MAX6916EO33+

Real Time Clock Overview

The MAX6916EO33+ is a Real-Time Clock (RTC) IC manufactured by Analog Devices Inc./Maxim Integrated. It features a 3-wire SPI serial interface and supports both 12-hour and 24-hour time formats with calendar functionality. The device includes 96 bytes of non-volatile RAM for data storage and integrates a microprocessor supervisor. It operates within a supply voltage range of 3V to 3.6V and functions across an industrial temperature range of -40°C to +85°C. The component is housed in a 20-pin QSOP package.

Real Time Clock Feature Summary

• Integrated 3-wire SPI serial interface for communication
• 96-byte Non-Volatile RAM (NVRAM) capacity
• Built-in microprocessor supervisor with alarm capabilities
• Supports HH:MM:SS time format in 12/24 hour modes

Real Time Clock Applications

• Industrial control systems requiring precise timekeeping
• Data logging equipment needing non-volatile memory retention
• Embedded systems utilizing SPI-based microprocessors

Real Time Clock Procurement Notes

This component is listed as obsolete or end-of-life. Availability is restricted, and sourcing may require checking distributor inventories for remaining stock or authorized surplus channels. Verification of the specific EO33 suffix against current datasheets is recommended due to potential manufacturing changes associated with discontinued products.

Real Time Clock Selection Notes

Select this part when a 3-wire SPI interface is required instead of I2C. Ensure the system power supply remains within the 3V to 3.6V range. Verify that the 20-QSOP package dimensions fit the PCB layout constraints. Compare with the MAX6917 if I2C compatibility is preferred over SPI.

Real Time Clock Part Context

The MAX6916 series comprises RTCs with NVRAM controllers. The EO33 variant specifically denotes the 3V operating voltage version packaged in QSOP-20. It belongs to the broader family of Maxim Integrated clock and timer ICs designed for low-power embedded applications.