PC16552DVX Equivalent & Substitute Parts

Part Overview

The PC16552DVX is a dual UART interface IC manufactured by Texas Instruments, featuring dual asynchronous communication channels with 16-byte FIFO buffers. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing system support and new designs. The part operates at 5V supply voltage and supports data rates up to 1.5 Mbps with modem control and false start bit detection capabilities. Due to its obsolete status, alternative components with compatible electrical and mechanical specifications are required for procurement and design continuity.

Substiute Parts

PC16552DVX

Texas InstrumentsIn Stock: 1727PC16552DVX Datasheet

Current PartRFQ

TL16C552AFNR

Texas InstrumentsIn Stock: 2054TL16C552AFNR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PC16552DVX is based on the following critical parameters that must align for functional compatibility:

• Dual Channel UART Architecture: Both the main part and substitute must provide 2 DUART channels with 16-byte FIFO buffers
• Modem Control Support: False start bit detection and modem control capabilities must be present
• Surface Mount Technology: Package must be surface-mount compatible
• Supply Voltage Compatibility: Operating voltage must support the system's 5V rail or be compatible through voltage regulation
• Data Rate Capability: Maximum data rate must meet or exceed 1.5 Mbps requirement

The TL16C552AFNR qualifies as a substitute based on these core electrical parameters, though package geometry differs due to enhanced feature integration and active product status.

Parameter Comparison

Engineering Selection Recommendations

The TL16C552AFNR serves as the primary substitute for the obsolete PC16552DVX based on the following engineering criteria:

Product Status and Availability: The TL16C552AFNR maintains active manufacturing status with documented inventory availability, ensuring long-term procurement viability compared to the obsolete PC16552DVX.

Regulatory Compliance: The substitute achieves ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original part is non-compliant with modern standards.

Electrical Compatibility: Both components provide identical dual-channel UART architecture with 16-byte FIFO buffers, modem control, and false start bit detection. The substitute operates within a 4.75V to 5.25V range, providing improved voltage tolerance for 5V systems.

Package Consideration: The substitute uses a 68-pin LCC package compared to the original 44-pin package. PCB redesign is required to accommodate the different footprint and pin configuration. The increased pin count reflects enhanced integration and additional features in the active product line.

Data Rate: The substitute supports a maximum data rate of 1 Mbps, which is lower than the original 1.5 Mbps specification. System designs operating below 1 Mbps will experience no functional limitation.

Frequently Asked Questions (FAQ)

Q: Can the TL16C552AFNR directly replace the PC16552DVX without PCB modification?

A: No. The TL16C552AFNR uses a 68-pin LCC package versus the 44-pin LCC package of the PC16552DVX. PCB redesign is required to accommodate the different footprint, pin count, and pinout configuration.

Q: What is the primary reason for substitution?

A: The PC16552DVX is obsolete and no longer manufactured. The TL16C552AFNR is the active equivalent from the same manufacturer with compatible core functionality.

Q: Are the UART channels and FIFO specifications identical?

A: Yes. Both parts provide 2 DUART channels with 16-byte FIFO buffers, modem control, and false start bit detection.

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

A: The substitute supports 1 Mbps maximum data rate versus 1.5 Mbps for the original. Systems designed for operation below 1 Mbps will function without limitation. Systems requiring 1.5 Mbps operation require alternative solutions.

Q: What are the voltage supply differences?

A: The original part operates at 5V nominal. The substitute operates across 4.75V to 5.25V, providing wider tolerance for 5V supply rails.

Q: Is the substitute RoHS compliant?

A: Yes. The TL16C552AFNR is ROHS3 compliant, meeting current environmental standards. The original PC16552DVX is non-compliant.

Q: What is the moisture sensitivity difference?

A: The original part has MSL 2A (4 weeks storage limit). The substitute has MSL 3 (168 hours storage limit), indicating improved moisture tolerance for handling and storage.