090-44300-00

Frequency and Timing SA.31m, SA.33m, and SA.35m Miniature Atomic Clock (MAC) SA.3Xm Features • High-precision atomic clock • Small form factor (standard OCXO pinout) • 1.5 μs typical holdover over temperature (SA.35m) • Low power consumption • RoHs 6/6-compliant Applications • Stand-alone (free-run) stable frequency source for audio equipment, LTE base stations, smart grid, and enterprise network Infrastructure • Extended holdover for CDMA and WiMAX base stations • Stability for various other communication and transmission applications www.microchip.com Newly Enhanced MAC SA.3Xm Family The Microchip SA.3Xm marks a major step forward in the evolution of rubidium atomic clocks. Based on a new generation of atomic clock technology, the SA.3Xm family has a unique package that enables unprecedented miniaturization in a rubidium clock. It is suitable for applications requiring compact design, low power consumption, low aging, and precision in an economical and easily adaptable package. Smallest Commercially Available Rubidium Clock Microchip has leveraged the significant advances in miniaturization and integration to design the world's first commercially available miniature atomic clock. The SA.3Xm has physical dimensions and packaging of a small ovenized crystal oscillator (OCXO), measuring 50.8 mm x 50.8 mm (2" × 2") and standing at a mere 18.3 mm (0.72"). The MAC is the world’s first commercially available rubidium coherent population trapping atomic clock. It consumes less power and has wide spectrum temperature operation. This makes it useful for a range of timing and synchronization applications—wireless base stations, wire line network infrastructure, defense systems, and test and measurement devices. The small size of the SA.3Xm enables it to be easily mounted to a PCBA. SA.31m The SA.31m is targeted for applications that require an economical solution for frequency stability, such as audio equipment in studio applications. It can also be used as an independent frequency source for next generation base stations, smart grid infrastructure and Enterprise network infrastructure. It enables transition from costly TDM backhaul transport to economic and efficient Ethernet transport. SA.33m The SA.33m has superior aging, tempco, and stability than the SA.31m. The SA.33m may be deployed in existing rubidium applications such as extended holdover (for CDMA/CDMA 2000 or WiMAX). SA.35m The SA.35m is the premium grade of the entire SA.3Xm family. It has the best tempco and greatest performance amongst all the versions of the family. The SA.35m is suited for applications such as extended hold over for LTE-TDD base stations and other applications that require precision frequency and long hold-over. Economical for its performance level, the SA.35m delivers premium performance at an excellent price. Specifications1 Electrical Environmental RF Outputs Specification Frequency 10 MHz Operating Temperature –10 °C to 75 °C baseplate Waveform CMOS square wave, 0 VDC–5 VDC(max) Magnetic Sensitivity