MIL-SPEC · Electronic Components
CR-1A/AR6.577780MHZ
Crystal Unit, Quartz
Part NumberCR-1A/AR6.577780MHZ
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-00-851-5031 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Body Length1.155 INCHES MINIMUM AND 1.285 INCHES MAXIMUM
Specified Frequency6.57778 MEGAHERTZ
Drive Level Rating30.0 MILLIWATTS NOMINAL
Equivalent Resistance Value In Ohm60.0 NOMINAL
Frequency Tolerance For Operating-0.020 TO 0.020
Center To Center Distance Between0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM
Overall Width1.090 INCHES MINIMUM AND 1.170 INCHES MAXIMUM
Terminal Length0.595 INCHES MINIMUM AND 0.655 INCHES MAXIMUM
Operating Temp Range-55.0 TO 90.0 CELSIUS
Load Capacitance In Picofarads34.5 MINIMUM AND 35.5 MAXIMUM
Circuit ResonanceANTIRESONANCE
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 CR-1A/AR6.577780MHZ available?
We can source CR-1A/AR6.577780MHZ 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 CR-1A/AR6.577780MHZ by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If CR-1A/AR6.577780MHZ 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 CR-1A/AR6.577780MHZ?
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 CR-1A/AR6.577780MHZ?
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.