TL16C552AFN Equivalent & Substitute Parts

Part Overview

The TL16C552AFN is a dual-channel asynchronous communication element (UART IC) manufactured by Texas Instruments, housed in a 68-PLCC surface mount package. This interface component provides 16-byte FIFO buffers per channel with modem control and false start bit detection capabilities, operating at a maximum data rate of 1 Mbps. The main part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and procurement flexibility for applications requiring this dual UART functionality.

Substiute Parts

TL16C552AFN

Texas InstrumentsIn Stock: 1821TL16C552AFN Datasheet

Current PartRFQ

TL16C552AFNG4

Texas InstrumentsIn Stock: 837TL16C552AFNG4 Datasheet

Parametric EquivalentRFQ

TL16C552FN

Texas InstrumentsIn Stock: 2302TL16C552FN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL16C552AFN are determined by strict equivalence across the following critical parameters:

• Number of Channels: 2 (DUART configuration)
• FIFO Capacity: 16 Byte per channel
• Data Rate: 1 Mbps maximum
• Supply Voltage Range: 4.75V ~ 5.25V
• Package Type: 68-PLCC (24.23x24.23) surface mount
• Mounting Type: Surface Mount
• Functional Features: Modem control and false start bit detection

All identified substitute parts maintain identical electrical and mechanical specifications across these parameters. Substitutes are grouped based on their base product number (TL16C552) and variant designations, which indicate manufacturing process or packaging date code variations rather than functional differences.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TL16C552AFN, TL16C552AFNG4, and TL16C552FN—are functionally equivalent and interchangeable at the electrical and mechanical level. Selection should be based on the following factors:

Product Status Consideration: TL16C552AFN and TL16C552FN are both classified as Last Time Buy, indicating limited future procurement windows. TL16C552AFNG4 is marked Obsolete and should be avoided for new designs or long-term production requirements.

Compliance and Certification: All three parts maintain ROHS3 compliance and identical MSL ratings (3, 168 Hours), meeting standard environmental and handling requirements for surface mount assembly.

Inventory Availability: TL16C552FN offers the highest current stock level (2287 Pcs), followed by TL16C552AFN (1716 Pcs). For immediate procurement needs, TL16C552FN is the preferred choice. TL16C552AFNG4 has lower availability (802 Pcs) and obsolete status.

Recommended Primary Selection: TL16C552FN for new procurement and design continuity.

Frequently Asked Questions (FAQ)

Q: Are TL16C552AFN, TL16C552AFNG4, and TL16C552FN pin-for-pin compatible?

A: Yes. All three parts use the identical 68-PLCC (24.23x24.23) package with the same pin configuration, electrical characteristics, and functional features. They are direct pin-for-pin substitutes.

Q: What does the suffix difference (AFN, AFNG4, FN) indicate?

A: The suffix designations represent manufacturing process variants or date code groupings within the TL16C552 product family. These do not affect electrical performance or functional capability. All variants maintain identical specifications for channels, FIFO capacity, data rate, and supply voltage.

Q: Can I use TL16C552AFNG4 as a substitute despite its Obsolete status?

A: TL16C552AFNG4 is electrically and mechanically equivalent and will function identically in the application. However, its Obsolete classification indicates no future manufacturing or support from Texas Instruments. For designs requiring long-term component availability or future production runs, TL16C552FN or TL16C552AFN are more appropriate choices.

Q: What are the critical parameters that must match for substitution?

A: The following parameters must remain identical for valid substitution: dual-channel UART configuration, 16-byte FIFO per channel, 1 Mbps maximum data rate, 4.75V–5.25V supply voltage range, 68-PLCC surface mount package, modem control capability, and false start bit detection. All identified substitutes meet these requirements.

Q: Are there any differences in handling or storage requirements between these parts?

A: No. All three parts share identical MSL ratings (3, 168 Hours) and RoHS compliance status, requiring the same moisture control and storage protocols during assembly and handling.

Q: Which part should I select for a new design?

A: TL16C552FN is recommended for new designs due to its Last Time Buy status, highest current inventory availability (2287 Pcs), and equivalent performance to the main part number.