DS1643P-100+

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The DS1643P-100+ is a fully integrated, Serial Peripheral Interface, battery-backed real-time clock (RTC) and calendar. It integrates a real-time clock/calendar, 32 kBytes of SRAM, 1,024 bytes of EEPROM, and an SPI controller. This integrated solution eliminates the need for a separate RTC or external EEPROM in many applications. The DS1643P-100+ is ideal for applications where accuracy and data retention for extended periods is necessary. It features a high accuracy temperature compensated crystal oscillator (TCXO) oscillator with operating temperature range from -25°C to +85°C.

The DS1643P-100+ real-time clock/calendar is a programmable and backs up its operation with an external battery supply in the event of power interruption. Using TI’s ultra-low power technology, the device offers an incredibly low CMOS power consumption, ensuring the RTC continues to operate for years, even during power losses.

The integrated time-keeping features and alarms of the DS1643P-100+ make it easy to use for accurate time and date tracking in applications such as retail, automotive, and medical equipment, as well as industrial and consumer devices. The RTC and calendar are easily programmed using serial peripheral interface (SPI) with the on-chip SPI interface. Additionally, the RTC and calendar can be programmed through the EEPROM.

The RTC includes two comparators whose outputs can be programmed as alarms. When these traps are enabled and enable interrupts. Additionally, alarms, enable interrupts, and interrupt handling are all configurable. The DS1643P-100+ also includes two independent timers which can be set to 32-bit values and can be programmed to write data to specific memory addresses upon timer expiration.

The DS1643P-100+ is designed to meet the needs of applications where a low-cost, accurate, and low-power RTC solution is required. The device’s built-in TCXO oscillator, coupled with its ultra-low power supply voltage, provides an ideal combination of accuracy and low-power consumption for many real-time applications. Additionally, the DS1643P-100+ is designed to be easy to program, allowing for quick and easy integration into systems.

The DS1643P-100+ features an on-chip event recorder which can be programmatically configured to store events during times of power loss. It includes two 8-bit timer prescaler, four 8-bit digital counters and two 16-bit counter that are all programmable. Additionally, the event recorder can be set to capture specific events, providing logging of events with accurate time stamps to aid in debugging or system monitoring.

In summary, the DS1643P-100+ is the ideal solution for applications that require low-cost, accurate internal real-time clocks and integration of timers, interrupts, and digital counting. Its integrated TCXO oscillator ensures extended power backup throughout temperature ranges and its ultra-low power consumption ensures performance for many years. Finally, the event recorder allows for an in-depth look into power loss events, giving users the data needed to monitor and improve system performance.

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