sy88236l Micrel Semiconductor, sy88236l Datasheet

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sy88236l

Manufacturer Part Number
sy88236l
Description
Sy88236l/al 2.5gbps Burst Mode Laser Driver With Integrated Limiting Amplifier
Manufacturer
Micrel Semiconductor
Datasheet
The SY88236L is a single supply 3.3V integrated burst
mode laser driver and post amplifier for A-PON, B-PON,
EPON, GE-PON, and G-PON 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 high-current
operation with the laser DC-coupled to it. The post
amplifier can detect signals with amplitude as low as
5mV
The SY88236AL is a version of the SY88236L without 50Ω
termination resistors at the inputs of the driver and the post
amplifier. The SY88236AL is to be used specially in SFF
modules mounted on ONU 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.
___________________________________________________________________________________________________________
Typical Application
General Description
MLF and MicroLeadFrame are registered trademarks of Amkor Technology
June 2009
PP
.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
Features
∑ 2.4V minimum laser compliance voltage
∑ Operation up to 2.5Gbps
∑ Fast burst mode enable/disable delay
∑ Modulation current up to 85mA
∑ Bias current up to 70mA
∑ Infinite bias current hold time between bursts
∑ Bias, Modulation, and power monitoring
∑ High input sensitivity post amplifier, 5mV
∑ Programmable LOS level
∑ Available in 32-pin (5mm x 5mm) MLF
Applications
∑ Multi-rate burst mode applications: A-PON, B-PON,
408
G-PON, E-PON, GE-PON
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
2.5Gbps Burst Mode Laser Driver with
Integrated Limiting Amplifier
SY88236L/AL
hbwhelp@micrel.com
®
or (408) 955-1690
M9999-063009-A
package
PP

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sy88236l Summary of contents

Page 1

... PP The SY88236AL is a version of the SY88236L without 50Ω termination resistors at the inputs of the driver and the post amplifier. The SY88236AL used specially in SFF modules mounted on ONU 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’ ...

Page 2

... MLF-32 = +25°C, DC Electricals only SY88236L/AL Package Marking Lead Finish SY88236L with NiPdAu Pb-Free bar-line indicator Pb-Free SY88236L with NiPdAu Pb-Free bar-line indicator Pb-Free SY88236A with NiPdAu Pb-Free bar-line indicator Pb-Free SY88236A with NiPdAu Pb-Free bar-line indicator Pb-Free M9999-063009-A hbwhelp@micrel ...

Page 3

... SY88236L: Driver Non-inverting input data. Internally terminated with 50Ω reference voltage. SY88236AL: Driver Non-inverting input data. No internal termination. SY88236L: Driver inverting input data. Internally terminated with 50Ω reference voltage. SY88236AL: Driver inverting input data. No internal termination. Non-Inverting burst enable. Accepts any input, single-ended or differential: TTL/CMOS, LVPECL, CML, LVDS, and HSTL ...

Page 4

... 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 Low. Active Low TTL/CMOS. SY88236L: Post amplifier Non-inverting input data. Internally terminated with 50Ω reference voltage. SY88236AL: Post amplifier Non-inverting input data. No internal termination. ...

Page 5

... June 2009 (2) MOD- Laser Output (3) Power (1, 3) BEN- BIAS OFF X OFF 5 LOS/SD_SEL Function JAM Selected H LOS L H LOS Table 3. Post Amp Output Truth Table hbwhelp@micrel.com SY88236L/AL Output Enabled Disabled Disabled Enabled M9999-063009-A or (408) 955-1690 ...

Page 6

... Minimum Voltage Required at BIAS_MIN the Driver Output, BIAS pin, for Proper Operation I Bias-ON Current BIAS I Bias-OFF Current BIAS_OFF R Input Resistance at DIN+ and IN (SY88236L only) DIN- BEN+, BEN- Burst Mode Enable Signal V (BEN) High Voltage IH V (BEN) Low Voltage IL V /APCFAULT Output Low ...

