MAX6916EO30+

Real Time Clock Overview

The MAX6916EO30+ is an SPI-compatible real-time clock (RTC) with a microprocessor supervisor, alarm, and NV RAM controller. It provides timekeeping for seconds through year with leap-year compensation through 2099. The device includes 96 x 8 bits of static RAM for scratchpad storage. It features a watchdog timer, manual reset input, and battery monitor with low-battery warning. The EO30 variant specifies a typical VCC operating voltage of 3.0V with a range of 2.7V to 3.3V. It operates from -40°C to +85°C in a 20-pin QSOP package.

Real Time Clock Feature Summary

• SPI-bus-compatible serial interface supporting Modes 1 and 3
• Real-time clock/calendar with automatic leap-year correction through 2099
• Integrated microprocessor supervisor with configurable watchdog timer
• NV RAM controller with chip-enable gating and backup battery monitoring

Real Time Clock Applications

• Point-of-Sale Equipment
• Programmable Logic Controllers
• Intelligent Instruments
• Fax Machines
• Digital Thermostats

Real Time Clock Procurement Notes

Verify the specific EO30 suffix indicates the 3.0V nominal operating voltage range (2.7V to 3.3V). Confirm lead-free packaging status (+ suffix). Check current availability as this component may be subject to discontinuation or limited supply conditions.

Real Time Clock Selection Notes

Select the MAX6916EO30+ when a 3.0V nominal supply voltage is required. Ensure the system utilizes an SPI interface compatible with Modes 1 and 3. Verify that the 20-pin QSOP package fits the PCB layout constraints. Consider the integrated NV RAM controller if external SRAM power management is needed.

Real Time Clock Part Context

The MAX6916 series integrates RTC, supervisor, and NV RAM functions. The EO30 variant is distinguished by its 3.0V nominal VCC rating, compared to the EO33 (3.3V) and EO50 (5.0V) variants. All variants share the same pinout and functional capabilities within their respective voltage ranges.

Real Time Clock Replacement Considerations

The MAX6916EO33+ and MAX6916EO50+ are pin-compatible alternatives offering different nominal supply voltages (3.3V and 5.0V respectively). Ensure the system voltage aligns with the replacement part's specified operating range.