BQ4845S-A4NTR

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BQ4845S-A4NTR is a clock/timing real time clock manufactured by Maxim Integrated. It is an integrated solution with an integrated 32.768kHz crystal oscillator, an RTC and an alarm timer. It is designed to provide precise, reliable real time clock and alarm functions in a variety of applications, such as automotive, communications, security, medical and industrial. It is also suitable for use in robust, distributed and/or battery-powered systems.

The BQ4845S-A4NTR provides a single-chip solution for time-keeping and alarms. It contains a 32.768kHz crystal oscillator and a real-time clock (RTC) that includes a count-down timer, a periodic interrupt timer and a programmable frequency divider.

Additionally, the BQ4845S-A4NTR provides an alarm function for time-critical applications. The alarm circuit has an integrated alarm timer, with an alarm that can be triggered at any preset time. It can also be used to generate periodic interrupts, such as for data logging or time-critical tasks. The alarm timer has three output options – a low voltage detection (LVD) output, a time-up output and an auto-clear output.

The BQ4845S-A4NTR has an on-chip charge pump and regulator to maintain the real-time clock and alarm timer, even in a low-battery or power-off environment. An internal 32.768kHz oscillator is provided to maintain accuracy over temperature and aging.

The BQ4845S-A4NTR provides an integrated on-chip voltage monitor. The voltage monitor allows the system to detect a low-battery condition and to also monitor for other errors. It also allows for the detection of voltage surge, short-circuit and brown-out conditions.

The BQ4845S-A4NTR features an integrated I2C serial interface that can be used to write, read and update its real-time clock and alarm timer settings. Additionally, the I2C serial interface provides control for the power down mode. This allows for reliable operation in a low-power environment.

The BQ4845S-A4NTR is a low-power, single-chip solution that can provide precision timing and alarm functions in a variety of applications. It is ideal for use in real-time clock and timing applications such as automotive, communications, security, medical and industrial applications.

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