TPS3511D Equivalent & Substitute Parts

Part Overview

The TPS3511D is a multi-voltage supervisor IC from Texas Instruments designed for power management applications. This device monitors three independent voltage channels with fixed thresholds (3.3V, 5V, 12V) and provides active-low reset output via open drain or open collector configuration. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or long-term support requirements.

Substiute Parts

TPS3511D

Texas InstrumentsIn Stock: 859TPS3511D Datasheet

Current PartRFQ

TPS3808G01DBVR

Texas InstrumentsIn Stock: 120351TPS3808G01DBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS3511D is constrained by the following critical parameters:

• Channel Count: The main part monitors 3 independent voltage channels. Direct substitutes must support equivalent multi-channel monitoring capability or be used in a configuration that maintains the same functional protection.
• Voltage Thresholds: Fixed thresholds of 3.3V, 5V, and 12V are application-specific. Substitute parts with adjustable or selectable thresholds may be used if the design can accommodate threshold configuration.
• Output Configuration: Open drain or open collector output is required for reset signal generation. Substitute parts must maintain this output type.
• Reset Logic and Timeout: Active-low reset with 100ms minimum timeout defines the power-on reset behavior. Substitutes must support equivalent or compatible reset characteristics.
• Package and Thermal Range: The 8-SOIC package and -40°C to 85°C operating range are design constraints. Package compatibility and thermal specifications must be verified for board-level integration.

The identified substitute part TPS3808G01DBVR represents a different product category (single-channel simple reset) and is not a direct functional equivalent due to reduced channel count and different threshold configuration. This part may be considered only in applications where single-channel monitoring is sufficient and threshold adjustment capability is acceptable.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Functionality):

No direct functional equivalent is identified in the provided substitute list. The TPS3511D's three-channel fixed-threshold architecture is a specialized configuration. If continued supply of the TPS3511D is unavailable, design modification is required.

For Functional Redesign (Single-Channel Applications):

The TPS3808G01DBVR may be considered only if the application can be modified to operate with single-channel voltage monitoring. This requires:

• Elimination of dual-channel or triple-channel protection logic
• Reconfiguration of threshold values through adjustable/selectable settings
• Board-level redesign to accommodate SOT-23-6 package instead of 8-SOIC
• Verification that the wider operating temperature range (-40°C to 125°C) meets or exceeds application requirements

Compliance Considerations:

Both parts maintain ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status. No regulatory barriers exist for substitution from a compliance perspective.

Supply Chain Status:

The TPS3808G01DBVR is in Active product status with 120,310 units in stock, providing superior long-term availability compared to the Last Time Buy status of the TPS3511D.

Frequently Asked Questions (FAQ)

Q: Can the TPS3808G01DBVR directly replace the TPS3511D without circuit modification?

A: No. The TPS3808G01DBVR is a single-channel supervisor with adjustable thresholds, while the TPS3511D monitors three fixed-threshold channels. Direct substitution is not possible without circuit redesign and threshold reconfiguration.

Q: What is the primary difference between these two supervisor ICs?

A: The TPS3511D is a multi-voltage supervisor with three independent fixed-threshold channels (3.3V, 5V, 12V). The TPS3808G01DBVR is a simple reset IC with one adjustable/selectable threshold channel. They serve different application requirements.

Q: Are there package compatibility issues between TPS3511D and TPS3808G01DBVR?

A: Yes. The TPS3511D uses an 8-SOIC package (0.154", 3.90mm width), while the TPS3808G01DBVR uses SOT-23-6. PCB layout and footprint redesign is required for substitution.

Q: Do both parts meet the same compliance and environmental standards?

A: Yes. Both parts are ROHS3 compliant, have MSL 1 (unlimited moisture sensitivity), and are REACH unaffected. Environmental and regulatory requirements are equivalent.

Q: What is the significance of the TPS3511D being in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this part. Existing inventory is limited, and no new production is planned. Alternative parts or design modifications must be identified for future production requirements.

Q: Can the TPS3808G01DBVR's adjustable thresholds be configured to match the TPS3511D's fixed thresholds?

A: The TPS3808G01DBVR supports adjustable/selectable thresholds, which can be configured to specific voltage levels. However, this requires external component selection or configuration logic and does not replicate the three-channel simultaneous monitoring of the TPS3511D.

Q: What is the operating temperature difference between these parts?

A: The TPS3511D operates from -40°C to 85°C (TA), while the TPS3808G01DBVR operates from -40°C to 125°C (TJ). The substitute part has a wider temperature range, which may be advantageous for high-temperature applications.