Microsemi SA.22c - Options for Supplying Power to the Adapter Test Board

SA.22c Rubidium Oscillator
Designer Reference and User Guide Revision D 19
Pin Signal Type Function
15 VSS GND Power and signal ground (All ground pins must be connected)
16 VSS GND Power and signal ground (All ground pins must be connected)
17 VSS GND Power and signal ground (All ground pins must be connected)
18 VSS GND Power and signal ground (All ground pins must be connected)
19 1PPS IN Input 1PPS input, positive edge triggered
20 1PPS OUT Output 1PPS output, may be enabled/disabled digitally
21 Lock Output If low, then the SA.22c is locked
22 Not available
23 VSS GND Power and signal ground (All ground pins must be connected)
24 FACMOS Output Frequency ACMOS signal output
25 VSS GND Power and signal ground (All ground pins must be connected)
26 SINE Output Sine signal output (50 ?)
J3, J4, J5, and J6 are SMA connectors used for signal outputs (J4 is a signal input) provided by the SA.22c.
The following table lists the SMA connectors' signal information.
Table 7 • SMA Connectors' Signal Information
SMA Signal Type Function
J3 1PPS OUT Output 1PPS output, may be enabled
/disabled digitally
J4 1PPS IN Input 1PPS input, positive edge triggered
J5 FACMOS Output Frequency ACMOS signal output
J6 SINE Output Sine signal output (50 Ω)
J7 is a 9-pin D-Sub connector used for transmitting/receiving data to and from the SA.22c through the
MSIP. The following table lists the D-Sub connector pin configuration.
Warning: When using J3, J4, J5, and J6, it is required that J2 must not be connected. Having J2 connected
will cause a loading effect on J3, J4, J5, and J6, which results in degraded signal integrity.
Table 8 • 9 Pin D-Sub Connector (J7)
Pin Signal Type Function
1 Not available
2 DOUT Output UART data out at ACMOS logic levels
3 DIN Input UART data in to SA.22c
4 Not available
5 VSS GND Signal ground
6 Not available
7 Not available
8 Not available
9 Not available
5.3 Options for Supplying Power to the Adapter Test Board
The SA.22c adapter test board design allows three power-supplying options.
The following figures show the block diagrams of the three different options for powering and setting up