SC16C550IA44,529 Equivalent & Substitute Parts

Part Overview

The SC16C550IA44,529 is a single-channel UART interface IC with 16-byte FIFO, manufactured by NXP USA Inc. in a 44-PLCC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs, maintenance, and production continuity. The part supports multiple supply voltages (2.5V, 3.3V, 5V), includes auto flow control, IrDA encoder/decoder functionality, and false start bit detection capabilities.

Substiute Parts

SC16C550IA44,529

NXP USA Inc.In Stock: 1214SC16C550IA44,529 Datasheet

Current PartRFQ

ST16C550CJ44-F

MaxLinear, Inc.In Stock: 1618ST16C550CJ44-F Datasheet

MFR RecommendedRFQ

ST16C550IJ44-F

MaxLinear, Inc.In Stock: 4323ST16C550IJ44-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC16C550IA44,529 are qualified based on the following critical parameters:

• Package Compatibility: 44-PLCC (16.59x16.59) surface mount package
• Functional Equivalence: Single UART channel with 16-byte FIFO
• Interface Features: Modem control and false start bit detection
• Electrical Compatibility: Supply voltage range supporting 2.5V, 3.3V, and 5V operation
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute parts ST16C550CJ44-F and ST16C550IJ44-F meet these core substitution criteria. Both are manufactured by MaxLinear, Inc., maintain the identical package footprint, support single UART channel operation with 16-byte FIFO, include modem control and false start bit detection, and comply with ROHS3 and REACH requirements. These parts are currently in active production status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

Both ST16C550CJ44-F and ST16C550IJ44-F are suitable substitutes for the obsolete SC16C550IA44,529. Selection between the two substitute parts should be based on inventory availability and procurement requirements, as both maintain identical electrical and mechanical specifications.

The substitute parts offer improved moisture sensitivity characteristics (MSL 1 vs. MSL 3), providing enhanced reliability in storage and handling. Both parts maintain active production status, ensuring consistent availability and long-term supply chain stability. ROHS3 compliance and REACH unaffected status are maintained across all three parts, supporting regulatory requirements.

The maximum data rate of the substitute parts (1.5 Mbps) is lower than the original part (3 Mbps). Applications requiring data rates exceeding 1.5 Mbps must evaluate this specification difference against system requirements.

Frequently Asked Questions (FAQ)

Q: Are ST16C550CJ44-F and ST16C550IJ44-F pin-compatible with SC16C550IA44,529?

A: Yes. Both substitute parts use the identical 44-PLCC (16.59x16.59) package with 44-LCC J-Lead configuration, ensuring direct pin-for-pin compatibility and identical PCB footprint.

Q: What is the primary difference between the two substitute parts?

A: ST16C550CJ44-F and ST16C550IJ44-F are functionally equivalent. Both maintain identical electrical specifications, package configuration, and feature set. Selection should be based on inventory availability and procurement lead times.

Q: Does the lower maximum data rate of substitute parts affect compatibility?

A: The substitute parts support 1.5 Mbps maximum data rate compared to 3 Mbps for the original part. Applications operating at or below 1.5 Mbps experience no functional impact. Systems requiring higher data rates must evaluate alternative solutions.

Q: Are the substitute parts suitable for new designs?

A: Yes. Both ST16C550CJ44-F and ST16C550IJ44-F are in active production status and carry current ROHS3 compliance and REACH unaffected certifications, making them appropriate for new product development.

Q: What is the significance of the improved MSL rating?

A: The substitute parts carry MSL 1 (Unlimited) compared to MSL 3 (168 Hours) for the original part. This indicates superior moisture resistance and reduced sensitivity to humidity during storage and handling, improving component reliability.

Q: Can both substitute parts operate across the full voltage range of the original part?

A: The substitute parts operate across 2.97V to 5.5V, which encompasses the 2.5V, 3.3V, and 5V supply voltages of the original part. The 2.97V minimum specification is slightly higher than the original 2.5V minimum, requiring verification for applications operating below 2.97V.