SN74ABT646APWR Equivalent & Substitute Parts

Part Overview

The SN74ABT646APWR is a non-inverting transceiver logic integrated circuit manufactured by Texas Instruments. It functions as a 1-element, 8-bit per element transceiver with 3-state output capability, housed in a 24-TSSOP surface mount package. The device operates within a 4.5V to 5.5V supply voltage range and supports bidirectional data transfer applications in digital systems.

The SN74ABT646APWR carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance requirements for systems utilizing this transceiver.

Substiute Parts

SN74ABT646APWR

Texas InstrumentsIn Stock: 3390SN74ABT646APWR Datasheet

Current PartRFQ

SN74ABT543APWR

Texas InstrumentsIn Stock: 3097SN74ABT543APWR Datasheet

Parametric EquivalentRFQ

SN74ABT646PWR

Texas InstrumentsIn Stock: 761SN74ABT646PWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74ABT646APWR are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 32mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 24-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount

Two substitute parts meet these criteria: SN74ABT646PWR and SN74ABT543APWR. Both devices maintain identical electrical specifications and physical packaging, enabling direct functional replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts—SN74ABT646PWR and SN74ABT543APWR—provide equivalent electrical and mechanical functionality to the obsolete SN74ABT646APWR. Selection between substitutes should be based on availability and compliance requirements.

SN74ABT646PWR maintains the same base product number (74ABT646) as the original part, offering direct compatibility with existing designs and documentation. This part carries Active product status and is ROHS3 compliant.

SN74ABT543APWR, while using a different base product number (74ABT543), meets all critical electrical and mechanical parameters. This part also carries Active product status and is ROHS3 compliant. Both parts are REACH Unaffected and classified under ECCN EAR99.

Current inventory availability: SN74ABT646PWR (710 Pcs), SN74ABT543APWR (3083 Pcs).

Frequently Asked Questions (FAQ)

Q: Can SN74ABT646PWR be used as a direct replacement for SN74ABT646APWR?

A: Yes. Both parts share identical electrical specifications, output characteristics, supply voltage range, operating temperature range, and 24-TSSOP surface mount packaging. The primary difference is product status: SN74ABT646APWR is Obsolete while SN74ABT646PWR is Active.

Q: What is the difference between SN74ABT646PWR and SN74ABT543APWR?

A: Both parts are parametric equivalents with identical electrical performance and packaging. The base product numbers differ (74ABT646 versus 74ABT543), but all critical parameters—transceiver type, bit width, output current, supply voltage, temperature range, and physical package—are identical.

Q: Are there any packaging differences between these parts?

A: No. All three parts use the 24-TSSOP surface mount package with 0.173" width and 4.40mm dimensions. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: Do these substitutes maintain compliance certifications?

A: Yes. All substitute parts are ROHS3 compliant, REACH Unaffected, and classified under ECCN EAR99, matching the compliance profile of the original SN74ABT646APWR.

Q: Which substitute should be selected based on availability?

A: SN74ABT543APWR currently has higher inventory (3083 Pcs) compared to SN74ABT646PWR (710 Pcs). Selection may depend on supply chain requirements and lead time considerations.