LMK00334RTVR

Overview

The LMK00334RTVR is a four-output PCIe clock buffer and level translator manufactured by Texas Instruments. It supports input frequencies up to 400 MHz, accepting LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or single-ended clocks via two general-purpose inputs, or crystal oscillators (10–40 MHz) via a dedicated input. The device distributes the selected clock to two groups of differential HCSL outputs and one LVCMOS output with synchronous enable control. Powered by a 3.3V core and independent 3.3V/2.5V output supplies, it operates within an industrial temperature range of -40°C to +85°C in a 32-WQFN (5x5 mm) package.

Feature Summary

• 3:1 Input Multiplexer supporting multiple logic standards including LVPECL, LVDS, CML, and crystal inputs
• Low jitter performance with typical RMS phase jitter of 30fs at 100MHz for PCIe Gen3
• High Power Supply Rejection Ratio (PSRR) of -72dBc at 156.25MHz
• LVCMOS output with synchronous enable input for glitch-free operation

Applications

• PCI Express (PCIe 3.0) clock distribution
• SATA/SAS interfaces
• High-frequency backplane timing
• ADC/DAC clocking systems

Procurement Notes

Verify the specific suffix RTVR against the official datasheet to confirm the tape-and-reel packaging configuration and standard commercial temperature grade. Ensure compatibility with the required 3.3V core and 3.3V/2.5V I/O supply voltages during procurement planning.

Selection Notes

Select this component when a low-jitter buffer is needed for PCIe Gen3 or similar high-speed serial links. The LMK00334 provides flexible input options and separate output power domains, making it suitable for systems requiring precise timing margins and level translation between different voltage standards.

Part Context

The LMK00334 belongs to Texas Instruments' family of high-performance clock buffers designed for data communication and computing applications. It serves as a replacement for fixed-output buffers, offering increased system timing margin through its configurable input multiplexer and low-noise architecture.

Replacement Considerations

The automotive-grade variant LMK00334RTVTQ1 offers AEC-Q100 qualification but may differ in operating temperature range or reliability specifications compared to the commercial LMK00334RTVR.