pcf8535 NXP Semiconductors, pcf8535 Datasheet - Page 42

• Manufacturer Part Number: pcf8535
• Description: 65 X 133 Pixel Matrix Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
13.1
The pinning of the PCF8535 is optimized for single plane
wiring e.g. for chip-on-glass display modules.
The required minimum value for the external capacitors in
an application with the PCF8535 are:
Between V
470 nF to 1 F): Between V
(recommended capacitor larger than the capacitor
between V
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
2001 Nov 07
handbook, full pagewidth
65
Application for chip-on-glass
133 pixel matrix driver
LCD
LCD
and V
and V
SS
SS
).
is 100 nF (min.) (recommended
DD
and V
SS
33
is 470 nF
R I/O
Fig.29 Application diagram (COG).
I/O
DISPLAY 65
3
PCF8535
V DD
42
133 PIXELS
133
connections. Maximum resistance for supply tracks
(R
resistance to the source (R
resistance reduces performance and increases current
consumption.
Three I/O lines are required for the COG module: SDA,
SCL and RES (optional). Other signals may be fixed on the
module to appropriate levels. R
minimized. In particular, if the I
temperature read back is required, the R
line must be carefully considered in conjunction with the
value of the external pull-up resistor.
Inputs SA0, SA1, OSC, T4, T5 and RES are CMOS inputs
and hence may be routed to V
high track impedances e.g. up to 100 k .
V SS
supply
) are 120 . Maximum values for the common
V LCD
R supply
R common
MGS687
32
common
SS
2
I/O
C-bus acknowledge or
) are 120 . Higher track
or V
should also be
Product specification
DD
using relatively
I/O
PCF8535
for the SDA