SY88993AL Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 3.3V 3.2Gbps High-Speed Limiting Post Amplifier with High Input Sensitivity

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 4mV_PP 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 LOS_LVL pin the sensitivity of the level detect can be
adjusted. The LOS_LVL voltage can be set by connecting a
resistor divider between V_CC and V_REF, 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. LOS_LVL resistor configuration
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
September 2008
M9999-093008-A
[e-mail] or [phone]