PCF8533USLASH2SLASHF2 datasheet(33/45 Pages) NXP

Il numero della parte	PCF8533U/2/F2

Spiegazioni elettronici	Universal LCD driver for low multiplex rates

PDF	45 Pages

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Produttore elettronici	NXP [NXP Semiconductors]

Homepage	http://www.nxp.com

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33 / 45 page

PCF8533_4

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Product data sheet

Rev. 04 — 5 March 2010

33 of 45

NXP Semiconductors

PCF8533

Universal LCD driver for low multiplex rates

The contact resistance between the SYNC pins of cascaded devices must be controlled. If

the resistance is too high then the device will not be able to synchronize properly. This is

particularly applicable to COG applications. Table 19 shows the limiting values for contact

resistance.

Fig 23. Synchronization of the cascade for the various PCF8533 drive modes

Table 19.

SYNC contact resistance

Number of devices

Maximum contact resistance

6000

3 to 5

2200

6 to 10

1200

11 to 16

700

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

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