ISL12022IBZ

The ISL12022IBZ is a low-power, I²C-interfaced real-time clock (RTC) with integrated battery backup and timing calibration, designed by Renesas. It features:
- Timekeeping with seconds, minutes, hours, day, date, month, and year.
- Battery backup (supports 2.0V–5.5V primary supply).
- I²C interface (up to 400kHz) for communication.
- Automatic leap-year compensation (up to 2099).
- Programmable clock output (32.768kHz, 1Hz, etc.).
- Timing accuracy adjustment (±30ppm correction).
- Alarm function with interrupt output.
- Ultra-low power (0.6µA typical in battery mode).
Ideal for embedded systems, meters, and portable devices, the ISL12022IBZ ensures reliable timekeeping with minimal power consumption. Its small 8-lead SOIC package makes it suitable for space-constrained designs.

Equivalent products to the ISL12022IBZ (RTC with EEPROM) include:
- DS3231 (Maxim Integrated) - Higher accuracy, no EEPROM.
- MCP7940N (Microchip) - Similar RTC + EEPROM, I²C interface.
- PCF85263A (NXP) - Low-power RTC, no EEPROM.
- RX8900CE (Epson) - High-precision RTC, optional EEPROM variants.
Check specs for exact compatibility, as features like EEPROM size, accuracy, and interfaces may vary.

The ISL12022IBZ is an 8-pin real-time clock (RTC) module with battery backup. Key functions include:
- I²C interface for communication.
- Clock/calendar with seconds, minutes, hours, day, date, month, and year.
- Alarm function with programmable interrupts.
- Battery backup (supports 2.5V–5.5V main power and 1.8V–5.5V backup).
- Low power consumption (400nA in battery mode).
- Automatic leap-year correction.
Package: 8-pin SOIC (150mil).
Pin functions:
1. Vbat (Battery backup)
2. GND (Ground)
3. SCL (I²C clock)
4. SDA (I²C data)
5. IRQ/FOUT (Interrupt/Frequency output)
6. NC (No connect)
7. VDD (Power supply)
8. PSW (Power switch control)
Concise and functional for embedded systems.

The ISL12022IBZ is available in an 8-lead SOIC (Small Outline Integrated Circuit) package. This surface-mount package is compact and widely used for integrated circuits, offering good thermal and electrical performance. The "IBZ" suffix typically denotes the specific package variant (SOIC) and reel packaging for automated assembly.