PCF1174CT Philips Semiconductors, PCF1174CT Datasheet - Page 4

• Manufacturer Part Number: PCF1174CT
• Description: 4-digit static LCD car clock
• Manufacturer: Philips 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)
G1
A1
D1
B1
C1
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
G3
D3
A3
B3
C3
F4
E4
15.625 ms
G4
Product specification
A4
D4
PCF1174C
MSA992
B4
C4
MSA996