DS1337C

Overview

The DS1337C is a low-power I2C serial real-time clock (RTC) manufactured by Analog Devices Inc. / Maxim Integrated. It provides year, month, date, day of the week, hour, minute, and second information using a BCD format. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports both 12-hour and 24-hour time formats. It features an industrial temperature range from -40°C to +85°C and is housed in a 16-pin SOIC package. The RTC includes automatic power-fail detection and switching capabilities to ensure continuous timekeeping during main power loss.

Feature Summary

• I2C Serial Interface: Compatible with standard and fast-mode I2C protocols for efficient data communication.
• Automatic Power-Fail Detection: Monitors VCC and switches to backup source upon failure to maintain timekeeping.
• Low Current Consumption: Time-keep current is typically 425 nA to 600 nA with oscillator enabled at 1.8V.
• Calendar Functionality: Includes leap-year compensation up to the year 2100.

Applications

• Data logging systems requiring precise timestamping
• Portable electronic devices with battery backup requirements
• Industrial control systems needing reliable time synchronization

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as legacy variants may differ. Check for obsolescence notices from Analog Devices, as some DS1337 family members are marked obsolete. Ensure packaging specifications match design requirements, noting that specific suffixes like #T&R indicate tape-and-reel packaging.

Selection Notes

Select the DS1337C when a 16-pin SOIC package is required for board layout constraints. Compare against the DS1337S if an 8-pin package suffices for space-limited designs. Verify voltage compatibility with the system's 1.8V to 5.5V operating range. Consider the DS1339 series if higher precision or additional features like alarm outputs are needed beyond basic timekeeping.

Part Context

The DS1337C belongs to the DS1337 family of serial real-time clocks from Maxim Integrated, now part of Analog Devices. This family is designed for applications requiring accurate timekeeping with minimal power consumption. The 'C' suffix typically denotes the 16-pin SOIC package variant, distinguishing it from other package options like DIP-8 or uSOP-8 found in related models such as DS1337+ or DS1337U+.

Replacement Considerations

Publicly confirmed substitute part numbers for the DS1337C are not available in the provided documentation. Designers should consult Analog Devices official resources for current cross-reference recommendations or pin-compatible alternatives within the DS1337/DS1339 families.