参数资料
型号: PCF1178CT,112
厂商: NXP Semiconductors
文件页数: 7/20页
文件大小: 0K
描述: IC LCD CAR CLOCK 4DIGIT 28SOIC
标准包装: 27
显示器类型: LCD
配置: 7 段显示
数字或字符: 4 位数字
电流 - 电源: 950µA
电源电压: 3 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SO
包装: 管件
其它名称: 935006010112
PCF1178CTD
PCF1178CTD-ND
Philips Semiconductors
4-digit duplex LCD car clock
Product speci?cation
PCF1178C
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 SS and a level of V DD ? 5 V to V PP
2. The quartz-frequency deviation ? f/f is measured and (n) is calculated (see Table 1)
3. A first pulse t E is applied to the DATA input clears the EEPROM to give the highest backplane frequency
4. The calculated pulses (n) are entered in (t H , t L ). If the maximum backplane period is reached and an additional pulse
is applied the period will return to the lowest value.
5. The backplane period is controlled and when correct fixed by applying the store pulse t W
6. Release SEL and VPP.
Table 1
Time calibration ( ? t = 7.63 μ s; SEL at V SS )
OSCILLATOR-FREQUENCY DEVIATION
? f/f
( × 10 ? 6 )
0
+3.8
+7.6
+11.4
.
.
.
+117.8
1997 Apr 16
NUMBER OF PULSES
(n)
0
1
2
3
.
.
.
31
7
BACKPLANE PERIOD
(ms)
15.625
15.633
15.641
15.648
.
.
.
15.861
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