74VHCT240AMTC Equivalent & Substitute Parts

Part Overview

The 74VHCT240AMTC is an inverting buffer logic IC manufactured by onsemi, designed for 2-element, 4-bit per element configurations with 3-state output capability. This component operates across a 4.5V to 5.5V supply voltage range and is housed in a 20-TSSOP surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

74VHCT240AMTC

onsemiIn Stock: 1757074VHCT240AMTC Datasheet

Current PartRFQ

74VHCT240AMTCX

Fairchild SemiconductorIn Stock: 520574VHCT240AMTCX Datasheet

DirectRFQ

MC74VHCT240ADTRG

onsemiIn Stock: 2275MC74VHCT240ADTRG Datasheet

DirectRFQ

74AHCT240PW-Q100J

Nexperia USA Inc.In Stock: 571874AHCT240PW-Q100J Datasheet

SimilarRFQ

CAHCT240IPWRG4Q1

Texas InstrumentsIn Stock: 2797CAHCT240IPWRG4Q1 Datasheet

SimilarRFQ

SN74AHCT240DBR

Texas InstrumentsIn Stock: 1388SN74AHCT240DBR Datasheet

SimilarRFQ

SN74AHCT240PW

Texas InstrumentsIn Stock: 1054SN74AHCT240PW Datasheet

SimilarRFQ

SN74AHCT240PWR

Texas InstrumentsIn Stock: 4942SN74AHCT240PWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74VHCT240AMTC is determined by strict equivalence across the following critical parameters:

• Logic Type: Buffer, Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 8mA, 8mA
• Voltage - Supply: 4.5V ~ 5.5V
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Direct Equivalents maintain identical electrical and mechanical specifications, including package type (20-TSSOP) and operating temperature range (-40°C ~ 85°C).

Similar Substitutes share core electrical parameters but may differ in operating temperature range, package variant (20-SSOP vs. 20-TSSOP), product status, or automotive qualification. These parts are functionally compatible but require design review for specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

Use 74VHCT240AMTCX (Fairchild Semiconductor) or MC74VHCT240ADTRG (onsemi) as primary alternatives. Both maintain the 74VHCT series designation, identical electrical parameters, and 20-TSSOP packaging. MC74VHCT240ADTRG is supplied in Tape & Reel format and carries RoHS3 compliance and REACH unaffected status.

For Extended Temperature Range Applications:

74AHCT240PW-Q100J (Nexperia USA Inc.) and SN74AHCT240PWR (Texas Instruments) extend the operating temperature range to -40°C ~ 125°C while maintaining 20-TSSOP packaging. Both are AEC-Q100 qualified for automotive applications and carry RoHS3 compliance. SN74AHCT240PWR is actively stocked and available in Cut Tape and Digi-Reel packaging.

For Package Variant Consideration:

SN74AHCT240DBR (Texas Instruments) provides equivalent electrical performance in a 20-SSOP package (0.209", 5.30mm Width) with extended temperature range (-40°C ~ 125°C). This option is suitable only if PCB layout accommodates the wider package footprint.

Compliance and Availability:

All active substitute parts carry RoHS3 compliance and REACH unaffected status. MC74VHCT240ADTRG and CAHCT240IPWRG4Q1 maintain the original -40°C ~ 85°C operating range. SN74AHCT240PWR offers the highest current inventory (4,850 units) among active alternatives.

Frequently Asked Questions (FAQ)

Q: Can 74AHCT240 series parts directly replace 74VHCT240AMTC?

A: Yes, with design verification. The 74AHCT series shares identical logic type, element count, bit configuration, output type, and current specifications. The primary difference is extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). Verify that your application does not require the narrower temperature specification of the original part.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: Both are 20-pin surface mount packages with identical pin configurations. The 20-TSSOP measures 0.173" (4.40mm) width, while the 20-SSOP measures 0.209" (5.30mm) width. PCB layout and component density requirements determine package suitability. Verify footprint compatibility before selecting SN74AHCT240DBR.

Q: Are automotive-qualified parts (AEC-Q100) suitable for non-automotive applications?

A: Yes. AEC-Q100 qualification indicates enhanced reliability testing and is a superset of standard industrial specifications. Parts such as 74AHCT240PW-Q100J and CAHCT240IPWRG4Q1 are suitable for any application requiring the specified electrical and thermal parameters.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, requiring no special moisture control during storage, handling, or assembly. All listed substitute parts carry MSL 1 classification, eliminating moisture-related procurement or assembly constraints.

Q: Which substitute offers the best long-term availability?

A: SN74AHCT240PWR (Texas Instruments) is listed as Active with 4,850 units in current inventory. MC74VHCT240ADTRG (onsemi) is also Active with 2,240 units. Both manufacturers maintain active production status, supporting long-term design continuity.

Q: Can I use parts with different packaging formats interchangeably?

A: Packaging format (Bulk, Tape & Reel, Cut Tape, Tube) affects procurement and assembly processes but does not impact electrical performance. Select packaging based on production volume and assembly equipment compatibility. Electrical specifications remain identical across all packaging formats for the same part number.