V3025SO28A+ vs V3022SO28A+

Part Number	V3025SO28A+	V3022SO28A+
Category	Clock/Timing - Real Time Clocks	Clock/Timing - Real Time Clocks
Manufacturer	EM Microelectronic	EM Microelectronic
Description	VERY LOW POWER 8-BIT 32KHZ RTC M	VERY LOW POWER 8-BIT 32KHZ RTC M
Package	Tube	Tube
Series	-	-
Type	Clock/Calendar	Clock/Calendar
Features	Alarm, Leap Year, RAM	Alarm, Leap Year, RAM
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	-	-
Voltage - Supply	2V ~ 5.5V	2V ~ 5.5V
Current - Timekeeping (Max)	15µA @ 5.5V	15µA @ 3V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	28-SOIC (0.295\", 7.50mm Width)	28-SOIC (0.295\", 7.50mm Width)
Supplier Device Package	28-SOIC	28-SOIC
Memory Size	8B	8B
Voltage - Supply, Battery	-	-

1. What are the typical applications of RTC?

RTC is widely used in embedded systems, computers, consumer electronic devices (such as smartphones and cameras), industrial control systems, data recording devices, and any device that requires precise time maintenance.
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. 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.