IoT brings a new dimension to frequency control, as it uses multiple protocols (Bluetooth, ZigBee, Z-Wave, 6LoWPAN, CSR Mesh / Bluetooth Low Energy (LE), Sigfox and Thread). Frequency control product manufacturers have to meet the demand for reliable, wireless frequency generation while, at the same time, increasing miniaturisation, reducing power consumption and providing consistent performance over a broad operating specification.
The SiT15xx 32.768 kHz MEMS timing solutions are designed for mobile, IoT and wearable applications where space and power are critical.
SiTime MEMS oscillators are said to offer high levels of integration, new packaging options and space savings, with surface mount and ultra-small chip-scale package (CSP) choices.
A particular benefit for IoT applications is the clocking for monitoring circuitry. The real-time clock (32.768 kHz) is always-on, contributing to extending the life of the battery.
The MEMS oscillators are available in a 2.0 x 1.2 mm (2012) SMD package for designs that require crystal resonator compatibility. The CSP MEMS oscillator reduces footprint by up to 80%, compared to existing 2012 SMD crystal packages and is 60% smaller than the 1610 crystal package (1.6 x 1.0 mm).
In addition to real time clock (RTC) products, SiTime offers the SiT8021, what it claims is the the industry's smallest and the lowest power MHz oscillator in a 1.5 x 0.8 mm CSP. This µPower oscillator is suitable for battery-operated applications, with low operating power of 270µA (max) and ≤0.7µA in standby mode, according to SiTime.
The programmable technology has been developed so that it ensures samples are availability from stock in all frequencies.