TLK1521IPAPG4 Equivalent & Substitute Parts

Part Overview

The TLK1521IPAPG4 is a 1.3Gbps Serializer/Deserializer interface IC manufactured by Texas Instruments, designed for high-speed data transmission applications. This device features 18/1 input and 1/18 output configuration in a 64-HTQFP surface mount package. The product is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production and field replacements.

Substiute Parts

TLK1521IPAPG4

Texas InstrumentsIn Stock: 1721TLK1521IPAPG4 Datasheet

Current PartRFQ

TLK1501IRCP

Texas InstrumentsIn Stock: 1604TLK1501IRCP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLK1521IPAPG4 is determined by the following critical parameters:

Functional Compatibility: Both the main part and substitute must operate as Serializer/Deserializer interface ICs with compatible input/output configurations and signal types.

Electrical Specifications: Supply voltage range (2.3V ~ 2.7V) and operating temperature range (-40°C ~ 85°C) must be maintained or exceeded to ensure functional equivalence in the target application.

Data Rate Capability: The substitute must support the required data transmission speed. The TLK1521IPAPG4 operates at 1.3Gbps; substitutes with equal or higher data rate capability are acceptable.

Signal Interface Standards: Input type (LVTTL) and output type (VML) define the signal compatibility requirements. Substitutes must maintain compatible signal levels and impedance characteristics.

Package and Mounting: Surface mount 64-pin packages with compatible pinout and thermal characteristics ensure mechanical and electrical interchangeability on existing PCB designs.

Compliance and Certification: RoHS3 compliance and REACH unaffected status ensure regulatory alignment for current manufacturing standards.

Parameter Comparison

Engineering Selection Recommendations

The TLK1501IRCP is the manufacturer-recommended substitute for the obsolete TLK1521IPAPG4. Both devices share identical supply voltage ranges (2.3V ~ 2.7V), operating temperature specifications (-40°C ~ 85°C), and moisture sensitivity levels (MSL 3). Both maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with current manufacturing requirements.

The TLK1501IRCP offers enhanced data rate capability at 1.5Gbps compared to the 1.3Gbps of the main part, providing performance headroom for high-speed interface applications. The active product status of the TLK1501IRCP ensures long-term availability and supply chain continuity, eliminating obsolescence risk associated with the TLK1521IPAPG4.

Design integration requires evaluation of output signal type compatibility. The TLK1521IPAPG4 uses VML output, while the TLK1501IRCP uses CML output. Additionally, the input/output channel count differs (18/1 and 1/18 for the main part versus 16/1 and 1/16 for the substitute). These differences necessitate circuit-level assessment to confirm functional equivalence within the specific application context.

Frequently Asked Questions (FAQ)

Q: Can the TLK1501IRCP directly replace the TLK1521IPAPG4 without PCB modifications?

A: Direct replacement requires evaluation of output signal type compatibility and channel count differences. The TLK1501IRCP uses CML output versus VML output on the TLK1521IPAPG4, and supports 16 channels instead of 18. PCB layout and signal integrity analysis are necessary to confirm functional equivalence.

Q: What is the significance of the higher 1.5Gbps data rate on the TLK1501IRCP?

A: The TLK1501IRCP's 1.5Gbps capability exceeds the 1.3Gbps specification of the TLK1521IPAPG4, providing performance margin. This allows operation at the original design speed with additional bandwidth capacity for future application requirements.

Q: Are both parts compatible with the same supply voltage and temperature range?

A: Yes. Both the TLK1521IPAPG4 and TLK1501IRCP operate within identical supply voltage ranges (2.3V ~ 2.7V) and temperature specifications (-40°C ~ 85°C), ensuring compatibility with existing power distribution and thermal management designs.

Q: Why is the TLK1521IPAPG4 classified as obsolete?

A: The TLK1521IPAPG4 has reached end-of-life status in the Texas Instruments product portfolio. The TLK1501IRCP represents the active successor product, offering improved specifications and long-term manufacturing support.

Q: What packaging differences exist between these parts?

A: Both devices use 64-pin surface mount packages with 10x10mm footprints. The TLK1521IPAPG4 uses 64-PowerTQFP packaging, while the TLK1501IRCP uses 64-PowerVFQFP packaging. Pinout compatibility must be verified for PCB reuse.

Q: Are both parts RoHS compliant?

A: Yes. Both the TLK1521IPAPG4 and TLK1501IRCP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.