MICREL SY88232ALMG

SY88232L/AL
2.5Gbps Laser Diode Driver with Integrated
Limiting Amplifier
General Description
Features
The SY88232L is a single supply 3.3V integrated laser
driver and post amplifier for telecom/datacom applications
with data rates from 155Mbps up to 2.5Gbps. The driver
can deliver modulation current up to 85mA, and provides a
high compliance voltage that makes it suitable for highcurrent operation with the laser DC-coupled to it. The post
amplifier can detect signals with amplitude as low as
5mVPP.
The SY88232AL is a version of the SY88232L without 50Ω
termination resistors at the inputs of the driver and the post
amplifier. The SY88232AL is to be used specially in SFF
modules mounted on mother boards which have
preinstalled terminations. Removing post amplifier input
terminations will allow for receiver gain control.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
•
•
•
•
•
•
•
•
•
2.4V minimum laser compliance voltage
Operation up to 2.5Gbps
Integrated APC circuit
Modulation current up to 85mA
Bias current up to 70mA
Bias, Modulation, and power monitoring
High input sensitivity post amplifier, 5mVPP
Programmable LOS level
Available in 32-pin (5mm x 5mm) QFN package
Applications
• Multi-rate burst mode applications: A-PON, B-PON,
G-PON, E-PON, GE-PON
___________________________________________________________________________________________________________
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2009
M9999-063009-A
[email protected] or (408) 955-1690
Micrel, Inc.
SY88232L/AL
Ordering Information(1)
Part Number
Voltage
Temperature
Range
Package Type
Package Marking
Lead
Finish
SY88232LMG
3.3V
–40° to +85°C
QFN-32
SY88232L with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
SY88232LMGTR
3.3V
–40° to +85°C
QFN-32
SY88232L with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
SY88232ALMG
3.3V
–40° to +85°C
QFN-32
SY88232A with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
3.3V
–40° to +85°C
QFN-32
SY88232A with
Pb-Free bar-line indicator
NiPdAu
Pb-Free
(2)
(2)
SY88232ALMGTR
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = +25°C, DC Electricals only.
2. Tape and Reel.
June 2009
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SY88232L/AL
Pin Configuration
32-Pin QFN
Pin Description
Pin Number
Pin Name
Pin Function
1
LOS/SD_SEL
2
LOSLVL
Loss-of-Signal Level Set. A resistor from this pin to VCC sets the threshold for the data input
amplitude at which LOS will be asserted.
3
LOS/SD
Loss-of-Signal (LOS selected): asserts high when the data input amplitude falls below the
threshold set by LOSLVL.
LOS or SD selection, TTL input. Set high, connect to VCC, or leave open to select LOS. Set low
or connect to GND to select SD.
Signal Detect (SD selected): asserts low when the data input amplitude falls below the threshold
set by LOSLVL.
4
JAM
Active low TTL/CMOS. Internally pulled-up with 75kΩ. Connect to GND or apply a low level
signal (<0.8 V) to enable the post amp output. Can be shorted to LOS/SD (pin 3) to create a
squelch function. The polarity of this input follows the polarity of LOS/SD.
6
DIN+
SY88232L: Driver Non-inverting input data. Internally terminated with 50 Ω to a reference
voltage.
SY88232AL: Driver Non-inverting input data. No internal termination.
7
DIN-
SY88232L: Driver inverting input data. Internally terminated with 50 Ω to a reference voltage.
SY88232AL: Driver inverting input data. No internal termination.
9
/TXDIS
Transmitter Complementary Fast Disable. TTL input. The transmitter is enabled when this pin is
asserted High or left open and disabled when this pin is asserted Low. A 6.3kΩ resistor must be
installed between pin 10 and GND if /TXDIS is used as TTL input.
10
TXDIS
Transmitter Fast Disable. TTL Input. The transmitter is enabled when this pin is asserted Low
and disabled when this pin is asserted High or left open. A 6.3kΩ resistor must be installed
between pins 9 and GND if TXDIS is used as TTL input.
11
/TXEN
Active low TTL/CMOS. Internally pulled-up. Pull-down with a 22kΩ or lower resistance or apply
a low level signal (<0.8V) to enable bias and modulation. Keep floating or apply a high level
(>2V) to disable.
