TL145406DWR Equivalent & Substitute Parts

Part Overview

The TL145406DWR is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 3 drivers and 3 receivers in a 16-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production status. Alternative equivalent parts are necessary to ensure design continuity and long-term component availability for new production runs and system maintenance.

Substiute Parts

TL145406DWR

Texas InstrumentsIn Stock: 5608TL145406DWR Datasheet

Current PartRFQ

LT1039ACSW16#PBF

Analog Devices Inc.In Stock: 1100LT1039ACSW16#PBF Datasheet

MFR RecommendedRFQ

LT1039CSW16#PBF

Analog Devices Inc.In Stock: 1179LT1039CSW16#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TL145406DWR is determined by strict equivalence across the following critical parameters:

• Protocol: RS232 full-duplex transceiver
• Driver/Receiver Configuration: 3/3 architecture
• Package Type: 16-SOIC surface mount form factor
• Electrical Compatibility: Supply voltage range and operating temperature overlap
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The substitute parts identified—LT1039ACSW16#PBF and LT1039CSW16#PBF (both Analog Devices Inc.)—maintain functional equivalence through identical driver/receiver count, RS232 protocol implementation, and compatible 16-SOIC packaging. Both substitutes are Active products with established supply availability.

Parameter Comparison

Engineering Selection Recommendations

Both LT1039ACSW16#PBF and LT1039CSW16#PBF are functionally equivalent substitutes for the TL145406DWR. Selection between these alternatives should be based on the following factors:

Supply Voltage Consideration: The TL145406DWR operates within a narrower supply range (4.5V ~ 5.5V), while both Analog Devices substitutes accept a wider range (5V ~ 15V). Designs operating at the lower end of the TL145406DWR specification (below 5V) require circuit validation against the substitute's minimum 5V requirement.

Receiver Hysteresis Difference: The TL145406DWR specifies 500 mV receiver hysteresis compared to 400 mV for both substitutes. This parameter difference may affect noise immunity characteristics in specific applications and should be evaluated against system requirements.

Product Status and Availability: Both substitute parts carry Active product status with documented inventory availability (LT1039ACSW16#PBF: 1073 pcs; LT1039CSW16#PBF: 1158 pcs), ensuring long-term supply continuity compared to the Last Time Buy status of the original part.

Regulatory Compliance: All three parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence for applications subject to these requirements.

Frequently Asked Questions (FAQ)

Q: Can LT1039ACSW16#PBF and LT1039CSW16#PBF be used interchangeably with TL145406DWR?

A: Both Analog Devices parts are functionally equivalent substitutes. They share identical driver/receiver configuration (3/3), RS232 protocol implementation, and 16-SOIC packaging. However, circuit validation is required for designs operating below 5V supply voltage, as the substitutes specify a 5V minimum.

Q: What is the significance of the receiver hysteresis difference?

A: Receiver hysteresis affects the input threshold switching behavior. The TL145406DWR specifies 500 mV while the substitutes specify 400 mV. In noise-sensitive applications, this difference may impact signal integrity and should be evaluated against system noise margins.

Q: Are the package dimensions identical across all three parts?

A: Yes. All three parts use the 16-SOIC package with 0.295" width and 7.50mm width specification, ensuring direct PCB footprint compatibility without layout modifications.

Q: Why is the TL145406DWR marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production of this part. Equivalent substitutes from active manufacturers ensure design continuity and long-term component availability.

Q: Do all parts meet the same regulatory requirements?

A: Yes. The TL145406DWR and both substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence for applicable applications.

Q: What is the difference between LT1039ACSW16#PBF and LT1039CSW16#PBF?

A: Both parts are functionally identical RS232 transceivers with 3/3 driver/receiver configuration. The designation difference reflects internal temperature or performance grade variations within the Analog Devices LT1039 product line, but electrical specifications and package form factor remain equivalent.