74ACT11240DBR Equivalent & Substitute Parts

Part Overview

The 74ACT11240DBR is a Buffer, Inverting logic IC featuring 2 elements with 4 bits per element and 3-state output capability. Manufactured by Texas Instruments in a 24-SSOP surface mount package, this component operates across a 4.5V to 5.5V supply voltage range with ±24mA output current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

74ACT11240DBR

Texas InstrumentsIn Stock: 117774ACT11240DBR Datasheet

Current PartRFQ

74AC11240DBR

Texas InstrumentsIn Stock: 93674AC11240DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT11240DBR is determined by strict equivalence across the following critical parameters:

• Logic function: Buffer, Inverting configuration with identical 2-element, 4-bit-per-element architecture
• Output characteristics: 3-state output with matching 24mA drive capability
• Package form factor: 24-SSOP surface mount package with identical 0.209" (5.30mm) width
• Operating temperature range: -40°C to 85°C
• Output current specifications: 24mA high and low output current

The 74AC11240DBR qualifies as a direct substitute based on functional equivalence and package compatibility. The primary distinction lies in supply voltage range and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The 74AC11240DBR is the qualified substitute for the obsolete 74ACT11240DBR. Both parts maintain identical functional specifications, output drive capability, and package geometry. The 74AC11240DBR offers extended lower supply voltage operation (3V minimum versus 4.5V minimum), providing additional design flexibility while maintaining full compatibility at the 4.5V to 5.5V operating range of the original part.

The 74AC11240DBR carries active product status with ROHS3 compliance and REACH unaffected classification, ensuring long-term availability and regulatory alignment for production applications. Selection of the 74AC11240DBR eliminates obsolescence risk while preserving electrical and mechanical interchangeability.

Frequently Asked Questions (FAQ)

Q: Are the 74ACT11240DBR and 74AC11240DBR pin-for-pin compatible?

A: Yes. Both parts use the 24-SSOP package with identical pinout, enabling direct socket substitution without PCB modification.

Q: What is the primary difference between these parts?

A: The 74AC11240DBR supports a lower minimum supply voltage (3V) compared to the 74ACT11240DBR (4.5V). At the 4.5V to 5.5V operating range, both parts are functionally equivalent. The 74AC11240DBR is active production status while the 74ACT11240DBR is obsolete.

Q: Can the 74AC11240DBR be used in designs originally specified for the 74ACT11240DBR?

A: Yes, provided the circuit operates within the 4.5V to 5.5V supply voltage range. The 74AC11240DBR maintains identical output current, logic function, and thermal operating specifications.

Q: What packaging options are available for the 74AC11240DBR?

A: The 74AC11240DBR is supplied in Tape & Reel (TR) packaging in the 24-SSOP form factor, standard for surface mount production assembly.

Q: Are both parts RoHS compliant?

A: Yes. Both the 74ACT11240DBR and 74AC11240DBR are ROHS3 compliant and REACH unaffected.