LM8805TLE-3.0/NOPB Equivalent & Substitute Parts

Part Overview

The LM8805TLE-3.0/NOPB is a Supervisor Push-Pull, Totem Pole reset IC manufactured by Texas Instruments, designed for power management applications requiring simple reset and power-on reset functionality. This device monitors a single voltage threshold at 3V and provides active-low reset output with a 1ms minimum reset timeout. The part is classified as obsolete, making identification of functionally compatible alternatives essential for ongoing system support and new design implementations.

Substiute Parts

LM8805TLE-3.0/NOPB

Texas InstrumentsIn Stock: 1139LM8805TLE-3.0/NOPB Datasheet

Current PartRFQ

TPS628436YKAR

Texas InstrumentsIn Stock: 958TPS628436YKAR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution analysis for the LM8805TLE-3.0/NOPB is constrained by the following critical parameters:

Functional Requirements:

• Single voltage monitoring channel
• 3V threshold detection
• Active-low reset output with push-pull/totem pole configuration
• 1ms minimum reset timeout
• Simple reset/power-on reset topology

Environmental & Compliance Requirements:

• Operating temperature range: -40°C to 85°C minimum
• RoHS3 compliance
• MSL Level 1 (unlimited moisture sensitivity)
• Surface mount technology

Package Compatibility:

• 9-pin BGA package footprint (9-DSBGA/9-TFBGA)

The identified substitute, TPS628436YKAR, represents a functional alternative from the same manufacturer (Texas Instruments) within the Power Management (PMIC) category. However, this substitute operates in a different functional domain (Buck Switching Regulator) compared to the original supervisor reset IC. Substitution is valid only when system architecture permits replacement of the reset supervisor function with an integrated buck regulator solution that includes internal reset generation or when the reset function is externally managed through alternative circuitry.

Parameter Comparison

Engineering Selection Recommendations

Obsolescence Status: The LM8805TLE-3.0/NOPB is classified as obsolete. The TPS628436YKAR maintains active product status with Texas Instruments, ensuring continued availability and manufacturing support.

Compliance & Certification: Both parts maintain ROHS3 compliance and MSL Level 1 rating, satisfying regulatory and environmental requirements for industrial and commercial applications.

Functional Divergence: The primary consideration for substitution is functional architecture. The LM8805TLE-3.0/NOPB operates as a dedicated supervisor reset IC, while the TPS628436YKAR functions as a buck switching regulator. Direct pin-for-pin substitution is not feasible due to different pin counts (9-pin versus 6-pin) and functional signal definitions. Substitution requires system-level redesign to accommodate the regulator topology or external reset generation circuitry.

Temperature Performance: The TPS628436YKAR supports an extended operating temperature range (-40°C to 125°C) compared to the original part (-40°C to 85°C), providing additional thermal margin for demanding applications.

Package Considerations: Both devices utilize BGA surface-mount technology with MSL Level 1 rating. However, the 6-DSBGA package of the substitute requires PCB layout modification from the original 9-DSBGA footprint.

Frequently Asked Questions (FAQ)

Q: Can the TPS628436YKAR be used as a direct replacement for the LM8805TLE-3.0/NOPB?

A: No. While both are Texas Instruments Power Management ICs, they serve different functions. The LM8805TLE-3.0/NOPB is a supervisor reset IC, whereas the TPS628436YKAR is a buck switching regulator. Direct pin-for-pin substitution is not possible due to different pin counts (9 versus 6) and signal definitions. Substitution requires system redesign.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) Manufacturer compatibility (Texas Instruments); (2) Product status (active versus obsolete); (3) RoHS and MSL compliance; (4) Operating temperature range adequacy; (5) Functional architecture compatibility; (6) Package footprint accommodation on PCB.

Q: Why is the package different between these parts?

A: The LM8805TLE-3.0/NOPB uses a 9-pin BGA package (9-DSBGA) to accommodate nine signal connections for supervisor functionality. The TPS628436YKAR uses a 6-pin BGA package (6-DSBGA) optimized for buck regulator topology, which requires fewer external connections. This difference necessitates PCB redesign.

Q: Are there compliance differences between the two parts?

A: No. Both parts maintain ROHS3 compliance and MSL Level 1 (unlimited) moisture sensitivity rating. Both are suitable for industrial and commercial applications with equivalent environmental handling requirements.

Q: What is the temperature performance difference?

A: The LM8805TLE-3.0/NOPB operates from -40°C to 85°C (TJ). The TPS628436YKAR extends this range to -40°C to 125°C (TJ), providing 40°C additional thermal headroom for high-temperature applications.

Q: How does the obsolescence status affect part selection?

A: The LM8805TLE-3.0/NOPB is obsolete, meaning Texas Instruments no longer manufactures or supports this device. The TPS628436YKAR maintains active status with ongoing manufacturing and technical support, making it suitable for new designs and long-term system support.