X1288S16

Overview

The X1288S16 is a Real Time Clock/Calendar IC manufactured by Renesas Electronics Corporation. It features an integrated EEPROM and CPU Supervisor function, utilizing a 2-Wire Serial (I²C) interface for communication. The device operates within a supply voltage range of 2.7V to 5.5V and supports battery backup operation from 1.8V to 5.5V. It is housed in a 16-SOIC package with a width of 0.295 inches (7.50mm). The component supports surface mount mounting and functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Integrates real-time clock/calendar tracking with hundredths of a second resolution alongside non-volatile EEPROM storage.
• Includes a CPU supervisor circuit with programmable reset threshold and watchdog timer functionality.
• Supports low-power timekeeping via dedicated battery input pin for continuous operation during main power loss.

Applications

• Embedded systems requiring precise time-stamping and data retention
• Industrial control units needing CPU supervision and fault protection
• Consumer electronics with calendar and alarm capabilities

Procurement Notes

Verify the specific suffix code against official Renesas documentation to confirm exact electrical characteristics and package dimensions. Confirm product status as obsolete or active through authorized distributors prior to procurement planning. Ensure compatibility with existing I2C bus protocols and voltage levels in the target design environment.

Selection Notes

Select this component when a combined RTC, EEPROM, and supervisor solution is required in a single package. Evaluate the 16-SOIC footprint constraints against PCB layout requirements. Consider the 2-Wire serial interface limitations regarding bus speed and address conflicts within the system architecture.

Part Context

The X1288S16 belongs to the X1288 family of mixed-signal real-time clock devices. This series integrates memory and supervisory functions to reduce component count in embedded designs. The S16 designation specifically indicates the 16-pin Small Outline Integrated Circuit package variant offered by Renesas Electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Renesas Electronics technical support for current alternative recommendations or lifecycle transition plans.