June 2009
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SY88232L/AL
Pin Description (continued)
Pin Number
Pin Name
Pin Function
12
APCSET
Bias current setting and control. The bias current is set by installing an external resistor from this
pin to ground or using a current source. Connect a 50kΩ resistor to GND for open loop operation.
13
MODSET
Modulation current setting and control. The modulation current is set by installing an external
resistor from this pin to ground or using a current source.
14
BIASMAX
Install a resistor between this pin and GND to set the maximum bias current for the closed loop
operation. The APC loop controls the bias current up to the level of BIASMAX. When the bias
current reaches the maximum value set through this pin, the driver continues to sink a current
equal to this maximum. For open loop operations, this pin sets the bias current.
15
MODMON
Modulation Current Monitor. Provides a current, which represents 1/100 of the modulation
current. Install a resistor between this pin and GND to convert that current to a voltage
proportional to the modulation current.
18
MOD-
Inverted modulation current output. Provides modulation current when input data is negative.
19
MOD+
Non-inverted modulation current output. Provides modulation current when input data is positive.
21
BIAS
22
MD
23
BIASMON
24
RSSI
25
APCFAULT
27
RIN+
Bias current output, sources current when /TXDIS is high. Connect to the cathode of the laser
through a resistor.
Input from the laser monitoring photodiode. Connect to the anode of the laser photodiode for APC
operation.
Bias Monitor. Provides a current, which represents 1/50 of the bias current. Install a resistor
between this pin and GND to convert that current to a voltage.
Received Signal Strength Indicator. Install a resistor from this pin to GND to get a voltage
proportional to the received signal.
Indicates APC failure when High. Active High TTL/CMOS. Use a 10kΩ Pull up.
SY88232L: Post amplifier Non-inverting input data. Internally terminated with 50 Ω to a reference
voltage.
SY88232AL: Post amplifier Non-inverting input data. No internal termination.
28
RIN-
SY88232L: Driver inverting input data. Internally terminated with 50 Ω to a reference voltage.
SY88232AL: Driver inverting input data. No internal termination.
30
ROUT-
Post Amplifier Complementary CML data output.
31
ROUT+
Post Amplifier true CML data output.
5, 8, 16, 24, 29
GND
17, 20, 32
June 2009
Ground. Ground and exposed pad must be connected to the plane of the most negative potential.
Supply Voltage. Bypass with a 0.1µF//0.01µF low ESR capacitor as close to VCC pin as possible.
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SY88232L/AL
Truth Tables
DIN+
DIN-
L
H
/TXEN
L
MOD+
(2)
H
MOD-
LOS/SD_SEL
Function
Selected
JAM
Output
H
LOS
L
Enabled
L
H
LOS
H
Disabled
SD
L
Disabled
SD
H
Enabled
Laser
Output
(3)
Power
L
H
L
L
L
H
H
L
X
X
X
H
L
L
L
Table 1. Modulation Output Truth Table
/TXEN
BIAS
L
ON
L
OFF
H
OFF
Table 2. BIAS Output Truth Table
Table 3. Post Amp Output Truth Table
(1, 3)
(1)
Notes:
1. Assuming /TXDIS = H and a 6.3kΩ resistor installed between TXDIS
and GND or TXDIS = L and a 6.3kΩ resistor installed between
/TXDIS and GND
2. IMOD = 0 when MOD+ = H.
3. Assuming that the cathode of the laser is connected to MOD+.
June 2009
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SY88232L/AL
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) ..................................... –0.5V to +4.0V
CML Input Voltage (VIN) ................... VCC–1.2V to VCC+0.5V
TTL Control Input Voltage (VIN) ............................. 0V to VCC
Lead Temperature (soldering, 20sec.) ..................... +260°C
Storage Temperature (Ts) ......................... –65°C to +150°C
Supply Voltage (VCC) .................................... +3.0V to +3.6V
Ambient Temperature (TA) .......................... –40°C to +85°C
(3)
Package Thermal Resistance
QFN
(θJA) Still-air ........................................................ 60°C/W
(ψJB) ................................................................... 33°C/W
DC Electrical Characteristics
TA = –40°C to +85°C and VCC = +3.0V to +3.6V, unless otherwise noted. Typical values are VCC = +3.3V, TA = 25°C, IMOD =
30mA, IBIAS = 30mA.
