The PCF1172C is a Philips Semiconductors integrated circuit that drives a 31⁄2-digit LCD with AM and PM indicators. It has a working temperature range of -40 to +85 degrees Celsius.
The PCF1172C is a single-chip, 4.19 MHz CMOS clock circuit designed to drive a 3-digit liquid crystal display (LCD) with AM and PM indicators. It features an internal voltage regulator for 5 V LCD operation or an option for an external stabilized voltage supply. Time setting is accomplished using two external single-pole, single-throw switches.
| Oscillator frequency | 4.19 MHz |
|---|---|
| Operating ambient temperature | -40 to +85 °C |
| Package type | 40-lead plastic SMD, face down |
| Supply voltage (internal regulation) | 4 to 6 V |
| Supply voltage (external regulation) | 3 to 6 V |
| Current consumption (internal regulation) | 50 to 700 µA |
Yes, it has an internal voltage regulator for 5 V LCD operation.
Two external single-pole, single-throw switches are required.
The oscillator frequency is 4.19 MHz.