SN74HCT240PWR Equivalent & Substitute Parts

Part Overview

The SN74HCT240PWR is a logic buffer integrated circuit manufactured by Texas Instruments, classified as a Buffer, Inverting device with 2 elements and 4 bits per element. This component features 3-state output capability and operates across a 4.5V to 5.5V supply voltage range. The device is housed in a 20-TSSOP surface mount package and maintains active product status with full RoHS3 compliance.

Substitute parts become necessary when the primary part experiences inventory constraints, packaging format requirements differ between applications, or when alternative manufacturers offer equivalent electrical and mechanical specifications. The SN74HCT240PWR is available in Cut Tape packaging; equivalent devices in alternative packaging formats or from different manufacturers may be required for specific procurement or assembly workflows.

Substiute Parts

SN74HCT240PWR

Texas InstrumentsIn Stock: 65948SN74HCT240PWR Datasheet

Current PartRFQ

SN74HCT240PWT

Texas InstrumentsIn Stock: 1408SN74HCT240PWT Datasheet

Parametric EquivalentRFQ

74HCT240PW,118

NXP USA Inc.In Stock: 313474HCT240PW,118 Datasheet

MFR RecommendedRFQ

MM74HCT240MTCX

Fairchild SemiconductorIn Stock: 6770MM74HCT240MTCX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HCT240PWR is determined by strict parametric equivalence across the following criteria:

Core Electrical Parameters: Logic type (Buffer, Inverting), number of elements (2), bits per element (4), output type (3-State), output current capability (6mA minimum for both high and low states), and supply voltage range (4.5V ~ 5.5V).

Mechanical Compatibility: Package type (20-TSSOP), physical dimensions (0.173" width, 4.40mm), and surface mount mounting type.

Compliance & Status: RoHS3 compliance and active or recently discontinued product status.

Parts meeting these criteria are classified as parametric equivalents regardless of manufacturer or packaging format variation (Cut Tape versus Tape & Reel). Operating temperature range may extend beyond the primary part specification without affecting substitution eligibility, provided the minimum range encompasses the primary device's operating window.

Parameter Comparison

Engineering Selection Recommendations

SN74HCT240PWT (Texas Instruments): This device is parametrically equivalent to the SN74HCT240PWR with identical electrical specifications and operating temperature range. The primary distinction is packaging format (Tape & Reel versus Cut Tape). This part is discontinued at DiGi Electronics; selection should be based on inventory availability and packaging requirements for assembly processes.

74HCT240PW,118 (NXP USA Inc.): This NXP-manufactured device meets all core electrical and mechanical substitution criteria. The extended operating temperature range (-40°C ~ 125°C) provides additional thermal margin beyond the primary part specification. This part maintains active product status and is suitable for applications requiring long-term component availability.

MM74HCT240MTCX (Fairchild Semiconductor): This Fairchild device provides parametric equivalence with a higher output current specification (7.2mA versus 6mA). The increased current capability ensures compatibility with applications requiring maximum drive strength. This part maintains active product status and is available in inventory.

Selection among these substitutes should prioritize active product status, long-term availability, and packaging format compatibility with existing assembly workflows. The MM74HCT240MTCX offers enhanced current capability suitable for demanding load conditions.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCT240PWT replace the SN74HCT240PWR in production?

A: Yes. Both devices are manufactured by Texas Instruments and share identical electrical specifications, operating temperature range, and 20-TSSOP package dimensions. The difference is packaging format: SN74HCT240PWR is supplied in Cut Tape, while SN74HCT240PWT is supplied in Tape & Reel. Compatibility depends on assembly equipment capability to process the respective packaging format.

Q: Is the NXP 74HCT240PW,118 a direct substitute?

A: Yes. This device meets all core electrical and mechanical requirements. The extended operating temperature range (-40°C ~ 125°C) is a superset of the primary part's range and does not affect substitution eligibility. Verify RoHS compliance requirements for your specific application.

Q: What is the significance of the higher output current in the MM74HCT240MTCX?

A: The MM74HCT240MTCX provides 7.2mA output current versus 6mA in the primary part. This higher current capability ensures adequate drive strength for applications with heavier load conditions or longer signal traces. The device remains parametrically equivalent and is suitable for direct substitution.

Q: Are all substitute parts available in the same 20-TSSOP package?

A: Yes. All listed substitute parts use the identical 20-TSSOP package with 0.173" width and 4.40mm dimensions. Physical footprint compatibility is maintained across all devices, allowing direct PCB layout reuse.

Q: What compliance certifications apply to these substitute parts?

A: The SN74HCT240PWR and SN74HCT240PWT are ROHS3 compliant. Compliance documentation for the NXP and Fairchild devices should be verified through manufacturer datasheets for specific application requirements.