PCF8576C datasheet(39/57 Pages) NXP

Part #	PCF8576C

Description	Universal LCD driver for low multiplex rates

PDF	57 Pages

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Manufacturer	NXP [NXP Semiconductors]

Direct Link	http://www.nxp.com

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PCF8576C

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Product data sheet

Rev. 10 — 22 July 2010

39 of 57

NXP Semiconductors

PCF8576C

Universal LCD driver for low multiplex rates

Excessive capacitive coupling between SCL or CLK and SYNC will cause erroneous

synchronization. If this is a problem you can increase the capacitance of the SYNC line (e.g. by an

external capacitor between SYNC and VDD.) Degradation of the positive edge of the SYNC pulse

can be countered by an external pull-up resistor.

Fig 31. Synchronization of the cascade for the various PCF8576C drive modes

Tfr = f

BP0

SYNC

BP0

(1/2 bias)

SYNC

BP0

(1/3 bias)

(a) static drive mode.

(b) 1:2 multiplex drive mode.

(d) 1:4 multiplex drive mode.

BP0

(1/3 bias)

SYNC

BP0

(1/3 bias)

mgl755

PCF8576C Datasheet(PDF) 39 Page - NXP Semiconductors