Semtech GN7152
Multi-Rate CDR with EML Driver
The GN7152 is an integrated CDR and EML laser driver for PON OLT, 10GBase-ER/ZR Ethernet and 8.5Gb/s
Fibre Channel applications. It is a highly-integrated, low-power, small-footprint device, that is ideal for small
form factor optical modules.
The GN7152 includes optional input equalization, a multi-rate CDR and an EML laser driver. The GN7152 offers
a highly-configurable eye shaping feature, including independently programmable rise and fall pre-emphasis,
which allows for an optimal electrical and optical output. The GN7152 also offers the option for polarity-invert
and output mute.
Features
CDR with 8.5Gb/s, 9.95 to 11.3Gb/s,
and 10.3 to 11.7Gb/s reference-free operation
Integrated laser bias and driver for electo-absorption
modulators (EAMs) and modulated lasers (EMLs)
Differential input amplitudes as small as 120mVppd
Digital control through I2C or SPI interface
Programmable jitter transfer bandwidth
On-chip Automatic Power Control (APC) loop
Polarity invert and output mute available
Programmable output pre-emphasis
Mission-mode eye monitor
PRBS Generator and Checker
Programmable input equalization
Programmable LOS with adjustable threshold and
hysteresis
Programmable sampling phase adjust
Programmable fault signalling
Integrated analog to digital converter, which provides
access to digital diagnostic information on supply
voltage, die temperature, and transmit optical power
Single 3.3V supply (+5%/-10%)
Power dissipation:
730mW typical, with 1.9Vpp single-ended
modulation voltage and 90mA bias current
Integrated laser safety features
5x5 32-pin QFN package
-40°C to 95°C case operation
Applications
PON OLT transceivers
XFP & SFP+ 10GBase-ER/ZR optical transceivers
XFP & SFP+ extended-reach 8.5 Gb/s Fibre Channel
