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Product Description
The laser based 25Gigabit SFP28 ZR Transceiver is designed to transmit and receive serial optical data over single mode optical fiber with 80km.
They are compliant with SFF-8431&SFF-8432. The transmitter converts serial CML electrical data into serial
optical data. The receiver converts serial optical data into serial CML electrical data. Digital diagnostics functions are available via a 2-wire serial interface, as specified in SFF-8472.
Features
1310nm EML Laser
Single 3.3V Power supply
Power Dissipation < 2.5W
Duplex LC Connector Interface
Hot Pluggable SFP28 form factor
Integrated SOA & PIN-TIA ROSA
Operating data rate up to 25.78Gbps
Maximum link length of 80km on 9/125 SMF
Operating Temperature:Standard: 0℃ ~ 70℃，Industrial: -40℃ ~ +85℃
Applications
25GBASE-ZR
CPRI Option 10
Standard
SFP28 mechanical specification compliant with SFF-8431
Compliant with IEEE 802.3cc
Optical and Electrical Characteristics
|
Parameter |
Symbol |
Min. |
Typical |
Max. |
Unit |
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|
Transmitter |
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|
Center Wavelength |
λC |
1295 |
|
1310 |
nm |
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|
Average Output Power |
Pout |
2 |
|
7 |
dBm |
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|
Optical Modulation Amplitude |
POMA |
2 |
|
8 |
dBm |
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|
Average Power of OFF Transmitter |
POFF |
-30 |
|
-30 |
dBm |
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|
Side Mode Suppression Ratio |
SMSR |
30 |
|
|
dB |
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|
Spectral Width (-20dB) |
∆λ |
1 |
|
1 |
nm |
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|
Extinction Ratio |
ER |
8.0 |
dB |
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|
Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3}*(Note1) |
|
{0.25, 0.4, 0.45, 0.25, 0.28, 0.4} |
|
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|
Transmitter Dispersion Penalty |
TDP |
2 |
|
2.7 |
dB |
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|
Input Differential Impedance |
zin |
90 |
100 |
110 |
Ω |
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|
Differential input voltage |
vppin |
200 |
|
900 |
mv |
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|
Receiver |
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|
Center Wavelength |
λC |
1295 |
|
1310 |
nm |
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|
Average Receiver Sensitivity*(Note2) |
RSEN |
|
|
-28 |
dBm |
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|
Receiver Overload |
Pmax |
-3.5 |
|
|
dBm |
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|
LOS De-Assert |
LOSD |
|
|
-29 |
dBm |
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|
LOS Assert |
LOSA |
-40 |
|
|
dBm |
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|
LOS Hysteresis |
|
0.5 |
|
|
dB |
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|
Output Differential Impedance |
Zout |
90 |
100 |
110 |
Ω |
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|
Differential output voltage |
Vppout |
200 |
|
900 |
mV |
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Note:
1) Measured with a PRBS 2^31-1 test pattern @25.78125Gb/s, Hit ratio≤5E-5.
2) Average Receiver Sensitivity (max), measured with a PRBS 2^31-1 test pattern @25.78125Gb/s, ER=8.0dB, BER≤5E-5.
Absolute Maximum Ratings
|
Parameter |
Symbol |
Min. |
Max. |
Unit |
|
Storage Temperature |
Ts |
-40 |
+85 |
°C |
|
Maximum Supply Voltage |
VCC |
-0.5 |
4.0 |
V |
|
Operating Relative Humidity (non-condensation) |
RH |
- |
85 |
% |
Note:
Exceeding any one of these values may destroy the device permanently.
