SY88993AL 데이터 시트보기 (PDF) - Micrel

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SY88993AL

3.3V 3.2Gbps High-Speed Limiting Post Amplifier with High Input Sensitivity

Micrel 

SY88993AL

3.3V 3.2Gbps High-Speed Limiting Post

Amplifier with High Input Sensitivity

General Description

The SY88993AL limiting post amplifier, with its wide

bandwidth, is ideal for use as a post amplifier in fiber-optic

receivers with data rates up to 3.2Gbps. Signals as small

as 4mVPP can be amplified to drive devices with CML

inputs or AC-coupled PECL inputs. The SY88993AL

generates a chatter-free Loss-of-Signal (LOS) open

collector TTL output using an external resistor, as shown

Figure 1.

The SY88993AL incorporates a programmable level detect

function to identify when the input signal has been lost.

This information can be fed back to the /EN input of the

device to maintain stability under loss of signal conditions.

Using LOSLVL pin the sensitivity of the level detect can be

adjusted. The LOSLVL voltage can be set by connecting a

resistor divider between VCC and VREF, Figure 5.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Features

• Up to 3.2Gbps operation

• Low noise CML data outputs

• Chatter-Free LOS generation

• Open Collector TTL LOS output

• TTL /EN Input

• Differential PECL inputs for data

• Single 3.3V power supply

• Available in a tiny 10-pin (3mm x 3mm) MSOP

Applications

• PON

• SFP/SFF/GBIC optical transceivers

• Gigabit Ethernet

• 1X and 2X Fibre Channel

• SONET/SDH: OC 3/12/24/48 – STM 1/4/8/16

• Line driver and line receiver

Markets

• FTTX

• Datacom/Telecom

Figure 1. LOSLVL resistor configuration

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

September 2008

M9999-093008-A

hbwhelp@micrel.com or (408) 955-1690

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