PCF1178CT,118 NXP Semiconductors, PCF1178CT,118 Datasheet - Page 7

• Manufacturer Part Number: PCF1178CT,118
• Description: IC LCD CAR CLOCK 4DIGIT 28SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCF1178CT,118

• Package / Case: 28-SOIC (7.5mm Width)
• Display Type: LCD
• Configuration: 7 Segment
• Digits Or Characters: 4 Digits
• Current - Supply: 950µA
• Voltage - Supply: 3 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Number Of Digits: 4
• Maximum Clock Frequency: 4.19 MHz
• Operating Supply Voltage: 3 V to 6 V
• Maximum Power Dissipation: + 85 C
• Maximum Operating Temperature: + 85 C
• Maximum Supply Current: 3 mA
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Details
• Other names: 935006010118; PCF1178CTD-T; PCF1178CTD-T

Philips Semiconductors
The number (n) is stored in a non-volatile memory which is achieved by the following steps (see Fig.6):
1. Set SEL to V
2. The quartz-frequency deviation f/f is measured and (n) is calculated (see Table 1)
3. A first pulse t
4. The calculated pulses (n) are entered in (t
5. The backplane period is controlled and when correct fixed by applying the store pulse t
6. Release SEL and VPP.
Table 1 Time calibration ( t = 7.63 s; SEL at V
1997 Apr 16
OSCILLATOR-FREQUENCY DEVIATION
4-digit duplex LCD car clock
is applied the period will return to the lowest value.
SS
E
is applied to the DATA input clears the EEPROM to give the highest backplane frequency
( 10
+117.8
and a level of V
+11.4
+3.8
+7.6
0
f/f
.
.
.
6
)
DD
5 V to V
H
, t
L
PP
). If the maximum backplane period is reached and an additional pulse
SS
)
NUMBER OF PULSES
7
(n)
31
0
1
2
3
.
.
.
BACKPLANE PERIOD
W
15.625
15.633
15.641
15.648
15.861
Product specification
(ms)
PCF1178C
.
.
.