Microchip SY88073L Handleiding

Bekijk gratis de handleiding van Microchip SY88073L (15 pagina’s), behorend tot de categorie Niet gecategoriseerd. Deze gids werd als nuttig beoordeeld door 5 mensen en kreeg gemiddeld 4.3 sterren uit 4 reviews. Heb je een vraag over Microchip SY88073L of wil je andere gebruikers van dit product iets vragen? Stel een vraag

SY88073L

1G to 12.5G Limiting Post Amplifier with

Programmable Decision Threshold

Revision1.0

.

Micrel Inc. • 2180 Fortune Drive • SanJose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

November

8, 2013

Revision 1.0

HBWhelp@micrel.com or (408) 955-1690

General Description

The SY88073Llimiting post amplifier is designed for use in

fiber-optic receivers for continuous mode, multi-rate

applications from 1Gbps to 12.5Gbps.

The SY88073Lcontains a high-bandwidth, high-sensitivity

input stage with user-programmable,wide-range SD

assert/LOS de-assert threshold levels, which enables

optimized system reach. Typically, 4dB of electrical

hysteresis is provided to minimize LOS or SD chattering

caused bynoisy input signals. A logic level control pin is

provided to enableuser selection of an open-collector,

TTL-compatible LOS or SD status indication signal with an

external 5kΩto 10kΩpull-up resistor.

The SY88073Lprovides fasterSD assert and LOS de-

assert times (than typical continuous mode devices) over

the entire differential input voltage range of 10mV

PP

to

1800mV

PP

.

The SY88073Linput stage also provides a user-adjustable

decision threshold circuit to optimize BER in noisy

applications such as WDM, where EDFA and Raman

amplifiers contribute uneven noise levels. By applying an

external control voltage, the decision threshold can

typically be adjusted from 30% to 70% from the nominal

50% threshold when the circuit is disabled.

The SY88073Lprovides integrated 50Ωinput and output

impedances to optimize the high-speed signal paths and

reduce component count. The post amplifier outputs have

user-selectable polarity inversion control to simplify PCB

layout. A TTL-compatible JAM input is provided to enable

a SQUELCH function by feeding back the LOS or SD

signal. The JAM input disables only the post amplifier

output.

The SY88073Loperates from a single +3.3V power

supply, over temperatures ranging from –40°C to +85°C.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com

.

Features

•Multi-rate operation from 1.0625Gbps to 12.5Gbps

•Adjustable decision threshold level for offset

compensation orBER optimization

•Wide differential input range (10mV

PP

to 1800mV

PP

)

•Wide SD de-assert or LOS assert threshold range

−4.5mV

PP

to 30mV

PP

−4dB typical electrical hysteresis

•Fast SD assert and LOS de-assert times

−1µs typical; 2µs maximum

•Selectable LOS or SD status signal indicator

•Selectable RXOUT+/RXOUT−polarity inversion

•TTL-compatible JAM input with internal pull-up

•Low-noise CML data inputs with integrated 50Ω

termination impedance to internal reference V

REF

•Low-noise CML data outputs with integrated 50Ω

termination impedance

−30ps typical rise/fall times

•Wide range power supply: 3.3V ±10%

•Industrial temperature range: −40°C to +85°C

•Available in a tiny 3mm x 3mm QFN package

Applications

•10G/8G Fibre Channel

•10Gigabit Ethernet

•OTN Equipment

•SONET OC192; SDH STM64

•WDM/DWDM systems

Markets

•Fibre Channel Storage Area Networks

•Datacom/Enterprise

•High-performance computing

•Telecom

•Wireless Base Stations

Product specificaties