SY88713V Datasheet, PDF (1/8 Pages) Micrel Semiconductor – 3.3V/5V 622 Mbps PECL LOW-POWER LIMITING POST AMPLIFIER W/PECL SIGNAL DETECT

Micrel, Inc.
3.3V/5V 622Mbps PECL LOW-POWER
LIMITING POST AMPLIFIER W/PECL
SIGNAL DETECT
SY88713V
SY88713V
FEATURES
s Single 3.3V or 5V power supply
s Up to 622Mbps 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 622Mbps SONET/SDH
s Small form factor transceivers
s High-gain line driver and line receiver
DESCRIPTION
The SY88713V 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 SY88713V
quantizes these signals and outputs PECL level waveforms.
The SY88713V 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 622Mbps and as small as 5mVp-p can be
amplified to drive devices with PECL inputs.
The SY88713V generates a PECL SD 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.
120Ω
SD
0.1µF
D_IN
0.1µF
/D_IN
V_CC
/EN
SY88713V
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