2.97V to +5.5V, 125Mbps to 200Mbps Limiting Amplifier with Loss-of-Signal Detector

The MAX3645 limiting amplifier functions as a data quantizer and is pin compatible with the Mindspeed MC2045-2 and MC2045-2Y postamplifiers. The amplifier accepts a wide range of input voltages and provides constant-level positive emitter-coupled logic (PECL) output voltages with controlled edge speeds.

The MAX3645 features an integrated power detector with complementary PECL loss-of-signal (LOS) outputs that indicate when the input power level drops below a programmable threshold. An optional squelch function holds the data outputs at static levels during a LOS condition.

The MAX3645 operates from a single +3.3V or +5.0V power supply over a -40°C to +85°C temperature range. It is available in 16-pin SO and 16-pin QSOP packages.

Applications

* ESCON Receivers * Fast Ethernet Receivers * FDDI 125Mbps Receivers * FTTx Receivers * SONET 155Mbps Transceivers

* Pin Compatible with the Mindspeed MC2045-2/MC2045-2Y

* 500µV Input Sensitivity (BER = 10-12)

* Compatible with 4B/5B Data Coding

* Programmable LOS Threshold

* Stable LOS Threshold Over Supply Range

* Output Disable Function and Automatic Squelch

* Single +3.3V or +5.0V Power Supply

* 18mA Supply Current