scope:

This specification covers the general requirements and quality and reliability assurance requirements for bulkwave quartz crystal oscillators designed for frequency control or timekeeping in military electronic equipment. Statistical process control (SPC) techniques are required in the manufacturing process to minimize variation in production of crystal oscillators supplied to the requirements of this specification.

The military PIN consists of the letter "M", the basic number of the specification sheet, the dash number, and alphanumeric designators. An example of a PIN is as follows:

The product assurance level is identified by a single letter B or S designating the device class.

The dash number uniquely identifies the crystal oscillator.

Crystal oscillators shall be of the following temperature ranges:

A - −55°C to +125°C (except class S) B - −55°C to +105°C C - −20°C to +70°C D - −55°C to +85°C E - −40°C to +85°C J - Other (see 3.1)

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Research Laboratory, ATTN: AMSRL-EP-RD Fort Monmouth, NJ 07703-5601, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

The specified nominal frequency expressed in hertz is identified by a fixed field of eight characters consisting of seven digits and a letter (H, K, or M) representing, simultaneously, the decimal point and the appropriate multiplier as follows:

a. Greater than or equal to .01 hertz and less than 1,000 hertz, the letter "H" is used to represent the decimal point and multiplier.

b. Greater than or equal to 1,000 hertz, but less than 1 megahertz, the Letter "K" is used to represent the decimal point and multiplier.

c. Greater than or equal to 1 megahertz, the letter "M" is used to represent the decimal point and multiplier.

All digits preceding and following the letter (H, K, or M) of the group represent significant figures.

The following are examples of using the eight characters in constructing the specified frequency.

Designation Frequency H0100000 to H9999999 .01 to .9999999 hertz, inclusive 1H000000 to 9H999999 1.0 to 9.999999 hertz, inclusive 10H00000 to 99H99999 10 to 99.999999 hertz, inclusive 100H0000 to 999H9999 100 to 999.9999 hertz, inclusive 1K000000 to 9K999999 1 to 9.999999 kilohertz, inclusive 10K00000 to 99K99999 10 to 99.99999 kilohertz, inclusive 100K0000 to 999K9999 100 to 999.9999 kilohertz, inclusive 1M000000 to 9M999999 1 to 9.999999 megahertz, inclusive 10M00000 to 99M99999 10 to 99.99999 megahertz, inclusive 100M0000 to 999M9999 100 to 999.9999 megahertz, inclusive

The oscillators types are identified by a single number as follows:

Type 1 - Crystal Oscillators (XO) (see 6.3.1). Type 2 - Voltage Controlled Crystal Oscillators (VCXO) (see 6.3.2). Type 3 - Temperature Compensated Crystal Oscillators (TCXO) (see 6.3.3). Type 4 - Oven Controlled Crystal Oscillators (OCXO) (see 6.3.4). Type 5 - Temperature Compensated/Voltage Controlled Crystal Oscillators (TCVCXO) (see 6.3.5). Type 6 - Oven Controlled/Voltage Controlled Crystal Oscillator (OCVCXO) (see 6.3.6). Type 7 - Microcomputer Compensated Crystal Oscillator (MCXO) (see 6.3.7). Type 8 - Rubidium-Crystal Oscillators (RbXO) (see 6.3.8).

intended Use: