TLK105LRHBT Equivalent & Substitute Parts

Part Overview

The TLK105LRHBT is a half-duplex transceiver interface IC manufactured by Texas Instruments, designed for MII and RMII protocol applications. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. The part is housed in a 32-VQFN (5x5) surface mount package with an exposed pad and operates within a 3V to 3.6V supply voltage range across an industrial temperature range of -40°C to 85°C.

Finding equivalent or substitute parts becomes necessary when the TLK105LRHBT reaches inventory depletion or when design requirements mandate active product status for long-term production support and supply chain continuity.

Substiute Parts

TLK105LRHBT

Texas InstrumentsIn Stock: 5305TLK105LRHBT Datasheet

Current PartRFQ

DP83822IRHBT

Texas InstrumentsIn Stock: 3451DP83822IRHBT Datasheet

MFR RecommendedRFQ

ADP5585ACBZ-00-R7

Analog Devices Inc.In Stock: 2120ADP5585ACBZ-00-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLK105LRHBT is determined by the following critical parameters:

Primary Substitution Criteria:

• Protocol support (MII and/or RMII interface capability)
• Package compatibility (32-VQFN 5x5 form factor with exposed pad)
• Voltage supply range overlap (minimum 3V to 3.6V operational window)
• Surface mount technology compatibility
• RoHS3 compliance status

Secondary Considerations:

• Product status (Active status preferred for new designs)
• Moisture sensitivity level and storage requirements
• Operating temperature range coverage

The substitute parts identified—DP83822IRHBT and ADP5585ACBZ-00-R7—are listed in the original component data but require evaluation against these criteria. The DP83822IRHBT shares the MII/RMII protocol requirement and identical package specification. The ADP5585ACBZ-00-R7 operates in a different functional category (I/O expansion and keypad interface) with a different package type (16-WLCSP), making it unsuitable as a direct functional substitute for transceiver applications.

Parameter Comparison

Engineering Selection Recommendations

DP83822IRHBT demonstrates functional and physical compatibility with the TLK105LRHBT. Both devices support MII and RMII protocols, utilize identical 32-VQFN (5x5) package specifications, and maintain RoHS3 compliance. The DP83822IRHBT operates at Active product status, providing supply chain stability and manufacturer support for new designs. The voltage supply range of 1.71V to 3.45V encompasses the TLK105LRHBT operating window of 3V to 3.6V, with overlap in the 3V to 3.45V region. This part is suitable for direct substitution in applications where the 3V to 3.45V supply voltage range is acceptable.

ADP5585ACBZ-00-R7 is not recommended as a substitute for transceiver applications. Although it maintains Active product status and RoHS3 compliance, it operates on the I2C protocol rather than MII/RMII, uses a different package form factor (16-WLCSP versus 32-VQFN), and serves keypad entry and I/O expansion functions rather than network transceiver functionality. This part addresses a different application category and cannot replace the TLK105LRHBT in MII/RMII transceiver circuits.

Frequently Asked Questions (FAQ)

Q: Can the DP83822IRHBT directly replace the TLK105LRHBT in existing designs?

A: The DP83822IRHBT shares the same package footprint (32-VQFN 5x5), protocol support (MII/RMII), and mounting technology. Substitution is feasible provided the system supply voltage operates within the overlapping range of 3V to 3.45V. Pin-level compatibility and functional equivalence should be verified against detailed datasheets before implementation.

Q: Why is the ADP5585ACBZ-00-R7 listed as a substitute if it uses a different package?

A: The ADP5585ACBZ-00-R7 is not a functional substitute for the TLK105LRHBT. It operates on I2C protocol for keypad and I/O expansion applications, whereas the TLK105LRHBT is a MII/RMII transceiver. The different package type (16-WLCSP) and functional purpose make this part unsuitable for direct replacement in transceiver circuits.

Q: What is the significance of the "Not For New Designs" status?

A: This designation indicates the TLK105LRHBT has reached end-of-life. Texas Instruments no longer recommends this part for new product development. Existing inventory may remain available, but long-term supply cannot be guaranteed. The DP83822IRHBT, with Active status, is the recommended path for new designs requiring MII/RMII transceiver functionality.

Q: Are there voltage supply considerations when substituting with the DP83822IRHBT?

A: Yes. The TLK105LRHBT operates at 3V to 3.6V, while the DP83822IRHBT operates at 1.71V to 3.45V. The overlap range is 3V to 3.45V. If your system requires operation above 3.45V, the DP83822IRHBT cannot be used. Verify your actual supply voltage specification before substitution.

Q: Do both parts have the same moisture sensitivity requirements?

A: Both the TLK105LRHBT and DP83822IRHBT carry MSL 2 (1 Year) ratings, indicating identical moisture sensitivity levels and storage requirements. The ADP5585ACBZ-00-R7 has a superior MSL 1 (Unlimited) rating, but this is irrelevant given its functional incompatibility.