TRS3318IPWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3318IPWR is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 2 drivers and 2 receivers in a 20-TSSOP surface mount package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across a supply voltage range of 2.25V to 3V with a maximum data rate of 460Kbps and maintains a receiver hysteresis specification of 300 mV. Equivalent alternatives are available from both Texas Instruments and Analog Devices Inc./Maxim Integrated product lines.

Substiute Parts

TRS3318IPWR

Texas InstrumentsIn Stock: 864TRS3318IPWR Datasheet

Current PartRFQ

MAX3318EIPWR

Texas InstrumentsIn Stock: 3636MAX3318EIPWR Datasheet

Parametric EquivalentRFQ

MAX3318IPWR

Texas InstrumentsIn Stock: 3838MAX3318IPWR Datasheet

Parametric EquivalentRFQ

TRS3318EIPWR

Texas InstrumentsIn Stock: 3856TRS3318EIPWR Datasheet

Parametric EquivalentRFQ

MAX3318CUP+

Analog Devices Inc./Maxim IntegratedIn Stock: 761MAX3318CUP+ Datasheet

MFR RecommendedRFQ

MAX3318EAP+

Analog Devices Inc./Maxim IntegratedIn Stock: 2245MAX3318EAP+ Datasheet

MFR RecommendedRFQ

MAX3318ECUP+

Analog Devices Inc./Maxim IntegratedIn Stock: 1322MAX3318ECUP+ Datasheet

MFR RecommendedRFQ

MAX3318ECUP+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3901MAX3318ECUP+T Datasheet

MFR RecommendedRFQ

MAX3318EEUP+

Analog Devices Inc./Maxim IntegratedIn Stock: 3178MAX3318EEUP+ Datasheet

MFR RecommendedRFQ

MAX3317EEUP+T

Analog Devices Inc./Maxim IntegratedIn Stock: 789MAX3317EEUP+T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TRS3318IPWR is determined by strict adherence to the following critical parameters:

Primary Substitution Criteria:

• Protocol: RS232
• Number of Drivers/Receivers: 2/2
• Duplex: Full
• Receiver Hysteresis: 300 mV
• Data Rate: 460Kbps
• Voltage - Supply: 2.25V ~ 3V
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Package Considerations: Substitutes are grouped into two package categories: 20-TSSOP (0.173", 4.40mm Width) and 20-SSOP (0.209", 5.30mm Width). Parts maintaining the identical 20-TSSOP package are direct mechanical and electrical substitutes. The 20-SSOP variant (MAX3318EAP+) represents a functional equivalent with different physical dimensions and requires PCB layout verification.

Temperature Range Variations: Operating temperature ranges vary among substitutes. The main part and several substitutes operate across -40°C to 85°C. Substitutes with 0°C to 70°C operating ranges (MAX3318CUP+, MAX3318ECUP+, MAX3318ECUP+T) are suitable only for applications within this narrower temperature window.

Packaging Format Variations: Substitutes are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel®, Tape & Reel (TR), and Tube. These variations do not affect electrical or mechanical compatibility but impact procurement and assembly workflows.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Temperature Range, 20-TSSOP Package):

For applications requiring the complete operating temperature range of -40°C to 85°C with identical 20-TSSOP packaging, the following active parts provide direct substitution:

• MAX3318IPWR (Texas Instruments, Tape & Reel)
• MAX3318EIPWR (Texas Instruments, Cut Tape & Digi-Reel®)
• MAX3318EEUP+ (Analog Devices Inc./Maxim Integrated, Tube)
• MAX3317EEUP+T (Analog Devices Inc./Maxim Integrated, Tape & Reel)

These parts maintain all critical electrical parameters and compliance certifications (ROHS3, REACH Unaffected) identical to the main part.

Secondary Substitutes (Active Status, Restricted Temperature Range, 20-TSSOP Package):

For applications operating within 0°C to 70°C temperature limits:

• MAX3318ECUP+T (Analog Devices Inc./Maxim Integrated, Tape & Reel)
• MAX3318ECUP+ (Analog Devices Inc./Maxim Integrated, Tube)

Alternative Package Substitute (Active Status, Full Temperature Range, 20-SSOP Package):

For applications where 20-SSOP package dimensions (0.209", 5.30mm Width) are acceptable:

• MAX3318EAP+ (Analog Devices Inc./Maxim Integrated, Tube)

This part requires PCB layout verification due to different physical dimensions compared to the 20-TSSOP package.

Avoid:

• MAX3318CUP+ (Obsolete status; use active alternatives instead)

Frequently Asked Questions (FAQ)

Q: Can MAX3318IPWR directly replace TRS3318IPWR in existing designs?

A: Yes. MAX3318IPWR maintains identical electrical specifications (RS232 protocol, 2/2 drivers/receivers, 460Kbps data rate, 2.25V–3V supply, -40°C to 85°C operating range) and identical 20-TSSOP package dimensions. The primary difference is active product status and packaging format (Tape & Reel vs. unspecified for the original part).

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: Both are 20-pin surface mount packages with identical pin counts and electrical compatibility. The 20-TSSOP has a width of 0.173" (4.40mm), while the 20-SSOP has a width of 0.209" (5.30mm). PCB footprints differ; substitution requires layout verification.

Q: Are parts with 0°C to 70°C operating temperature suitable for my -40°C to 85°C application?

A: No. Parts such as MAX3318ECUP+ and MAX3318ECUP+T are rated only to 0°C minimum and 70°C maximum. Use these only if your application operates within this narrower range. For full -40°C to 85°C coverage, select MAX3318IPWR, MAX3318EIPWR, MAX3318EEUP+, or MAX3317EEUP+T.

Q: What packaging formats are available, and do they affect electrical performance?

A: Substitutes are available in Tape & Reel (TR), Cut Tape & Digi-Reel® (CT), and Tube formats. These are procurement and assembly format variations only; electrical performance and mechanical compatibility remain identical within the same package type (20-TSSOP or 20-SSOP).

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH Unaffected status, matching the main part's regulatory certifications.

Q: Why is MAX3318CUP+ listed if it is obsolete?

A: MAX3318CUP+ is included for reference only to document historical equivalence. For new designs and procurement, select active alternatives such as MAX3318ECUP+ or MAX3318ECUP+T if the 0°C to 70°C temperature range is acceptable, or MAX3318EEUP+ for the full -40°C to 85°C range.

Q: Can I use MAX3317EEUP+T as a substitute?

A: Yes. MAX3317EEUP+T is a parametric equivalent with identical electrical specifications and 20-TSSOP package. The base product number differs (MAX3317 vs. MAX3318), but all critical functional parameters match the TRS3318IPWR.