SSD1854U ETC [List of Unclassifed Manufacturers], SSD1854U Datasheet - Page 14

• Manufacturer Part Number: SSD1854U
• Description: LCD Segment / Common Driver with Controller CMOS
• Manufacturer: ETC [List of Unclassifed Manufacturers]

9
SSD1854
Series
Reference voltage input for internal DC-DC converter. The voltage of generated V
multiple factor (3X, 4X or 5X) times V
Note: Voltage at this input pin must be larger than or equal to AV
6.8
This pin is for oscillator frequency selection. A resistor must be connected between this pin and V
when using the internal oscillator. The suggested value of the resistor is 680K ohm. Please refer to the
Figure 8 for details.
6.9
This pin is an input pin to enable the internal reference voltage used for the internal regulator. When it
is high, an internal reference voltage source will be used. When it is low, and external reference must
be provided in V
6.10 DV
Digital and Analog power supply pins, must be connected to same external source.
6.11 V
Internally connected to DV
6.12 DV
Digital and Analog ground, must be connected to external ground.
6.13 V
Internally connected to DV
6.14 V
6.15 V
Voltage at this pin must be greater then V
internal DC-DC converter.
When using internal DC-DC converter as generator, voltage at this pin is for internal reference only. It
CANNOT be used for driving external circuitries.
6.16 C
When internal DC-DC voltage converter is used, external capacitor(s) is/are connected among these
pins.
6.17 V
This pin is the most positive LCD driving voltage. It can be generated by the internal regulator or
supply externally when internal regulator and divider are turned off.
6.18 V
This pin is an input to provide an external voltage reference for the internal voltage regulator when
REF pin is pulled low.
6.19 V
LCD driving voltages. They can be supplied externally or generated by the internal regulator and
divider or supplied externally when regulator and divider are turned off. They have the following
relationship:
V
L7
OSC1
REF
DD
SS
CI
CC
L7
EXT
L7
1P
> V
DD
SS
, V
, C
, AV
L6
, AV
L6
1N
> V
, V
, C
Rev 1.0
08/2002
EXT
SS
DD
L5
L5
3P
.
, V
> V
, C
L4
2P
L4
, V
, C
> V
DD
SS
L3
2N
for pull low purpose.
for pull high purpose. Can be connected to DVDD externally or float.
and V
L3
, and C
> V
L2
L2
CI
> V
4P
with respect to V
SS
L4
+ 2V. It can be supplied externally or generated by the
SS
.
DD
and DV
DD.
CC
equals to the
SOLOMON
DD