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SY88432L 데이터시트 PDF




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부품번호 SY88432L 기능
기능 4.25 Gbps Transceiver
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SY88432L 데이터시트, 핀배열, 회로
SY88432L
4.25 Gbps Transceiver with Integrated FP/DFP Laser
Diode Driver and Limiting Post Amplifier
General Description
The SY88432L is a low power transceiver device that
integrates a 4.25Gbps FP/DFB laser diode driver with a
wide-sensitivity limiting post amplifier. This low power
device is designed for use in fiber-optic optical modules
for multi-rate applications up to 4.25Gbps.
The SY88432L transmitter section can output up to
60mA of modulation current with fast rise and fall times
and is designed to be AC-coupled to the laser. The
transmitter output stage incorporates a transmit disable
feature and integrated 50input impedance referenced
to VCC.
The receiver section’s limiting post amplifier connects to
a typical trans-impedance amplifier (TIA) to amplify the
incoming weak signal from the ROSA and outputs
normalized received data in CML format at the output.
The receiver offers a wide LOS (Loss Of Signal) Assert
range between 8mVPP to 40mVPP differential. A
programmable loss-of-signal level set pin (LOSLVL) sets
the sensitivity of the input amplitude detection. The LOS
or SD (signal-detect) is user selectable and the LOS/SD
signal can be fed back to the JAM input to implement
the SQUELCH function that maintains output stability
under a loss-of-signal condition. The receiver input
should be AC-coupled.
The SY88432L interfaces with Micrel’s highly advanced
optical module controller MIC3003 as an easy-to-use
chipset solution for CSFP/SFP/CSFF/SFF optical
module applications. The MIC3003 allows for both
modulation and bias current control, with automatic
power control (APC) and temperature compensation.
The SY88432L operates on a single 3.3V power supply
and is available in a 24 lead, 4x4mm QFN package.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Features
Multi-rate operation up to 4.25Gbps
Single, wide range power supply: 3.3V 10%
Industrial temp range: -40°C to +85°C
MIC3003 compatible
Transmitter FP/DFP Laser Diode Driver
Modulation current up to 60mA
- AC coupled laser diode modulation
- Voltage controlled modulation current
Rise/Fall times 65ps (typical)
TX Disable with internal 75kΩ pull down resistor
Integrated 50input impedance to VCC
Receiver Limiting Post Amplifier
Wide differential input range (10mVpp 1800mVpp)
Programmable LOS level (LOSLVL) sensitivity
Wide LOS Assert range (8mVpp 40mVpp)
- With 3.5dB typical electrical hysteresis
Selectable LOS or SD output
TTL compatible JAM input with internal pull up
Low-noise CML data outputs with integrated 50
termination impedance
- Rise/Fall times 60ps (typical)
Low-noise CML data inputs with integrated 50Ω
termination impedance to internal reference VREF
Applications
Gigabit Ethernet
Fibre Channel 1FC, 2FC, 4FC
SONET OC3/12/24/48 and with FEC
SDH STM1/4/8/16 and with FEC
Markets
Datacom / Telecom / Storage
Compact SFP/SFF Optical transceiver
SFP/SFF Optical transceiver
Wireless backhaul
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 http://www.micrel.com
July 2012
M9999-061312-A
[email protected] or (408) 955-1690




SY88432L pdf, 반도체, 판매, 대치품
Micrel, Inc.
SY88432L
Pin Description
Pin
Number
Pin Name
1 JAM
Type
Logic Level
Input
Pin Function
Active Low TTL Input. Determines whether the post amp output is enabled or disabled.
Operation when LOS/SD = LOS is selected:
HIGH = Post amp output is Disabled.
LOW = Post amp output is Enabled.
Operation when LOS/SD = SD is selected:
HIGH = Post amp output is Enabled.
LOW = Post amp output is Disabled.
Default: Internally pulled-up with 25kΩ.
Can be shorted to LOS/SD (pin 2) to create a SQUELCH function.
2
4, 5
8, 9
11
12
14, 15
19
21, 22
24
3, 6
LOS/SD
RXOUT-,
RXOUT+
TXIN+,
TXIN-
MODSET
TXDIS
MOD-,
MOD+
LOS/SD_S
RXIN+,
RXIN-
LOSLVL
VCC_R
Logic Level
Output
CML Outputs
CML Inputs
Analog Input
Logic Level
Input
Transmitter
Output
Logic Level
Input
Receiver Inputs
Analog Input
Receiver
Positive Supply
Rail
Loss-of-Signal / Signal-Detect. Determined by LOS/SD_S pin setting.
Operation when LOS is selected by LOS/SD_S pin setting:
HIGH = when the data input amplitude falls below the threshold set by LOSLVL.
LOW = when the data input amplitude rises above the threshold set by LOSLVL.
Operation when SD is selected by LOS/SD_S pin setting:
HIGH = when the data input amplitude rises above the threshold set by LOSLVL.
LOW = when the data input amplitude falls below the threshold set by LOSLVL.
Receiver Differential CML Outputs. Unused output should be terminated 50Ω to VCC.
Transmitter Differential Data CML Inputs. Data input signals for the laser diode driver
section internally terminated with 50Ω to VCC.
Modulation Current Setting and Control. The modulation current is set by applying a
voltage between 0V and 1.2V to this pin. 5kΩ input impedance.
Transmit Disable. Control signal that enables or disables the laser diode driver outputs.
HIGH = Transmitter outputs are set as follows: MOD+ = HIGH; MOD- = LOW
LOW = Transmitter outputs Enabled.
Default: Internally pulled down with a 75kΩ resistor.
Modulation current output. Must be AC coupled to the laser.
LOS/SD Output Select. Determines whether LOS or SD is selected.
HIGH = SD is selected on the LOS/SD output and JAM logic operation is: when JAM =
High Post amplifier output is Enabled.
LOW = LOS is selected on the LOS/SD output and JAM logic operation is: when JAM =
Low Post amplifier output is Enabled.
Default: Internally pulled up with a 25kΩ resistor.
Receiver Differential Data Inputs. Each input is internally terminated to VREF (VCC
1.3V) with 50Ω resistors. Inputs are AC-coupled.
Loss-of-Signal Level Set. A resistor from this pin to VCC sets the threshold for the data
input amplitude at which LOS/SD will be asserted.
Receiver Voltage Supply. Bypass with a 0.1uF || 0.01uF low ESR capacitor as close to
VCC_R pin as possible.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2012
M9999-060512-A
4 [email protected] or (408) 955-1690

