1SCOPE
1.1Scope. This specification establishes the detail requirements for hybrid, hermetically sealed, crystal
oscillators for use in space flight missions.
1.2Part number. The part number shall be as specified in Table I herein.
2APPLICABLE DOCUMENTS
2.1Specifications and standards. Unless otherwise specified, the following documents shall be applicable
to this specification to the extent specified herein.
SPECIFICATIONS
401-0298-001 Hybrid Crystal Oscillators, Class S, General Specification For
3REQUIREMENTS
3.1General requirements. The individual item requirements shall be as specified in the General
Specification with the exceptions, modifications, and additions specified herein.
3.2Approved manufacturer. Hybrid crystal oscillators shall be supplied from the manufacturer specified
in paragraph 7.1 herein.
3.3Design and construction.
3.3.1.Outline dimensions and terminal connections. The outline dimensions and terminal connections shall
be as shown in Figure 1 herein.
3.3.2.Package body and lead finish. The package body and lead finish shall be gold in accordance with
MIL-PRF-38534.
3.3.3.Active Devices. The microcircuit used in this part shall use CMOS technology and shall be from a
wafer proven to be radiation tolerant to 100 kRad (Si) total ionizing dose.
3.3.3.1CMOS microcircuit usage. For frequencies below 12 MHZ the output microcircuit shall be Intersil
Corporation 54ACS/HCS family, Silicon on Sapphire CMOS technology. For frequencies greater
than or equal to 12 MHZ, the CMOS microcircuit shall be 54AC00, see DSSC SMD 5962-87549.
This microcircuit is specified to be single event latchup free for LET up to 93 MeV-cm2/mg. For
output frequencies from 12 MHZ to 100 MHZ, the manufacturer shall be ST Microelectronics
Corporation; for output frequencies greater than 100 MHZ, the manufacturer shall be National
Semiconductor Corporation
3.4Performance requirements.
3.4.1.Maximum ratings. The maximum ratings shall be as specified in Table II herein.
3.4.2.Electrical performance characteristics and limits. The electrical performance requirements and limits
shall be in accordance with Table III herein.
3.4.3.Delta limits. Except for frequency aging (refer to Table III), delta limits shall be in accordance with
the General Specification.
3.4.4.Total dose radiation limits. Hybrid crystal oscillators supplied in accordance with this specification
shall be capable of meeting the performance requirements after being exposed to 100 krad total
dose radiation levels.
THIS DOCUMENT IS CONSIDERED PROPRIETARY TO Q-TECH CORPORATION
DO NOT COPY OR DISTRIBUTE WITHOUT Q-TECH CORPORATION APPROVAL
Q-Tech Corporation
10150 W. Jefferson Blvd.
Culver City, CA. 90232
Specification number: QT625C rev. D
Sheet 2 of 5