Q-Tech QT78TD User Manual

INCH-POUND

MIL-PRF-55310/28C
15 October 2008

SUPERSEDING
MIL-PRF-55310/28B
13 June 2005

PERFORMANCE SPECIFICATION SHEET

OSCILLATOR, CRYSTAL CONTROLLED, TYPE 1 (CRYSTAL OSCILLATOR (XO)),

1.0 MHz THROUGH 85 MHz, HERMETIC SEAL, SQUARE WAVE, TTL

This specification is approved for use by all Departments
and Agencies of the Department of Defense.

The requirements for acquiring the product described herein
shall consist of this specification sheet and MIL-PRF-55310.

Pin number Function

1 Enable/disable
2 GND
3 Output
4 B+

Inches mm Ltr

A N/A .560 N/A 14.22
B N/A .360 N/A 9.14
C .195 .205 4.95 5.21
D .086 .114 2.18 2.90
E .025 .055 .635 1.40
F N/A .378 N/A 9.60
G .292 .308 7.42 7.82
H .007 .009 .178 .229
J N/A .188 N/A 4.78
K .015 .021 .381 .533

Min Max Min Max

NOTES:

1. Dimensions are in inches.

2. Metric equivalents are given for general information only.

3. Unless otherwise specified, tolerances are ±.005 (0.13 mm) for three place decimals and ±.02 (0.5 mm) for
two place decimals.

FIGURE 1. Dimensions and configuration.

AMSC N/A FSC 5955

MIL-PRF-55310/28C

REQUIREMENTS:
Interface and physical dimensions: See figure 1.
Mounting: See figure 1.
Pads: See figure 1.
Seal: Hermetic in accordance with MIL-PRF-55310, maximum leakage rate 5 x 10
Weight: 3 grams, maximum.
Oscillator: Class 2 or any class 1 or class 3 oscillator meeting all class 2 requirements and verification tests

specified herein and in MIL-PRF-55310.
Calibration: Manufacturer calibrated.
Screening: In accordance with MIL-PRF-55310, product level B or S, as applicable.
Temperature:
Operating: See table I.
Storage: -62°C to +125°C.
Oscillator load: Standard TTL loads (see table I).
Output waveform: Symmetrical square wave.
Output voltage:
Logic 1: 2.4 V dc minimum at 400 μA source.
Logic 0: 0.5 V dc maximum with 16 mA sink.
Rise and fall times: See table I.
Duty cycle: See table I.
Supply voltage: +5 V dc ±10 percent.
Input current: See table I.
Enable/disable:
Output disabled (high impedance): Pin 1 input ≤ 0.8 V dc.
Output active: Pin 1 input ≥ 2.0 V dc or open.
Output frequency: Frequency as designated at time of acquisition (see table I).
Initial accuracy at reference temperature (up to 30 days after shipment): See table I.

-8

atm cc/s.

2