Symbol
Parameter
Condition
Min
Modulation and Bias currents
excluded
Typ
90
Max
150
Units
(4)
ICC
Power Supply Current
mA
VIL
TXDIS, /TXDIS, /TXEN, JAM,
and LOS/SD_SEL Input Low
-0.3
0.8
V
VIH
TXDIS, /TXDIS, /TXEN, JAM,
and LOS/SD_SEL Input High
2
VCC + 0.3
V
VMOD_MIN
Minimum Voltage Required at
the Driver Output, MOD+ and
MOD-, for Proper Operation
0.6
V
VBIAS_MIN
Minimum Voltage Required at
the Driver Output, BIAS pin, for
Proper Operation
0.8
V
IBIAS
Bias-ON Current
Voltage at Bias pin ≥ 0.8V
IBIAS_OFF
Bias-OFF Current
Current at BIAS pin when /EN is
high or TXDIS is low and a 6.3kΩ
installed between /TXDIS and
GND
RIN
Input Resistance at DIN+ and
DIN-
Single ended
(SY88232L only)
VOL
APCFAULT Output Low
IOL = 2mA
0.5
V
IOH
APCFAULT Output Leakage
VOH = VCC
100
µA
IMD
Current range at MD pin
1500
µA
Laser Driver
1
42.5
50
50
70
mA
150
µA
57.5
Ω
Notes:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied
at conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratings conditions for extended
periods may affect device reliability.
2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
3. Package Thermal Resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB. θJB uses a
4-layer and θJA in still air unless otherwise stated.
4. ICC = 150mA for worst-case conditions with IMOD = 85mA, IBias = 70mA, TA = +85°C, VCC = 3.6V.
June 2009
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SY88232L/AL
Post Amplifier
Symbol
Parameter
Condition
Min
Typ
Max
Units
LOSLVL
LOSLVL Voltage
VCC
V
VOH
ROUT+, ROUT- HIGH Voltage
VCC-0.020
VOL
ROUT+, ROUT- LOW Voltage
VCC-0.475
VCC-0.005
VCC
V
VCC-0.400
VCC-0.350
V
VRSSI
Maximum voltage at RSSI pin
1.2
V
VOFFSET
Differential Output Offset
Z0 (ROUT)
Single-Ended Output
Impedance
42.5
50
±80
mV
57.5
Ω
ZI (RIN)
Single-Ended Input Impedance
42.5
50
57.5
Ω
VCC -1.3
(SY88232L only)
VOL(LOS/SD)
LOS/SD Output Low
IOL = 2mA
0.5
V
IOH(LOS/SD)
LOS/SD Output Leakage
VOH = VCC
100
µA
June 2009
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SY88232L/AL
AC Electrical Characteristics
TA = –40°C to +85°C and VCC = +3.0V to +3.6V, unless otherwise noted. Typical values are VCC = +3.3V, TA = 25°C, IMOD =
30mA, IBIAS = 30mA.
Symbol
Parameter
Condition
Min
Typ
Max
Units
0.155
2.5
Gbps
100
2400
mVPP
10
85
mA
Laser Driver
Data Rate
NRZ
VDIFF-IN
(DIN)
Differential Input Voltage
Swing
IMOD
Modulation Current
IMOD_OFF
(5)
Modulation OFF Current
AC-coupled
DC-coupled, Voltage at MOD pin ≥0.6V
(6)
mA
Current at MOD+ when /TXEN is high or TXDIS is
low and a 6.3kΩ installed between /TXDIS and
GND
150
µA
Current at MOD- when /TXEN is high or TXDIS is
low and a 6.3kΩ installed between /TXDIS and
GND
150
µA
10
70
tr
Output Current Rise Time
20% to 80%, IMOD = 60mA
60
85
ps
tf
Output Current Fall Time
20% to 80%, IMOD = 60mA
60
85
ps
Jitter
tINIT
(7)
Total Jitter
APC Loop Initialization Time
155Mbps data rate
30
psPP
622Mbps data rate
30
psPP
1.25Gbps data rate
30
psPP
2.5Gbps data rate
30
psPP
Power up with /TXEN low, TXDIS high, and a
6.3kΩ installed between /TXDIS and GND
12
µs
/TXEN changes from high to low with power ON,
TXDIS high, and a 6.3kΩ installed between
/TXDIS and GND
10
µs
TXDIS changes from low to high with power ON,
/TXEN low, and a 6.3kΩ installed between /TXDIS
and GND
2.5
ns
622Mbps
720
ns
1.25Gbps
576
ns
2.5Gbps
576
ns
Notes:
5.
