參數(shù)資料
型號: PCF8535U
廠商: NXP SEMICONDUCTORS
元件分類: 顯示驅動器
英文描述: 65 x 133 pixel matrix driver
中文描述: LIQUID CRYSTAL DISPLAY DRIVER, UUC
封裝: DIE
文件頁數(shù): 41/52頁
文件大?。?/td> 1765K
代理商: PCF8535U
1999 Aug 24
41
Philips Semiconductors
Objective specification
65
×
133 pixel matrix driver
PCF8535
handbook, full pagewidth
MGS687
3
DISPLAY 65
×
133 PIXELS
VDD1
to
VDD3
I/O
VSS1,
VSS2
Cext
Rsupply
Rcommon
RI/O
VLCD
PCF8535
133
33
32
Fig.23 Application diagram (COG).
The required minimum value for the external capacitors in an application with the PCF8535 are:
C
ext
for V
LCD
, V
SS1
and V
SS2
= 100 nF (min.) (recommended 470 nF to 1
μ
F); C
ext
for V
DD1
to V
DD3
, V
SS1
and
V
SS2
= 470 nF (recommended capacitor larger than the capacitor for V
LCD
, V
SS1
and V
SS2
).
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.
Maximum values for supply tracks (R
supply
) are 120
. Maximum values for the common resistance to the source,
(R
common
) are 120
. Higher track 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
I/O
should also be minimized. In particular, if the I
2
C-bus acknowledge or temperature
read back is required, the R
I/O
for the SDA line must be carefully considered in conjunction with the value of the external
pull-up resistor.
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