Maxim Integrated DS1644Y-120+ Nonvolatile Timekeeping RAM

The DS1644Y-120+ is a state-of-the-art integrated device that combines a full-featured battery-backed real-time clock (RTC) with an NV SRAM data storage solution, all in one compact package. Manufactured by Maxim Integrated, this product is designed to maintain accurate time and date information, in addition to providing a reliable nonvolatile memory storage. It is particularly well-suited for applications where the preservation of data is crucial in the event of a power failure.

The RTC component of the DS1644Y-120+ provides a full binary-coded decimal (BCD) clock calendar that is accurate up to the year 2100. It includes an integrated crystal oscillator, which ensures high precision and reduces the number of external components required. The clock/calendar functionality includes seconds, minutes, hours, day, date, month, and year information, with automatic corrections for months with fewer than 31 days, including leap year compensation.

The nonvolatile SRAM storage offers 32KB of memory, which is protected during power loss by an onboard lithium energy source. This allows data to be retained for over 10 years in the absence of external power. The DS1644Y-120+ operates over a wide voltage range and features a 120ns access time, making it a fast and versatile choice for many applications.

The device is housed in a 28-pin EDIP (Encapsulated Dual In-line Package) or a 32-pin TSOP (Thin Small Outline Package), providing options for different space requirements on printed circuit boards. The DS1644Y-120+ is also designed with a JEDEC standard pinout, which makes it easy to integrate into existing designs without significant changes to board layouts.

Ideal for use in systems that require fail-safe data retention, such as industrial control systems, utility meters, and POS terminals, the DS1644Y-120+ is a robust and reliable choice for designers looking to combine real-time clock functionalities with secure data storage in a single, power-efficient integrated circuit.