HCF4054 STMicroelectronics, HCF4054 Datasheet - Page 10

• Manufacturer Part Number: HCF4054
• Description: LIQUID-CRYSTAL DISPLAY DRIVERS
• Manufacturer: STMicroelectronics

HCC/HCF4054B/55B/56B
TYPICAL APLLICATIONS (continued)
Figure 14 : Typical 3
In addition to the letters L, H, P, and A, five other let-
ters can be displayed through the use of simple
logic
HCC/HCF4055B or HCC/HCF4056B devices.
Fig. 13 is an example of a circuit that converts an ”H”
display, (code 1011) to an ”F” display. One condition
that must be met is that V
HCC/HCF4054B must be used to level shift in the
10/15
circuits
preceding
1
/
2
– Digit–crystal Display : (V
EE
= V
and
SS
. If V
following
EE
V
SS
, the
the
DD
= + 5V, V
appropri a te places. In a similar manner the letters C,
E, J,and U can be displayed. These circuits can also
be used to drive LED displays provided the exclu-
sive-OR gates have sufficient output-current drive.
The letters B, D, G, I, O, and S may be represented
by the codes for numbers 8, 0, 6, 1, 0, and 5, respec-
tively, when there is preknowledge that only letters
are to be displayed.
SS
= 0V, V
EE
= – 10V, DF
N
= 30 Hz square).