PCF8820U Philips Semiconductors, PCF8820U Datasheet - Page 33

• Manufacturer Part Number: PCF8820U
• Description: 67 x 101 Grey-scale/ECB colour dot matrix LCD driver
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. The minimum value for V
2. All static currents are switched off in Power-down mode; no external clock.
3. V
4. The typical currents are measured on a sample base with the DDRAM and grey-scale registers loaded with data
5. Voltage multiplier disabled; pins V
2000 Dec 07
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TC
TC
TC
R
T
Temperature read-out
a
a
SYMBOL
tol
cp
EFERENCE TEMPERATURE
67 101 Grey-scale/ECB colour dot matrix
LCD driver
5
6
7
a) For V
b) For V
external clock with f
which would produce the display shown in Fig.23 if an LCD was connected. Extensive use of grey-scales will
increase current consumption compared to black and white mode. If specified, the maximum current is tested with a
regular pattern which is equivalent in current to the display shown in Fig.23.
DD1
= V
temperature coefficient 5
temperature coefficient 6
temperature coefficient 7
cut-point temperature
conversion constant
tolerance of a
DD1
DD1
DD2
> 4.5 V or V
= V
Fig.23 Display used to define DDRAM and grey-scales for current measurements.
4.5 V and V
PARAMETER
DD3
ext
= 2.75 V; LCD outputs are open-circuit; inputs connected to V
= 336 kHz; T
DD2
LCDIN
DD2
> 4.5 V: V
is limited by the supply voltages V
4.5 V: V
LCDIN
amb
same supply voltage V
repeatability
affect of changing V
, V
LCDIN
= 27 C.
LCDIN
LCDOUT
CONDITIONS
> highest value of V
> 4.5 V.
and V
33
LCDSENSE
DD
DD
DD1
DD1
connected together.
or V
and V
MIN.
DD2
DD2
.
:
23
1.13
2.55
2.72
2.98
DD1
MGT131
TYP.
or V
10
10
10
SS1
3
3
3
; I
Product specification
10
1
0.5
2
C-bus inactive;
MAX.
PCF8820
K
K
K
%
bit
bit/V
UNIT
C
C/bit
1
1
1