LMK00338RTAT

Overview

The LMK00338RTAT is a clock buffer and level translator manufactured by Texas Instruments, designed for high-frequency, low-jitter clock and data distribution. It features eight outputs capable of HCSL and LVCMOS signaling, supporting maximum frequencies up to 400 MHz. The device accepts diverse input formats including CML, HCSL, LVDS, LVPECL, and crystal inputs. Operating on a single 3.3V core supply with independent output supplies, it ensures signal integrity across PCIe, SATA, and CPU applications within a -40°C to +85°C temperature range.

Feature Summary

• Eight-output architecture providing HCSL and LVCMOS levels for flexible system integration
• Multi-format input compatibility supporting CML, HCSL, LVDS, LVPECL, SSTL, HSTL, LVTTL, LVCMOS, and XTAL sources
• Maximum operating frequency of 400 MHz with a typical propagation delay of 2.3 ns
• Independent power domains allowing separate 3.3V/2.5V output supplies for optimized noise performance

Applications

• PCI Express (PCIe) clock distribution networks
• SATA interface timing synchronization
• CPU clock buffering and translation

Procurement Notes

Verify the suffix RTAT corresponds to the WQFN-40 package and reel/cut-tape packaging configuration. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements during storage and handling. Ensure the ordering part number matches the specific Texas Instruments manufacturer designation to avoid substitution errors.

Selection Notes

Select this component when an 8-channel buffer is required to translate various differential or single-ended input standards into HCSL or LVCMOS outputs. The device is suitable for systems needing independent output voltage domains to reduce ground bounce. Verify that the input source supports the specified logic families and that the 400 MHz frequency limit meets the system's timing requirements.

Part Context

The LMK00338 belongs to the LMK00334/38 family of clock buffers and level translators from Texas Instruments. This series is engineered to replace fixed-output buffer devices while increasing system timing margin. The RTAT suffix indicates a specific tape-and-reel packaging variant of the base LMK00338 model, intended for automated surface-mount assembly processes.

Replacement Considerations

The LMK00334 is a related member of the same family but offers different output configurations. Verify pinout compatibility and output drive strength differences before substituting. No direct cross-model substitutes are confirmed in the provided documentation.