TLK2521IPAP

Overview

The TLK2521IPAP is a multi-gigabit serializer/deserializer (SerDes) from the WizardLink family, designed for high-speed bidirectional point-to-point data transmission. It supports serial interface speeds ranging from 1 Gbps to 2.5 Gbps, delivering an effective data bandwidth of up to 2.25 Gbps. The device interfaces with 18-bit parallel buses and utilizes a 64-pin HTQFP PowerPAD package. Operating on a 2.5-V supply, it features selectable signal preemphasis, an internal PLL for clock synthesis, and hot-plug protection. Rated for industrial temperatures between -40°C and 85°C, it consumes 424 mW at 2.5 Gbps.

Feature Summary

• Supports serial data rates from 1 Gbps to 2.5 Gbps with 18-bit parallel I/O
• Integrates an on-chip PLL for clock synthesis from low-speed reference inputs
• Includes selectable signal preemphasis to compensate for inter-symbol interference in lossy media
• Provides hot-plug capability with power-on reset and loopback self-test functions

Applications

• High-speed backplane interconnect systems
• Point-to-point baseband data links over copper cables or controlled impedance PCBs
• Interfaces connecting to optical converters

Procurement Notes

Verify the specific suffix IPAP corresponds to the 64-pin HTQFP PowerPAD package variant. Confirm that the component meets the required industrial temperature range specifications (-40°C to 85°C). Ensure the ordering documentation matches the Texas Instruments WizardLink family designation for accurate functional compatibility.

Selection Notes

Select this component when replacing parallel architectures with serial links to reduce trace count and connector pins. Ensure the system design accommodates the 2.5-V supply requirement and provides adequate thermal management for the PowerPAD package. Verify that the host protocol device can handle the 18-bit parallel data width and GTX_CLK frequency requirements.

Part Context

The TLK2521 belongs to the WizardLink family of multi-gigabit transceivers manufactured by Texas Instruments. This series focuses on providing high-performance physical layer interfaces for converting parallel data to serial streams and vice versa, enabling efficient long-distance or high-bandwidth communication over various transmission media.

Replacement Considerations

Direct replacements include the TLK2521IPAPG4 and TLK2521IPAPR variants, which share identical electrical and functional specifications but may differ in packaging tape-and-reel configurations or lead-free compliance status.

FAQ

How does the TLK2521 handle synchronization during initialization?

The device supports rapid synchronization via SYNC patterns sent by the serializer, allowing deterministic lock times. It also supports random lock synchronization for open-loop applications or hot insertion into running backplanes.

What is the function of the LOOPEN pin?

Asserting the LOOPEN pin activates an internal loop-back path, routing transmitted serial data directly to the receiver inputs. This facilitates at-speed functional self-testing without external connections.

How is signal integrity maintained over lossy media?

The TLK2521 offers selectable signal preemphasis. When enabled, it drives the first bit of a run-length of same-value bits with a larger output swing to precompensate for inter-symbol interference.