V23815-U1306-MXXX Datasheet, PDF (2/9 Pages) Infineon Technologies AG – Parallel Optical Link: PAROLI T X AC, 1.6 Gbit/s

DESCRIPTION
PAROLI is a parallel optical link for high-speed data transmis-
sion. A complete PAROLI system consists of a transmitter
module, a 12-channel fiber optic cable, and a receiver module.
Transmitter V23814-U1306-M130
The transmitter module converts parallel electrical input signals
via a laser driver and a Vertical Cavity Surface Emitting Laser
(VCSEL) diode array into parallel optical output signals. All input
data signals are Low Voltage Differential Signals (LVDS). The
data rate is 250-1600 Mbit/s for each channel. Electrical input
data should be DC balanced within 144 bits. The maximum
time interval of consecutive 0’s and 1’s (run length) should not
exceed 72 bits. This will ensure that the output jitter values
given for the transmitter and receiver in this data sheet will be
met. Otherwise, jitter values will be exceeded.
A logic low level at -RESET switches all laser outputs off. During
power-up -RESET must be used as a power-on reset which dis-
ables the laser driver and laser control until the power supply
has reached a 3 V level.
An additional Laser Active output is low if a laser fault is
detected or -RESET is forced to low.
All nondata signals have LVCMOS levels.
Transmission delay of the PAROLI system is at a maximum 1 ns
for the transmitter, 1 ns for the receiver and approximately 5 ns
per meter for the fiber optic cable.
Figure 1. Transmitter block diagram
Electrical
Input
LE -LE laser enable
Optical
Output
12
Data In
LVDS
Input
Stage
12
Laser
Driver
Laser
Control
12
Laser
Diode
Array
12
Data
-RESET
Laser
Active
LASER SAFETY
The transmitter of the AC coupled Parallel Optical Link (PAROLI)
is an FDA Class 1 laser product. It complies with FDA regula-
tions 21 CFR 1040.10 and 1040.11. The transmitter is also an IEC
Class 3A laser product as defined by IEC 825-1.To avoid possi-
ble exposure to hazardous levels of invisible laser radiation, do
not exceed maximum ratings.
The PAROLI module must be operated under the specified
operating conditions (supply voltage between 3.0 V and 3.6 V,
case temperature between 0°C and 80°C) under any circum-
stances to ensure laser safety.
Caution
Do not stare into beam or view directly with optical
instruments. The use of optical instruments with this product
may lead to eye hazard.
Note
Any modification of the module will be considered an act of “manu-
facturing,” and will require, under law, recertification of the product
under FDA (21 CFR 1040.10 (i)).
Laser Emission
Indication of
laser aperture
and beam
Laser safety design considerations
To ensure laser safety for all input data patterns each channel is
controlled internally and will be switched off if the laser safety
limits are exceeded.
An internal control unit switches the respective data channel
output off if the input duty cycle permanently exceeds 57%.
The alerter will not disable the channel below an input duty
cycle of 57% under all circumstances.
The minimum alerter response time is 1 µs with a constant high
input, i.e. in the input pattern the time interval of excessive high
input (e.g. ’1’s in excess of a 57% duty cycle, consecutive or
non-consecutive) must not exceed 1 µs, otherwise the resptive
channel will be switched off. The alerter switches the respec-
tive channel from off to on without the need of resetting the
module.
All of the channel alerters operate independently, i.e. an alert
within a channel does not affect the other channels. To
decrease the power consumption of the module unused chan-
nel inputs can be tied to high input level. In this way a portion of
the supply current in this channel is triggered to shut down by
the corresponding alerter.
TECHNICAL DATA
The electro-optical characteristics described in the following
tables are valid only for use under the recommended operating
conditions.
Recommended Operating Conditions
Parameter
Symbol
Power Supply Voltage
Noise on Power Supply⁽¹⁾
Noise on Power Supply⁽²⁾
LVDS Input
Voltage Range⁽⁶⁾
V_CC
N_PS1
N_PS2
V_LVDSI
LVDS Input Differential
Voltage^{(3, 6)}
|V_ID|
LVDS Input Skew⁽⁴⁾
t_SPN
LVDS Input Rise/Fall Time⁽⁵⁾ t_R, t_F
LVCMOS Input
High Voltage
V_LVCMOSIH
LVCMOS Input Low Voltage V_LVCMOSIL
LVCMOS Input
Rise/Fall Time⁽⁷⁾
t_R, t_F
Min.
3.0
500
100
100
2.0
V_EE
Max.
3.6
10
100
1900
1000
50
300
V_CC
0.8
20
Units
V
mV
ps
V
ns
Notes
Voltages refer to V_EE=0 V.
1. Noise frequency is 1 kHz to 1 MHz. Voltage is peak-to-peak value.
2. Noise frequency is 1 MHz to 1 GHz. Voltage is peak-to-peak value.
3. |V_ID|=|(input voltage of non-inverted input minus input voltage of
inverted input)|.
4. Skew between positive and negative inputs measured at 50% level.
5. 20%–80% level.
Fiber Optics
V23814/15-U1306-M130 Parallel Optical Link: PAROLI™ Tx/Rx AC, 1.6 Gbit/s
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