BL5372 Real Time Clock IC, Dual Alarm, Ultra-Low Power, I²C Interface SOP8 TSSOP8

The BL5372 is a high-accuracy Real Time Clock (RTC) IC featuring two independent alarm sets and periodic interrupt generation from 2Hz to 1 month. Designed for ultra-low-power operation, it consumes only 400nA at 3.6V, making it ideal for battery-powered systems.
The device supports clock output adjustment, open-drain CLK/INT output, and communicates through a two-wire serial (I²C) interface. It operates across a wide 1.8V to 5.5V supply range and is available in SOP8 and TSSOP8 packages.

Key Specifications

• Alarm Sets: 2

• Periodic Interrupt: 2Hz to 1 Month

• Standby Current: 400nA @ 3.6V

• CLK / INT Output: Open Drain

• Clock Adjustment: Supported

• Interface: Two-wire Serial (I²C)

• VDD (Work / I/O): 1.8V – 5.5V

• Packages: SOP8, TSSOP8

Applications

• Smart meters

• Industrial controllers

• Battery-powered embedded systems

Features

• Dual programmable alarms

• Ultra-low standby current

• Wide operating voltage range