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SY88432L 전자부품, 판매, 대치품
Micrel, Inc.
SY88432L
Limiting Amplifier Electrical Characteristics
VCC = 3.3V ±10%, TA = 40°C to +85°C. Typical values at VCC = 3.3V, TA = 25°C; RLoad = 50Ω to VCC;
Symbol Parameter
Condition
Min Typ Max Units
LOSLVL LOSLVL Voltage
Vcc-1.3
VCC
V
VOH RXOUT+, RXOUT- High Voltage
VCC-0.020 VCC-0.005
VCC
V
VOL RXOUT+, RXOUT- Low Voltage
VCC-0.475 VCC-0.400 VCC-0.350
V
Z0 Single-Ended Output Impedance
40 50 60 
ZI Single-Ended Input Impedance
40 50 60 
Output Rise/Fall Time
tr, tf (20% to 80%)
Note 1
60 120 ps
tJITTER
Deterministic
Random
Note 2
Note 3
10 ps
1 ps
VID_2.5G
Differential Input Voltage Swing
Note 7. See Fig #1.
10
1800
mVPP
VID_3.2G
Differential Input Voltage Swing
Note 7. See Fig #1.
10
1800
mVPP
VID_4.25G Differential Input Voltage Swing
Note 7. See Fig #1.
15
1800
mVPP
VOD Differential Output Voltage Swing Note 1
600 800 950 mVPP
TOFF
LOS Release Time
Note 6
2 10 s
TON
LOSAL
LOSDL
HYSL
LOSAM
LOSDM
HYSM
LOSAH
LOSDH
HYSH
LOS Assert Time
Low LOS Assert Level
Low LOS De-assert Level
Low LOS Hysteresis
Medium LOS Assert Level
Medium LOS De-assert Level
Medium LOS Hysteresis
High LOS Assert Level
High LOS De-assert Level
High LOS Hysteresis
Note 6
RLOSLVL = 15kΩ, Note 4
RLOSLVL = 15kΩ, Note 4
RLOSLVL = 15kΩ, Note 5
RLOSLVL = 5kΩ, Note 4
RLOSLVL = 5kΩ, Note 4
RLOSLVL = 5kΩ, Note 5
RLOSLVL = 100Ω, Note 4
RLOSLVL = 100Ω, Note 4
RLOSLVL = 100Ω, Note 5
2
12
2
34
2
2 10 s
8 mVPP
13 mVPP
3.5 6 dB
15 mVPP
24 33 mVPP
3.7 6 dB
40 mVPP
65 83 mVPP
4 6 dB
AV(Diff)
Differential Voltage Gain
38 dB
S21 Single-Ended Small-Signal Gain
26 32
dB
Notes:
1. Amplifier in limiting mode. Input is a 200MHz square wave.
2. Deterministic jitter measured using 4.25Gbps K28.5 pattern, VID = 60mVPP.
3. Random jitter measured using 4.25Gbps K28.7 pattern, VID = 60mVPP.
4. See “Typical Operating Characteristics” for a graph showing how to choose a particular RLOSLVL for a particular LOS assert and its associated
de-assert amplitude.
5. 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 2dB-6 dB, shown in the AC characteristics table, will be 1dB-3dB
Optical Hysteresis.
6. 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).
7. Input swing required to achieve 30% mask margin with PRBS 27 pattern at specified data rate. See Fig #1 for differential and single-ended
swing definitions.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July 2012
M9999-060512-A
7 [email protected] or (408) 955-1690

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관련 데이터시트

부품번호상세설명 및 기능제조사
SY88432L

4.25 Gbps Transceiver

Micrel Semiconductor
Micrel Semiconductor

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