CDC2536DBR

Overview

The CDC2536DBR is a low-power, high-performance clock driver manufactured by Texas Instruments. It features a single PLL circuit capable of generating multiple output frequencies from a single input source. The device supports an input frequency range up to 140 MHz and provides six differential LVPECL outputs with a maximum operating frequency of 700 MHz. It operates on a single 3.3 V supply voltage and is housed in a 48-pin TSSOP package. The component includes integrated charge pump functionality for loop filter design simplification.

Feature Summary

• Integrates a high-speed phase-locked loop (PLL) with an internal charge pump for efficient clock synthesis.
• Provides six differential LVPECL outputs designed for low-jitter signal distribution in high-speed digital systems.
• Supports flexible frequency multiplication and division ratios to accommodate various system timing requirements.

Applications

• Clock generation and distribution in telecommunications infrastructure equipment.
• Timing solutions for high-speed data converters and ADC/DAC systems.
• Synchronization circuits in networking switches and routers.

Procurement Notes

Verify the specific suffix 'DBR' corresponds to the tape-and-reel packaging configuration required for automated assembly processes. Confirm that the 48-pin TSSOP footprint matches the target PCB layout dimensions. Ensure the 3.3 V power supply rail meets the current sourcing and sinking capabilities specified in the electrical characteristics table of the official datasheet.

Selection Notes

Select this component when a single-input, multi-output clock solution with differential LVPECL signaling is required. Compare against other members of the CDC25xx family if different output counts or logic families such as LVTTL are needed. Evaluate the maximum input frequency limit against the reference clock source capability to ensure proper PLL lock acquisition within the specified operating temperature range.

Part Context

The CDC2536 belongs to the CDC25xx series of clock drivers from Texas Instruments. This series is designed for applications requiring precise clock synchronization and jitter attenuation. The DBR variant specifically denotes the surface-mount TSSOP package with reel packaging, distinguishing it from tube-packaged equivalents like the CDC2536D.

Replacement Considerations

Public confirmed substitute part numbers: CDC2536D, CDC2536DR.