SN74AHCT240NSRE4 Equivalent & Substitute Parts

Part Overview

The SN74AHCT240NSRE4 is a logic buffer integrated circuit manufactured by Texas Instruments, classified as an inverting buffer with 2 elements and 4 bits per element. The device features 3-state output capability and operates across a 4.5V to 5.5V supply voltage range. This part is currently discontinued at DiGi Electronics, making identification of equivalent substitute components essential for ongoing design support and procurement.

Substiute Parts

SN74AHCT240NSRE4

Texas InstrumentsIn Stock: 907SN74AHCT240NSRE4 Datasheet

Current PartRFQ

SN74AHCT240NSR

Texas InstrumentsIn Stock: 1971SN74AHCT240NSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74AHCT240NSRE4 is determined by strict equivalence across the following critical parameters:

• Logic type and functional configuration (Buffer, Inverting)
• Element and bit-per-element count (2 elements, 4 bits per element)
• Output architecture (3-State)
• Output current specifications (8mA, 8mA)
• Supply voltage range (4.5V ~ 5.5V)
• Operating temperature range (-40°C ~ 125°C)
• Package and case dimensions (20-SOIC, 0.209", 5.30mm Width)
• Mounting type (Surface Mount)

The primary substitute identified is the SN74AHCT240NSR, which maintains identical electrical and mechanical specifications while differing only in packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The SN74AHCT240NSR serves as the direct functional equivalent to the SN74AHCT240NSRE4. Both parts are manufactured by Texas Instruments and maintain identical electrical characteristics, thermal specifications, and mechanical dimensions. The primary distinction is product status: the SN74AHCT240NSRE4 is discontinued, while the SN74AHCT240NSR remains in active production.

Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. The SN74AHCT240NSR is available in Tape & Reel packaging format, which is standard for high-volume manufacturing and assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHCT240NSR directly replace the SN74AHCT240NSRE4 in existing designs?

A: Yes. The SN74AHCT240NSR is electrically and mechanically equivalent. Both parts share identical logic configuration, output specifications, supply voltage range, operating temperature range, and package dimensions. The only difference is packaging format and product availability status.

Q: What is the difference between the tube and Tape & Reel packaging formats?

A: The SN74AHCT240NSRE4 is supplied in tube packaging, while the SN74AHCT240NSR is supplied in Tape & Reel format. Tape & Reel is the standard format for automated assembly and high-volume production. Tube packaging is typically used for lower-volume or manual assembly applications. Both formats contain the same die and are functionally identical.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the SN74AHCT240NSRE4 and SN74AHCT240NSR carry identical RoHS3 compliance and REACH unaffected status. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: Why is the SN74AHCT240NSRE4 discontinued?

A: Product discontinuation decisions are made by manufacturers based on market demand and production priorities. The SN74AHCT240NSR remains in active production and serves the same functional requirements.

Q: What are the critical parameters for substitution compatibility?

A: Substitution compatibility is determined by: logic type (Buffer, Inverting), element count (2), bits per element (4), output type (3-State), output current (8mA, 8mA), supply voltage (4.5V ~ 5.5V), operating temperature (-40°C ~ 125°C), and package dimensions (20-SOIC, 0.209", 5.30mm Width).