SY88913V Datasheet, PDF (1/7 Pages) Micrel Semiconductor – 5V/3.3V 1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER

Micrel, Inc.
5V/3.3V 1.25Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
SY88913V
SY88913V
FEATURES
s 3.3V and 5V power supply options
s Up to 1.5Gbps operation
s Low power
s Low noise
s Chatter-Free /LOS Generation
s PECL /LOS Output
s TTL /EN Input
s Differential PECL inputs for data
s /EN input is TTL with internal 27K pull up
s Single power supply
s Designed for use with Micrel-Synergy laser diode
driver and controller
s Available in a tiny 10-pin (3mm) MSOP
DESCRIPTION
The SY88913V limiting post amplifier with its high gain
and wide bandwidth is ideal for use as a post amplifier in
fiber-optic receivers with data rates up to 1.5Gbps.
Signals as small as 5mVp-p can be amplified to drive
devices with PECL inputs. The SY88913V generates a
chatter-free PECL Loss of Signal (/LOS) output.
The SY88913V 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 2. Figure 3 and 4 show the relationship between
input level sensitivity and the voltage set on LOS_LVL.
APPLICATIONS
s 1.25Gbps Gigabit Ethernet
s 531Mbps and 1062Mbps Fibre Channel
s 622Mbps SONET
s Gigabit Interface Converter
BLOCK DIAGRAM
D_IN
/D_IN
V_REF
V_CC
GND
Limiting
Amplifer
LOS_LVL
ECL
Buffer
Enable
D_OUT
/D_OUT
/EN
Level
Detect
LOS
M9999-081505
[e-mail] or [phone]
1
Rev.: C Amendment: /0
Issue Date: August 2005