SP312ACT-L/TR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP312ACT-L/TR is a 2/2 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in an 18-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and production continuity. The part operates within a 4.5V to 5.5V supply voltage range and supports data rates up to 240 kbps with a 500 mV receiver hysteresis specification.

Substiute Parts

SP312ACT-L/TR

MaxLinear, Inc.In Stock: 2398SP312ACT-L/TR Datasheet

Current PartRFQ

ADM242ARZ

Analog Devices Inc.In Stock: 2122ADM242ARZ Datasheet

MFR RecommendedRFQ

ADM242ARZ-REEL

Analog Devices Inc.In Stock: 21322ADM242ARZ-REEL Datasheet

MFR RecommendedRFQ

MAX242CWN+

Analog Devices Inc./Maxim IntegratedIn Stock: 2175MAX242CWN+ Datasheet

MFR RecommendedRFQ

MAX242CWN+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4260MAX242CWN+T Datasheet

MFR RecommendedRFQ

MAX242EWN+

Analog Devices Inc./Maxim IntegratedIn Stock: 12643MAX242EWN+ Datasheet

MFR RecommendedRFQ

MAX242EWN+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3110MAX242EWN+T Datasheet

MFR RecommendedRFQ

MAX222CWN+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3308MAX222CWN+T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SP312ACT-L/TR is determined by the following critical parameters:

• Protocol: RS232 (mandatory match)
• Number of Drivers/Receivers: 2/2 (mandatory match)
• Duplex: Full (mandatory match)
• Package / Case: 18-SOIC (mandatory match)
• Voltage - Supply: 4.5V ~ 5.5V (mandatory match)
• Mounting Type: Surface Mount (mandatory match)

Substitute parts are grouped into two categories:

MFR Recommended Substitutes: Parts that maintain identical or superior electrical specifications while offering active product status and improved compliance certifications (RoHS3, REACH).

Parametric Equivalents: Parts that meet all mandatory electrical and mechanical parameters but may have minor variations in data rate or operating temperature range, suitable for applications where these variations do not impact system performance.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain the mandatory electrical and mechanical compatibility parameters required for direct replacement of the SP312ACT-L/TR. Selection should be based on the following criteria:

For applications requiring identical operating temperature range (0°C ~ 70°C): MAX242CWN+, MAX242CWN+T, and MAX222CWN+T are suitable selections. MAX222CWN+T offers the highest data rate at 250 kbps.

For applications requiring extended operating temperature range (-40°C ~ 85°C): ADM242ARZ, ADM242ARZ-REEL, MAX242EWN+, and MAX242EWN+T provide superior thermal performance.

For packaging considerations: MAX242CWN+T, MAX242EWN+T, and MAX222CWN+T are supplied in Tape & Reel format. ADM242ARZ-REEL is supplied on reel. MAX242CWN+, MAX242EWN+, and ADM242ARZ are supplied in tube packaging.

All active substitute parts carry RoHS3 compliance and REACH unaffected status, with MSL rating of 1 (Unlimited), representing improved moisture handling compared to the obsolete SP312ACT-L/TR.

Frequently Asked Questions (FAQ)

Q: Can the SP312ACT-L/TR be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts maintain identical RS232 protocol, 2/2 driver/receiver configuration, full-duplex operation, 18-SOIC package, and 4.5V to 5.5V supply voltage specifications. Physical and electrical compatibility is confirmed.

Q: What is the difference between ADM242ARZ and ADM242ARZ-REEL?

A: Both parts are electrically identical. The primary difference is packaging format: ADM242ARZ is supplied in tube packaging, while ADM242ARZ-REEL is supplied on reel. Selection depends on assembly line requirements and inventory management practices.

Q: Why do some substitutes have lower data rates than the original SP312ACT-L/TR?

A: The ADM242ARZ series operates at 200 kbps, which is lower than the SP312ACT-L/TR specification of 240 kbps. However, this remains suitable for most RS232 applications. The MAX222CWN+T variant supports 250 kbps, exceeding the original specification.

Q: What is the significance of MSL rating differences?

A: The SP312ACT-L/TR carries MSL 3 (168 hours), while all active substitutes carry MSL 1 (Unlimited). Lower MSL ratings indicate superior moisture resistance and reduced risk of damage during storage and assembly processes.

Q: Are there any compliance advantages to using the substitute parts?

A: All active substitute parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The obsolete SP312ACT-L/TR does not carry these certifications, making substitutes preferable for new designs and regulatory compliance requirements.

Q: Which substitute part offers the best overall performance?

A: Selection depends on application requirements. MAX242EWN+T combines extended operating temperature range (-40°C ~ 85°C), 500 mV receiver hysteresis matching the original part, active product status, and superior compliance certifications. MAX222CWN+T offers the highest data rate at 250 kbps for temperature-constrained applications.