Time Synchronization Connector Specifications

Time synchronization

Table. Time synchronization connectors
Characteristic	Description
Time synchronization connectors	External: SMA female coax connector (see MCX- and SMA-based I/O) and RJ45 10/100/1000BASE-T connector (see RJ45 100/1000BASE-T connector) Internal: MCX female coax connector (see MCX- and SMA-based I/O)
Location	NT200A02-SCC older version NT200A02-SCC newer version

Input considerations

The time synchronization input interfaces of the SmartNICs are supplied with limited protection.

Warning: Connecting incompatible signal sources to time synchronization input interfaces might damage the SmartNIC hardware.

When a time synchronization input is configured for PPS signals, the rising edge is interpreted as on time.

MCX- and SMA-based I/O

This table specifies the time synchronization input interface for the MCX- and SMA-based inputs and outputs on the SmartNIC (the internal and external inputs, respectively).

Table. MCX- and SMA-based inputs and outputs
Mode	Type	Parameter	Value
Power off/ Interface off	–	Termination	100 kΩ DC
Power off/ Interface off	–	Current in clamping circuit	60 mA @ 5 V input Note: This only applies to external SMA-based inputs and not to internal MCX-based inputs.
PPS mode	In	Termination	50 Ω DC
		Rise/fall time	0 – 30 ns
		Input levels	Rising edge, TTL levels
		Pulse width	1 µs – 999 ms
		Current in clamping circuit	130 mA @ 5 V input
	Out	Rise/fall	0 – 10 ns
		Output levels	Rising edge, TTL levels @ 50 Ω load
		Pulse width	67 ms
NT-TS mode Note: This only applies to internal MCX-based inputs and not to external SMA-based inputs.	In	Termination	50 Ω AC
		Rise/fall time	0 – 30 ns
		Input levels	LVCMOS 2.5 V levels
		Pulse width	Proprietary NT protocol
		Current in clamping circuit	130 mA @ 5 V input
	Out	Rise/fall	0 – 10 ns
		Output levels	LVCMOS 2.5 V levels
		Pulse width	Proprietary NT protocol

RJ45 100/1000BASE-T connector

Supports precision time protocol (PTP) over Ethernet with data transfers of 100 or 1000 Mbit/s.

Available time synchronization cables

For information on available time synchronization cables, see DN-0186.