SA.31m, SA.33m, and SA.35m Miniature Atomic Clock (MAC) SA.3Xm MAC Microsemi invented portable atomic timekeeping with the world's first family of miniature and chip scale atomic clocks. Choose MAC for best-in-class stability, size, weight, and power consumption. Features * High-precision atomic clock * Small form factor (standard OCXO pinout) * 1.5 s 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 Newly Enhanced MAC SA.3Xm Family The Microsemi 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, extended aging, and precision in an economical and easily adaptable package. Smallest Commercially Available Rubidium Clock Microsemi 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" x 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 widespectrum 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 and tempco, and better stability and phase noise 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. SA.31m, SA.33m, and SA.35m Miniature Atomic Clock (MAC) SA.3Xm MAC SA.3Xm Mechanical Diagram Note: Connect Pin 2 to GND externally. Pin 2 and Pin 4 are not connected together internally. SA.31m, SA.33m, and SA.35m Miniature Atomic Clock (MAC) SA.3Xm Specifications1 Environmental Electrical * Operating temperature -10 C to 75 C baseplate RF Output * Magnetic field sensitivity <7 x 10-11/Gauss (up to 2 Gauss) * Humidity GR-63-CORE, issue 4, April 2012, section 4.1.2 * Vibration (operating) 7.7 grms, at 1 hour/axis MIL-STD-810, figure 514.7E-1, category 24 (General Minimum Integrity Exposure) No loss of lock * Shock (operating) 30 g, 11 ms half-sine pulse per MIL-STD-202, Method 213, Test Condition J. Frequency perturbation 4 x 10- 9 momentary * Frequency 10 MHz * Waveform CMOS square wave, 0 VDC-5 VDC(max) * Logic level VOL(max) 0.55 V, VOH(min) 2.3 V * Rise/fail time <10 ns (15 pf, 1M load) * Duty cycle 50% 10% Built-in Test Equipment Output * Format CMOS * Logic 0 = Normal Operation 1 = Alarm Serial Communications * Protocol RS232 Storage and Transport (Non-operating) * Format CMOS 0 V to 5 VDC * Temperature -55 C to 100 C * Baud rate 57600 (8, N, 1) * Vibration (non-operating, unpackaged) 10.9 grms at 1 hour/axis per MIL-STD-810, figure 514.7E-1, Cat 24 * Shock (non-operating, unpackaged) 50 g, 11 ms half-sine pulse per MIL-STD-202, Method 213, Test Condition A Power Input * Supply voltage/current * Power consumption 5 VDC 0.1 VDC, max current <2.8 A Warm-up: 14 W max (-10 C to 75 C) Operating: 8 W at 10 C, 5 W at 25 C, 5 W at 75 C baseplate * Voltage coefficient <2 x 10-11 peak-to-peak (+5 VDC 0.1 VDC) Performance Parameters * Warm-up time (time to <1 x 10-9) <15 min (typical at 25 C) * Retrace <5 x 10-11 (on-off-on: 24 hours, 48 hours, 12 hours at 25 C) * Analog tuning Range: 1 x 10-8 Input: 0 V-5 V into 5 k * Digital tuning Range: 2 x 10-8 (resolution 1 x 10-12) * Time drift in a 24 hr period (SA.35m) 1.5 s, typical (-10 C to 70 C, 16 C/hr) * MTBF Per MIL-HDBK-217F: * 20 years at 40 C (ground, benign, GB) * 17 years at 40 C (ground, fixed, GF) Per Telcordia SR-332, Issue 1: * 20 years at 40 C (ground, fixed, uncontrolled) * Accuracy at shipment At 25 C and 5 VDC, unless otherwise specified. 1 <5 x 10-11 (25 C) SA.31m, SA.33m, and SA.35m Miniature Atomic Clock (MAC) SA.3Xm Phase Noise (SSB) Frequency 1 Hz 10 Hz 100 Hz 1 kHz 10 kHz Ordering Information Sa.35/SA.33m <-70 dBc/Hz <-87 dBc/Hz <-114 dBc/Hz <-130 dBc/Hz <-140 dBc/Hz <-85 dBc * Spurious (non-harmonic) SA.35m 7 x 10-11 1 x 10-10 SA.33m 1 x 10-10 1.5 x 10-10 Description3 SA.31m Rubidium Clock, AT Disabled SA.31m Rubidium Clock, AT Enabled SA.33m Rubidium Clock, AT Disabled SA.33m Rubidium Clock, AT Enabled SA.35m Rubidium Clock, AT Disabled SA.35m Rubidium Clock, AT Enabled SA.3Xm Developer's Kit AT = analog tuning 3 Temperature Coefficient (Peak-to-Peak) Temperature 0 C to 70 C -10 C to 75 C Part Number 090-44310-31 090-44310-32 090-44330-31 090-44330-32 090-44350-31 090-44350-32 090-44300-00 SA.31m <-65 dBc/Hz <-85 dBc/Hz <-112 dBc/Hz <-130 dBc/Hz <-140 dBc/Hz SA.31m 7 x 10-10 1 x 10-9 Aging Type Daily2 Monthly2 Yearly SA.35m/SA.33m 2.5 x 10-11 1 x 10-10 1 x 10-9 SA.31m 4 x 10-11 3 x 10-10 1.5 x 10-9 After 1 day and 1 month of operation, respectively. 2 Short-Term Stability (Allan Deviation) Type t=1s t = 10 s t = 100 s SA.35m/SA.33m 3 x 10-11 1.6 x 10-11 8 x 10-12 SA.31m 5 x 10-11 2.5 x 10-11 1 x 10-11 Physical * Weight <85 g (<3 oz) * Size 18.3 mm x 50.8 mm x 50.8 mm * Volume <49.5 cm3 (< 3.0 in3) RoHS Compliance * 6/6 RoHS-compliant Microsemi Corporate Headquarters One Enterprise, Aliso Viejo, CA 92656 USA Within the USA: +1 (800) 713-4113 Outside the USA: +1 (949) 380-6100 Fax: +1 (949) 215-4996 Email: sales.support@microsemi.com www.microsemi.com (c)2016-2018 Microsemi Corporation. All rights reserved. Microsemi and the Microsemi logo are registered trademarks of Microsemi Corporation. All other trademarks and service marks are the property of their respective owners. Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for aerospace & defense, communications, data center and industrial markets. Products include high-performance and radiation-hardened analog mixed-signal integrated circuits, FPGAs, SoCs and ASICs; power management products; timing and synchronization devices and precise time solutions, setting the world's standard for time; voice processing devices; RF solutions; discrete components; enterprise storage and communication solutions, security technologies and scalable anti-tamper products; Ethernet solutions; Power-over-Ethernet ICs and midspans; as well as custom design capabilities and services. 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