Product Descriptions

BL5372 is a low-power real-time clock circuit that can communicate in real-time with the CPU through an I2C two-wire interface circuit. It is mainly used in all systems that require a time base. This chip is capable of generating multiple periodic interrupt pulses (with a maximum cycle of up to one month) and also has two sets of time reporting systems. BL5372 integrates a low-power regulated power supply internally, which enables the oscillator to operate normally at very low power consumption even under harsh environmental conditions (typical value: 400nA@3.6V ）. BL5372 has the function of crystal oscillator stop detection latch, which can detect the validity of internal clock data by detecting this bit. BL5372 has a built-in digital time adjustment circuit, which can ensure high accuracy of clock timing, and has two crystal oscillator selection modes: 32KHz and 32.768KHz. This product is fully compatible with Ricoh RS5C372A.

Product Features

● Ultra low power consumption (typical value) 400nA@3.6V ）

● Real time clock (12 hour or 24 hour timing modes)

● Automatically recognize leap years and regular years (2000~2099)

● Clock counts represented by BCD codes (including hours, minutes, and seconds) and perpetual calendars (including leap years, regular years, months, days, and weeks)

● 30 second digital timing function

● Controllable 32.768KHz (or 32KHz) output

● Two programmable alarm clock outputs

● Two programmable square wave outputs provide multiple interrupts for the CPU (periodic interrupts ranging from one month to one second)

● Connect to the CPU through an I2C two-wire interface (maximum data clock frequency is 100KHz)

● The crystal oscillator stop detection latch function ensures the validity of clock data

● Selection of 32KHz and 32.768KHz crystal oscillators

● High precision time adjustment circuit ensures accurate clock timing

● Ultra low voltage operation (timing voltage can be as low as 1.2V, communication voltage can be as low as 1.8V)

● SOP8 or TSSOP8 packaging

Product Photos

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