74F240PC Equivalent & Substitute Parts

Part Overview

The 74F240PC is an inverting buffer logic integrated circuit manufactured by onsemi, designed for digital signal buffering and inversion applications. This device features 2 elements with 4 bits per element and 3-state output capability, operating within the 4.5V to 5.5V supply voltage range. The 74F240PC is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

74F240PC

onsemiIn Stock: 460174F240PC Datasheet

Current PartRFQ

SN74F240N

Texas InstrumentsIn Stock: 3112SN74F240N Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F240PC is determined by strict equivalence across the following critical parameters:

• Logic type and function: Buffer, Inverting configuration
• Element and bit architecture: 2 elements, 4 bits per element
• Output configuration: 3-State output capability
• Supply voltage range: 4.5V ~ 5.5V compatibility
• Operating temperature range: 0°C ~ 70°C
• Package form factor: 20-DIP (0.300", 7.62mm)
• Mounting technology: Through Hole

The SN74F240N from Texas Instruments satisfies all these criteria, providing direct functional equivalence while maintaining identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The SN74F240N is the direct equivalent substitute for the 74F240PC. Both devices share identical logic architecture, pin configuration, and electrical operating parameters within the specified voltage and temperature ranges. The SN74F240N offers the advantage of active product status from Texas Instruments, ensuring continued availability and supply chain reliability. Additionally, the SN74F240N carries ROHS3 compliance certification, meeting modern environmental and regulatory requirements.

The output high current specification differs between the two devices (3mA versus 15mA), with the SN74F240N providing higher drive capability. This enhanced output current does not create incompatibility; rather, it represents an improvement in signal integrity and fan-out capability for downstream logic circuits.

Frequently Asked Questions (FAQ)

Q: Can the SN74F240N directly replace the 74F240PC in existing designs?

A: Yes. Both devices are pin-compatible 20-DIP packages with identical logic function, element count, bit configuration, and 3-state output architecture. They operate within the same supply voltage range (4.5V ~ 5.5V) and temperature range (0°C ~ 70°C).

Q: What is the significance of the output current difference between these parts?

A: The SN74F240N provides 15mA output high current compared to the 74F240PC's 3mA. This difference indicates enhanced drive capability in the SN74F240N. Both devices maintain identical 64mA output low current. The higher output current in the substitute part does not create functional incompatibility and generally improves signal propagation characteristics.

Q: Why is the 74F240PC listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The SN74F240N from Texas Instruments remains in active production, providing a viable long-term supply source for this logic function.

Q: Are there packaging or mounting differences between these devices?

A: No. Both the 74F240PC and SN74F240N use identical 20-DIP (0.300", 7.62mm) through-hole packaging. They are mechanically and electrically interchangeable at the board level.

Q: Does the ROHS3 compliance of the SN74F240N affect compatibility?

A: No. ROHS3 compliance indicates the SN74F240N meets environmental and hazardous substance restrictions. This certification does not alter electrical function or pin compatibility. It represents a regulatory advantage for applications subject to environmental compliance requirements.