PCF8531USLASH2 datasheet(32/44 Pages) PHILIPS

32 / 44 page

2000 Feb 11

Philips Semiconductors

Product speciﬁcation

× 128 pixel matrix driver

PCF8531

handbook, full pagewidth

MGS484

DISPLAY 34

× 128 PIXELS

VDD1

VDD3

I/O

VSS1

VSS2

Cext

Rsupply

RI/O

VLCD

PCF8531

128

Fig.25 Chip-on-glass application.

The required minimum values for the external capacitors in an application with the PCF8531 are as follows:

• Cext = 100 nF for VLCD and VSS1 and VSS2, and Cext = 470 nF for VDD1 to VDD3 and VSS1 and VSS2

• Higher capacitor values are recommended for ripple reduction

• For COG applications, the recommended ITO track resistance is to be minimized for the I/O and supply connections.

Optimized values for these tracks are below 50

Ω for the supply (Rsupply) and below 100 Ω for the I/O connections

(RI/O).

• To reduce the sensitivity of the reset to ESD/EMC disturbances for a chip-on-glass application, it is strongly

recommended to implement a series input resistance in the reset line (recommended minimum value 8 k

Ω) on the

glass (ITO). If the reset input is not used, it should be connected to VDD1 using a short connection.

PCF8531U/2 データシート(PDF) 32 Page - NXP Semiconductors