MAX3270 Datasheet | Maxim Integrated

Description The MAX3270 is a plete Clock Recovery and Data Retiming IC for 155Mbps and 622Mbps SDH/SONET and ATM applications. The MAX3270 meets Bellcore and CCITT jitter tolerance specifications ensuring errorfree data recovery. Recovered clock and data are phase aligned using a fully integrated phase-locked loop (PLL). An output frequency monitor (FM) is included to detect loss of PLL acquisition or a loss of input data. The MAX3270 has differential ECL input and output interfaces, so it is less susceptible to noise in a highfrequency environment. The fully integrated PLL includes an integrated phase-frequency detector that eliminates the need for external references. ________________________Applications 155Mbps (STM-1/OC-3)/622Mbps (STM-4/ OC-12) SDH/SONET Transmission Systems 155Mbps/622Mbps ATM/SONET Access Nodes Add/Drop Multiplexers Cross-Connects ____________________________Features o Supports Both 155Mbps and 622Mbps Clock Recovery and Data Retiming o Fully Integrated Phase/Frequency Detector o Capable of Switching to an External Clock o Differential 100K ECL Data and Clock I/Os o Output Monitor Provides Lock Detection o No External Reference Clock Required PART MAX3270EMH Ordering Information TEMP. RANGE -40°C to +85°C PIN-PACKAGE 44 MQFP Pin Configuration appears at end of data sheet. ____________________________________________________Typical Operating Circuit -2V +5V 11 39 17 19 38 7 16 15 5 24 27 29 32 50Ω 50Ω 50Ω 50Ω 3 SDIP 50Ω -2V 50Ω -2V +5V 4 SDIN 41 PHADJ 42 VR 13 EXCS 18 CRS 20 RST 14 EXC VTTL DVCC DVCC DVCC DVCC AVCC AVCC AVCC AVCC OVCC OVCC OVCC OVCC RDOP RDON RCOP RCON 26 25 31 30 28 9 FILP FILG 8 FILN 10 FM 6 2.2µF 2.2µF 20Ω 20Ω -4.5V 450Ω AVEE1 AVEE2 GVEE DVEE DVEE DVEE DVEE DVEE 50Ω 2 12 1 35 36 22 21 34 -2V EXCS AND CRS ARE CONNECTED FOR 622Mbps...