Overview

The GN2017 is an integrated highly-flexible bi-directional CDR, laser driver and limiting amplifier for 16G Fibre Channel, and FCoE SFP+ VCSEL based applications.

The GN2017 extends the reach and robustness of high-speed serial links by compensating for losses in the transmission medium and by resetting the jitter budget.

The transmit path consists of optional equalization, a multi-rate CDR and a VCSEL laser driver.

The receive path is comprised of a limiting amplifier, a multi-rate CDR, and programmable output pre-emphasis.

Both transmit and receive directions offer highly configurable eye shaping features, which allow for optimal electrical and optical outputs. Both directions also offer the option for polarity invert, loopback, output mute, and programmable output rise/fall times.

The GN2017 has an integrated analog to digital converter, which through the serial interface, provides digital diagnostic information on supply voltage, die temperature, laser bias current, and transmit optical power.

The GN2017 is configurable for multi-rate operation. Two configuration profiles optimized for different data rates can be programmed into the GN2017.

The GN2017 also offers integrated laser safety features.

The GN2017 device is packaged in a small outline 5mm × 5mm, 32-pin, high-frequency QFN package with exposed pad.

The GN2017 is Pb-free and the encapsulation compound does not contain halogenated flame retardant.

Packaging

32-QFN

Order Codes

GN2017-INE3

PB Free/ROHS

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Features

Dual CDRs with 9.95-11.3Gb/s and 14.025Gb/s reference-free operation
Integrated limiting amplifier with sensitivity less than 10mV
Integrated VCSEL driver
Automatic rate detect
On-chip Automatic Power Control (APC) loop
Digital control and monitoring
Integrated eye monitor
PRBS7 generator/checker
Bi-directional loopback
Polarity invert, output mute available in both transmit and receive direction
Optional transmit path input trace equalization
Programmable analog pre-emphasis for SFI output
Programmable VCSEL-driver Output Crossing-Point Adjust
VCSEL driver analog pre-emphasis: programmable boost amplitude and width
Programmable Tx Fault signalling (open-drain)
Integrated analog to digital converter, which provides access to digital diagnostic information on supply voltage, die temperature, laser bias current, and transmit optical power
I2C Serial Interface • Integrated laser safety features
Single 3.3V supply (+5%/-7%)
5x5 32-pin QFN package
-40°C to 95°C case operation
Single-ended or differential, AC-coupled bias sink/source VCSEL drive operation
Adjustable bias current from 1mA to 12mA
Adjustable modulation current from 2mA peak-to-peak to 15mA peak-to-peak, single-ended
Output: 2 x 50?single-ended terminations
Crossing point adjustment (20% to 80% of eye height)
Programmable analog pre-emphasis:
- peaking tail current range of 0 to 6mA in 32 steps
- peaking temporal range 0 to 100ps in 32 steps
Programmable rise/fall time; 20ps to 40ps
Optional on-chip APC loop
Programmable Tx Fault signalling