FEATURES
· Multi-Rate Operation from 155 Mbps up to
4.25 Gbps
· 89 mW Power Consumption
· Input Offset Cancellation
· High Input Dynamic Range
· Output Disable
· CML Data Outputs
· Receive Signal Strength Indicator (RSSI)
· Loss of Signal Detection
· Polarity Select
· Single 3.3-V Supply
· Surface Mount Small Footprint 3-mm ´ 3-mm
16-Pin QFN Package
· Pin-Compatible with the ONET2501PA and
ONET3301PA

APPLICATIONS
· Multi-Rate OC3 to OC-48 FEC SONET/SDH
Transmission Systems
· 1.0625 Gbps, 2.125 Gbps, and 4.25 Gbps Fibre
Channel Receivers
· Gigabit Ethernet Receivers

DESCRIPTION
The ONET4201PA is a versatile high-speed, 3.3-V
limiting amplifier for multiple fiber optic applications
with data rates up to 4.25 Gbps.
This device provides a gain of about 50 dB, which
ensures a fully differential output swing for input
signals as low as 3 mVp-p.
The high input signal dynamic range ensures low
jitter output signals even when overdriven with input
signal swings as high as 1200 mVp-p.
The ONET4201PA provides a loss of signal detection
as well as a received signal strength indicator.
The part is available in a small footprint 3-mm ´
3-mm 16-pin QFN package and is pin-compatible with
the ONET2501PA and ONET3301PA.
This power efficient limiting amplifier typically
dissipates less than 89 mW and it is characterized for
operation from –40°C to 85°C.