SC16C554IB80 Equivalent & Substitute Parts

Part Overview

The SC16C554IB80 is a quad UART interface IC with 16-byte FIFO buffers, manufactured by NXP Semiconductors. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new designs. The part operates across multiple voltage supplies (2.5V, 3.3V, 5V) and supports advanced features including auto flow control, IrDA encoding/decoding, false start bit detection, and modem control signaling. Surface mount packaging in 80-LQFP form factor enables integration into compact electronic assemblies.

Substiute Parts

SC16C554IB80,551

NXP SemiconductorsIn Stock: 907SC16C554IB80,551 Datasheet

Current PartRFQ

TL16C554APN

Texas InstrumentsIn Stock: 2262TL16C554APN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SC16C554IB80 is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Number of channels: 4 QUART channels
• FIFO depth: 16 Byte
• Package type: 80-LQFP (12x12)
• Mounting type: Surface Mount
• Modem control support: Yes
• False start bit detection: Yes

Acceptable Variation Parameters:

• Data rate maximum: The substitute may operate at a lower maximum data rate provided it meets application requirements
• Voltage supply range: The substitute voltage range must encompass the operating voltages required by the system
• IrDA encoder/decoder: This feature may be absent in substitutes if not required by the application
• Product status: Active status substitutes are preferred for long-term availability

The TL16C554APN from Texas Instruments qualifies as a substitute based on matching core channel count, FIFO depth, package geometry, and essential control features. Differences in maximum data rate (1 Mbps vs. 5 Mbps) and IrDA capability do not preclude substitution when application bandwidth requirements are within the substitute's specification.

Parameter Comparison

Engineering Selection Recommendations

The TL16C554APN is suitable as a substitute for the obsolete SC16C554IB80 in applications where the maximum data rate requirement does not exceed 1 Mbps. Both components maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The Texas Instruments part offers active product status, providing superior long-term availability and supply chain stability compared to the NXP obsolete component.

The voltage supply range of the TL16C554APN (3V to 5.25V) covers the 3.3V and 5V operating points of the SC16C554IB80. Systems requiring 2.5V operation must evaluate alternative substitutes or implement voltage regulation to accommodate the TL16C554APN's minimum 3V threshold.

Both components share identical MSL ratings and package geometry, eliminating the need for PCB redesign or requalification of assembly processes. The absence of IrDA encoder/decoder specification in the TL16C554APN requires verification that the application does not depend on this feature.

Frequently Asked Questions (FAQ)

Q: Can the TL16C554APN directly replace the SC16C554IB80 without PCB modifications?

A: Yes. Both components use identical 80-LQFP (12x12) surface mount packaging with matching pin counts and signal assignments for the four UART channels, auto flow control, modem control, and false start bit detection features. No PCB layout changes are required.

Q: What is the impact of the lower maximum data rate on substitution?

A: The TL16C554APN supports 1 Mbps maximum data rate versus 5 Mbps for the SC16C554IB80. Substitution is valid only when the application's actual data rate requirement does not exceed 1 Mbps. Review system specifications to confirm bandwidth compatibility.

Q: Does the absence of IrDA encoder/decoder in the TL16C554APN affect compatibility?

A: The TL16C554APN datasheet does not specify IrDA encoder/decoder capability. If the original design utilizes this feature, alternative substitutes must be evaluated. If IrDA functionality is not used in the application, this difference does not impact substitution viability.

Q: Are there voltage supply considerations when substituting?

A: The SC16C554IB80 operates at 2.5V, 3.3V, and 5V. The TL16C554APN operates across 3V to 5.25V. Systems using 2.5V supply voltage cannot use the TL16C554APN without additional voltage regulation or alternative component selection.

Q: What is the significance of product status in this substitution?

A: The SC16C554IB80 is obsolete, indicating NXP has discontinued production and support. The TL16C554APN maintains active status, ensuring ongoing availability, technical support, and supply chain continuity for new designs and system maintenance.

Q: Are compliance certifications identical between these components?

A: Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Regulatory requirements for component selection are satisfied by either part. MSL ratings are identical at Level 3 (168 Hours).