MAX3491EEPD Equivalent & Substitute Parts

Part Overview

The MAX3491EEPD is a 1/1 full-duplex RS422/RS485 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 14-DIP package. This component is classified as obsolete, which necessitates identifying equivalent or substitute parts for new designs or ongoing production requirements. The part operates across a 3V to 3.6V supply range with a 10 Mbps data rate and is rated for -40°C to 85°C operating temperatures.

Substiute Parts

MAX3491EEPD

Analog Devices Inc./Maxim IntegratedIn Stock: 1096MAX3491EEPD Datasheet

Current PartRFQ

MAX3491EPD+

Analog Devices Inc./Maxim IntegratedIn Stock: 3285MAX3491EPD+ Datasheet

Parametric EquivalentRFQ

SN75ALS180N

Texas InstrumentsIn Stock: 4319SN75ALS180N Datasheet

MFR RecommendedRFQ

SN75ALS181N

Texas InstrumentsIn Stock: 2189SN75ALS181N Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAX3491EEPD is determined by the following critical parameters:

• Package compatibility: 14-DIP (0.300", 7.62mm) form factor and Through Hole mounting
• Protocol support: RS422 and RS485 communication standards
• Transceiver configuration: 1/1 driver/receiver, full-duplex operation
• Electrical interface: Supply voltage range and receiver hysteresis characteristics
• Operating temperature range: -40°C to 85°C minimum requirement

Substitute parts must maintain identical or compatible values across these parameters to ensure direct replacement capability without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

MAX3491EPD+ is the primary parametric equivalent. This part maintains identical electrical specifications (3V to 3.6V supply, 50 mV receiver hysteresis, -40°C to 85°C operating range) and package form factor. The MAX3491EPD+ is currently in active production status and is ROHS3 compliant, making it the preferred choice for new designs and ongoing production where RoHS compliance is required.

SN75ALS180N and SN75ALS181N are Texas Instruments alternatives that share the same 14-DIP package and RS422/RS485 protocol support. However, these parts operate at 4.75V to 5.25V supply voltage and have a reduced operating temperature range (0°C to 70°C). These substitutes are suitable only for applications where the lower supply voltage range and narrower temperature range are acceptable. Both parts are ROHS3 compliant but are classified as obsolete.

For applications requiring the original 3V to 3.6V supply voltage and extended temperature range, MAX3491EPD+ is the only viable substitute among the listed options.

Frequently Asked Questions (FAQ)

Q: Can MAX3491EPD+ directly replace MAX3491EEPD without circuit modification?

A: Yes. The MAX3491EPD+ maintains identical electrical parameters (supply voltage 3V to 3.6V, receiver hysteresis 50 mV, operating temperature -40°C to 85°C) and the same 14-DIP package form factor. No circuit redesign is required.

Q: What is the key difference between MAX3491EPD+ and the original MAX3491EEPD?

A: The primary difference is product status and compliance. MAX3491EPD+ is in active production and ROHS3 compliant, whereas MAX3491EEPD is obsolete and RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Can SN75ALS180N or SN75ALS181N be used as direct replacements?

A: These Texas Instruments parts share the same package and protocol support but operate at different supply voltages (4.75V to 5.25V versus 3V to 3.6V) and have a narrower operating temperature range (0°C to 70°C versus -40°C to 85°C). They are suitable only if your application can accommodate these parameter differences.

Q: What does the 14-DIP package specification mean?

A: 14-DIP refers to a 14-pin Dual Inline Package with 0.300-inch (7.62mm) row spacing. All listed parts use this identical package, ensuring mechanical compatibility on through-hole PCB layouts.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance indicates the part meets restrictions on hazardous substances. MAX3491EPD+ is ROHS3 compliant, making it suitable for applications subject to environmental regulations. The original MAX3491EEPD is non-compliant, which may restrict its use in certain markets or applications.

Q: Are there any receiver hysteresis differences I should consider?

A: The MAX3491EEPD and MAX3491EPD+ both have 50 mV receiver hysteresis. The Texas Instruments alternatives (SN75ALS180N and SN75ALS181N) have 60 mV hysteresis, which provides slightly greater noise immunity but may affect signal detection thresholds in noise-sensitive applications.