CDCUN1208LPRHBR

Overview

The CDCUN1208LPRHBR is a clock buffer and distribution device manufactured by Texas Instruments. It features a 2:8 fanout ratio, accepting differential or single-ended inputs and providing eight corresponding outputs. The component supports HCSL, LVCMOS, and LVDS input/output logic levels. It operates within a supply voltage range of 1.7 V to 3.63 V and supports maximum frequencies up to 400 MHz. Designed for surface mount assembly, it is housed in a 32-VQFN package with an exposed pad (5x5 mm). The device functions reliably across an operating temperature range of -40°C to +85°C.

Feature Summary

• 2:8 Fanout Ratio: Distributes one input signal to eight output channels.
• Flexible Logic Levels: Supports HCSL, LVCMOS, and LVDS for both inputs and outputs.
• Wide Supply Range: Operates on voltages from 1.7 V to 3.63 V.
• Compact Packaging: Available in a 32-VQFN (5x5) package suitable for space-constrained designs.

Applications

• Clock distribution networks requiring low skew buffering.
• Systems utilizing LVDS or HCSL signaling standards.
• Digital signal processing interfaces needing multiple clock taps.
• Embedded systems requiring flexible voltage level translation between clock sources and loads.

Procurement Notes

Verify the specific ordering suffix LPRHBR against the manufacturer's current datasheet to confirm tape and reel quantities and packaging specifications. Ensure compatibility with the target PCB footprint for the 32-VQFN exposed pad package. Confirm that the required operating temperature range of -40°C to +85°C aligns with the system environment constraints before finalizing procurement.

Selection Notes

Select this component when a 2:8 clock distribution ratio is required with support for mixed-signal logic levels like LVDS and HCSL. The 400 MHz maximum frequency limit should be evaluated against the system clock requirements. Consider the 32-VQFN package size if board real estate is limited. Verify that the 1.7 V to 3.63 V supply voltage range matches the available power rails in the design.

Part Context

This part belongs to the family of clock buffers and drivers designed for high-performance timing applications. It serves as a bridge between primary clock sources and downstream synchronous components. The device simplifies layout by providing multiple buffered outputs from a single source, reducing load capacitance on the reference oscillator.

Replacement Considerations

Check for pin-compatible alternatives within the same Texas Instruments portfolio that offer similar 2:8 ratios and voltage ranges. Verify that any substitute maintains the same input/output logic level support (LVDS/HCSL/LVCMOS) and package dimensions to ensure mechanical interchangeability without redesigning the PCB.