SP337EUET-L Equivalent & Substitute Parts

Part Overview

The SP337EUET-L is a 2/2 full-duplex RS232, RS422, RS485 transceiver manufactured by MaxLinear, Inc., housed in a 28-SOIC surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production runs and system updates.

Substiute Parts

SP337EUET-L

MaxLinear, Inc.In Stock: 820SP337EUET-L Datasheet

Current PartRFQ

SP338EER1-L

MaxLinear, Inc.In Stock: 27315SP338EER1-L Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP337EUET-L is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support RS232, RS422, and RS485 protocols
• Duplex Mode: Full-duplex operation is required
• Data Rate: 1 Mbps operation capability
• Supply Voltage Range: Compatible with 3.3V and 5V supply rails
• Operating Temperature: -40°C ~ 85°C range
• Moisture Sensitivity Level: MSL 3 classification
• Electrical Classification: ECCN EAR99 and HTSUS 8542.39.0001

The SP338EER1-L qualifies as a substitute despite differences in driver/receiver count (3/5 vs. 2/2) and package format (40-QFN vs. 28-SOIC), as it maintains all protocol, voltage, temperature, and electrical compliance parameters. The increased driver/receiver count and alternative package provide enhanced functionality while preserving core transceiver specifications.

Parameter Comparison

Engineering Selection Recommendations

The SP338EER1-L is an active product with ROHS3 compliance and REACH unaffected status, providing regulatory assurance for new designs. The transition from SP337EUET-L to SP338EER1-L requires PCB layout modification due to package change from 28-SOIC to 40-QFN (6x6), but maintains electrical compatibility across all protocol specifications. The SP338EER1-L's increased driver/receiver configuration (3/5) and improved receiver hysteresis (300 mV vs. 500 mV) offer enhanced signal integrity margins. Component availability for SP338EER1-L is significantly higher (27,242 units in stock vs. 809 units), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can SP338EER1-L directly replace SP337EUET-L without circuit modification?

A: Electrical protocol compatibility is maintained; however, package geometry differs (28-SOIC vs. 40-QFN 6x6). PCB footprint redesign is required. Pin-to-pin functional mapping must be verified against device datasheets before implementation.

Q: What is the impact of the 3/5 driver/receiver configuration versus 2/2?

A: The SP338EER1-L provides additional driver and receiver channels. Unused channels can remain unconnected without affecting operation of the 2/2 configuration required by the original design.

Q: Does the 300 mV receiver hysteresis on SP338EER1-L affect compatibility?

A: The reduced hysteresis (300 mV vs. 500 mV) improves noise margin and signal detection sensitivity. This change is compatible with RS232, RS422, and RS485 specifications and does not introduce incompatibility.

Q: Are there supply voltage differences between the parts?

A: SP337EUET-L operates across 3.3V ~ 5V range, while SP338EER1-L specifies discrete 3.3V and 5V operation. Both support standard industrial supply voltages; verify your specific supply voltage matches one of the SP338EER1-L specifications.

Q: What are the moisture sensitivity implications?

A: Both parts carry MSL 3 classification (168 hours), requiring identical handling, storage, and reflow procedures. No additional moisture control measures are necessary when transitioning between these parts.