TPS3606-33DGS Equivalent & Substitute Parts

Part Overview

The TPS3606-33DGS is a single-channel power management supervisor IC manufactured by Texas Instruments, designed for battery backup circuit applications. This device features push-pull totem pole output with active-low reset functionality and a 60ms minimum reset timeout. The part is classified as Last Time Buy, indicating end-of-life status and limited availability. Finding equivalent substitute parts is necessary to ensure long-term supply chain continuity and support for new production runs or design revisions.

Substiute Parts

TPS3606-33DGS

Texas InstrumentsIn Stock: 2558TPS3606-33DGS Datasheet

Current PartRFQ

TPS3808G01DBVR

Texas InstrumentsIn Stock: 120351TPS3808G01DBVR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TPS3606-33DGS is based on the following critical parameters:

• Single-channel voltage monitoring capability: The substitute must monitor exactly one voltage rail
• Active-low reset output: The reset signal must be active low
• Surface mount packaging: The substitute must be compatible with surface mount assembly processes
• Compliance standards: RoHS3 compliance and MSL Level 1 rating are required for equivalent functionality
• Operating temperature range: The substitute must support the specified temperature range or exceed it
• Regulatory classifications: ECCN EAR99 and HTSUS 8542.39.0001 classification must be maintained

The TPS3808G01DBVR qualifies as a substitute based on these parameters. While it differs in output type (open drain versus push-pull), voltage threshold configurability, and reset timeout adjustability, it maintains the core single-channel monitoring function, active-low reset logic, surface mount form factor, and regulatory compliance required for equivalent operation in battery backup circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The TPS3808G01DBVR is an active product with full manufacturing support from Texas Instruments, whereas the TPS3606-33DGS is designated Last Time Buy with limited inventory. Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and regulatory qualification.

The TPS3808G01DBVR offers extended operating temperature range (-40°C ~ 125°C) compared to the main part (-40°C ~ 85°C), providing additional thermal margin for demanding applications. The adjustable voltage threshold and reset timeout parameters of the substitute provide design flexibility not available in the fixed-threshold main part.

The primary design consideration is the output stage difference: the main part uses push-pull totem pole output, while the substitute uses open drain or open collector output. Circuit designs must accommodate this output topology change, which may require pull-up resistor configuration adjustments.

Frequently Asked Questions (FAQ)

Q: Can the TPS3808G01DBVR directly replace the TPS3606-33DGS without circuit modifications?

A: Direct pin-for-pin replacement is not possible due to different package types (SOT-23-6 versus 10-TFSOP/10-MSOP) and output stage topology differences. Circuit redesign is required to accommodate the open drain output configuration and different pinout.

Q: What is the impact of the output type difference between push-pull and open drain?

A: Push-pull output actively drives both high and low states. Open drain output only actively pulls low; the high state requires an external pull-up resistor. Circuit designs must be modified to include appropriate pull-up resistor sizing based on load requirements and switching speed specifications.

Q: Does the adjustable voltage threshold of the TPS3808G01DBVR affect substitution compatibility?

A: The adjustable threshold capability of the substitute provides design flexibility. The main part's fixed 2.93V threshold can be replicated through external resistor network configuration on the substitute, maintaining functional equivalence.

Q: Are there inventory or lead time advantages to using the TPS3808G01DBVR?

A: Yes. The TPS3808G01DBVR is an active product with 120,310 units in stock, compared to the main part's Last Time Buy status with limited availability. The substitute provides superior supply chain continuity for ongoing production.

Q: Do both parts meet the same compliance and regulatory requirements?

A: Both parts are ROHS3 compliant, carry MSL Level 1 rating, and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, ensuring equivalent regulatory qualification for export and environmental compliance.