Specifications:
The document outlines the specifications for HC-35/U quartz crystal units, which are AT-Cut and operate within a frequency range of 5 to 300 MHz. The crystals are housed in a welded metal enclosure with an inert atmosphere and wire leads.

Standards:
The product complies with several standards, including DIN 45110: T1A, IEC 122-3: CK, NFC 93-601: n0 12A, and MIL-H-10056: HC-35/U.

Temperature Stability:
The crystals maintain stability across a temperature range of -55°C to +105°C and -20°C to +70°C, with nominal temperature stability of ±5°C for oven applications.

Frequency and Tolerance:
The document provides detailed frequency ranges and corresponding tolerances for different overtone types, ranging from ±50ppm to ±2ppm. Calibration tolerance is specified at ±10 ppm.

Motional Resistance (R1):
The motional resistance varies with frequency, with maximum values specified for different overtone frequencies. For example, 1st overtone (5-10 MHz) has a maximum R1 of 80 Ω.

Capacitance:
Shunt capacitance is specified as 2.2pF ± 0.8pF for 5-10 MHz and 3.0pF ± 1.0pF for 10-300 MHz.

Additional Information:
Crystal units with different tolerances or additional data are available upon request. The document also includes dimensional specifications in millimeters.