Epson Toyocom develops new high-stability real-time clock modules

Epson Toyocom Corporation has announced the commercial development of a pair of real-time clock modules featuring what’s said to be the industry's most accurate clock. The RX-4801SA and RX-8801SA boast an accuracy rating of ±5 seconds/month within an operating temperature range from 0°C to +40°C, and an accuracy rating of ±9 seconds/month at a range as wide as -40°C to +85°C.

Clocks that maintain high accuracy even in harsh operating environments subject to large temperature swings are needed in many applications, including in equipment and systems such as corporate server infrastructure, bank ATMs, utility meters, surveillance cameras and security systems.

Achieving high-accuracy clock functions in challenging temperature environments could be difficult with conventional real-time clock modules. Epson Toyocom's new modules alleviate the customer's burden by maintaining highly accurate clock functions over a wide range of temperatures without the need for compensating circuits or other additional engineering.

The superb accuracy of the new modules is enabled by a built-in 32-kHz TCXO circuit*3 boasting a frequency stability of ±1.9 x 10-6 over an operating temperature range of 0°C to +40°C and a frequency stability of ±3.4 x 10-6 over an operating temperature range of -40°C to +85°C.

The RX-4801SA supports a 4-wire serial interface, while the RX-8801SA is I2C-bus*4 interface compliant. Each is available in two versions (UA & UB) having different accuracy specifications.

EPSON