SN65LBC174N Equivalent & Substitute Parts

Part Overview

The SN65LBC174N is a 4/0 Driver RS422/RS485 interface IC manufactured by Texas Instruments in a 16-DIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this functionality. The part operates across industrial temperature ranges (-40°C to 85°C) with a 30 Mbps data rate and 4.75V to 5.25V supply voltage specifications.

Substiute Parts

SN65LBC174N

Texas InstrumentsIn Stock: 2021SN65LBC174N Datasheet

Current PartRFQ

SN65LBC174DWR

Texas InstrumentsIn Stock: 4874SN65LBC174DWR Datasheet

MFR RecommendedRFQ

LTC487CN#PBF

Analog Devices Inc.In Stock: 1869LTC487CN#PBF Datasheet

MFR RecommendedRFQ

SN65LBC174AN

Texas InstrumentsIn Stock: 4151SN65LBC174AN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN65LBC174N are classified based on functional equivalence and allowed parameter variations:

Manufacturer Recommended Substitute (SN65LBC174DWR): Identical electrical specifications and base product number (65LBC174) with package form factor change from through-hole 16-DIP to surface-mount 20-SOIC. This substitution is valid when PCB layout accommodates surface-mount technology.

Manufacturer Recommended Substitute (LTC487CN#PBF): Functionally equivalent RS422/RS485 4/0 driver from Analog Devices Inc. in matching 16-DIP through-hole package. Operating temperature range differs (0°C to 70°C versus -40°C to 85°C). Data rate specification not provided for this part.

Parametric Equivalent (SN65LBC174AN): Identical Texas Instruments base product (65LBC174) with matching electrical specifications, receiver hysteresis, data rate, and operating temperature range. Package and mounting type are identical to the main part.

Substitution validity depends on: protocol compatibility (RS422/RS485), driver/receiver configuration (4/0), supply voltage range (4.75V ~ 5.25V), operating temperature requirements, and physical package constraints.

Parameter Comparison

Engineering Selection Recommendations

SN65LBC174AN is the primary parametric equivalent for through-hole applications. This part maintains identical electrical specifications, operating temperature range, and package form factor as the obsolete SN65LBC174N while offering active product status from Texas Instruments.

SN65LBC174DWR is suitable for designs that can accommodate surface-mount technology. This manufacturer-recommended substitute provides identical electrical performance and active product status with the advantage of smaller PCB footprint through 20-SOIC packaging.

LTC487CN#PBF provides functional equivalence in matching through-hole 16-DIP packaging from an alternative manufacturer (Analog Devices Inc.). Selection of this part requires verification that the reduced operating temperature range (0°C to 70°C) meets application requirements, as it does not support the full industrial temperature range of the original part.

All substitute parts maintain ROHS3 compliance and identical supply voltage specifications. Product status for all substitutes is active, ensuring long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can SN65LBC174DWR replace SN65LBC174N in existing designs?

A: SN65LBC174DWR provides electrical equivalence but requires PCB redesign due to package change from through-hole 16-DIP to surface-mount 20-SOIC. Electrical specifications and operating parameters are identical.

Q: What is the difference between SN65LBC174AN and SN65LBC174N?

A: Both parts share identical electrical specifications, operating temperature range (-40°C to 85°C), receiver hysteresis (40 mV), and data rate (30 Mbps). The primary difference is product status: SN65LBC174N is obsolete while SN65LBC174AN is active. Both use 16-DIP through-hole packaging.

Q: Is LTC487CN#PBF suitable for industrial temperature applications?

A: LTC487CN#PBF operates across 0°C to 70°C, which does not cover the full industrial range (-40°C to 85°C) of the original SN65LBC174N. Selection requires confirmation that application temperature requirements fall within the 0°C to 70°C specification.

Q: Are all substitute parts RoHS compliant?

A: Yes. SN65LBC174DWR, LTC487CN#PBF, and SN65LBC174AN are all ROHS3 compliant, matching the compliance status of the original SN65LBC174N.

Q: What are the critical parameters for RS422/RS485 driver substitution?

A: Protocol compatibility (RS422/RS485), driver/receiver count (4/0), supply voltage range (4.75V ~ 5.25V), operating temperature range, and package type determine substitution validity. Data rate and receiver hysteresis specifications must also be verified for application requirements.

Q: Can I use LTC487CN#PBF as a direct replacement in a through-hole design?

A: Yes, LTC487CN#PBF maintains the same 16-DIP through-hole package and can be used as a direct socket replacement. However, verify that the 0°C to 70°C operating temperature range meets your application requirements.