SCAN25100TYA

Overview

The SCAN25100TYA is a serializer/deserializer (SerDes) designed for high-speed bidirectional serial data transmission over FR-4 printed circuit board backplanes, balanced cables, and optical fiber. It supports CPRI data rates of 2457.6, 1228.8, and 614.4 Mbps. The device features independent transmit and receive PLLs, an on-chip oscillator, and precision delay calibration measurement (DCM) that directly measures link delays to within ±800 ps accuracy. It includes intelligent clock management for remote radio head synchronization, programmable transmitter de-emphasis, receiver equalization, and hot plug protection. The component operates in industrial temperature ranges (-40°C to +85°C) and is housed in a 100-pin HTQFP package with an exposed ground pad.

Feature Summary

• Integrates precision delay calibration measurement (DCM) circuitry to measure T14 and Toffset delays with better than ±800 ps accuracy.
• Features independent transmit and receive PLLs with low noise recovered clock output to eliminate the need for external jitter cleaning in single-hop applications.
• Includes advanced testability features such as IEEE 1149.1 and 1149.6 support, at-speed BIST pattern generator/verifier, and multiple loopback modes.
• Provides hot plug protection and comprehensive line status reporting including LOS, LOF, 8b/10b line code violation, comma detection, and receiver PLL lock.

Applications

• High-speed bidirectional serial data transmission over FR-4 printed circuit board backplanes
• CPRI interface implementation for remote radio head synchronization
• Data transmission over balanced cables and optical fiber

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product folder to confirm pinout compatibility and electrical specifications. Ensure the selected variant matches the required voltage levels and package type for your design. Cross-reference the datasheet revision date to ensure all errata and updates are accounted for during the procurement process.

Selection Notes

Select this component when designing systems requiring precise timing alignment between base stations and remote radio heads. Consider the available operating modes, including 8-bit and 10-bit parallel bus interfaces, and verify that the power supply requirements align with your system's voltage rails. Evaluate the thermal performance needs given the maximum power dissipation capabilities of the HTQFP package.

Part Context

The SCAN25100 series was originally developed by National Semiconductor and is now manufactured by Texas Instruments following their acquisition. The TYA suffix specifically denotes the 100-pin HTQFP package variant. This component belongs to a family of SerDes devices optimized for CPRI applications, offering integrated clock management and delay calibration to simplify system architecture.

Replacement Considerations

SCAN25100TYA/NOPB