New low current clock oscillators designed for high accuracy timing

Mercury Electronics Europe has announced a new range of temperature compensated crystal oscillators (TCXO) that are designed for high accuracy timing in a broad range of applications. The new ME32T series offers 15pF CMOS output at a frequency of 32.768kHz with a maximum frequency stability of ±5ppm over the industrial temperature range -40C to +85C. Typical current consumption of 1.5µA makes the ME32T suitable for use in battery-powered devices while its 3.28mm x 2.15mm x 1.3mm ceramic SMD package is ideal for microminiature and embedded applications. The new TCXOs are available with supply voltages of 1.8V, 2.5V, 3V, 3.3V and 5V (all ±5%). The company’s new low current clock features a proprietary temperature compensation technique applied to the built-in 32.768kHz tuning fork crystal and temperature sensor to deliver superior timekeeping accuracy of ±2.62minutes/year. Applications include frequency reference for RTCs, portable instruments, smart metering, data loggers, GPS transceivers, telematics and timing synchronisation for networks, hubs, routers and switches. Specifications include ageing of ±3pm/year maximum for first year, start-up time of 1s maximum at 25C, 3s maximum over industrial temperature range, rise/fall time of 100ns maximum and duty cycle (symmetry) of 50% ±10% typical.