Descriptions
HSFP28-2321 is SFP28 module for duplex optical data communications support 25.78 Gb/s and 28.05 Gb/s data links. It is with the SFP+ 20-pin connector to allow hot plug capability. Digital diagnostic functions are available via an I2C. It has built-in dual clock and data recovery (CDR). This module is designed for single-mode fiber and operates at a nominal wavelength of 1310nm. The transmitter section uses a high performance 1310nm DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The receiver section uses an integrated InGaAs detector pre-amplifier (IDP) mounted in an optical header and a limiting post-amplifier IC.
Features
● Compliant with MSA SFP+ Specification SFF-8402
● Monitoring Interface Compliant with SFF-8472
● Single +3.3V Power Supply
● Hot-Pluggable
● Built-in dual CDR
● Support 25.78 Gb/s and 28.05Gb/s Data Links
● Up to 10Km on 9/125um SMF
● Very low EMI and excellent ESD protection
● Operating Case Temperature: 0℃~+70℃
● Power Dissipation < 1.2W
● RoHS Compliant Products
Application
● 25GbE
● 32GFC
● Other Optical Links
Pin Description
|
Pin
|
Symbol
|
Name/Description
|
Ref |
| 1 |
VeeT |
Transmitter Ground(Common with Receiver Ground) |
1 |
| 2 |
Tx Fault |
Transmitter Fault. Low normal operation, High Fault indication |
|
| 3 |
Tx Disable |
Transmitter Disable. Laser output disabled on high or open |
2 |
| 4 |
SDA |
Module Definition 2.Data line for Serial ID |
3 |
| 5 |
SCL |
Module Definition 1.Clock line for Serial ID |
3 |
| 6 |
MOD-ABS |
Module Definition 0.Grounded within the module |
|
| 7 |
RS0 |
Rate Select 0, optionally controls SFP28 module receiver. LVTTL Logic. |
5 |
| 8 |
LOS |
Loss of Signal indication. Logic 0 indicates normal operation. |
4 |
| 9 |
RS1 |
Rate Select 1, optionally controls SFP28 module transmitter. LVTTL Logic. |
5 |
| 10 |
VeeR |
Receiver Ground(Common with Transmitter Ground) |
1 |
| 11 |
VeeR |
Receiver Ground(Common with Transmitter Ground) |
1 |
| 12 |
RD- |
Receiver Inverted DATA out.AC Coupled |
|
| 13 |
RD+ |
Receiver Non-inverted DATA out.AC Coupled |
|
| 14 |
VeeR |
Receiver Ground(Common with Transmitter Ground) |
1 |
| 15 |
VccR |
Receiver Power Supply |
|
| 16 |
VccT |
Transmitter Power Supply |
|
| 17 |
VeeT |
Transmitter Ground(Common with Receiver Ground) |
1 |
| 18 |
TD+ |
Transmitter Non-inverted DATA in.AC Coupled |
|
| 19 |
TD- |
Transmitter Inverted DATA in.AC Coupled |
|
| 20 |
VeeT |
Transmitter Ground(Common with Receiver Ground) |
1 |
Notes:
1. Circuit ground is internally isolated from chassis ground. VeeR and VeeT may be internally connected within the SFP28 module.
2. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
3. Should be pulled up with 4.7k – 10kohms on host board to a voltage between 2.0V and 3.6V.
4. LOS is open collector output. Should be pulled up with 4.7k – 10kohms on host board to a voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.
5. Pulled low to VeeR or VeeT with a >30K resistor within the SFP28 module.