TLK2521IPAP Equivalent & Substitute Parts

Part Overview

The TLK2521IPAP is a 2.5Gbps Serializer/Deserializer interface IC manufactured by Texas Instruments, housed in a 64-HTQFP package. This component features 18/1 input and 1/18 output configuration with LVTTL input and TTL/VML output types, operating across a 2.3V to 2.7V supply voltage range.

The TLK2521IPAP has reached obsolete product status. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or inventory replenishment where original stock is unavailable or depleted.

Substiute Parts

TLK2521IPAP

Texas InstrumentsIn Stock: 1816TLK2521IPAP Datasheet

Current PartRFQ

TLK2501IRCP

Texas InstrumentsIn Stock: 3721TLK2501IRCP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLK2521IPAP is determined by the following critical parameters:

• Data Rate Compatibility: The substitute must support 2.5Gbps operation
• Supply Voltage Range: Must operate within 2.3V to 2.7V
• Operating Temperature Range: Must support -40°C to 85°C (TA)
• Package Compatibility: Surface mount configuration with compatible pinout and thermal characteristics
• Serializer/Deserializer Function: Must provide equivalent serialization and deserialization capability
• Compliance Standards: RoHS3 compliance and REACH unaffected status required

The TLK2501IRCP qualifies as a manufacturer-recommended substitute. While it features a reduced input/output configuration (16/1 input, 1/16 output versus 18/1 and 1/18), it maintains the core 2.5Gbps data rate, identical supply voltage range, matching operating temperature specifications, and equivalent compliance certifications. The substitute uses a 64-HVQFP package, which is mechanically compatible with the original 64-HTQFP footprint for surface mount applications.

Parameter Comparison

Engineering Selection Recommendations

The TLK2501IRCP is the manufacturer-recommended substitute for the obsolete TLK2521IPAP. Both components maintain identical supply voltage specifications (2.3V to 2.7V) and operating temperature ranges (-40°C to 85°C), ensuring thermal and electrical compatibility in existing system designs.

Both parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The TLK2501IRCP holds active product status, ensuring continued availability and manufacturing support from Texas Instruments.

The primary design consideration is the reduced input/output channel count on the TLK2501IRCP (16/1 and 1/16 versus 18/1 and 1/18). Applications utilizing fewer than 16 input or output channels can directly adopt this substitute. Systems requiring the full 18-channel configuration must evaluate alternative architectures or multiple substitute devices.

The output type differs between parts: the TLK2521IPAP provides TTL and VML outputs, while the TLK2501IRCP provides CML outputs. Interface signal conditioning or level translation may be required depending on downstream receiver specifications.

Frequently Asked Questions (FAQ)

Q: Can the TLK2501IRCP directly replace the TLK2521IPAP in all applications?

A: Direct replacement is possible only for applications using 16 or fewer input/output channels. The TLK2501IRCP provides 16/1 input and 1/16 output configuration compared to the TLK2521IPAP's 18/1 and 1/18 configuration. Applications requiring all 18 channels must implement alternative solutions.

Q: Are the package footprints compatible between TLK2521IPAP and TLK2501IRCP?

A: Both components use 64-pin packages with 10x10mm dimensions suitable for surface mount assembly. The TLK2521IPAP uses 64-PowerTQFP while the TLK2501IRCP uses 64-PowerVFQFP. Mechanical compatibility exists for PCB footprint reuse, though pinout verification is required before board-level implementation.

Q: What is the significance of the output type difference (TTL/VML versus CML)?

A: The TLK2521IPAP outputs TTL and VML signal levels, while the TLK2501IRCP outputs CML (Current Mode Logic) levels. Downstream receiver circuits must be compatible with CML input specifications. Signal conditioning or level translation circuitry may be necessary depending on the application's receiver design.

Q: Why is the TLK2521IPAP obsolete while the TLK2501IRCP remains active?

A: Product lifecycle decisions are determined by market demand and manufacturing strategy. The TLK2501IRCP continues to meet current market requirements and maintains active production status. The TLK2521IPAP has been discontinued, making the TLK2501IRCP the supported path forward for new designs and legacy system updates.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both the TLK2521IPAP and TLK2501IRCP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.