74AC16244SSC Equivalent & Substitute Parts

Part Overview

The 74AC16244SSC is a non-inverting buffer IC with 4 elements, 4 bits per element, and 3-state output capability. Manufactured by onsemi in a 48-SSOP package, this logic component operates across a 2V to 6V supply voltage range with 24mA output current capability. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74AC16244SSC

onsemiIn Stock: 124574AC16244SSC Datasheet

Current PartRFQ

74AC16244DL

Texas InstrumentsIn Stock: 64774AC16244DL Datasheet

DirectRFQ

74AC16244DGGR

Texas InstrumentsIn Stock: 151174AC16244DGGR Datasheet

SimilarRFQ

74AC16244DLR

Texas InstrumentsIn Stock: 1602974AC16244DLR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74AC16244SSC are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine substitution eligibility:

Core Functional Parameters (Must Match):

• Logic Type: Buffer, Non-Inverting
• Number of Elements: 4
• Number of Bits per Element: 4
• Output Type: 3-State
• Current - Output High, Low: 24mA, 24mA
• Operating Temperature: -40°C ~ 85°C (TA)
• Series: 74AC

Electrical Compatibility Parameter:

• Voltage - Supply: The main part operates at 2V ~ 6V. Substitute parts operating at 3V ~ 5.5V are compatible, as this range is a subset of the original specification and maintains functional operation within the overlapping voltage window.

Mechanical Compatibility Parameters:

• Mounting Type: Surface Mount (all candidates match)
• Package options: 48-BSSOP or 48-TSSOP packages are mechanically compatible with the original 48-BSSOP footprint for 48-BSSOP variants; 48-TSSOP represents a different footprint width (0.240" vs 0.295") and requires PCB layout verification.

Packaging Format:

• Tube and Tape & Reel (TR) packaging formats are functionally equivalent to the original packaging and do not affect component performance.

Parameter Comparison

Engineering Selection Recommendations

74AC16244DLR (Texas Instruments) - Recommended Primary Substitute

The 74AC16244DLR is the optimal substitute for the obsolete 74AC16244SSC. This part maintains identical electrical specifications (24mA output current, 3-state output, 4 elements × 4 bits configuration) and operates within the compatible voltage range of 3V ~ 5.5V. The 48-BSSOP package footprint is mechanically identical to the original, enabling direct PCB replacement without layout modifications. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Inventory availability is substantial at 15,981 pieces.

74AC16244DL (Texas Instruments) - Secondary Substitute

The 74AC16244DL provides equivalent electrical functionality with identical package footprint (48-BSSOP). This part is classified as Last Time Buy, indicating limited future availability. It is suitable for applications where existing inventory must be consumed before transitioning to active production alternatives.

74AC16244DGGR (Texas Instruments) - Package Variant

The 74AC16244DGGR offers identical electrical specifications but uses a 48-TFSOP package (0.240" width) instead of the 48-BSSOP (0.295" width). This footprint difference requires PCB layout verification and potential redesign. This option is suitable only when PCB layout accommodates the narrower package width or when redesign is feasible. The part is in active production with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the 74AC16244DLR directly replace the 74AC16244SSC without PCB modifications?

A: Yes. The 74AC16244DLR uses the identical 48-BSSOP package footprint (0.295", 7.50mm width) as the original 74AC16244SSC. Direct PCB replacement is possible without layout changes.

Q: Why is the voltage supply range different (2V ~ 6V vs 3V ~ 5.5V)?

A: The Texas Instruments substitutes operate at 3V ~ 5.5V, which is a subset of the original 2V ~ 6V range. For applications operating within the 3V ~ 5.5V window, these substitutes are fully compatible. Applications requiring operation below 3V or above 5.5V cannot use these substitutes.

Q: What is the difference between 74AC16244DLR and 74AC16244DGGR?

A: Both parts have identical electrical specifications. The primary difference is packaging: 74AC16244DLR uses 48-BSSOP (0.295" width), while 74AC16244DGGR uses 48-TFSOP (0.240" width). The DGGR variant requires PCB layout verification due to the narrower footprint.

Q: Is the 74AC16244DL still available for new designs?

A: The 74AC16244DL is classified as Last Time Buy, indicating limited future availability. For new designs, the 74AC16244DLR (active production status) is the recommended choice.

Q: Are all substitute parts RoHS compliant?

A: Yes. All Texas Instruments substitutes (74AC16244DL, 74AC16244DLR, 74AC16244DGGR) are ROHS3 compliant. The original onsemi part does not specify RoHS status.

Q: Can I use the 74AC16244DGGR if my PCB is designed for 48-BSSOP?

A: No. The 74AC16244DGGR uses a 48-TFSOP package with a different footprint width (0.240" vs 0.295"). PCB layout modifications are required. Verify pad spacing and trace routing compatibility before substitution.

Q: What is the moisture sensitivity level for these parts?

A: All parts, including the original and all substitutes, have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.