SY84403BL Datasheet, PDF (1/10 Pages) Micrel Semiconductor – Ultra Small 3.3V 4.25Gbps CML Low-Power Limiting Post Amplifier with TTL LOS

SY84403BL
Ultra Small 3.3V 4.25Gbps CML Low-Power
Limiting Post Amplifier with TTL LOS
General Description
The SY84403BL is the industry’s smallest limiting post
amplifier ideal for compact copper and fiber optic
module applications. 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
SY84403BL quantizes these signals and outputs
typically 800mV_PP voltage-limited waveforms.
The SY84403BL comes in a tiny 10-pin 2x2 MLF^®
package, which is unparalleled in the industry. It offers
space savings of 55% or more over typical post amps.
It operates from a single +3.3V ±10% power supply,
over an industrial temperature range of –40°C to
+85°C. With its wide bandwidth and high gain, signals
with data rates up to 4.25Gbps and as small as
10mV_PP can be amplified to drive devices with CML
inputs or AC-coupled PECL inputs.
The SY84403BL incorporates a loss-of-signal (LOS)
open-collector TTL output with internal 4.75kΩ pull-up
resistor. A programmable loss-of-signal level set pin
(LOSLVL) sets the sensitivity of the input amplitude
detection. LOS asserts high if the input amplitude falls
below the threshold set by LOSLVL and de-asserts
low otherwise. LOS can be fed back to the enable bar
(/EN) input to maintain output stability under a loss of
signal condition. /EN de-asserts the true output signal
without removing the input signal.
All support documentation can be found on Micrel’s
web site at: www.micrel.com.
Typical Performance
Features
• Available in an ultra small 10-pin (2mm x 2mm)
MLF^® package
• Multi-rate up to 4.25Gbps operation
• 10mV_PP input sensitivity
• Low noise 50Ω CML data outputs
– 800mV_PP differential output swing
– 60ps edge rates
– 1ps_RMS typ. random jitter
– 10ps_PP typ. deterministic jitter
• Chatter-free Loss-of-Signal (LOS) output
– 3.5dB electrical hysteresis
– OC-TTL output with internal 4.75kΩ pull-up
resistor
• Programmable LOS sensitivity using single
external resistor
• Internal 50Ω data input termination
• TTL /EN input allows feedback from LOS
• Wide operating range:
– Single 3.3V ±10% power supply
– Industrial temperature range: –40°C to +85°C
• Part of Micrel’s new ultra small FOM IC family. For
Laser Diode Drivers, see SY84202L or SY84402L
Applications
• 1.062Gbps, 2.125Gbps and 4.25Gbps Fibre
Channel
• Cable driver
• SFF and SFP transceivers
• High-gain line driver and line receiver
Markets
• Copper interconnect
• Datacom and telecom
• Storage area network (SAN)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
May 2009
M9999-051509-A
[e-mail] or [phone]