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12x10 Gb/s VCSEL Driver
Single +3.3V supply dissipating 142
mW per channel
Serial digital interface for global and
individual channel control
Individual channel control for enable,
modulation and bias current
On-chip adjustable VCSEL
temperature compensation
Adjustable output current waveform
for VCSEL jitter reduction
Analog control input for closed-loop
optical power optimization
VCSEL open/short detection with
autonomous fault handling
250-micron channel pitch matches
optical ribbon fiber and array VCSELs
Differential CML inputs with on-chip
termination
Description
The growing use of the Internet has created
increasingly higher demand for multi-Gb/s I/O
performance. The demand for 1 Tb/s+ WAN
bandwidth fuels the growth of short-reach 120
Gb/s infrastructures within high-end telco and
datacom routers, switches, servers and other
proprietary chassis-to-chassis links.
The Zarlink PX6419 12X10 Gb/s VCSEL Driver*
is a 12-channel VCSEL driver designed for
various 12x10 Gb/s, 120 Gb/s parallel optics and
CWDM PMD applications. It consists of a DC-
coupled amplifier with selectable modulation and
bias currents optimized for driving commercially
available, common cathode VCSELs from a
single +3.3 V supply.
Individual channel settings are used to control the
modulation and bias current and their
temperature coefficients, allowing the optical
output power and extinction ratio to be optimized.
Data controlling the Zarlink PX6419 VCSEL
Driver settings is loaded by a simple four-wire
CMOS serial interface that features read/write
and daisy chain capabilities.
Applications
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Proprietary 120 Gb/s intra-system
parallel optics
Proprietary 12-lane optical modules
and CWDM
10GbE, 10GFC, OC-192 VSR parallel
optics
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Zarlink Semiconductor Inc.
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