MIL-SPEC · Electronic Components
CR77/U49M53333
Crystal Unit, Quartz
Part NumberCR77/U49M53333
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-01-094-7456 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Specified Frequency49.53333 MEGAHERTZ
Mode Of OscillationTHIRD OVERTONE AND FIFTH OVERTONE
Equivalent Resistance Value In Ohm40.0 MAXIMUM
Frequency Tolerance For Operating-0.002 TO 0.002 AND -0.003 TO 0.003
Drive Level Rating1.6 MILLIWATTS MINIMUM AND 2.4 MILLIWATTS MAXIMUM
Style Designator7 PIN TUBE BASE
Center To Center Distance Between0.184 INCHES MINIMUM AND 0.200 INCHES MAXIMUM
Test Data Document81349-MIL-C-3098/4 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE D
Terminal Diameter0.038 INCHES MINIMUM AND 0.042 INCHES MAXIMUM
Circuit ResonanceSERIES RESONANCE
Overall Thickness0.183 INCHES MAXIMUM
Cancelled NSN5955-01-143-1077 (cancelled)
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is CR77/U49M53333 available?
We can source CR77/U49M53333 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is CR77/U49M53333 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If CR77/U49M53333 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like CR77/U49M53333?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for CR77/U49M53333?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.