TL16C451FN UART Interface IC - Equivalent & Substitute Parts

Part Overview

The TL16C451FN is a single-channel asynchronous communication element manufactured by Texas Instruments, designed for printer port applications. This 68-PLCC surface mount IC operates within a 4.75V to 5.25V supply voltage range and includes modem control functionality. The device is currently in Last Time Buy status, indicating end-of-life production. Identifying qualified substitute components is necessary to ensure design continuity and maintain supply chain reliability for applications requiring UART interface functionality.

Substiute Parts

TL16C451FN

Texas InstrumentsIn Stock: 2203TL16C451FN Datasheet

Current PartRFQ

TL16C750EPFBR

Texas InstrumentsIn Stock: 3352TL16C750EPFBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL16C451FN is determined by the following critical parameters:

• Single UART channel requirement
• Modem control functionality support
• Surface mount technology compatibility
• RoHS3 compliance certification
• Voltage supply specifications and operating ranges

The TL16C750EPFBR qualifies as a manufacturer-recommended substitute based on functional equivalence in UART channel count, modem control capability, and regulatory compliance. While package geometry differs (48-TQFP versus 68-LCC), both devices provide single-channel UART interface functionality with modem control support required for printer port applications.

Parameter Comparison

Engineering Selection Recommendations

The TL16C750EPFBR is designated as the manufacturer-recommended substitute for the TL16C451FN. Both devices maintain ROHS3 compliance and are manufactured by Texas Instruments. The substitute part is in Active product status, ensuring continued availability and support compared to the Last Time Buy status of the original component.

Selection of the TL16C750EPFBR requires design-level evaluation of package footprint compatibility and voltage supply requirements. The substitute operates across multiple voltage ranges (1.62V to 3.6V) compared to the original 5V specification, necessitating circuit design verification to confirm suitability for the target application.

Frequently Asked Questions (FAQ)

Q: Can the TL16C750EPFBR directly replace the TL16C451FN without PCB redesign?

A: Both devices provide single-channel UART functionality with modem control support. However, package geometry differs significantly (48-TQFP versus 68-LCC), requiring PCB footprint modification and layout redesign.

Q: What are the primary differences between these UART interface ICs?

A: The TL16C750EPFBR includes a 128-byte FIFO buffer, internal oscillator, and support for RS232/RS485 protocols with IrDA encoder/decoder capability. The TL16C451FN operates at fixed 5V supply voltage, while the substitute supports multiple lower voltage ranges.

Q: Are both parts RoHS compliant?

A: Yes, both the TL16C451FN and TL16C750EPFBR maintain ROHS3 compliance certification.

Q: What supply voltage considerations apply when substituting these parts?

A: The original TL16C451FN requires 4.75V to 5.25V supply voltage. The TL16C750EPFBR operates at 1.62V to 3.6V across multiple voltage bands. Circuit design must accommodate the substitute's lower voltage specifications.

Q: Is the TL16C750EPFBR available in the same packaging as the original part?

A: No. The TL16C451FN uses 68-LCC (J-Lead) packaging, while the TL16C750EPFBR is supplied in 48-TQFP (7x7) packaging. PCB redesign is required for substitution.