PCF1179 查看數據表（PDF） - Philips Electronics

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PCF1179

4-digit duplex LCD car clock

Philips Electronics 

Philips Semiconductors

4-digit duplex LCD car clock

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

when VDD = 4.5 V at +25 °C, then:

VDD = 3 to 4 V at +85 °C.

VDD = 5 to 6 V at −40 °C.

Product specification

PCF1179C

−8

V SS

(V)

−6

(3)

(2)

−4

(1)

MSA995

−2

0

40

0

40

80 T ( o C) 120

(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).

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

1997 Apr 16

5

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