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Product Detailed Parameters
- Description：IC PLL CLOCK GEN LO JITT 48TQFN
- Series：-
- PLL：Yes
- Mfr：Microchip Technology
- Main Purpose：Ethernet, Fibre Channel, SONET/SDH
- Input：LVCMOS, LVTTL, Crystal
- Output：LVCMOS, LVDS, LVPECL
- Number of Circuits：1
- Ratio - Input:Output：3:10
- Differential - Input:Output：Yes/Yes
- Frequency - Max：800MHz
- Voltage - Supply：3V ~ 3.6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Surface Mount
- Package / Case：48-WFQFN Exposed Pad
- Supplier Device Package：48-TQFN (7x7)
- Grade：-
- Qualification：-
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Overview
The MAX3637ETM2 is a low-jitter, wide frequency range programmable clock generator with 10 outputs. It features a phase-locked loop (PLL) and on-chip crystal oscillator for Ethernet, Fibre Channel, and SONET/SDH applications. The device provides nine differential LVDS/LVPECL outputs and one LVCMOS output across three banks. Key electrical parameters include a maximum output frequency of 800MHz, a supply voltage range of 3V to 3.6V, and an integrated phase jitter of 0.34psRMS (12kHz to 20MHz). It operates from -40°C to +85°C in a 48-TQFN package.
Feature Summary
- Pin-programmable LVDS/LVPECL output interfaces with three individual output banks
- Subpicosecond jitter generation: 0.34psRMS (12kHz to 20MHz)
- Wide VCO tuning range from 3.60GHz to 3.83GHz
- Excellent power-supply noise rejection with isolated VCO supply pin
Applications
- Ethernet Switch/Router
- Wireless Base Station
- Fibre Channel SAN
- SONET Line Cards
Procurement Notes
Verify the specific suffix ETM2 against official Microchip documentation to confirm temperature grade and packaging details. Ensure compatibility with 3.3V logic levels and check for RoHS compliance status if required by system specifications.
Selection Notes
Select this component when subpicosecond jitter performance is critical for high-speed data transmission. The pin-programmable dividers allow flexible frequency synthesis without external programming tools. Ensure the reference input matches the available LVCMOS, differential, or crystal options.
Part Context
The MAX3637 serves as a replacement for multiple crystal oscillators and clock distribution ICs. It consolidates clock generation functions into a single 48-pin TQFN package, reducing board space and cost for next-generation network equipment requiring robust clock distribution.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided source material.
FAQ
What is the maximum operating frequency for the differential outputs?
The differential LVDS and LVPECL outputs can operate up to 800MHz.
How is the output interface configured?
The output interface for each bank is pin-programmable via control pins (QA_CTRL1, QA_CTRL2, QB_CTRL, QC_CTRL) to select between LVDS and LVPECL modes.
What is the integrated phase jitter specification?
The integrated phase jitter is typically 0.34psRMS over the 12kHz to 20MHz bandwidth and 0.14psRMS over the 1.875MHz to 20MHz bandwidth.
