used.
It should be noted that VLCD is sometimes referred as the LCD operating voltage.
PCF8576C
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 10 — 22 July 2010
© NXP B.V. 2010. All rights reserved.
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