DS1390U-33+

The DS1390U-33+ is a real-time clock (RTC) IC designed by Maxim Integrated (now part of Analog Devices). It provides precise timekeeping and features a built-in lithium battery for backup, ensuring continuous operation even during power outages. The device operates on a supply voltage of 3.0V to 3.6V and includes a timekeeping function that tracks seconds, minutes, hours, day, date, month, and year, with automatic leap year compensation.
Additionally, the DS1390U-33+ offers a square wave output and programmable alarms, making it suitable for various timing applications in embedded systems. It interfaces easily with microcontrollers via a simple 2-wire I2C interface, allowing for easy integration into designs. The device is packaged in a compact, surface-mount format, which aids in saving board space in electronic applications. Its low power consumption makes it ideal for battery-operated devices.
Overall, it is a reliable choice for applications requiring accurate timekeeping, such as consumer electronics, industrial equipment, and automotive systems.

The DS1390U-33+ is a low-power, real-time clock (RTC) with a 3.3V operating voltage. Key features include:
- Timekeeping Accuracy: It provides high precision timekeeping with an accuracy of ±2 minutes per year.
- Battery Backup: The device can operate on a backup battery, ensuring timekeeping during power outages.
- Wide Temperature Range: It functions effectively within a temperature range of -40°C to +85°C.
- Interface: Utilizes a simple I2C interface for easy integration with microcontrollers.
- Watchdog Timer: Includes a watchdog timer to enhance system reliability.
- Programmable Output: Features a programmable square wave output for various applications.
- Low Power Consumption: Designed to consume minimal power in both active and backup modes.
These features make the DS1390U-33+ suitable for various applications, including consumer electronics, industrial systems, and automotive designs.

The DS1390U-33+ is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) format. This type of package is designed for surface mounting and is characterized by its thin profile and compact size, suitable for space-constrained applications.

The DS1390U-33+ is a real-time clock (RTC) with a total of 16 pins.
Pin Count and Functions:
1. VCC (Pin 1): Supply Voltage (+3.0V).
2. GND (Pin 2): Ground.
3. SCL (Pin 3): Serial Clock Input for I2C communication.
4. SDA (Pin 4): Serial Data Input/Output for I2C.
5. OUT (Pin 5): Output pin for alarm or oscillator signal.
6. ALARM (Pin 6): Alarm signal output.
7. INT (Pin 7): Interrupt signal output.
8. RST (Pin 8): Reset input to initialize the RTC.
9. X1 (Pin 9): Crystal oscillator connection.
10. X2 (Pin 10): Crystal oscillator connection.
11. VBACKUP (Pin 11): Backup battery input.
12. VREF (Pin 12): Reference voltage output.
13. A0, A1, A2 (Pins 13-15): Address pins for I2C addressing.
14. NC (Pin 16): No connection.
The device provides timekeeping functions, alarm features, and backup power capabilities.

The DS1390U-33+ is manufactured by Texas Instruments (TI), a multinational semiconductor company headquartered in Dallas, Texas. Texas Instruments designs and produces a wide range of electronics, including analog and embedded processing chips. Established in 1930, TI has a strong focus on innovation and technology, providing solutions for various industries such as automotive, industrial, communications, and consumer electronics. The company is known for its commitment to research and development, offering a robust portfolio of products that include microcontrollers, processors, and integrated circuits. TI is also recognized for its role in advancing educational initiatives in engineering and technology.

The DS1390U-33+ is a real-time clock (RTC) device primarily used in battery-backed applications for timekeeping in microcontroller-based systems. Common application areas include embedded systems, industrial automation, telecommunications, data loggers, and consumer electronics. It provides accurate timekeeping, low power consumption, and battery backup, making it suitable for applications requiring time-stamping and scheduling functions.

The DS1390U-33+ chip is a real-time clock (RTC) with a specific voltage and features. Equivalent products include:
1. MCP7940N - Microchip
2. PCF8523 - NXP Semiconductors
3. DS1307 - Maxim Integrated
These alternatives may vary in specifications, so check datasheets for compatibility based on your application requirements.