74ACT16240MTDX Equivalent & Substitute Parts

Part Overview

The 74ACT16240MTDX is a 4-element, 4-bit inverting buffer IC with 3-state output capability, manufactured by onsemi in a 48-TSSOP package. This logic component operates across a 4.5V to 5.5V supply voltage range and is designed for applications requiring signal buffering and inversion with tri-state control. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74ACT16240MTDX

onsemiIn Stock: 89574ACT16240MTDX Datasheet

Current PartRFQ

74ACT16240DL

Texas InstrumentsIn Stock: 122274ACT16240DL Datasheet

SimilarRFQ

74ACT16240DLR

Texas InstrumentsIn Stock: 150374ACT16240DLR Datasheet

SimilarRFQ

74FCT162240ATPACT

Texas InstrumentsIn Stock: 197974FCT162240ATPACT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT16240MTDX is determined by strict alignment of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Logic Type: Buffer, Inverting (4 element, 4 bit per element configuration)
• Output Type: 3-State
• Output Current: 24mA (both high and low)
• Supply Voltage Range: 4.5V ~ 5.5V
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on package compatibility:

Direct Package Match (48-TFSOP): Parts maintaining identical package geometry and pin configuration, enabling direct PCB-level replacement without layout modification.

Functional Equivalent with Package Variation (48-SSOP): Parts meeting all electrical specifications but utilizing a different surface-mount package (48-BSSOP, 0.295" width vs. 0.240" width). These require PCB footprint adjustment but maintain full functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Replacement (No Layout Modification):

The 74FCT162240ATPACT is the preferred substitute when PCB footprint compatibility is required. This part maintains the identical 48-TFSOP package geometry as the original 74ACT16240MTDX, enabling direct pin-for-pin replacement. Both parts are classified as obsolete; however, the 74FCT162240ATPACT demonstrates higher current inventory availability (1921 pcs vs. 786 pcs) and carries ROHS3 compliance certification.

For Production Continuity with Package Redesign Capability:

The 74ACT16240DLR is the recommended long-term substitute. This part maintains active product status with Texas Instruments, ensuring ongoing availability and supply chain stability. It meets all electrical and thermal specifications of the original part. The 48-BSSOP package requires PCB footprint modification but is a standard surface-mount package with established manufacturing processes. ROHS3 compliance and unlimited moisture sensitivity rating align with modern manufacturing standards.

The 74ACT16240DL offers an intermediate option with last-time-buy status and higher inventory (1132 pcs), suitable for near-term production runs where package redesign is feasible.

Frequently Asked Questions (FAQ)

Q: Can the 74ACT16240DL or 74ACT16240DLR be used as direct replacements for the 74ACT16240MTDX without PCB modification?

A: The 74ACT16240DL and 74ACT16240DLR utilize the 48-BSSOP package (0.295" width), which differs from the original 48-TFSOP package (0.240" width). While pin count and electrical function are identical, the physical package dimensions require PCB footprint redesign. Direct socket replacement is not possible without layout modification.

Q: What is the difference between the 74ACT16240DL and 74ACT16240DLR?

A: Both parts are manufactured by Texas Instruments and share identical electrical specifications and package type (48-BSSOP). The primary difference is packaging format: 74ACT16240DL is supplied in tube packaging, while 74ACT16240DLR is supplied in tape and reel format. The 74ACT16240DLR maintains active product status, whereas the 74ACT16240DL is classified as last-time-buy.

Q: Why is the 74FCT162240ATPACT listed as a substitute if it is also obsolete?

A: The 74FCT162240ATPACT is included as a substitute because it maintains the identical 48-TFSOP package and meets all electrical specifications of the original part. Despite obsolete classification, it offers the advantage of direct PCB compatibility for applications where layout modification is not feasible. Current inventory availability (1921 pcs) supports near-term production requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 74ACT16240DL, 74ACT16240DLR, and 74FCT162240ATPACT all carry ROHS3 compliance certification. The original 74ACT16240MTDX does not specify RoHS status in the provided data.

Q: What are the key electrical parameters that determine substitutability?

A: Substitutability is determined by: logic type (buffer, inverting), element configuration (4 elements, 4 bits per element), output type (3-state), output current capability (24mA high and low), supply voltage range (4.5V ~ 5.5V), and operating temperature range (-40°C ~ 85°C). All listed substitutes meet these criteria.

Q: Can the 74ACT16240MTDX be replaced with a part from a different logic family?

A: No. Substitution is restricted to parts within the 74ACT or 74FCT logic families that maintain identical functional specifications. Cross-family substitution introduces compatibility risks and is not supported by the provided equivalency data.