CAT1641WI-45-T3 Equivalent & Substitute Parts

Part Overview

The CAT1641WI-45-T3 is a Power Management Integrated Circuit (PMIC) functioning as a supervisor with open drain or open collector output. This device is designed for simple reset and power-on reset applications, monitoring a single voltage channel with a 4.5V threshold. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure long-term component availability for new production runs and field replacements.

Substiute Parts

CAT1641WI-45-T3

onsemiIn Stock: 819CAT1641WI-45-T3 Datasheet

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CAT1641YI-45-T3

onsemiIn Stock: 888CAT1641YI-45-T3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT1641WI-45-T3 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage threshold: 4.5V
• Number of voltages monitored: 1 channel
• Output type: Open Drain or Open Collector
• Reset polarity: Active High
• Reset timeout: 130ms Minimum
• Operating temperature range: -40°C ~ 85°C
• Supervisor function type: Simple Reset/Power-On Reset
• Mounting type: Surface Mount

Package Consideration: The CAT1641WI-45-T3 utilizes an 8-SOIC package. Substitute parts may employ alternative 8-pin surface mount packages (such as 8-TSSOP) provided all electrical parameters remain identical and the physical footprint is compatible with the application's printed circuit board layout.

Base Product Series: All substitute parts share the CAT1641 base product number, indicating they are part of the same supervisor IC family from onsemi with equivalent functional specifications.

Parameter Comparison

Engineering Selection Recommendations

The CAT1641YI-45-T3 is the active equivalent substitute for the obsolete CAT1641WI-45-T3. Both parts are manufactured by onsemi and share identical electrical specifications across all critical parameters: 4.5V threshold voltage, single-channel monitoring, open drain/open collector output, active high reset, and 130ms minimum reset timeout.

The primary difference between these parts is packaging: the main part uses an 8-SOIC package while the substitute uses an 8-TSSOP package. Both are surface mount configurations with compatible pin counts and electrical functionality.

The CAT1641YI-45-T3 holds active product status and carries ROHS3 compliance certification, providing assurance of ongoing manufacturer support and regulatory alignment. Both parts maintain identical moisture sensitivity levels (MSL 1) and REACH compliance status.

Selection of the CAT1641YI-45-T3 as a substitute requires verification that the 8-TSSOP package footprint is compatible with the target application's printed circuit board design. Pin-to-pin electrical functionality remains unchanged, ensuring circuit operation equivalence.

Frequently Asked Questions (FAQ)

Q: Can the CAT1641YI-45-T3 directly replace the CAT1641WI-45-T3 in existing designs?

A: Electrical functionality is identical. Direct replacement requires confirmation that the 8-TSSOP package footprint is compatible with the PCB layout designed for the 8-SOIC package. Pin assignments and electrical characteristics are equivalent.

Q: What is the primary reason for substitution?

A: The CAT1641WI-45-T3 is classified as obsolete. The CAT1641YI-45-T3 is an active product from the same manufacturer with identical electrical specifications, ensuring continued component availability.

Q: Are the voltage threshold and reset timeout specifications identical?

A: Yes. Both parts feature a 4.5V voltage threshold and 130ms minimum reset timeout. All electrical parameters for supervisor operation are identical.

Q: What is the difference between the 8-SOIC and 8-TSSOP packages?

A: Both are 8-pin surface mount packages. The 8-SOIC has a width of 0.154" (3.90mm), while the 8-TSSOP has a width of 0.173" (4.40mm). Pin spacing and electrical connectivity differ, requiring PCB layout compatibility verification.

Q: Do both parts support the same operating temperature range?

A: Yes. Both the CAT1641WI-45-T3 and CAT1641YI-45-T3 operate across -40°C to 85°C.

Q: What compliance certifications apply to the substitute part?

A: The CAT1641YI-45-T3 is ROHS3 compliant and REACH unaffected. Both parts maintain MSL 1 (unlimited moisture sensitivity level).

Q: Are there any differences in reset polarity or output type?

A: No. Both parts feature active high reset polarity and open drain or open collector output configuration.