SY88813V Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 3.3V/5V 155Mbps PECL LOW POWER LIMITING POST AMPLIFIER WITH PECL SIGNAL DETECT

Micrel, Inc.
3.3V/5V 155Mbps PECL LOW POWER
LIMITING POST AMPLIFIER WITH PECL
SIGNAL DETECT
SY88813V
SY88813V
FEATURES
s Single 3.3V or 5V power supply
s Up to 155Mbps operation
s Low noise PECL data outputs
s Chatter-free PECL Signal Detect (SD) output
s TTL /EN input
s Programmable SD level set (SD_LVL)
s Available in a tiny 10-pin MSOP (3mm) package
APPLICATIONS
s 155Mbps SONET/SDH
s Small form factor transceivers
s High-gain line driver and line receiver
DESCRIPTION
The SY88813V low power limiting post amplifier is
designed for use in fiber-optic receivers. The device connects
to typical transimpedance amplifiers (TIAs). The linear signal
output from TIAs can contain significant amounts of noise
and may vary in amplitude over time. The SY88813V
quantizes these signals and outputs PECL level waveforms.
The SY88813V operates from a single +3.3V or +5V
power supply, over temperatures ranging from –40°C to
+85°C. With its wide bandwidth and high gain, signals with
data rates up to 155Mbps and as small as 5mV_PP can be
amplified to drive devices with PECL inputs.
The SY88813V generates a PECL signal-detect output.
A programmable signal-detect level set pin (SD_LVL) sets
the sensitivity of the input amplitude detection. SD asserts
high if the input amplitude rises above the threshold set by
SD_LVL and deasserts low otherwise. /EN deasserts the true
output signal without removing the input signal. Typically
4.6dB SD hysteresis is provided to prevent chattering.
TYPICAL APPLICATIONS CIRCUIT
From
Transimpedance
Amp.
0.1µF
0.1µF
R_pd
SD
D_IN
/D_IN
V_CC
/EN
SY88813V
D_OUT
/D_OUT
0.1µF
0.1µF
50Ω
50Ω
GND
SD_LVL V_REF
R_pd
R_pd
V_CC
100Ω 3kΩ
GND
For 3.3V, R_pd = 120Ω
For 5V, R_pd = 220Ω
To
CDR
M9999-072505
[e-mail] or [phone]
1
Rev.: B Amendment: /0
Issue Date: July 2005