LMK1D1204PRHDR

Clock Buffers, Drivers Overview

The LMK1D1204PRHDR is a low additive jitter LVDS clock buffer from Texas Instruments, featuring two selectable inputs and four differential LVDS outputs. It supports input formats including LVDS, LVPECL, LVCMOS, HCSL, and CML, with output frequencies up to 2 GHz. The device operates on 1.8 V, 2.5 V, or 3.3 V supplies within an industrial temperature range of –40°C to 105°C. Key electrical specifications include maximum propagation delay of 575 ps, output skew of 20 ps, and additive jitter less than 60 fs RMS at 156.25 MHz (12 kHz–20 MHz). It utilizes hardware pins for individual output enable/disable control and is housed in a 28-pin VQFN package.

Clock Buffers, Drivers Feature Summary

• Low additive jitter performance: <60 fs RMS maximum at 156.25 MHz (12 kHz–20 MHz integration range)
• Universal input compatibility supporting LVDS, LVPECL, LVCMOS, HCSL, and CML signals
• Individual hardware pin control for enabling or disabling each of the four LVDS outputs
• Fail-safe input function with integrated hysteresis to prevent random oscillation

Clock Buffers, Drivers Applications

• Telecommunications and networking equipment
• Medical imaging systems
• Test and measurement instruments
• Wireless infrastructure base stations
• Professional audio, video, and digital signage displays

Clock Buffers, Drivers Procurement Notes

Verify the ordering suffix 'RHDR' against the manufacturer's current orderable addendum to confirm specific reel quantities and tape-and-reel specifications. Ensure that the selected package variant matches the required PCB footprint dimensions for the 28-pin VQFN form factor.

Clock Buffers, Drivers Selection Notes

Select this component when independent per-channel output control is required via hardware pins rather than global enable or I2C configuration. It is suitable for designs needing low skew distribution of high-frequency clocks to multiple LVDS receivers while maintaining strict jitter budgets under varying supply voltages.

Clock Buffers, Drivers Part Context

This part belongs to the LMK1D120x family of low additive jitter LVDS buffers. Unlike the LMK1D1204 which uses global output enable, the LMK1D1204P variant provides individual output enable pins. It differs from the LMK1D1208 series by offering four output pairs instead of eight, fitting into a smaller 5 mm × 5 mm package compared to the larger packages used for higher channel counts.

Clock Buffers, Drivers Replacement Considerations

For direct functional replacement with pin-compatible hardware output enables, consider the LMK1D1204PRHDT. For variants with I2C-controlled outputs, the LMK1D1204I series may be considered if software configuration is acceptable.