X1205V8T1

Overview

The X1205V8T1 is a Real-Time Clock (RTC) integrated circuit manufactured by Renesas Electronics Corporation. It provides clock and calendar functions via an I2C, 2-wire serial interface. The device operates within a supply voltage range of 2.7V to 5.5V, with battery backup support from 1.8V to 5.5V. It features time formats for HH:MM:SS in both 12-hour and 24-hour modes, and date formats for YY-MM-DD-dd. Key characteristics include alarm capabilities and leap year compensation. The component is housed in an 8-TSSOP package with dimensions of 0.173 inches (4.40mm) width. Maximum current consumption during timing is specified between 10µA and 20µA at the operating voltage range.

Feature Summary

• I2C, 2-wire serial interface for communication
• Real-time clock/calendar with HH:MM:SS and YY-MM-DD-dd formats
• Alarm functionality and leap year compensation
• Supply voltage: 2.7V ~ 5.5V; Battery voltage: 1.8V ~ 5.5V

Applications

• Data logging systems requiring precise time stamping
• Consumer electronics needing calendar and clock functions
• Industrial equipment with real-time monitoring requirements

Procurement Notes

Verify component status as discontinued or active through official Renesas channels. Confirm RoHS compliance status, as some variants may not meet current regulations. Check for moisture sensitivity level (MSL 1) handling requirements during storage and assembly. Ensure packaging type matches design specifications, typically tube or tape-and-reel for this series.

Selection Notes

Select based on required interface compatibility, specifically I2C support. Consider voltage ranges if battery backup is necessary, noting the 1.8V minimum for battery operation. Evaluate package constraints against PCB layout, specifically the 8-TSSOP footprint. Verify temperature range requirements against the -40°C to +85°C specification.

Part Context

The X1205V8T1 belongs to the X1205 family of RTC ICs from Renesas. This family offers standard timekeeping features with low power consumption. Variants differ primarily in packaging (e.g., TSSOP vs SOIC) and reel configurations (indicated by suffixes like 'T1').

Replacement Considerations

Check for direct pin-compatible substitutes within the X1205 series. Verify functional equivalence regarding I2C protocol and register mapping. Consider newer Renesas RTC models if discontinuation affects long-term supply.