SY88993AV_07 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 5V/3.3V 3.2Gbps HIGH-SPEED LIMITING POST AMPLIFIER SY88993AV

Micrel, Inc.
5V/3.3V 3.2Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
SY88993AV
SY88993AV
FEATURES
s > 3.2Gbps operation
s Low noise CML data outputs
s Chatter-Free LOS generation
s Open Collector TTL LOS output
s TTL /EN Input
s Differential PECL inputs for data
s Single 3.3V or 5V power supply
s Designed for use with SY88922V and SY88905
s Available in a tiny 10-pin (3mm) MSOP
APPLICATIONS
s 1.25Gbps and 2.1Gbps Gigabit Ethernet
s 531Mbps, 1062Mbps and 2.5Gbps SONET/SDH
Fibre Channel
s 622Mbps
s Gigabit interface converter (GBIC)
s Small form factor trancievers
s Parallel 10G Ethernet
DESCRIPTION
The SY88993AV limiting post amplifier with its high and
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 4mVp-p can be amplified to drive devices with
CML inputs or AC coupled PECL inputs. The SY88993AV
generates a chatter-free Loss of Signal (LOS) open collector
TTL output.
The SY88993AV incorporates a programmble 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 3.
SY88993AV
LOS
V_CC
4.7k to 10k
BLOCK DIAGRAM
D_IN
/D_IN
V_REF
V_CC
GND
Limiting
Amplifer
LOS_LVL
CML
Buffer
Enable
Level
Detect
D_OUT
/D_OUT
/EN
LOS
M9999-091207
[e-mail] or [phone]
1
Rev.: D Amendment: /0
Issue Date: September 2007