Load = 15Ω.
6.
Assuming VCC = 3.0V, Laser bandgap voltage = 1V, laser package inductance = 1nH, laser equivalent series resistor = 5 Ω, and damping resistor = 10Ω.
7.
Total jitter is measured using 27 – 1 PRBS pattern.
June 2009
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SY88232L/AL
Post Amplifier
Symbol
Parameter
Condition
tr , tf
Output Rise/Fall Time
(20% to 80%)
tJITTER
Deterministic
Random
VDiff_IN
(RIN)
Differential Input Voltage Swing
VDiff_OUT
(ROUT)
Differential Output Voltage
Swing
Note 8
GRSSI
RSSI Gain = IRSSI / VDiff_IN (RIN)
5mVPP ≤ VDiff_IN (RIN) ≤ 200mVPP
5
5mVPP ≤ VDiff_IN (RIN) ≤ 200mVPP
± 2.5
RSSI
Linearity
Min
Typ
Max
Note 8
60
120
Note 9
Note 10
15
5
5
700
LOSAL
Low LOS Assert Level
RLOSLVL = 15kΩ
LOSDL
Low LOS De-assert Level
RLOSLVL = 15kΩ
2
HSYL
Low LOS Hysteresis
RLOSLVL = 15kΩ, Note 11
LOSAM
Medium LOS Assert Level
RLOSLVL = 5kΩ
LOSDM
Medium LOS De-assert Level
RLOSLVL = 5kΩ
HSYM
Medium LOS Hysteresis
LOSAH
ps
psPP
psRMS
1800
800
Units
950
mVPP
mVPP
µA/
mVPP
%
8
mVPP
10
20
mVPP
1.5
2.6
6
dB
4
12
16
30
mVPP
RLOSLVL = 5kΩ, Note 11
1.5
2.8
6
dB
High LOS Assert Level
RLOSLVL = 100Ω
15
25
LOSDH
High LOS De-assert Level
RLOSLVL = 100Ω
36
50
mVPP
HSYH
High LOS Hysteresis
RLOSLVL = 100Ω
1.5
3.2
6
dB
TOFF
LOS Release Time
Note 12
2
10
µs
TON
LOS Assert Time
Note 12
2
10
µs
B-3dB
3dB Bandwidth
2.0
GHz
AV(Diff)
Differential Voltage Gain
38
dB
S21
Single-Ended Small-Signal
Gain
26
32
mVPP
mVPP
dB
Notes:
8.
Amplifier in limiting mode. Input is a 200MHz square wave.
9.
Deterministic jitter measured using 2.5Gbps K28.5 pattern, VID = 10mVPP.
10. Random jitter measured using 2.5Gbps K28.7 pattern, VID = 10mVPP.
11. This specification defines electrical hysteresis as 20log (LOS De-Assert/LOS Assert). The ratio between optical hysteresis and electrical hysteresis
is found to vary between 1.5 and 2 depending upon the level of received optical power and ROSA characteristics. Based on that ratio, the optical
hysteresis corresponding to the electrical hysteresis range 1dB-4.5 dB, shown in the AC characteristics table, will be 0.5dB-3dB Optical Hysteresis.
12. In real world applications, the LOS Release/Assert time can be strongly influenced by the RC time constant of the AC-coupling cap and the 50Ω
input termination. To keep this time low, use a decoupling cap with the lowest value that is allowed by the data rate and the number of consecutive
identical bits in the application (typical values are in the range of 0.001µF to 1.0µF).
