参数资料
| 型号： | PCF1178CT,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 6/20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
12/24-hour mode
Operation in 12-hour or 24-hour mode is selected by
connecting MODE to V DD or V SS respectively. If MODE is
left open-circuit and a reset occurs, the mode will change
from 12-hour to 24-hour mode or vice versa.
Power-on
After connecting the supply, the start-up mode is:
MODE connected to V DD : 12-hour mode, 1:00 AM.
MODE connected to V SS : 24-hour mode, 0:00.
MODE left open-circuit: 24-hour mode, 0:00 or 1:00.
Colon
If FLASH is connected to V DD the colon pulses at 0.5 Hz.
If FLASH is connected to V SS the colon is static.
Time setting
Switch inputs S1 and S2 have a pull-up resistor to facilitate
the use of single-pole, single-throw contacts. A debounce
circuit is incorporated to protect against contact bounce
and parasitic voltages.
Set enable
Inputs S1 and S2 are enabled by connecting ENABLE to
V DD or disabled by connecting to V SS .
Set hours
When S1 is connected to V SS the hours displayed
advances by one and after one second continues with one
advance per second until S1 is released (auto-increment).
Set minutes
When S2 is connected to V SS the time displayed in
minutes advances by one and after one second continues
with two advances per second until S2 is released
(auto-increment). In addition to minute correction, the
seconds counter is reset to zero.
1997 Apr 16
6
Product speci?cation
PCF1178C
Segment test/reset
When S1 and S2 are connected to V SS , all LCD segments
are switched ON. Releasing switches S1 and S2 resets the
display. No reset occurs when DATA is connected to V SS
(overlapping S1 and S2).
Test mode
When TS is connected to V DD , the device is in normal
operating mode. When connecting TS to V SS all counters
(seconds, minutes and hours) are stopped, allowing quick
testing of the display via S1 and S2 (debounce and
auto-increment times are 64 times faster). TS has a
pull-up resistor but for reasons of safety it should be
connected to V DD .
EEPROM
V PP has a pull-up resistor but for reasons of safety it should
be connected to V DD .
LCD voltage programming
To enable LCD voltage programming, SEL is set to
open-circuit and a level of V DD ? 5 V is applied to V PP (see
Fig.6). The first pulse (t E ) applied to the DATA input clears
the EEPROM to give the lowest voltage output. Further
pulses (t L ) will increment the output voltage by steps of
typically 150 mV (T amb = 25 ° C). For programming,
measure V DD ? V SS and apply a store pulse (t W ) when the
required value is reached. If the maximum number of steps
(n = 31) is reached and an additional pulse is applied the
voltage will return to the lowest value.
Time calibration
To compensate for the tolerance in the quartz crystal
frequency which has been positively offset (nominal
deviation +60 × 10 ? 6 ) by capacitors at the oscillator input
and output, a number (n) of 262144 Hz pulses are
inhibited every second of operation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCF1178CTD | 功能描述:LCD 驱动器 4 DIG DUPLX LCD CLCK RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| PCF1178CTD-T | 功能描述:LCD 驱动器 4 DIG DUPLX LCD CLCK RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| PCF1178CU | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-digit duplex LCD car clock |
| PCF1178CU/10 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-digit duplex LCD car clock |
| PCF1178CU/5 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:4-digit duplex LCD car clock |
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