SY88289BL
3.3V, 3.2Gbps CML Limiting Post Amplifier
with High-Gain TTL Loss-of-Signal
General Description
The SY88289BL 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 SY88289BL quantizes these signals and
outputs CML level waveforms.
The SY88289BL operates from a single +3.3V power
supply, over temperatures ranging from 鈥?0
o
C to +85
o
C.
With its wide bandwidth, high gain, and signals with data
rates up to 3.2Gbps and as small as 5mV
PP
can be
amplified to drive devices with CML inputs or AC-
coupled CML/PECL inputs.
The SY88289BL generates a high-gain loss-of-signal
(LOS) open-collector TTL output. This function has a
high-gain input stage for increased LOS sensitivity. A
programmable loss-of-signal level set pin (LOS
LVL
) sets
the sensitivity of the input amplitude detection. LOS
asserts high if the input amplitude falls below the
threshold set by LOS
LVL
and de-asserts low otherwise.
The enable bar input (/EN) de-asserts the true output
signal without removing the input signal. The LOS
output can be fed back to the /EN input to maintain
output stability under a loss-of-signal condition. Typically
3.5dB LOS hysteresis is provided to prevent chattering.
All support documentation cab be found on Micrel鈥檚 web
site at:
www.micrel.com.
Features
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Single 3.3V power supply
DC to 3.2Gbps operation
Low-noise CML data outputs
High-gain LOS
Chatter-free open-collector TTL signal detect (LOS)
output with internal 4.75k鈩?pull-up resistor
TTL /EN input
Programmable LOS level set (LOS
LVL
)
Ideal for mutil-rate applications
Available in a tiny 16-pin MLF
廬
package
APON, BPON, EPON, and gpon
Gigabit Ethernet
Fibre Channel
OC-3 and OC-12/24 SONET/SDH
High-gain line driver and line receiver
FTTP
Optical transceivers
Datacom/telecom
Low-gain TIA interface
Long reach FOM
Applications
Markets
Typical Application
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology.
Micrel Inc. 鈥?2180 Fortune Drive 鈥?San Jose, CA 95131 鈥?USA 鈥?tel +1 (408) 944-0800 鈥?fax + 1 (408) 474-1000 鈥?http://www.micrel.com
February 2007
M9999-021207-B
hbwhelp@micrel.com
or (408) 955-1690
SY88289BLMGTR相關(guān)型號(hào)PDF文件下載
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