LMK1D1208PRHAT

Clock Buffers, Drivers Overview

The LMK1D1208PRHAT is a pin-controlled, low additive jitter LVDS clock buffer featuring two selectable inputs and eight differential outputs. It supports input frequencies up to 2 GHz with a maximum propagation delay of less than 575 ps and output skew under 20 ps. Additive jitter is specified at less than 60 fs RMS (12 kHz to 20 MHz bandwidth). The device operates on a single supply voltage of 1.8 V, 2.5 V, or 3.3 V ± 5% and functions within an industrial temperature range of –40°C to +105°C. It utilizes a 40-pin VQFN package.

Clock Buffers, Drivers Feature Summary

• Pin-controlled individual output enable/disable for each channel
• Low additive jitter: < 60 fs RMS maximum at 156.25 MHz
• Universal inputs accepting LVDS, LVPECL, LVCMOS, HCSL, and CML
• Configurable output amplitude via AMP_SEL pin (350 mV or 500 mV)

Clock Buffers, Drivers Applications

• Telecommunications and networking
• Medical imaging
• Test and measurement
• Wireless infrastructure

Clock Buffers, Drivers Procurement Notes

Verify the suffix 'RHAR' against the manufacturer's orderable addendum to confirm specific packaging details such as reel size or tape width. Ensure the component matches the RHA package designation found in the datasheet. Confirm that the pin configuration aligns with the 40-pin VQFN layout provided in the official documentation before integration.

Clock Buffers, Drivers Selection Notes

Select this model when hardware pin control is required for individual output enablement rather than I2C configuration. Choose the LMK1D1208P over the LMK1D1208I if digital interface complexity must be minimized. Verify that the required output swing (standard 350 mV or boosted 500 mV) can be achieved using the AMP_SEL pin logic levels available in the target system design.

Clock Buffers, Drivers Part Context

This component belongs to the LMK1D120x family of low additive jitter LVDS buffers. It shares core electrical specifications with the LMK1D1208I but differs in its configuration method, utilizing physical pins instead of an I2C interface for output control. It serves as a fan-out buffer for distributing high-frequency clock signals with minimal skew across multiple destinations.

Clock Buffers, Drivers Replacement Considerations

The LMK1D1208I offers identical electrical performance but requires I2C programming for output control. The LMK1D1208 provides global output enable control via a single pin rather than individual channel control. Both alternatives utilize different package footprints compared to the 40-pin VQFN used by the LMK1D1208P.