The following table provides information on the pin assignment and the function chart for SA.22c.
Table 5 • 18-Pin Samtec I/O Connector (J1)
Pin Signal Type Function
1 VSS GND Power and signal return ground (all ground pins must be connected)
2 VDD PWR 15 Vdc power input (all power pins must be connected)
3 VSS GND Power and signal return ground (all ground pins must be connected)
4 VDD PWR 15 Vdc power input (all power pins must be connected)
5 FREQ CTRL Analog Frequency control - analog input between 0 - 5 Vdc
6 VCC PWR 5 Vdc power input
7 1PPS OUT Output 1PPS output, may be enabled/disabled digitally
8 VSS GND Power and signal return ground (all ground pins must be connected)
9 FSCMOS Output (FACMOS) ACMOS output (frequency selectable at factory)
10 VSS GND Power and signal return ground (all ground pins must be connected)
11 VSS GND Power and signal return ground (all ground pins must be connected)
12 SERVICE Output Indicates unit is nearing limits of frequency control and that Service is
required within several 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
J2 is a 26-pin Molex receptacle connector used for delivering power, transmitting/receiving signals, and
data to and from the SA.22c. The following table lists the Molex pin configuration.
Table 6 • 26-Pin Molex Connector (J2)
Pin Signal Type Function
1 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
2 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
3 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
4 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
5 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
6 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
7 VINPUT PWR Power input 10 Vdc to 32 Vdc (All power pins must be connected)
8 SERVICE Output Service required within 30 days based on unit health
9 DOUT Output UART data out at ACMOS logic levels
10 DIN Input UART data in to SA.22c
11 FREQ CTRL Analog Frequency control analog voltage (0 to 5 Vdc)
12 VSS GND Indicates unit is nearing limits of frequency control and that service is
required within months
13 VSS GND Power and signal ground (All ground pins must be connected)
14 VSS GND Power and signal ground (All ground pins must be connected)
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