TPS3128E18DBVT Equivalent & Substitute Parts

Part Overview

The TPS3128E18DBVT is a single-channel power supply supervisor IC manufactured by Texas Instruments, designed for power management and reset signal generation in electronic systems. This device operates as a simple reset/power-on reset supervisor with an open drain output configuration, housed in a compact SOT-23-5 surface mount package.

The TPS3128E18DBVT is designated as Last Time Buy, indicating that production has been discontinued and existing inventory represents the final availability from the manufacturer. This status necessitates identification of equivalent substitute components to ensure design continuity and long-term supply chain reliability for applications currently utilizing this part number.

Substiute Parts

TPS3128E18DBVT

Texas InstrumentsIn Stock: 1569TPS3128E18DBVT Datasheet

Current PartRFQ

TPS3126E18DBVR

Texas InstrumentsIn Stock: 2256TPS3126E18DBVR Datasheet

Parametric EquivalentRFQ

TPS3126E18DBVT

Texas InstrumentsIn Stock: 2322TPS3126E18DBVT Datasheet

Parametric EquivalentRFQ

TPS3128E18DBVR

Texas InstrumentsIn Stock: 3440TPS3128E18DBVR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS3128E18DBVT is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Number of Voltages Monitored: 1 channel
• Voltage - Threshold: 1.71V
• Output Configuration: Open Drain or Open Collector
• Reset Logic: Active Low
• Reset Timeout: 100ms Minimum
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Package / Case: SC-74A, SOT-753
• Supplier Device Package: SOT-23-5
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

All identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original TPS3128E18DBVT. Substitution is valid across all three alternative part numbers without circuit modification or design re-qualification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TPS3128E18DBVR

The TPS3128E18DBVR is the preferred substitute for the TPS3128E18DBVT. This part maintains the same base product number (TPS3128) and carries Active product status, ensuring continued manufacturer support and long-term availability. The only difference is the packaging suffix (R vs. T), which indicates different tape and reel configurations but identical electrical and mechanical specifications. Current inventory of 3,416 units provides immediate supply security.

Secondary Recommendation: TPS3126E18DBVR

The TPS3126E18DBVR offers equivalent electrical performance with Active product status. This part represents a different base product line (TPS3126) but maintains all critical electrical parameters and physical compatibility. Inventory of 2,200 units supports sustained supply. This option is suitable when TPS3128E18DBVR availability is constrained.

Tertiary Option: TPS3126E18DBVT

The TPS3126E18DBVT provides electrical equivalence but carries Last Time Buy status, similar to the original part. This option should be considered only when the TPS3128E18DBVR and TPS3126E18DBVR are unavailable. Inventory of 2,300 units is available.

All three substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can TPS3128E18DBVR be used as a direct replacement for TPS3128E18DBVT without circuit modification?

A: Yes. Both parts are electrically and mechanically identical. The suffix difference (R vs. T) indicates only the tape and reel configuration for automated assembly. No circuit changes are required.

Q: What is the difference between TPS3128 and TPS3126 base product numbers?

A: Both base product numbers meet the same electrical specifications for this application: 1-channel supervision, 1.71V threshold, active low reset, 100ms timeout, and SOT-23-5 packaging. The base number difference does not affect functional compatibility.

Q: Why is TPS3128E18DBVT designated as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of this specific part number. Existing inventory represents the final availability. Substitute parts with Active status should be selected for new designs or long-term production requirements.

Q: Are all substitute parts available in the same SOT-23-5 package?

A: Yes. All substitute parts use the SC-74A, SOT-753 package designation with SOT-23-5 supplier device package specification. PCB footprints and assembly processes remain unchanged.

Q: Do the substitute parts have the same moisture sensitivity rating?

A: Yes. All substitute parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which substitute part should be selected for new production designs?

A: TPS3128E18DBVR is recommended for new designs due to its Active product status and identical base product number to the original part, ensuring long-term manufacturer support and availability.