74AC16244SSCX Equivalent & Substitute Parts

Part Overview

The 74AC16244SSCX is a Buffer, Non-Inverting logic IC manufactured by onsemi, featuring 4 elements with 4 bits per element and 3-state output capability. This component operates across a 2V to 6V supply voltage range and is housed in a 48-BSSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74AC16244SSCX

onsemiIn Stock: 238374AC16244SSCX Datasheet

Current PartRFQ

74AC16244DGGR

Texas InstrumentsIn Stock: 151174AC16244DGGR Datasheet

SimilarRFQ

74AC16244DL

Texas InstrumentsIn Stock: 64774AC16244DL Datasheet

SimilarRFQ

74AC16244DLR

Texas InstrumentsIn Stock: 1602974AC16244DLR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC16244SSCX is determined by the following critical parameters:

Core Functional Requirements:

• Logic type: Buffer, Non-Inverting
• Number of elements: 4
• Bits per element: 4
• Output type: 3-State
• Output current capability: 24mA (high and low)
• Series: 74AC

Electrical Compatibility:

• Supply voltage range must encompass or overlap with the original 2V ~ 6V specification
• Operating temperature range: -40°C ~ 85°C (TA)

Physical Compatibility:

• Mounting type: Surface Mount
• Package footprint: 48-pin SSOP or TSSOP variants with compatible pinout

All identified substitute parts maintain identical logic functionality, output drive capability, and thermal operating range. Voltage supply ranges differ slightly across substitutes but remain within acceptable overlap for most applications. Package variants (SSOP vs. TSSOP) are mechanically compatible with standard PCB layouts designed for 48-pin SSOP footprints.

Parameter Comparison

Engineering Selection Recommendations

74AC16244DLR (Texas Instruments) - Primary Substitute

The 74AC16244DLR is the recommended primary substitute. It maintains active product status with the highest available inventory (15,981 pcs), ensuring long-term supply continuity. The part is ROHS3 compliant and housed in the identical 48-BSSOP package footprint as the original onsemi component. Supply voltage range (3V ~ 5.5V) overlaps with the original specification across standard logic operating conditions. Tape & Reel packaging supports automated assembly processes.

74AC16244DL (Texas Instruments) - Secondary Substitute

The 74AC16244DL provides an alternative with identical package geometry (48-BSSOP) and electrical specifications. However, this part carries Last Time Buy status, indicating limited future availability. Use only when 74AC16244DLR inventory is unavailable and immediate procurement is required.

74AC16244DGGR (Texas Instruments) - Package Variant Substitute

The 74AC16244DGGR is functionally equivalent but uses a 48-TFSOP package (0.240" width) instead of the standard 48-BSSOP (0.295" width). This narrower package variant requires PCB layout modification and is suitable only for new designs or redesigns where footprint adjustment is feasible. Active product status and ROHS3 compliance support long-term availability.

Frequently Asked Questions (FAQ)

Q: Can 74AC16244DLR directly replace 74AC16244SSCX without PCB modification?

A: Yes. The 74AC16244DLR uses the identical 48-BSSOP package footprint (0.295", 7.50mm width) as the original onsemi part. Pinout and electrical characteristics are compatible. No PCB layout changes are required.

Q: What is the voltage supply difference between the original and substitute parts?

A: The original 74AC16244SSCX operates from 2V to 6V. Texas Instruments substitutes operate from 3V to 5.5V. The overlap range (3V ~ 5.5V) covers standard logic supply voltages (3.3V, 5V). Applications requiring operation below 3V or above 5.5V cannot use the TI substitutes.

Q: Why does 74AC16244DGGR have a different package width?

A: The 74AC16244DGGR uses a 48-TFSOP package (0.240" width) versus the standard 48-BSSOP (0.295" width). Both are 48-pin SSOP-family packages with identical pinout, but the TFSOP variant is physically narrower. Existing PCB designs require footprint modification to accommodate this package.

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

A: The 74AC16244DL carries Last Time Buy status, indicating limited remaining inventory and no future production. It is suitable only for legacy system support or immediate short-term needs. For new designs, use 74AC16244DLR (active status).

Q: Are all substitutes RoHS compliant?

A: All Texas Instruments substitutes (74AC16244DGGR, 74AC16244DL, 74AC16244DLR) are ROHS3 compliant. The original onsemi part RoHS status is not specified in available documentation.

Q: What is the difference between Tape & Reel and Tube packaging?

A: Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly and high-volume production. Tube packaging is suitable for manual assembly or lower-volume applications. Both packaging formats contain identical components; the difference is in handling and assembly methodology.

Q: Can I use 74AC16244DGGR in a design originally specified for 74AC16244SSCX?

A: Electrically and functionally, yes. However, the narrower 48-TFSOP package requires PCB footprint redesign. Use only if PCB modification is acceptable. For direct drop-in replacement without layout changes, use 74AC16244DLR or 74AC16244DL instead.