25G SPF28 AOC

HANSUN Communication HX25-SFP28-AOCxM is a single-Channel, Pluggable, Fiber-Optic SPF28 for 25 Gigabit Ethernet and Infiniband EDR Applications. It is a high-performance module for short-range data communication and interconnect applications that operate at 25.78125 Gbps up to 70 m using OM3 fiber or 100 m using OM4 fiber. This module is designed to operate over multimode fiber systems using a nominal wavelength of 850nm. The electrical interface uses a 20 contact edge-type connector. As a mature AOC factory in China, HANSUN produces SPF28 Active Optical Cables that are direct-attach fiber assemblies with SPF28 connectors. They are suitable for very short distances and offer a cost-effective way to connect within racks and across adjacent racks.

Applications of 25G SFP28 AOC

25 GbE and 10GbE break-out applications for Datacom switch and router connections

Specifications of 25G SFP28 AOC

Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Storage Temperature	HX	-20	85	℃
Relative Humidity	RH	0	85	%
Case Operating Temperature	T_Case	0	70	℃
Supply Voltage	V_CC	-0.3	3.6	V

Recommended Operating Conditions

Parameter	Symbol	Min	Typical	Max	Unit
Case Operating Temperature	T_Case	0	–	70	℃
Supply Voltage	V_CC	3.13	3.3	3.47	V
Supply Current	I_cc	0	–	300	mA
Data Rate	DR	–	25.78125		Gbit/s

Transmitter Specification

Parameter	Symbol	Min	Typical	Max	Unit
Input differential impedance	Z_in	90	100	110	Ohm
Differential Data Input Swing	V_in	300	–	1100	mVp-p
Transmit Enable Voltage	V_EN	–	–	0.8	V
Transmit Disable Voltage	V_D	2.0	–	–	V
Average launch power	P_AVG	-7.5	-1	+2.5	dBm
Extinction Ratio	ER	2.0	–	–	dB
Center wavelength	λc	840	850	860	nm

Receiver Specifications

Parameter	Symbol	Min	Typical	Max	Unit
Center wavelength	λc	840	850	860	nm
Differential Data Output Swing	V_out	500	–	800	mVp-p
Bit Error Rate	BER	–	–	10^-12
Receiver Overload	P_inmax	2.5	–	–	dBm
Output Differential Impedance	Z_out	90	100	110	Ohm
LOS Fault	V_OH	2.4	–	–	V
LOS Normal	V_OL	–	–	0.4	V

- 25 GbE and 10GbE break-out applications for Datacom switch and router connections

Pin Definitions of 25G SPF28 AOC

PIN	Symbol	Name/Description
1	VeeT	Transmitter Signal Ground
2	TX_FAULT	Transmitter Fault (LVTTL-O) – Not used. Grounded inside the module
3	TX_DISABLE	Transmitter Disable (LVTTL-I) – High or open disables the transmitter
4	SDA	Two Wire Serial Interface Data Line (LVCMOS – I/O) (same as MOD-DEF2 in INF-8074)
5	SCL	Two Wire Serial Interface Clock Line (LVCMOS – I/O) (same as MOD-DEF1 in INF-8074)
6	MOD_ABS	Module Absent (Output), connected to VeeT or VeeR in the module
7	RS0	Rate Select 0 – Not used, Presents high input impedance.
8	RX_LOS	Receiver Loss of Signal (LVTTL-O)
9	RS1	Rate Select 1 – Not used, Presents high input impedance.
10	VeeR	Receiver Signal Ground
11	VeeR	Receiver Signal Ground
12	RD-	Receiver Data Out Inverted (CML-O)
13	RD+	Receiver Data Out (CML-O)
14	VeeR	Receiver Signal Ground
15	VccR	Receiver Power + 3.3 V
16	VccT	Transmitter Power + 3.3 V
17	VeeT	Transmitter Signal Ground
18	TD+	Transmitter Data In (CML-I)
19	TD-	Transmitter Data In Inverted (CML-I)
20	VeeT	Transmitter Signal Ground