pcf1174c NXP Semiconductors, pcf1174c Datasheet - Page 4

• Manufacturer Part Number: pcf1174c
• Description: 4-digit Static Lcd Car Clock
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTIONAL DESCRIPTION AND TESTING
Outputs
The circuit outputs static data to the LCD. Generation of
BP and the output signals are shown in Fig.4.
1997 Apr 16
4-digit static LCD car clock
TIME
TIME
AM
PM
Fig.3 Typical displays.
PM
a. 12-hour mode.
b. 24-hour mode.
E1
(b)
(a)
A1
G1
D1
C1
B1
Fig.2 Segment designation of LCD.
MSA994
F2
E2
MSA993
G2
A2
D2
4
B2
C2
The average voltages across the segments are:
1. V
2. V
P1 (P3)
P2 (P4)
ON(RMS)
OFF(RMS)
SEGMENT
OFF
ON
BP
Fig.4 Backplane and output signals.
F3
E3
= V
= 0 V.
V DD
V DD
V DD
DD
0
0
0
A3
G3
D3
C3
B3
E4
F4
15.625 ms
A4
G4
D4
Product specification
PCF1174C
MSA992
C4
B4
MSA996