Overview
The PCF1179CT,118 is a single-chip 4-digit duplex LCD car clock circuit developed by NXP USA Inc. This integrated circuit is designed to provide a comprehensive solution for displaying time in hours, minutes, and seconds. It is particularly suited for automotive and other time-keeping applications where a clear and reliable display is essential.
Key Specifications
| Parameter | Value |
|---|---|
| Operating Frequency | 4.19 MHz |
| Display Type | 4-digit duplex LCD |
| Time Mode | 12-hour or 24-hour |
| Operating Ambient Temperature | -40°C to +85°C |
| Package Type | 28-lead plastic SMD (SO28) |
| Voltage Regulation | Internal voltage regulator, electrically programmable |
| Time Calibration | Electrically programmable, no trimming capacitor required |
| Backplane Signals | Three-level backplane signals at VDD, VDD/2, and 0 |
Key Features
- Internal voltage regulator that is electrically programmable for various LCD voltages
- Time calibration is electrically programmable, eliminating the need for a trimming capacitor
- LCD voltage adjusts with temperature to maintain good contrast
- Supports both 12-hour and 24-hour time modes
- Two external single-pole, single-throw push buttons for all time setting functions
- Internal 4.19 MHz oscillator
- Colon option input for displaying AM/PM or other indicators
Applications
The PCF1179CT,118 is primarily used in automotive applications for car clocks and other time-keeping devices. It can also be utilized in various industrial and consumer electronics where a reliable and clear LCD display is required.
Q & A
- What is the primary function of the PCF1179CT,118?
The primary function is to provide a 4-digit duplex LCD car clock circuit. - What are the operating temperature ranges for the PCF1179CT,118?
The operating ambient temperature range is -40°C to +85°C. - Does the PCF1179CT,118 support both 12-hour and 24-hour time modes?
Yes, it supports both 12-hour and 24-hour time modes. - How is time calibration achieved in the PCF1179CT,118?
Time calibration is electrically programmable and does not require a trimming capacitor. - What type of package does the PCF1179CT,118 come in?
The PCF1179CT,118 comes in a 28-lead plastic SMD (SO28) package. - Is the PCF1179CT,118 still in production?
No, the PCF1179CT,118 is obsolete and no longer manufactured. - What are some potential substitutes for the PCF1179CT,118?
Potential substitutes include the ICM7224IPL+ from Analog Devices Inc./Maxim Integrated. - How does the PCF1179CT,118 adjust LCD voltage?
The LCD voltage adjusts with temperature to maintain good contrast. - What is the role of the internal voltage regulator in the PCF1179CT,118?
The internal voltage regulator is electrically programmable for various LCD voltages. - How are time settings adjusted on the PCF1179CT,118?
Time settings are adjusted using two external single-pole, single-throw push buttons.
