
16
12 X 2.7 GBPS PARALLEL OPTICAL TRANSMITTER/RECEIVER
Parameter
Symbol
Min
Typical
Max
Unit
Notes
Transmitter
Wavelength
λ
p
830
850
860
nm
RMS spectral width
λ
0.5
0.65
nm
SNAP12 MSA = 0.85 nm max
Average optical power
PAVG
-8.0
-2.0
dBm
Average optical power, disabled
-30
dBm
Optical output rise/fall time
trise/fall
160
ps
20% - 80%, unltered
Optical modulation amplitude
OMA
190
W
Equivalent to 6dB ER
at PAVG = -8dBm
Deterministic jitter
Dj
0.14
UI
±K28.5 pattern (note 1)
Total jitter
Tj
0.33
UI
223-1 pattern, BER<1x10-12 (note 1)
Channel to channel skew
TC-C
200
ps
Relative intensity noise
RIN
-130
-117
dB/Hz
1GHz, 12 dB reection
Receiver
Wavelength
λ
830
850
860
nm
Optical input power
Po
-2.0
dBm
Sensitivity
S
-16
dBm
note 2
Stressed sensitivity
SS
-12
dBm
note 3
Signal detect assert/negate level
SDA
-17
dBm
note 4
SDN
-30
dBm
Low frequency cutoff
FC
25
160
kHz
-3 dB, P<-16 dBm
Optical return loss
12
dB
Notes:
1. UI (Unit Interval): one UI is equal to one bit time. For example, 2.5 Gbits/s corresponds to a UI of 400 ps.
2. Sensitivity and saturation parameters using a Pseudo Random Bit Sequence (PRBS) 223 - 1, an extinction ration (ER) greater than 6 dB and a maximum bit error ratio (BER)
of 10-12. For sensitivity measurements, the maximum BER shall be maintained in the presence of the maximum crosstalk penalty. The maximum crosstalk possibility is dened
as the ‘victim’ receiver channel operating at its sensitivity limit and remaining eleven the ‘a(chǎn)ggressor’ receiver channels being actively driven at 6 dB higher incident power and
2.7 Gbps data rate. The minimum average optical power and minimum extinction ratio is equivalent to 30 mW Optical Modulation Amplitude (OMA).
3. Measured with stressed eye pattern at 2.7G Data rate with 2dB eye closure per the SNAP-12 MSA.
4. Signal Detect assertion requires all optical inputs to exhibit a minimum 6 dB Extinction Ratio at SDA = –17 dBm. All channels not under test are operating with PRBS 23 serial
encoded patterns, asynchronous with the channel under test, and an average input power up to 6 dB higher than the input power sensitivity specication.
3.6
Optical characteristics
(TCTX = 0°C to 80°C, TCRX = 0°C to 80°C, Vcc = 3.15V to 3.45V)
Data Rate / Standard
Fiber Type
Modal Bandwidth @ 850 nm (MHz*km)
Distance Range (m)
2.7 Gbps
62.5/125 m MMF
200
0 to 150
2.488Gbps / OC-48
50/125 m MMF
500
0 to 325
3.7
Link length
(TCTX = 0°C to 80°C, TCRX = 0°C to 80°C, Vcc = 3.15V to 3.45V)