PCF85363ATT1/AZ vs PCF85263AUKZ
| Part Number |
|
|
| Category | Clock/Timing - Real Time Clocks | Clock/Timing - Real Time Clocks |
| Manufacturer | NXP USA Inc. | NXP USA Inc. |
| Description | IC RTC CLK/CALENDAR I2C 10TSSOP | IC RTC/CAL ALM I2C WLCSP |
| Package | Tape & Reel (TR) | Tape & Reel (TR) |
| Series | Automotive, AEC-Q100 | - |
| Type | Clock/Calendar | Clock/Calendar |
| Features | Alarm, Leap Year, Watchdog Timer | Alarm, Leap Year, Watchdog Timer |
| Time Format | HH:MM:SS:hh (12/24 hr) | HH:MM:SS:hh (12/24 hr) |
| Date Format | YY-MM-DD-dd | YY-MM-DD-dd |
| Interface | I²C, 2-Wire Serial | I²C |
| Voltage - Supply | 0.9V ~ 1.8V, 0.9V ~ 5.5V | 0.9V ~ 5.5V, 1.8V ~ 5.5V |
| Current - Timekeeping (Max) | 0.885µA @ 3.3V | 0.885µA @ 3.3V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 10-XFDFN Exposed Pad | 12-XFBGA, WLCSP |
| Supplier Device Package | 10-DFN (2.6x2.6) | 12-WLCSP (1.19x0.94) |
| Memory Size | 64B | - |
| Voltage - Supply, Battery | 0.9V ~ 5.5V | 0.9V ~ 5.5V |
-
1. Why do devices require real-time clocks?
Real time clocks are used to record and maintain accurate time and date, especially in the event of equipment power failure. It is very important in applications that require timestamps, scheduled events, scheduled logs, and so on.
-
2. How does RTC maintain time even when the device is powered off?
RTC is usually equipped with an independent small battery (such as a button battery) to ensure that it continues to run for time when the device's main power is turned off, until the battery is depleted or re powered.
-
3. How often do RTC batteries need to be replaced?
The battery life of RTC can usually last for several years, depending on the type of battery used, the power consumption of RTC, and the ambient temperature. Generally speaking, button batteries can last for 5-10 years under normal conditions.
-
4. How to choose a suitable RTC chip?
When choosing RTC, factors such as power consumption, communication interface (I2C/SPI), time accuracy, whether there is a built-in crystal or external crystal required, battery support, temperature range, and whether there is an alarm function should be considered.
