Microsemi SA.22c - 1 PPS Algorithm Operation; Factory Default; Setting the 1 PPS Synchronization

SA.22c Rubidium Oscillator
Designer Reference and User Guide Revision D 5
Pin Signal Type Function
12 SERVICE Output Indicates unit is nearing limits of frequency control and that service is
required within months.
13 DIN Input UART data in at ACMOS logic levels
14 Lock Output If low, indicates Rb oscillator is locked
15 1PPS IN Input 1PPS input, positive edge triggered
16 DOUT Output UART data out at ACMOS logic levels
17 Not available
18 Not available
Note: For more information on connector manufacturer's drawings and specifications, see Appendix:
.Using the Developer’s Kit (see page 16)
The following table provides information on the absolute maximum ratings for the SA.22c design.
Note: Unit in ambient still air convection (–10 °C to 75 °C).
Table 2 • SA.22c Design Absolute Maximum Ratings
Symbol Characteristic and Condition Value Unit
VDD Supply relative to ground 15 Vdc Input ±5 %
VCC Supply relative to ground 5 Vdc Input ±5 %
VIN Input voltage relative to
ground regardless of power
supply voltage
DIN and 1PPS IN –0.25 to 5.25 V
FREQ
CTRL
Analog external control Frequency control –0.25 to 5.25 V
PWU Maximum warm-up power <18.5 Watts
PQ Maximum quiescent power At –10 °C base plate 9.3 Watts
At 25 °C base plate 7.2 Watts
At 75 °C base plate 4.6 Watts
TWU Maximum warm-up time Lock time to <1 × 10 at 25 °C
–9
<7.5 Mins
TSTG Maximum storage temperature –55 to 85 °C
Vibration (operating) GR-63-CORE, Issue 4, April 2012, section 4.4.4 and
5.4.2 Opt2: Random Vibration 0.15 grms, unit locked
Maximum altitude (powered
unit)
With respect to sea level 30,000 Feet
Maximum altitude
(unpowered)
With respect to sea level 50,000 Feet