SCAN12100TYA

Overview

The SCAN12100TYA is a serializer/deserializer (SerDes) supporting CPRI data rates of 614.4 Mbps and 1228.8 Mbps. It features independent transmit and receive PLLs for seamless remote radio head synchronization. The device integrates precision delay calibration measurement (DCM) with accuracy better than ±800 ps for link delays and ±1200 ps for chip delays. It operates within an industrial temperature range of -40°C to +85°C and accepts a 30.72 MHz reference clock. The parallel interface supports both 1.8V LVCMOS and 3.3V LVTTL logic levels via the VSEL pin.

Feature Summary

• Integrates precision delay calibration measurement circuitry to quantify link and chip latency components.
• Features independent transmit and receive phase-locked loops to enable automatic remote radio head synchronization without external jitter cleaning.
• Supports configurable transmitter de-emphasis and receiver equalization to compensate for signal loss in backplanes and cables.
• Includes advanced testability features such as IEEE 1149.1 JTAG, at-speed BIST, and multiple loopback modes.

Applications

• Base station front-haul links using Common Public Radio Interface (CPRI) protocols.
• High-speed bidirectional serial data transmission over FR-4 printed circuit board backplanes.
• Connections utilizing balanced copper cables or optical fiber media.
• Remote radio head synchronization networks requiring deterministic latency.

Procurement Notes

Verify the specific ordering suffix TYA corresponds to the 100-pin TQFP package with an exposed ground pad. Confirm that the supply voltage requirements match the intended logic level configuration, as IOVDD must be set to either 1.8V or 3.3V depending on the VSEL pin state. Ensure thermal management provisions are adequate for the maximum power dissipation specified in the datasheet.

Selection Notes

Select this component when deterministic latency and precise delay calibration are required for CPRI applications. It is suitable for designs needing independent clock domains for transmit and receive paths to simplify synchronization. Verify compatibility with existing system clocks, specifically the 30.72 MHz reference requirement. Consider the pinout if migration from the SCAN25100 is planned, as they share package compatibility.

Part Context

The SCAN12100 is part of the National Semiconductor (now Texas Instruments) SCAN series of high-speed SerDes devices. It serves as a lower-speed variant compared to the SCAN25100, which supports up to 2457.6 Mbps. Both devices share pin and package compatibility, facilitating design upgrades. The family targets mobile network infrastructure, specifically base station implementations requiring robust serial communication.

Replacement Considerations

The SCAN25100 is a compatible higher-speed alternative within the same product family. It maintains pin and package compatibility with the SCAN12100. Verify that the target application does not require the additional bandwidth provided by the SCAN25100 before substituting.