Datasheet

January 1995 6
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver
HEF4543B
MSI
APPLICATION INFORMATION
Some examples of applications for the HEF4543B are:
• Driving LCD displays.
• Driving LED displays.
• Driving fluorescent displays.
• Driving incandescent displays.
• Driving gas discharge displays.
V
DD
V
TYPICAL FORMULA FOR P (µW)
Dynamic power 5 2 200 f
i
+∑(f
o
C
L
) × V
DD
2
where
dissipation per 10 10 400 f
i
+∑(f
o
C
L
) × V
DD
2
f
i
= input freq. (MHz)
package (P) 15 33 000 f
i
+∑(f
o
C
L
) × V
DD
2
f
o
= output freq. (MHz)
C
L
= load capacitance (pF)
∑ (f
o
C
L
) = sum of outputs
V
DD
= supply voltage (V)
Fig.6 Connection to common cathode LED display readout.