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F-tone 40G CFP SR4 Optical Transceiver Module
Features
Applications
Description
The CFP optical transceiver module are a high performance, low power consumption, short reach(1m to 300m) interconnect solution supporting 40G Ethernet. It is compliant with the CFP MSA and IEEE P802.3ba 40GBASE-SR4. F-tone CFP 40G SR4 modules offer 4 transmit and 4 receive asynchronous channels operating at up to 11.2Gbps per channel.
As shown in Figure 1, the transmitter side of the module consists of an array of VCSELs (Vertical Cavity Surface Emitting Lasers) and associated circuitry, which converts 4 parallel electrical data inputs to 4 parallel optical data output signals and also converts 4 parallel optical signals into 4 parallel electrical signals through an array of PIN photodiodes and associated circuitry.
Absolute Maximum Ratings
Parameter |
Symbol |
Min |
Max |
Unit |
Supply Voltage |
Vcc |
-0.3 |
3.6 |
V |
Input Voltage |
Vin |
-0.3 |
Vcc+0.3 |
V |
Storage Temperature |
Tst |
-20 |
85 |
oC |
Case Operating Temperature |
Top |
0 |
70 |
oC |
Humidity(non-condensing) |
Rh |
5 |
95 |
% |
Recommended Operating Conditions
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Supply Voltage |
Vcc |
3.13 |
3.3 |
3.47 |
V |
Operating Case temperature |
Tca |
0 |
70 |
oC |
|
Data Rate Per Lane |
fd |
- |
11.2 |
Gbps |
|
Humidity |
Rh |
5 |
85 |
% |
|
Power Dissipation |
Pm |
8 |
W |
Electrical Characteristics
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Differential input impedance |
Zin |
90 |
100 |
110 |
ohm |
Differential Output impedance |
Zout |
90 |
100 |
110 |
ohm |
Differential input voltage amplitude |
ΔVin |
120 |
820 |
mVp-p |
|
Differential output voltage amplitude |
ΔVout |
300 |
820 |
mVp-p |
|
Input Logic Level High |
VIH |
2.0 |
VCC |
V |
|
Input Logic Level Low |
VIL |
0 |
0.8 |
V |
|
Output Logic Level High |
VOH |
VCC-0.5 |
VCC |
V |
|
Output Logic Level Low |
VOL |
0 |
0.4 |
V |
Note:
1. Differential input voltage amplitude is measured between TxnP and TxnN.
2. Differential output voltage amplitude is measured between RxnP and RxnN.
Optical Characteristics
Transmitter Optical Specifications (T = 25°C, VCC =3.3V +/- 5%)
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Average Optical Power(per channel) |
Pout |
-7.5 |
2.5 |
dBm |
|
Average Optical Power(per channel) - Disabled |
Poff |
-30 |
dBm |
||
Optical Return Loss Tolerance |
12 |
dB |
|||
Extinction Ratio |
ER |
3 |
dB |
||
Center Wavelength |
λc |
840 |
850 |
860 |
nm |
RMS Spectral Width |
λ |
0.5 |
0.65 |
nm |
|
Transmitter eye mask |
Compliant to IEEE802.3ba eye mask specification |
Note:
1. Average optical power is measured at the output of the modules optical interface.
Receiver Optical Specifications (T = 25°C, VCC =3.3V +/- 5%)
Parameter |
Symbol |
Min |
Typical |
Max |
Unit |
Optical Power Sensitivity(per channel) |
Pin min |
-12 |
-9.9 |
dBm |
|
Optical Power Saturation(per channel) |
Pin max |
+1 |
dBm |
||
Stressed Receiver Sensitivity |
PS |
-5.4 |
dBm |
||
Center Wavelength |
λc |
840 |
850 |
860 |
nm |
RMS Spectral Width |
λ |
0.5 |
0.65 |
nm |
|
Optical Return Loss |
Rl |
12 |
dB |
||
Note:
1. Optical power sensitivity is measured with BER@10<sup< a="">>-12 at 10.3125Gbps per channel.