TPS3837K33DBVT Equivalent & Substitute Parts

Part Overview

The TPS3837K33DBVT is a Power Management Integrated Circuit (PMIC) supervisor device manufactured by Texas Instruments, designed for single-channel voltage monitoring and reset signal generation. This device operates as a push-pull, totem pole output supervisor with active-high reset functionality and a 2.93V voltage threshold. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring supervisor functionality with these specific electrical characteristics.

Substiute Parts

TPS3837K33DBVT

Texas InstrumentsIn Stock: 2212TPS3837K33DBVT Datasheet

Current PartRFQ

TPS3840DL29DBVR

Texas InstrumentsIn Stock: 4017TPS3840DL29DBVR Datasheet

MFR RecommendedRFQ

TPS3837K33DBVR

Texas InstrumentsIn Stock: 2275TPS3837K33DBVR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS3837K33DBVT are identified based on strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Package / Case: SC-74A, SOT-753 (SOT-23-5 supplier package)
• Mounting Type: Surface Mount
• Number of Voltages Monitored: 1 Channel
• Manufacturer: Texas Instruments
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Functional Parameters Defining Substitution Categories:

• Output Type (Push-Pull, Totem Pole vs. Open Drain/Open Collector)
• Reset Logic (Active High vs. Active Low)
• Voltage Threshold (2.93V nominal)
• Reset Timeout characteristics
• Operating Temperature Range

Two substitute parts are identified:

1. TPS3837K33DBVR — Parametric equivalent with identical electrical and functional characteristics
2. TPS3840DL29DBVR — Manufacturer-recommended substitute with functional differences in output type and reset logic

Parameter Comparison

Engineering Selection Recommendations

TPS3837K33DBVR (Parametric Equivalent): This part is a direct parametric equivalent to the TPS3837K33DBVT, matching all electrical, functional, and mechanical specifications. The only difference is the packaging format (tape and reel variant). This substitute is suitable for applications requiring identical performance characteristics. Both parts share Last Time Buy status, indicating limited future availability.

TPS3840DL29DBVR (Manufacturer-Recommended Substitute): This part is recommended by Texas Instruments as a substitute but introduces functional differences that require circuit-level evaluation:

• Output configuration changes from push-pull, totem pole to open drain/open collector
• Reset logic inverts from active high to active low
• Reset timeout extends from 10ms minimum to 619ms typical
• Operating temperature range expands to -40°C ~ 125°C (TJ)
• Product status is Active, ensuring long-term availability

The TPS3840DL29DBVR is suitable only for designs where the functional differences (output type, reset polarity, and timeout characteristics) are compatible with the application circuit. Circuit redesign may be required to accommodate the inverted reset logic and different output stage topology.

Frequently Asked Questions (FAQ)

Q: Can TPS3837K33DBVR be used as a direct drop-in replacement for TPS3837K33DBVT?

A: Yes. The TPS3837K33DBVR is a parametric equivalent with identical electrical specifications, voltage threshold, output type, reset logic, and operating temperature range. The parts differ only in packaging format (tape and reel variant). Both are mechanically compatible with the same PCB footprint (SOT-23-5).

Q: What are the key differences between TPS3837K33DBVT and TPS3840DL29DBVR?

A: The TPS3840DL29DBVR differs in three critical areas: (1) output stage topology changes from push-pull, totem pole to open drain/open collector, requiring external pull-up resistors; (2) reset logic inverts from active high to active low, necessitating circuit redesign; (3) reset timeout increases from 10ms minimum to 619ms typical. These differences require circuit-level compatibility analysis before substitution.

Q: Is the TPS3840DL29DBVR a direct replacement?

A: No. While the TPS3840DL29DBVR is manufacturer-recommended as a substitute, it is not a direct drop-in replacement due to functional differences in output type and reset polarity. Circuit modifications are required to accommodate the inverted reset logic and open-drain output configuration.

Q: Are all three parts available in the same package?

A: Yes. All three parts use the SC-74A, SOT-753 package with SOT-23-5 supplier device package designation, ensuring mechanical compatibility on the same PCB footprint.

Q: What is the significance of the Last Time Buy status for TPS3837K33DBVT and TPS3837K33DBVR?

A: Last Time Buy status indicates that these parts are no longer in active production and will not be manufactured beyond a specified date. For long-term supply chain planning, the TPS3840DL29DBVR (Active status) is the recommended long-term alternative, provided circuit modifications are feasible.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, have Moisture Sensitivity Level 1 (Unlimited), and carry the same REACH and ECCN classifications (REACH Unaffected, EAR99).

Q: What is the voltage threshold difference between TPS3837K33DBVT and TPS3840DL29DBVR?

A: The TPS3837K33DBVT has a voltage threshold of 2.93V, while the TPS3840DL29DBVR has a threshold of 2.9V. This 0.03V difference is within typical tolerance ranges for supervisor applications but should be verified against specific circuit requirements.