Drive 4056 Bedienungsanleitung PDF herunterladen (Seite 10)

TYPICAL APLLICATIONS (continued)

Figure 14 : Typical3

– Digit–crystal Display : (V

=+5V,V

= 0V, V

= – 10V, DF

= 30 Hz square).

In addition to the letters L, H,P, and A, five other let-

ters can be displayed through the use of simple

logic circuits preceding and following the

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. Onecondition

that must be met is that V

.IfV

≠ V

,the

HCC/HCF4054B must be used to level shift in the

appropriate places. Ina similar manner the letters C,

E, J,and Ucan be displayed. These circuitscan 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 fornumbers 8, 0,6, 1, 0, and 5, respec-

tively, when there is preknowledge that only letters

are to be displayed.

HCC/HCF4054B/55B/56B

10/15

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Drive 4056 Bedienungsanleitung Seite 10