PI6LC4840ZHEX

Overview

The PI6LC4840ZHEX is a crystal-to-LVDS/LVCMOS frequency synthesizer designed for demanding Ethernet applications. It operates on a 3.3V supply (3.135V to 3.465V) and supports 25MHz and 125MHz frequencies. The device features three output banks: Bank A provides three pin-selectable 25/50MHz LVCMOS outputs; Bank B offers three 125MHz LVCMOS outputs; and Bank C delivers three 125MHz LVDS outputs. Additionally, it includes one dedicated 25MHz LVCMOS reference clock output without PLL involvement. Integrated phase noise is specified at a maximum of 1ps for the 12kHz-20MHz range.

Feature Summary

• Three distinct output banks providing flexible 25MHz, 50MHz, and 125MHz signals in both LVCMOS and LVDS formats
• Low integrated phase noise design with a maximum of 1ps across the 12kHz-20MHz bandwidth
• Supports 25MHz crystal input with internal pull-up/down resistors for mode configuration
• Industrial temperature range operation from -40°C to 85°C

Applications

• Ethernet network infrastructure requiring precise clocking
• Systems utilizing 125MHz LVDS or LVCMOS interfaces
• Embedded networking equipment needing low jitter synthesis

Procurement Notes

Verify the specific ordering suffix 'E' confirms Pb-free and Green compliance as per manufacturer documentation. Confirm the 'X' suffix indicates Tape/Reel packaging format. Ensure the base part number matches the ZH package code for the 32-contact TQFN form factor before procurement.

Selection Notes

Select this component when both LVDS and LVCMOS outputs are required simultaneously for 125MHz signals. Verify that the application can accommodate the 32-contact TQFN package dimensions. Check if the fixed 25MHz crystal input meets the system's timing requirements, as the device is not programmable via I2C.

Part Context

This part belongs to the HiFlex family of clock generators from Diodes Incorporated (formerly Pericom). It is specifically engineered for high-performance networking applications where low phase noise and mixed signal output types are critical. The ZH suffix denotes the specific 32-contact Thin Fine Pitch Quad Flat No-lead package.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineering evaluation is required to match electrical specifications, pinout compatibility, and package dimensions for any alternative components.