RV5C386A-E2-F

Real Time Clock Overview

The RV5C386A-E2-F is a CMOS real-time clock IC featuring an I2C bus serial interface. It operates with a timekeeping supply voltage range of 1.45 V to 5.5 V and consumes a typical current of 0.35 µA at 3 V. The device supports BCD format for time and calendar counters, including automatic leap year identification up to 2099. Key features include two alarm circuits, a periodic interrupt circuit with selectable frequencies from 0.5 seconds to one month, and a 32-kHz clock output function. It incorporates built-in oscillation stabilization capacitors and a high-precision oscillation adjustment circuit. The IC is housed in an ultra-compact 10-pin SSOP-G package.

Real Time Clock Feature Summary

• I2C bus compatible interface supporting 400 kHz fast mode at VDD ≥ 2.5 V
• Low power consumption with typical timekeeping current of 0.35 µA at 3 V
• Integrated supply voltage monitoring circuit with selectable thresholds (1.6 V or 2.1 V)
• Built-in oscillation stabilization capacitors and precision frequency adjustment capability

Real Time Clock Applications

• Communication devices such as multi-function phones, portable phones, PHS, and pagers
• OA devices including fax machines and portable faxes
• Computer peripherals like desktop/mobile PCs, PDAs, and electronic notebooks
• AV components such as portable audio units, video cameras, digital cameras, and remote controllers
• Home appliances including rice cookers and electric ovens

Real Time Clock Procurement Notes

Verify the specific ordering suffix E2 for taping type and F for lead-free plating when sourcing. Confirm that the discontinued variant RV5C386A-E2-FB is not required. Ensure compatibility with the 10-pin SSOP-G footprint dimensions of 4.0 mm × 2.9 mm and 1.20 mm height during PCB layout planning.

Real Time Clock Selection Notes

Select this model if the design requires an I2C interface with fast mode support and integrated voltage monitoring. The built-in oscillation capacitors simplify external component requirements compared to standard RTCs. Ensure the system can handle the open-drain outputs on SDA, INTRA, and INTRB pins by providing appropriate pull-up resistors for the desired logic levels.

Real Time Clock Part Context

This component belongs to the RV5C386A series manufactured by Nisshinbo Micro Devices Inc. The manufacturer was formed by integrating New Japan Radio Co., Ltd. and Ricoh Electronics Devices Co., Ltd. The RV5C386A-E2-F is the active lead-free version, replacing the previously available Sn-Bi plated RV5C386A-E2-FB variant which has been discontinued.

Real Time Clock Replacement Considerations

The RV5C386A-E2-FB is discontinued; the RV5C386A-E2-F serves as the direct replacement with lead-free plating. No other cross-model substitutes are documented in the provided datasheet.