1997 Apr 16

5

Philips Semiconductors

Product specification

4-digit duplex LCD car clock

PCF1178C

LCD voltage (see Fig.5)

The adjustable voltage regulator controls the supply

voltage (see Section “LCD voltage programming”) in

relation to temperature for good contrast, for example

Fig.5 Regulated voltage as a function of temperature (typical).

(1) Programmed to 4.0 V at 25

°C (value within the specified operating range).

(2) Programmed to 4.5 V at 25

°C (value within the specified operating range).

(3) Programmed to 5.0 V at 25

°C (value within the specified operating range).

40

0

40

120

−8

−6

−2

0

−4

MSA995

80

T ( C)

o

V SS

(V)

(2)

(1)

(3)