PCF85363ATT1/AZ vs RV-4162-C7-32.768KHZ-10PPM-TA-QC

Part Number	PCF85363ATT1/AZ	RV-4162-C7-32.768KHZ-10PPM-TA-QC
Category	Clock/Timing - Real Time Clocks	Clock/Timing - Real Time Clocks
Manufacturer	NXP USA Inc.	Micro Crystal AG
Description	IC RTC CLK/CALENDAR I2C 10TSSOP	IC RTC CLK/CALENDAR I2C 8-SMT
Package	Tape & Reel (TR)	Bulk
Series	Automotive, AEC-Q100	Automotive, AEC-Q200
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
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	1V ~ 4.4V
Current - Timekeeping (Max)	0.885µA @ 3.3V	0.5µA @ 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	8-WCDFN
Supplier Device Package	10-DFN (2.6x2.6)	8-SON (3.2x1.5)
Memory Size	64B	-
Voltage - Supply, Battery	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 to communicate with real-time clock in the device?

Real time clocks typically communicate with microcontrollers or other processors through I2C or SPI communication interfaces, allowing for the reading and setting of time and other related information.
3. Can real-time clocks be used to set timers or alarms?

Yes, many RTC chips have built-in alarm functions that can trigger interrupts at set times to perform specific tasks or wake up the system.
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.