74VHC240MTC Equivalent & Substitute Parts

Part Overview

The 74VHC240MTC is a logic buffer integrated circuit manufactured by onsemi, classified as an inverting buffer with 2 elements and 4 bits per element, featuring 3-state output capability. This device operates across a supply voltage range of 2V to 5.5V and is housed in a 20-TSSOP surface mount package.

The 74VHC240MTC is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this logic buffer architecture.

Substiute Parts

74VHC240MTC

onsemiIn Stock: 189374VHC240MTC Datasheet

Current PartRFQ

MC74VHC240DTR2G

onsemiIn Stock: 2236MC74VHC240DTR2G Datasheet

DirectRFQ

SN74AHC240PWR

Texas InstrumentsIn Stock: 6328SN74AHC240PWR Datasheet

DirectRFQ

SN74AHC240PW

Texas InstrumentsIn Stock: 2720SN74AHC240PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74VHC240MTC are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Electrical 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: 2V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters:

• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed meet these parameters identically. Packaging format (Tube, Tape & Reel, or Cut Tape) represents a logistical variation and does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Recommended for New Designs): MC74VHC240DTR2G (onsemi) — This part maintains the same manufacturer lineage as the original 74VHC240MTC, operates with identical electrical specifications, and carries Active product status. It is supplied in Tape & Reel packaging format and is ROHS3 compliant with MSL 1 rating.

Secondary Substitute (Cross-Manufacturer Alternative): SN74AHC240PWR (Texas Instruments) — This part provides full electrical and mechanical compatibility with the 74VHC240MTC. The 74AHC series represents a functionally equivalent logic family to the 74VHC series. This part is Active and supplied in Cut Tape & Digi-Reel format, with ROHS3 compliance and MSL 1 rating.

Tertiary Option (Limited Availability): SN74AHC240PW (Texas Instruments) — This part meets all electrical and mechanical parameters but is listed as Discontinued at DiGi Electronics. It is supplied in Tube packaging and carries ROHS3 compliance with MSL 1 rating. This option is suitable only when existing inventory is available and long-term supply is not a requirement.

All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the MC74VHC240DTR2G directly replace the 74VHC240MTC in existing designs? A: Yes. The MC74VHC240DTR2G is electrically and mechanically identical to the 74VHC240MTC. Both parts share the same logic architecture, output specifications, supply voltage range, operating temperature range, and 20-TSSOP package footprint. The primary difference is packaging format (Tape & Reel versus Tube) and product status (Active versus Obsolete).

Q: What is the difference between the 74VHC and 74AHC logic series? A: Both series are CMOS logic families with identical electrical specifications for this buffer application. The 74VHC series is manufactured by onsemi, while the 74AHC series is manufactured by Texas Instruments. For the 74VHC240MTC and SN74AHC240PWR comparison, all functional parameters, output drive capabilities, supply voltage ranges, and operating temperatures are identical.

Q: Does packaging format affect electrical performance? A: No. Tube, Tape & Reel, and Cut Tape packaging formats are logistical variations only. They do not affect the electrical characteristics, performance, or functionality of the integrated circuit. Packaging selection is determined by assembly process requirements and inventory management practices.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts listed (MC74VHC240DTR2G, SN74AHC240PWR, and SN74AHC240PW) are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings, matching the compliance profile of the original 74VHC240MTC.

Q: Why is the SN74AHC240PW listed as a substitute if it is discontinued? A: The SN74AHC240PW is included for reference purposes and for applications where existing inventory is available. It meets all electrical and mechanical parameters but should not be selected for new designs or long-term production requirements due to its discontinued status at DiGi Electronics.

Q: What should I consider when selecting between MC74VHC240DTR2G and SN74AHC240PWR? A: Both parts are fully compatible. Selection should be based on: (1) manufacturer preference and supply chain relationships, (2) packaging format requirements (Tape & Reel versus Cut Tape), (3) current inventory availability, and (4) long-term supply assurance. Both parts carry Active product status and are suitable for new designs.