N74F240D,623 Equivalent & Substitute Parts

Part Overview

The N74F240D,623 is a Buffer, Inverting logic IC manufactured by NXP USA Inc., featuring 2 elements with 4 bits per element and 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

N74F240D,623

NXP USA Inc.In Stock: 766N74F240D,623 Datasheet

Current PartRFQ

SN74F240DW

Texas InstrumentsIn Stock: 1521SN74F240DW Datasheet

MFR RecommendedRFQ

SN74AS240ADWR

Texas InstrumentsIn Stock: 2865SN74AS240ADWR Datasheet

Parametric EquivalentRFQ

SN74F240DWR

Texas InstrumentsIn Stock: 2153SN74F240DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the N74F240D,623 are qualified based on the following critical parameters that must remain constant:

• Logic Type: Buffer, Inverting
• Number of Elements: 2
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 15mA, 64mA
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

All identified substitutes maintain these electrical and mechanical specifications, ensuring functional compatibility within the original design parameters.

Parameter Comparison

Engineering Selection Recommendations

SN74F240DW (Texas Instruments) — Manufacturer-recommended substitute with Last Time Buy status. Maintains identical electrical specifications and 20-SOIC package configuration. Suitable for immediate replacement in existing designs.

SN74F240DWR (Texas Instruments) — Parametric equivalent with Active product status, ensuring long-term availability. Identical electrical and mechanical specifications to the original part. Recommended for new production and long-lifecycle applications.

SN74AS240ADWR (Texas Instruments) — Parametric equivalent with Active product status. Operates within the same electrical envelope and package footprint. The 74AS series represents an alternative logic family within the same functional class. Suitable for applications requiring extended component lifecycle support.

Frequently Asked Questions (FAQ)

Q: Can SN74F240DW be used as a direct replacement for N74F240D,623?

A: Yes. The SN74F240DW maintains identical electrical specifications (4.5V–5.5V supply, 15mA/64mA output current, 0°C–70°C operating range) and package configuration (20-SOIC). Pin-for-pin compatibility is assured.

Q: What is the difference between the 74F and 74AS logic families?

A: Both families meet the specified electrical parameters for this application. The 74AS series (SN74AS240ADWR) is an alternative logic family. Selection between 74F and 74AS should be based on design requirements and component availability.

Q: Why is the original N74F240D,623 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by NXP USA Inc. The identified substitutes from Texas Instruments provide functional equivalence and ensure design continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitutes carry ROHS3 Compliant certification, matching the original part's environmental compliance status.

Q: Does package footprint remain identical across all substitutes?

A: Yes. All substitutes use the 20-SOIC (0.295", 7.50mm Width) package, ensuring PCB layout compatibility without modification.

Q: Which substitute offers the longest product lifecycle?

A: SN74F240DWR and SN74AS240ADWR both carry Active product status, indicating ongoing manufacturing and availability. SN74F240DW is classified as Last Time Buy, indicating limited future availability.