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Product Detailed Parameters
- Description：IC RTC CLK/CALENDAR I2C 20VSOJ
- Series：RX-8581JE
- Package：Strip
- Mfr：EPSON
- Type：Clock/Calendar
- Features：Alarm
- Memory Size：-
- Time Format：-
- Date Format：-
- Interface：I2C
- Voltage - Supply：1.8V ~ 5.5V
- Voltage - Supply, Battery：-
- Current - Timekeeping (Max)：0.8µA ~ 1.2µA @ 3V ~ 5V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Package / Case：20-LSSOJ (0.213", 5.40mm Width)
- Supplier Device Package：20-VSOJ
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Overview
The EPSON RX-8581JE:B I2C-BUS is a Real-Time Clock (RTC) integrated circuit designed for clock and calendar functions. It features an I2C, 2-wire serial interface and supports date formats of YY-MM-DD-dd and time formats of HH:MM:SS in 24-hour mode. The device operates within a supply voltage range of 1.8V to 5.5V and draws a maximum current of 0.8µA at 3V or 1.2µA at 5V during timing operations. It includes alarm capabilities and leap year compensation. The component is housed in a 20-LSSOJ package with a width of 5.40mm and is rated for industrial temperatures from -40°C to +85°C.
Feature Summary
- I2C Bus Interface: Supports standard 2-wire serial communication for data exchange.
- Low Power Consumption: Maximum current draw of 0.8µA @ 3V and 1.2µA @ 5V.
- Comprehensive Timekeeping: Handles YY-MM-DD-dd dates and HH:MM:SS 24-hour time with leap year adjustment.
- Wide Voltage Operation: Functional supply voltage range from 1.8V to 5.5V.
Applications
- Industrial control systems requiring precise time synchronization.
- Data logging equipment needing accurate timestamping.
- Embedded devices operating in wide temperature environments (-40°C to +85°C).
Procurement Notes
This component is listed as inactive or end-of-life by the manufacturer. Verification of availability should focus on distributor surplus stock or alternative sourcing channels, as new production may be discontinued. Confirm RoHS compliance status and specific packaging quantities with suppliers prior to ordering.
Selection Notes
Select this model when an I2C interface is required for RTC functionality in space-constrained designs utilizing the 20-VSOJ package. Ensure the system power supply remains within the 1.8V to 5.5V range. Verify that the application environment stays within the specified -40°C to +85°C operating temperature limits.
Part Context
The RX-8581JE series belongs to Epson's line of real-time clock ICs featuring I2C bus interfaces. The 'JE' suffix denotes the specific VSOJ-20 package variant. This part is distinct from other series like RX-8581NB or RX-8035LC which utilize different packages such as SON-22 or VSOJ-12.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the inactive status, direct pin-to-pin replacements from other manufacturers require independent verification against the official datasheet specifications.