Page 7

... LVL V ROUT+, ROUT- HIGH Voltage OH V ROUT+, ROUT- LOW Voltage OL V Differential Output Offset OFFSET Z (ROUT) Single-Ended Output 0 Impedance Z (RIN) Single-Ended Input Impedance I (SY88236L only) V (LOS/SD) LOS/SD Output Low OL I (LOS/SD) LOS/SD Output Leakage OH June 2009 Condition 2mA ...

Page 8

... Power up with TXDIS low and BEN+ high TXDIS changes from high to low with power ON and BEN+ high BEN changes from low to high with power ON and TXDIS low (8,10) 155Mbps 622Mbps 1.25Gbps 2.5Gbps 155Mbps 622Mbps 1.25Gbps 2.5Gbps 8 SY88236L/AL = +3.3V 25° MOD Min Typ Max Units 0.155 2.5 Gbps 100 ...

Page 9

... PP = 10mV . Min Typ 700 800 ± 2 1.5 2 1.5 2 1 hbwhelp@micrel.com SY88236L/AL Max Units ps 120 RMS mV PP 1800 mV PP 950 µ µ ...

Page 10

... R (kW) MODSET LOSA and LOSD vs. R 100 10 1 200 100 1000 10000 R (W) LOSLVL 10 I BIASMON 0.05 0.04 0.03 0.02 0.01 0. 100 BIAS 25 30 LOSLVL 100000 M9999-063009-A hbwhelp@micrel.com or (408) 955-1690 SY88236L/AL Gain (mA) ...

Page 11

... Micrel, Inc. Functional Characteristics Laser Driver June 2009 11 hbwhelp@micrel.com SY88236L/AL M9999-063009-A or (408) 955-1690 ...

Page 12

... Micrel, Inc. June 2009 12 hbwhelp@micrel.com SY88236L/AL M9999-063009-A or (408) 955-1690 ...

Page 13

... Micrel, Inc. Functional Characteristics (continued) Post Amplifier June 2009 13 hbwhelp@micrel.com SY88236L/AL M9999-063009-A or (408) 955-1690 ...

Page 14

... Micrel, Inc. Functional Diagram The SY88236L is shown. For the SY88236AL, 50Ω terminations should be removed from DIN± and RIN±. June 2009 14 hbwhelp@micrel.com SY88236L/AL M9999-063009-A or (408) 955-1690 ...

Page 15

... SD (set to low) function. It also controls the internal circuitry of JAM input to follow LOS/SD selection reduce the noise at the output of the detected and amplified Small input signals below typically 12mV PP PP M9999-063009-A hbwhelp@micrel.com or (408) 955-1690 SY88236L/ JAM LVL PP , the ...

Page 16

... 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 limits of 1.2V to maintain RSSI linearity. / LOS-Assert 16 SY88236L/AL M9999-063009-A hbwhelp@micrel.com or (408) 955-1690 ...

Page 17

... Input and Output Stages (SY88236L) Figure 1a. Simplified Driver Input Stage Figure 1c. Simplified Driver Output Stage Figure 1e. Post Amplifier Output Stage Note: 1. Applies for SY88236L only. For SY88236AL input terminations need to be removed. June 2009 (1) (1) Figure 1b. Simplified BEN Input Stage Figure 1d. Post Amplifier Input Stage ...

Page 18

... Figure 2c. Driving BEN with LVTTL/CMOS Outputs Figure 2e. Driving BEN with Single-Ended LVTTL/CMOS Figure 2g. LOS Output Structure Note: 1. Applies for SY88236L only. For SY88236AL input terminations need to be added. June 2009 (1) Figure 2b. Driving DIN and BEN with CML Outputs (1) Figure 2d. Driving BEN with LVDS Outputs Figure 2f ...

Page 19

... 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 June 2009 32-Pin (5mm x 5mm) MLF indemnify Micrel for any damages resulting from such use or sale. © 2009 Micrel, Incorporated. 19 ® (MLF-32) hbwhelp@micrel.com SY88236L/AL M9999-063009-A or (408) 955-1690 ...

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