DS1315SN-33+

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The DS1315SN-33+ is a Real Time Clock and calendar dedicated to embedded systems. It provides long-term elapsed time counter, alarm interrupt and power failure reset. Built into a 28-pin packages, this chip features an atomic clock accuracy and a high level of integration.

The DS1315SN-33+ provides a software selectable 12- or 24-hour time format, an alarm with selectable trigger, interrupt, and a wide selection of output formats. It also has low-power consumption and high accuracy of ±3 minutes per month at 25°C. It also has a wide operating temperature from 0°C to +85°C.

The DS1315SN-33+ provides a wide range of applications from home appliances, industrial automation, medical and automotive. It can also be used in various embedded systems and devices such as digital cameras, digital video recorders, VoIP, access control systems and other time-sensitive applications that require high accuracy time tracking.

The DS1315SN-33+ uses the SN76489, which is a mixed-signal timer circuit, to quickly and accurately provide the frequency generation and time-keeping functions required by the chip. The frequency generator operates in both the analog and digital domain, providing a sine wave output across a small range of frequencies that are selectable in 1 Hz increments. This makes the chip suitable for applications such as real-time clocks, watchdogs, frequency-to-voltage converters, and pulse-width modulators.

The SN76489 is capable of generating both analog and digital signals. The chip also has a division register that can be used to divide down an external clock source. This allows the user to make fine adjustments to the time base for better time keeping. The division register also has an interrupt output that can be used to trigger an alarm or shut down an application if the external clock source fails.

The DS1315SN-33+ provides a 32 kHz clock output, an integrated crystal and a register to select from either a 2.5 kHz or 32 kHz clock source. With these features, the DS1315SN-33+ can provide a wide range of capabilities, including periodic interrupts and precision timing of events. It can be used to program and track the timing of events in medical monitors, in industrial process control systems, and in telecommunications applications.

The DS1315SN-33+ includes an 8-pin I2C serial interface that can be used to interface with other devices, such as microprocessors and memory. It also includes a programmable event control register (ECR), which can store multiple wakeup events and can be used to wake up a system on specified conditions. It also features an interrupt output that can be used to notify the processor when events occur.

In summary, the DS1315SN-33+ is a highly accurate Real Time Clock and Calendar device that provides the necessary time-keeping and frequency-generation functions for embedded systems. Through its variety of outputs and flexible programming, it is suitable for a wide range of architectures and devices.

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