BQ4845S-A4TR

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The BQ4845S-A4TR is a low-power, low-voltage real-time clock (RTC) IC designed to measure time, offer timekeeping functions, and manage alarms. It is used in various applications such as energy management, medical devices, and automotive accessories. It is an efficient, cost-effective solution for the accurate time-keeping and management of alarms in products where an external clock or calendar circuitry is not needed.

The BQ4845S-A4TR is a real-time clock module that provides a high degree of accuracy, reliability, and stability. It features an ultra-low power design and a low voltage operation, making it suitable for battery-powered applications. It offers superior accuracy of up to +1ppm (part per million) over a temperature range of −40°C to +85°C, making it ideal for extremely precise time-keeping in data logging, security, and communication systems.

The BQ4845S-A4TR’s real-time clock features a 24-hour format and a calendar that follows the Gregorian calendar with the year ranging from 2000 to 2099. It supports internal oscillator accuracy of +/– 30ppm with aging of +/–2ppm/year, and an external clock input accuracy of +/–100ppm with aging of +/–2ppm/year. Additionally, it includes a programmable timer with adjustable interrupt pulse duration that can be used for frequently scheduled tasks or for power-on reset.

The BQ4845S-A4TR also features two programmable alarm outputs and a battery-backed SRAM of

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