Name: 25G SPF28 AOC
Brand: T&S Communication Co, Ltd.

T&S Communication TSSP-8525G-xxxC 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, T&S 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.

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25G SPF28 AOC Specification Download

Specifications of 25G SPF28 AOC Cable

Absolute Maximum Ratings

Recommended Operating Conditions

Transmitter Specification

Receiver Specification

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

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

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

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

25G AOC Cable Pin Descriptions

25G SPF28 AOC Cable

SFP28 AOC Cable Pin Definitions

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

AOC 25G SPF28 Cable Technical Drawings

	L	L1	L2	L3	W	W1	W2	H	H1	H2
MAX	57.75	48.0	44.65	102.5	13.75	14	12.25	8.65	0.55	10.4
Typical	57.55	47.8	44.45	101.5	13.65	13.9	12.15	8.55	0.5	10.3
MIN	57.35	47.6	44.25	100.5	13.55	13.8	12.05	8.45	0.45	10.0

Applications of 25G SPF28 AOC Cable

Ideal for high-density networking applications
Low power usage is extremely valuable in high data rate applications
Perfect for point-to-point, intra-rack and rack-to-rack connections of 25Gb equipment