Microchip SY88813V Manual

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SY88813V

Micrel, Inc.

M9999-072505

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

3.3V/5V 155Mbps PECL LOW POWER

LIMITING POST AMPLIFIER WITH PECL

SIGNAL DETECT

SY88813V

Rev.: B Amendment: /0

Issue Date: July 2005

TYPICAL APPLICATIONS CIRCUIT

APPLICATIONS

■ 155Mbps SONET/SDH

■ Small form factor transceivers

■ High-gain line driver and line receiver

■ Single 3.3V or 5V power supply

■ Up to 155Mbps operation

■ Low noise PECL data outputs

■ Chatter-free PECL Signal Detect (SD) output

■ TTL /EN input

■ Programmable SD level set (SD

LVL

)

■ Available in a tiny 10-pin MSOP (3mm) package

FEATURES

DESCRIPTION

The SY88813V low power limiting post amplifier is

designed for use in fiber-optic receivers. The device connects

to typical transimpedance amplifiers (TIAs). The linear signal

output from TIAs can contain significant amounts of noise

and may vary in amplitude over time. The SY88813V

quantizes these signals and outputs PECL level waveforms.

The SY88813V operates from a single +3.3V or +5V

power supply, over temperatures ranging from –40°C to

+85°C. With its wide bandwidth and high gain, signals with

data rates up to 155Mbps and as small as 5mV

can be

amplified to drive devices with PECL inputs.

The SY88813V generates a PECL signal-detect output.

A programmable signal-detect level set pin (SD

LVL

) sets

the sensitivity of the input amplitude detection. SD asserts

high if the input amplitude rises above the threshold set by

LVL

and deasserts low otherwise. /EN deasserts the true

output signal without removing the input signal. Typically

4.6dB SD hysteresis is provided to prevent chattering.

/EN

GND GND

CDR

SY88813V

3kΩ

From

Transimpedance

Amp.

OUT

REF

LVL

0.1µF

50Ω

100Ω

For 3.3V, R

= 120Ω

For 5V, R

= 220Ω

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SY88813V

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