SN74S240NG4 Equivalent & Substitute Parts

Part Overview

The SN74S240NG4 is a logic buffer integrated circuit manufactured by Texas Instruments, classified as an inverting buffer with 2 elements and 4 bits per element. This device features 3-state output capability and operates within a 4.75V to 5.25V supply voltage range. The part is currently discontinued at DiGi Electronics, making identification of suitable substitutes essential for ongoing system support and component procurement.

Substiute Parts

SN74S240NG4

Texas InstrumentsIn Stock: 1152SN74S240NG4 Datasheet

Current PartRFQ

SN74S240N

Texas InstrumentsIn Stock: 2962SN74S240N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SN74S240NG4 is determined by strict equivalence across the following critical parameters:

• Logic type and function: Buffer, Inverting configuration
• Element and bit architecture: 2 elements with 4 bits per element
• Output configuration: 3-State output capability
• Electrical specifications: 15mA output high current, 64mA output low current
• Supply voltage range: 4.75V ~ 5.25V
• Operating temperature range: 0°C ~ 70°C
• Package form factor: 20-DIP (0.300", 7.62mm)
• Mounting technology: Through Hole

The SN74S240N qualifies as a direct substitute based on identical electrical and functional parameters. The primary distinction is product status and packaging format, with the SN74S240N currently active in inventory.

Parameter Comparison

Engineering Selection Recommendations

The SN74S240N is the appropriate substitute for the discontinued SN74S240NG4. Both parts maintain identical electrical characteristics, functional architecture, and physical form factor. The SN74S240N carries active product status with current inventory availability, ensuring supply chain continuity. Both parts comply with ROHS3 standards and REACH regulations, meeting modern environmental and regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Are the SN74S240NG4 and SN74S240N electrically interchangeable?

A: Yes. Both parts share identical logic type, element configuration, output specifications, supply voltage range, operating temperature range, and output current ratings. They are direct functional equivalents.

Q: What is the difference between these two part numbers?

A: The primary differences are product status and packaging format. The SN74S240NG4 is discontinued, while the SN74S240N is active. The SN74S240N is supplied in tube packaging, whereas the SN74S240NG4 packaging format was not specified in available data.

Q: Can I use the SN74S240N as a drop-in replacement in existing designs?

A: Yes. The SN74S240N maintains the same 20-DIP through-hole package form factor, pin configuration, and electrical specifications as the SN74S240NG4, enabling direct substitution in PCB designs without modification.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory and environmental standards.

Q: What supply voltage range do these parts support?

A: Both the SN74S240NG4 and SN74S240N operate within a 4.75V to 5.25V supply voltage range, suitable for standard 5V logic applications.