SY88232AL MICREL [Micrel Semiconductor], SY88232AL Datasheet

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SY88232AL

Manufacturer Part Number
SY88232AL
Description
2.5Gbps Laser Diode Driver with Integrated Limiting Amplifier
Manufacturer
MICREL [Micrel Semiconductor]
Datasheet
General Description
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 high-
current operation with the laser DC-coupled to it. The post
amplifier can detect signals with amplitude as low as
5mV
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.
___________________________________________________________________________________________________________
Typical Application
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
∑ Integrated APC circuit
∑ Modulation current up to 85mA
∑ Bias current up to 70mA
∑ 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
2.5Gbps Laser Diode Driver with Integrated
G-PON, E-PON, GE-PON
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Limiting Amplifier
SY88232L/AL
hbwhelp@micrel.com
®
or (408) 955-1690
M9999-063009-A
package
PP

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SY88232AL Summary of contents

Page 1

... PP The SY88232AL is a version of the SY88232L without 50Ω termination resistors at the inputs of the driver and the post amplifier. The SY88232AL used specially in SFF modules mounted on mother boards which have preinstalled terminations. Removing post amplifier input terminations will allow for receiver gain control. ...

Page 2

... Micrel, Inc. (1) Ordering Information Part Number Voltage SY88232LMG 3.3V (2) SY88232LMGTR 3.3V SY88232ALMG 3.3V (2) SY88232ALMGTR 3.3V Notes: 1. Contact factory for die availability. Dice are guaranteed Tape and Reel. June 2009 Temperature Package Range Type –40° to +85°C MLF-32 –40° to +85°C MLF-32 –40° to +85°C MLF-32 – ...

Page 3

... SY88232AL: Driver Non-inverting input data. No internal termination. SY88232L: Driver inverting input data. Internally terminated with 50Ω reference voltage. SY88232AL: Driver inverting input data. No internal termination. 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 ...

Page 4

... Indicates APC failure when High. Active High TTL/CMOS. Use a 10kΩ Pull up. SY88232L: Post amplifier Non-inverting input data. Internally terminated with 50Ω reference voltage. SY88232AL: Post amplifier Non-inverting input data. No internal termination. SY88232L: Driver inverting input data. Internally terminated with 50Ω reference voltage. SY88232AL: Driver inverting input data. No internal termination. ...

Page 5

Micrel, Inc. Truth Tables DIN+ DIN- /TXEN MOD Table 1. Modulation Output Truth Table /TXEN Table 2. BIAS Output Truth Table Notes: 1. Assuming /TXDIS = ...

Page 6

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) ........................................–0.5V to +4.0V IN CML Input Voltage (V ) ......................V IN TTL Control Input Voltage (V )................................ Lead Temperature (soldering, 20sec.) .......................+260°C Storage Temperature (T ) ........................... –65°C ...

Page 7

Micrel, Inc. Post Amplifier Symbol Parameter LOS LOS Voltage LVL LVL V ROUT+, ROUT- HIGH Voltage OH V ROUT+, ROUT- LOW Voltage OL V Maximum voltage at RSSI pin RSSI V Differential Output Offset OFFSET Z (ROUT) Single-Ended Output 0 ...

Page 8

Micrel, Inc. AC Electrical Characteristics T = –40°C to +85°C and V = +3.0V to +3.6V, unless otherwise noted. Typical values are 30mA 30mA. BIAS Symbol Parameter Laser Driver Data Rate V Differential Input Voltage ...

Page 9

Micrel, Inc. Post Amplifier Symbol Parameter Output Rise/Fall Time r f (20% to 80%) t Deterministic JITTER Random V Differential Input Voltage Swing Diff_IN (RIN) V Differential Output Voltage Diff_OUT (ROUT) Swing G RSSI Gain = I ...

Page 10

Micrel, Inc. Typical Characteristics Laser Driver I vs. I BIAS BIASMAXSET 100 100 150 200 250 300 350 400 450 500 I (mA) BIASMAXSET Modulation Gain 100 90 ...

Page 11

Micrel, Inc. Functional Characteristics Laser Driver June 2009 11 hbwhelp@micrel.com SY88232L/AL M9999-063009-A or (408) 955-1690 ...

Page 12

Micrel, Inc. Functional Characteristics (continued) Post Amplifier June 2009 12 hbwhelp@micrel.com SY88232L/AL M9999-063009-A or (408) 955-1690 ...

Page 13

... Micrel, Inc. Functional Diagram The SY88232L is shown. For the SY88232AL, 50Ω terminations should be removed from DIN± and RIN±. June 2009 13 hbwhelp@micrel.com SY88232L/AL M9999-063009-A or (408) 955-1690 ...

Page 14

Micrel, Inc. 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. BIAS ...

Page 15

Micrel, Inc. Loss-of-Signal-Level Set A programmable LOS/SD level set pin (LOS threshold of the input amplitude detection. Connecting an external resistor between V CC voltage at LOS . This voltage ranges from V LVL V -1.3V. The external resistor creates ...

Page 16

... Input and Output Stages (SY88232L) Figure 1a. Simplified Driver Input Stage Figure 1c. Simplified Driver Output Stage Figure 1e. Post Amplifier Output Stage Note: 1. Applies for SY88232L only. For SY88232AL input terminations need to be removed. June 2009 (1) (1) Figure 1b. Simplified TXDIS Input Stage Figure 1d. Post Amplifier Input Stage ...

Page 17

... Interfacing DIN to Different Logic Drivers (SY88232L) Figure 2a. Driving DIN with PECL Outputs Figure 2c. LOSLVL Setting Circuit Note: 1. Applies for SY88232L only. For SY88232AL input terminations need to be added. June 2009 (1) (1) Figure 2b. Driving DIN with CML Outputs Figure 2d. LOS Output Structure ...

Page 18

Micrel, Inc. Package Information 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. ...

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