Analog Devices Inc.

LTC6957IDD-1

LTC6957IDD-1 Description

The LTC6957IDD-1 from Analog Devices Inc. is a high-performance 1:2 fanout buffer designed for precise clock distribution in demanding applications. This obsolete surface-mount IC supports input signals in CML, CMOS, LVDS, and LVPECL formats, converting them to LVPECL outputs with a maximum frequency of 300 MHz. Operating within a tight supply voltage range of 3.15V to 3.45V, it ensures low-jitter signal integrity, making it ideal for high-speed digital systems. Packaged in a 12-pin DFN (Tube), the device is optimized for low-noise, high-fidelity clock distribution in communication, test equipment, and data acquisition systems.

LTC6957IDD-1 Features

• 1:2 Input-to-Output Ratio: Distributes one input to two synchronized outputs with minimal skew.
• Wide Input Compatibility: Accepts CML, CMOS, LVDS, and LVPECL inputs, offering flexibility in system design.
• LVPECL Outputs: Ensures high-speed, low-jitter performance for critical timing applications.
• 300 MHz Maximum Frequency: Suitable for high-frequency clock distribution.
• 3.3V Operation: Optimized for 3.15V–3.45V supplies, reducing power consumption in mixed-voltage systems.
• Surface-Mount DFN Package: Compact footprint for space-constrained PCB layouts.
• Low Moisture Sensitivity (MSL 1): Robust for extended storage and handling.

LTC6957IDD-1 Applications

• Telecommunications: Clock distribution in base stations and network switches.
• Test & Measurement: High-precision timing for oscilloscopes and signal analyzers.
• Data Acquisition Systems: Synchronization of ADCs and FPGAs.
• Military/Aerospace: Reliable clocking in rugged environments (though ECCN-obsolete status may limit new designs).
• High-Speed Computing: Clock tree management in servers and data centers.

Conclusion of LTC6957IDD-1

The LTC6957IDD-1 excels in low-jitter, high-frequency clock distribution, offering superior signal integrity and input flexibility. While now obsolete, its LVPECL outputs, wide input compatibility, and 300 MHz bandwidth make it a historical benchmark for timing applications. Engineers seeking legacy replacements should consider newer Analog Devices alternatives with enhanced features, but the LTC6957IDD-1 remains a proven solution for archived designs requiring robust performance.