June 2009
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SY88232L/AL
Typical Characteristics
Laser Driver
IBIAS vs. IBIASMAXSET
100
80
70
60
80
50
40
30
20
50
10
0
10
0.05
IBIASMON/IBIAS (mA)
90
0.04
70
0.03
60
0.02
40
30
0.01
20
0.00
0
0
50 100 150 200 250 300 350 400 450 500
0
0
IBIASMAXSET (µA)
Modulation Gain
80
70
60
50
40
30
20
10
0
0
10
20
30
40
10 20 30 40 50 60 70 80 90 100
50
RBIASMAXSET (kΩ)
IBIAS (mA)
IMOD vs. RMODSET
100
90
IMOD (mA)
IBIASMON Gain
IBIAS vs. RBIASMAXSET
100
90
50 100 150 200 250 300 350 400
100
90
80
70
60
50
40
30
20
10
0
0
IMODSET (µA)
5
10
15
20
RMODSET (kΩ)
25
30
Post Amplifier
IRSSI vs. RIN
LOSA and LOSD vs. RLOSLVL
100
1400
1200
1000
800
10
600
400
200
0
1
0
50
100
150
VDIFF_IN (mVPP)
June 2009
200
100
1000
10000
RLOSLVL (Ω)
10
100000
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SY88232L/AL
Functional Characteristics
Laser Driver
June 2009
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Functional Characteristics (continued)
Post Amplifier
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Functional Diagram
The SY88232L is shown. For the SY88232AL, 50Ω terminations should be removed from DIN± and RIN±.
June 2009
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diode anode through a series resistor. MOD+ and MODare terminated to VCC with a resistor in series with an
other resistor in parallel with an inductor. To minimize
the components count, MOD+ and MOD- can simply be
DC coupled to the cathode and anode of the laser
respectively with a single series resistor without
capacitor and without termination network.
Functional Description
Laser Driver
The laser driver is comprised from a modulator, a bias
circuit, and a digital APC loop.
The driver features bias and modulation current
monitoring functions, which can be configured for optical
power monitoring.
Post Amplifier
The post amplifier detects and amplifies signals with
data rates from DC up to 3.2Gbps, and amplitude as
small as 5mVPP. To reduce the noise at the output of the
post amplifier when the input signal is absent or lower
than the minimum detectable level set by LOSLVL, a JAM
pin is provided, which can be connected to LOS/SD
output to turn off the output buffer when LOSS/SD is
asserted.
BIAS and Modulation Setting
Bias and modulation currents are set by installing
resistors from APCSET to ground and from MODSET to
ground respectively or by applying a negative current at
those pins. IBIAS variation versus RBIASMAXSET resistor and
IBIASMAXSET , and IMOD variation versus RMODSET resistor
and IMODSET are shown on page 10.
BIASMAX
A resistor between BIASMAX pin and ground sets the
maximum bias the driver can sink. At normal operation,
the bias current tracks the laser optical power through
the laser monitoring photodiode and the APC loop to
compensate for any power deviation from the nominal
value set at the start of operation using APCSET. If for
any failure (laser or photodiode degradation, open
feedback circuit etc…) the APC loop keeps increasing
the bias current to compensate for the low power
indication, the bias current will stop increasing when it
reaches BIASMAX value and continues to operate at
that maximum value and APCFAULT is asserted.
BIASMAX also sets the bias current when the circuit is
operating in the open loop mode.
Input Amplifier/Buffer
Figure 1-d shows a simplified schematic of the input
stage. The high-sensitivity of the input amplifier allows
signals as small as 5mVPP to be detected and amplified.
The input amplifier allows input signals as large as
1800mVPP. Small input signals below typically 12mVPP
are linearly amplified with a typically 38dB differential
voltage gain. For input signals larger than 12mVPP, the
output signal is limited to typically 800mVPP.
Output Buffer
The post amplifier CML output buffer is designed to drive
50Ω lines and is internally terminated with 50Ω to VCC.
Figure 1e shows a simplified schematic of the output
stage.
