74ACTQ240PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ240PC is a Buffer, Inverting logic integrated circuit manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The 74ACTQ240PC operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-DIP package suitable for through-hole mounting applications.

Substiute Parts

74ACTQ240PC

onsemiIn Stock: 168374ACTQ240PC Datasheet

Current PartRFQ

CD74ACT240E

Harris CorporationIn Stock: 4030CD74ACT240E Datasheet

Parametric EquivalentRFQ

SN74ACT240N

Texas InstrumentsIn Stock: 66079SN74ACT240N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACTQ240PC are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

• Logic Type: Buffer, Inverting (identical function)
• Number of Elements: 2 (identical configuration)
• Number of Bits per Element: 4 (identical configuration)
• Output Type: 3-State (identical output capability)
• Current - Output High, Low: 24mA, 24mA (identical drive capability)
• Voltage - Supply: 4.5V ~ 5.5V (identical supply range)
• Operating Temperature: -40°C ~ 85°C (TA) (identical operating range)
• Mounting Type: Through Hole (identical mounting method)
• Package / Case: 20-DIP (0.300", 7.62mm) (identical physical form factor)
• Supplier Device Package: 20-PDIP (identical package designation)

All substitute parts listed below meet these criteria without exception.

Parameter Comparison

Engineering Selection Recommendations

The SN74ACT240N manufactured by Texas Instruments is the primary substitute for the 74ACTQ240PC. This part maintains active product status and carries ROHS3 compliance certification, providing long-term availability and regulatory alignment for new designs and production continuity.

The CD74ACT240E manufactured by Harris Corporation is a secondary substitute option. This part is classified as obsolete and carries RoHS non-compliant status, limiting its suitability for applications requiring regulatory compliance or extended procurement windows.

Both substitute parts satisfy all electrical and mechanical parameters required for direct replacement in applications currently utilizing the 74ACTQ240PC.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT240N directly replace the 74ACTQ240PC in existing designs?

A: Yes. The SN74ACT240N matches all electrical parameters (logic type, element count, bit configuration, output type, current ratings, supply voltage, and operating temperature) and physical specifications (20-DIP package, through-hole mounting) required for direct substitution.

Q: What is the difference between the CD74ACT240E and SN74ACT240N substitutes?

A: Both parts are electrically and mechanically equivalent to the 74ACTQ240PC. The SN74ACT240N carries active product status and ROHS3 compliance, while the CD74ACT240E is obsolete and RoHS non-compliant. For new designs and long-term availability, the SN74ACT240N is the preferred choice.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use the identical 20-DIP (0.300", 7.62mm) package with 20-PDIP supplier designation, ensuring mechanical and electrical compatibility without PCB modifications.

Q: What output current capability should be expected from substitute parts?

A: All substitute parts deliver 24mA output current for both high and low states, matching the 74ACTQ240PC specification.

Q: Are substitute parts suitable for the full operating temperature range of the original part?

A: Yes. All substitute parts operate across the identical -40°C to 85°C (TA) temperature range specified for the 74ACTQ240PC.