Multirate CDR with Limiting Amplifier Exceeds All SONET/SDH Jitter Specifications
The MAX3872 is a compact, multirate clock and data recovery with limiting amplifier for OC-3, OC-12, OC-24, OC-48, OC-48 with FEC SONET/SDH and Gigabit Ethernet (1.25Gbps/2.5Gbps) applications. Without using an external reference clock, the fully integrated phase-locked loop (PLL) recovers a synchronous clock signal from the serial NRZ data input. The input data is then retimed by the recovered clock, providing a clean data output. An additional serial input (SLBI±) is available for system loopback diagnostic testing. Alternatively, this input can be connected to a reference clock to maintain a valid clock output in the absence of data transitions. The device also includes a loss-of-lock (active-low LOL) output. The MAX3872 contains a vertical threshold control to compensate for optical noise due to EDFAs in DWDM transmission systems. The recovered data and clock outputs are CML with on-chip 50Ω back termination on each line. Its jitter performance exceeds all SONET/SDH specifications. The MAX3872 operates from a single +3.3V supply and typically consumes 580mW. It is available in a 5mm x 5mm 32-pin thin QFN with exposed-pad package and operates over a -40°C to +85°C temperature range.
title | Download file |
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MAX3872 Data Sheet | MAX3872.pdf |
Part Number | Functions | Target Oper. Range (Gbps) | Data Rate (Mbps) | Data Rate (Mbps) | Multirate | VSUPPLY (V) | ICC (mA) | I/O Type | Package/Pins | Oper. Temp. (°C) | Budgetary Price |
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min | max | typ | See Notes | ||||||||
MAX3872 | CDR | 1 to 4.5 <1 | 155 | 2667 | Yes | 3.3 | 175 | CML | QFN/32 TQFN/32 | -40 to +85 | $22.62 @1k |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
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MAX3872AETJ+ | Active | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
MAX3872AETJ+T | Active | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
MAX3872EGJ | No Longer Available | MAX3872ETJ+ | QFN,;32 pin;26 mm² | -40°C to +85°C | No |
MAX3872EGJ-T | No Longer Available | MAX3872ETJ+ | QFN;32 pin | -40°C to +85°C | See data sheet |
MAX3872ETJ+ | Active | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
MAX3872ETJ+T | Active | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free |