APC Loop Function
At start up, with the driver enabled, TXDIS low and
/TXEN low, the laser turns ON within a few
microseconds and its back facet monitoring photodiode
starts to generate a photocurrent proportional to the
optical power. The photocurrent is fed back to the MD
pin on the driver where it’s converted to a voltage. The
conversion voltage is compared to APCSET on the
driver. At equilibrium, the feedback voltage equals the
APCSET voltage and the laser optical power reaches its
nominal value. If the laser power deviates from its
nominal value, the APC loop brings it back to its nominal
setting.
Loss-of-Signal
The post amplifier generates a selectable chatter-free
loss-of-signal (LOS) or signal detect (SD) open-collector
TTL output as shown in Figure 2d. LOS/SD is used to
determine that the input amplitude is too small to be
considered as a valid input. When the LOSS function is
selected (LOS/SD_SEL=1), LOS/SD asserts high if the
input amplitude falls below the threshold set by LOSLVL
and de-asserts low otherwise. IF SD function is selected
(LOS/SD_SEL=0), LOS/SD asserts low if the input
amplitude falls below the threshold set by LOSLVL and
de-asserts high otherwise. LOS/SD can be fed back to
the JAM input to maintain output stability under a loss of
signal condition. Jam de-asserts low the true output
signal without removing the input signals. Typically, 3dB
LOS hysteresis is provided to prevent chattering.
APC Loop Failure
The APCFAULT is asserted High if the bias current
reaches BIASMAX or if the APC loop counter reaches its
minimum or its maximum counts.
Loss/Signal Detect Selection
A pin (LOS/SD_SEL) is provided to select between LOS
(set to high) or SD (set to low) function. It also controls
the internal circuitry of JAM input to follow LOS/SD
selection.
Interfacing the Driver with the Laser Diode
As shown on the “Typical Application” drawing, MOD+
pin is AC coupled to the laser diode cathode through a
series resistor and MOD- is AC coupled to the laser
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SY88232L/AL
Loss-of-Signal-Level Set
A programmable LOS/SD level set pin (LOSLVL) sets the
threshold of the input amplitude detection. Connecting
an external resistor between VCC and LOSLVL sets the
voltage at LOSLVL. This voltage ranges from VCC to
VCC -1.3V. The external resistor creates a voltage divider
between VCC and VCC-1.3V, as shown in Figure 2c.
RSSI Pin
The post amplifier has an RSSI (Received Signal
Strength) pin, which provides a current proportional to
the amplitude of the signal at the input of the post
amplifier from the ROSA. Install a resistor between this
pin and GND to convert the current into a monitoring
voltage proportional to the amplitude of the signal at the
input of the post amplifier. The value of the resistor
should be selected to keep the voltage at the RSSI pin
under its limit of 1.2V to maintain RSSI linearity.
Hysteresis
The post amplifier provides typically 3dB LOS electrical
hysteresis, which is defined as 20log (VINLOS-Assert /
VINLOS-De-Assert). Since the relationship between the
voltage out of the ROSA to optical power at its input is
linear, the optical hysteresis will be typically half of the
electrical hysteresis reported in the datasheet, but in
practice the ratio between electrical and optical
hysteresis is found to be within the range 1.5 to 1.8.
Thus, 3dB electrical hysteresis will correspond to an
optical hysteresis within the range 1.6dB to 2dB.
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Micrel, Inc.
SY88232L/AL
Input and Output Stages (SY88232L)(1)
Figure 1a. Simplified Driver Input Stage
(1)
Figure 1b. Simplified TXDIS Input Stage
Figure 1d. Post Amplifier Input Stage
Figure 1c. Simplified Driver Output Stage
(1)
Figure 1e. Post Amplifier Output Stage
Note:
1.
Applies for SY88232L only. For SY88232AL input terminations need to be removed.
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Micrel, Inc.
SY88232L/AL
Interfacing DIN to Different Logic Drivers (SY88232L) (1)
Figure 2a. Driving DIN with PECL Outputs
(1)
(1)
Figure 2b. Driving DIN with CML Outputs
Figure 2d. LOS Output Structure
Figure 2c. LOSLVL Setting Circuit
Note:
1.
Applies for SY88232L only. For SY88232AL input terminations need to be added.
June 2009
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M9999-063009-A
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Micrel, Inc.
SY88232L/AL
Package Information
32-Pin (5mm x 5mm) QFN
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2009 Micrel, Incorporated.
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