TL16C450N Equivalent & Substitute Parts

Part Overview

The TL16C450N is a single-channel asynchronous communication element (UART IC) manufactured by Texas Instruments in a 40-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible functionality.

The TL16C450N provides asynchronous serial communication with modem control and false start bit detection capabilities. Due to its obsolete status, identifying functionally equivalent alternatives ensures design continuity and supply chain reliability.

Substiute Parts

TL16C450N

Texas InstrumentsIn Stock: 1439TL16C450N Datasheet

Current PartRFQ

TL16C450FN

Texas InstrumentsIn Stock: 1896TL16C450FN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TL16C450N is determined by the following critical parameters:

• Single UART Channel: The substitute must provide exactly one UART communication channel
• Voltage Supply Range: 4.75V ~ 5.25V compatibility is required
• Modem Control Support: The substitute must include modem control functionality
• False Start Bit Detection: This feature must be present in the substitute
• Base Product Number: TL16C450 series maintains functional equivalence

The TL16C450FN qualifies as a substitute based on matching all functional parameters. The primary difference is the package type: the substitute uses a 44-PLCC surface mount package instead of the 40-DIP through-hole package. This substitution requires PCB redesign for mounting compatibility but maintains full electrical and functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The TL16C450FN is the qualified substitute for the TL16C450N based on functional equivalence within the TL16C450 base product family. Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

The TL16C450FN carries a Last Time Buy status, indicating limited future availability. Both components share identical electrical specifications for supply voltage, UART channel count, modem control, and false start bit detection.

The primary design consideration is package transition: the substitute requires surface mount PCB layout versus through-hole mounting for the original part. The TL16C450FN has a higher moisture sensitivity level (MSL 3 versus MSL 1), requiring controlled storage conditions during manufacturing.

Frequently Asked Questions (FAQ)

Q: Can the TL16C450FN directly replace the TL16C450N without PCB modification?

A: No. The TL16C450N uses a 40-DIP through-hole package while the TL16C450FN uses a 44-PLCC surface mount package. PCB redesign is required for footprint compatibility.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both components operate within the 4.75V ~ 5.25V supply range and provide identical UART functionality including modem control and false start bit detection.

Q: What is the significance of the different MSL ratings?

A: The TL16C450N has MSL 1 (unlimited moisture exposure tolerance), while the TL16C450FN has MSL 3 (168-hour maximum exposure). The substitute requires controlled humidity storage and handling during manufacturing and assembly.

Q: Why is the TL16C450N listed as obsolete?

A: The TL16C450N has reached end-of-life status. The TL16C450FN, marked as Last Time Buy, represents the final available variant within this product family.

Q: Are both parts RoHS compliant?

A: Yes. Both the TL16C450N and TL16C450FN are ROHS3 compliant and REACH unaffected.

Q: What determines substitution eligibility for UART interface components?

A: Substitution requires matching channel count, supply voltage range, modem control capability, and false start bit detection. Package type and mounting method are secondary considerations requiring design adaptation.