SN74LVC543APWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC543APWRE4 is a non-inverting transceiver logic IC manufactured by Texas Instruments, designed for 8-bit data bus applications with 3-state output capability. This device operates across a supply voltage range of 1.65V to 3.6V and is housed in a 24-TSSOP surface mount package. The part is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

SN74LVC543APWRE4

Texas InstrumentsIn Stock: 839SN74LVC543APWRE4 Datasheet

Current PartRFQ

SN74LVC543APWR

Texas InstrumentsIn Stock: 4108SN74LVC543APWR Datasheet

MFR RecommendedRFQ

SN74LVC2952APWR

Texas InstrumentsIn Stock: 789SN74LVC2952APWR Datasheet

Parametric EquivalentRFQ

SN74LVC2952APWT

Texas InstrumentsIn Stock: 807SN74LVC2952APWT Datasheet

Parametric EquivalentRFQ

SN74LVC543APWT

Texas InstrumentsIn Stock: 1508SN74LVC543APWT Datasheet

Parametric EquivalentRFQ

SN74LVC646APWT

Texas InstrumentsIn Stock: 899SN74LVC646APWT Datasheet

Parametric EquivalentRFQ

SN74LVC652APWR

Texas InstrumentsIn Stock: 3458SN74LVC652APWR Datasheet

Parametric EquivalentRFQ

SN74LVC652APWT

Texas InstrumentsIn Stock: 1842SN74LVC652APWT Datasheet

Parametric EquivalentRFQ

74LCX543MTCX

Fairchild SemiconductorIn Stock: 295474LCX543MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC543APWRE4 are classified based on strict parameter equivalence. The primary substitution criteria are:

Critical Parameters for Substitution:

• Logic Type: Transceiver, Non-Inverting
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Voltage - Supply: 1.65V ~ 3.6V (or compatible range)
• Operating Temperature: -40°C ~ 85°C (TA)
• Package / Case: 24-TSSOP
• RoHS Status: ROHS3 Compliant

Substitution Categories:

Category 1: Direct Manufacturer Equivalents (Texas Instruments 74LVC Series) Parts with identical base product specifications but different packaging configurations (Tape & Reel vs. individual packaging).

Category 2: Parametric Equivalents (Texas Instruments 74LVC Series) Parts with different base product numbers but matching all critical electrical and mechanical parameters.

Category 3: Cross-Manufacturer Equivalent (Fairchild Semiconductor 74LCX Series) Parts from alternative manufacturers meeting identical functional and package specifications with minor voltage supply range variation (2V ~ 3.6V vs. 1.65V ~ 3.6V).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74LVC543APWR This part is the manufacturer-recommended direct equivalent with active product status. It maintains identical electrical specifications and 24-TSSOP packaging. The Tape & Reel packaging format (TR) is standard for production environments. Inventory availability is substantial at 4080 units.

Secondary Recommendation: SN74LVC652APWR or SN74LVC652APWT These parametric equivalents from Texas Instruments meet all critical electrical and mechanical requirements. Both are active products with robust inventory levels (3400 and 1776 units respectively). The APWR variant offers Tape & Reel packaging for production use.

Alternative Recommendation: 74LCX543MTCX This Fairchild Semiconductor part provides cross-manufacturer compatibility with identical functional specifications. The supply voltage range is 2V ~ 3.6V, which is compatible with most applications using the original part. Active product status and high inventory (2899 units) support long-term availability.

Avoid: Parts with discontinued status (SN74LVC543APWRE4, SN74LVC2952APWT, SN74LVC646APWT) should not be selected for new designs or long-term production due to end-of-life status.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC543APWR be used as a direct replacement for SN74LVC543APWRE4? A: Yes. Both parts are identical in electrical specifications, logic function, and 24-TSSOP package. The primary difference is packaging format (Tape & Reel vs. individual packaging) and product status (Active vs. Discontinued). SN74LVC543APWR is the active equivalent.

Q: What is the difference between APWR and APWT packaging designations? A: APWR indicates Tape & Reel packaging, standard for production and automated assembly. APWT indicates alternative packaging. Both maintain identical electrical and mechanical specifications.

Q: Are the SN74LVC2952 and SN74LVC652 series compatible with the SN74LVC543? A: Yes, from a parametric standpoint. All three series (543, 2952, 652) meet the critical substitution criteria: 1 element, 8 bits per element, 3-state output, 24mA drive current, 1.65V ~ 3.6V supply, and 24-TSSOP packaging. Functional differences between base product numbers do not affect substitution eligibility based on provided parameters.

Q: Can the Fairchild 74LCX543MTCX replace the Texas Instruments SN74LVC543APWRE4? A: Yes, with one consideration. The 74LCX543MTCX has a minimum supply voltage of 2V versus 1.65V for the original part. If your application requires operation below 2V, this part is not suitable. For applications operating at 2V and above, it is a valid substitute with active product status and good inventory availability.

Q: What compliance certifications apply to all substitute parts? A: All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the original part's compliance profile. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all Texas Instruments variants.

Q: Which substitute part offers the best long-term availability? A: SN74LVC543APWR (Texas Instruments, Active status, 4080 units in stock) and SN74LVC652APWR (Texas Instruments, Active status, 3400 units in stock) both offer active product status with substantial inventory. Active status ensures continued manufacturing and supply chain support.