Recommended Operating Conditions
|
Parameter |
Symbol |
Min. |
Typ. |
Max. |
Unit |
|
Operating Case Temperature |
TC |
0 |
|
70 |
°C |
|
Operating Case Temperature |
TC |
-40 |
|
+85 |
°C |
|
Power Supply Voltage |
VCC |
3.15 |
3.3 |
3.45 |
V |
|
Power Supply Current |
ICC |
|
|
750 |
mA |
|
Maximum Power Dissipation |
PD |
|
|
2.5 |
W |
|
Bit Rate |
BR |
|
25.78 |
|
Gb/s |
|
Transmission Distance over SMF |
TD |
|
|
80 |
km |
Digital Diagnostic Functions
25G SFP28 transceivers provide an enhanced digital diagnostic.
|
Parameter |
Range |
Unit |
Accuracy |
Calibration |
|
Temperature |
0 to 70/ -40 to +85 |
°C |
±3°C |
Internal / External |
|
Voltage |
3.1 to 3.5 |
V |
±3% |
Internal / External |
|
Bias Current |
30 to 130 |
mA |
±10% |
Internal / External |
|
TX Power |
2 to 7 |
dBm |
±3dB |
Internal / External |
|
RX Power |
-28 to -3.5 |
dBm |
±3dB |
Internal / External |
Note:
The transceivers provide serial ID memory contents and diagnostic information about the present operating conditions by the 2-wire serial interface (SCL, SDA). The diagnostic information with internal calibration or external calibration all are implemented, including received power monitoring, transmitted power monitoring, bias current monitoring, supply voltage monitoring and temperature monitoring.
Electrical Pin-out Details
Pin Function Definitions
|
Pin |
Name |
Description |
Note |
|
1 |
VeeT |
Transmitter Ground |
1 |
|
2 |
TX Fault |
Transmitter Fault Indication |
2 |
|
3 |
TX Disable |
Transmitter Disable |
|
|
4 |
SDA |
Module Definition 2 |
3 |
|
5 |
SCL |
Module Definition 1 |
3 |
|
6 |
MOD-ABS |
Module Definition 0 |
|
|
7 |
RS0 |
RX Rate Select (LVTTL). |
5 |
|
8 |
LOS |
Loss of Signal |
4 |
|
9 |
RS1 |
TX Rate Select (LVTTL). |
5 |
|
10 |
VeeR |
Receiver Ground |
1 |
|
11 |
VeeR |
Receiver Ground |
1 |
|
12 |
RD- |
Inv. Received Data Out |
|
|
13 |
RD+ |
Received Data Out |
|
|
14 |
VeeR |
Receiver Ground |
1 |
|
15 |
VccR |
Receiver Power |
|
|
16 |
VccT |
Transmitter Power |
|
|
17 |
VeeT |
Transmitter Ground |
1 |
|
18 |
TD+ |
Transmit Data In |
|
|
19 |
TD- |
Inv. Transmit Data In |
|
|
20 |
VeeT |
Transmitter Ground |
1 |
Note:
1) Module ground pins GND are isolated from the module case.
2) Tx_Fault is an open collector/drain output, which should be pulled up with a 4.7k – 10k Ohms resistor on Host board.
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.
5) CDR control(Volatile parameter. Reset to default value on boot)
|
|
Hard PIN7 |
Soft RS0 Bit，A2H Byte 110d bit3 |
Mode of Operation |
|
RS0 |
0 |
0 |
Rx：9.8304Gb/s,10. 1376Gb/s or 10.3125Gb/s |
|
|
0 |
1(default) |
Rx:24.33024Gb/s or 25.78125Gb/s. Module auto detect data rate and CDR lock accordingly. |
|
|
1 |
0 |
|
|
|
1 |
1(default) |
|
|
|
Hard PIN9 |
Soft RS1 Bit，A2H Byte 118d bit3 |
Mode of Operation |
|
RS1 |
0 |
0 |
Tx：9.8304Gb/s,10. 1376Gb/s or 10.3125Gb/s |
|
|
0 |
1(default) |
Tx:24.33024Gb/s or 25.78125Gb/s. Module auto detect data rate and CDR lock accordingly. |
Mechanical Specifications
Order Information
|
Part No. |
Package |
Data Rate |
Fiber |
Distance |
Conn. |
Temp. |
DDMI |
|
HC-M25S-55-13-C |
SFP28 |
Up to 25.78Gbps |
SMF |
80km |
LC |
0~70℃ |
YES |
|
HC-M25S-55-13-I |
SFP28 |
Up to 25.78Gbps |
SMF |
80km |
LC |
-40~85℃ |
YES |
