MAX239ENG Equivalent & Substitute Parts

Part Overview

The MAX239ENG is a full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, featuring 3 drivers and 5 receivers in a 24-pin DIP package. This component is classified as obsolete, indicating that direct procurement from primary sources may be limited. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this interface component.

Substiute Parts

MAX239ENG

Analog Devices Inc./Maxim IntegratedIn Stock: 2343MAX239ENG Datasheet

Current PartRFQ

MAX239ENG+

Analog Devices Inc./Maxim IntegratedIn Stock: 934MAX239ENG+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX239ENG is determined by strict equivalence across the following critical parameters:

• Protocol Compliance: RS232 full-duplex transceiver functionality
• Driver/Receiver Configuration: 3 drivers and 5 receivers
• Electrical Specifications: Supply voltage range (5V, 7.5V ~ 13.2V), operating temperature range (-40°C ~ 85°C), data rate (120Kbps), and receiver hysteresis (500 mV)
• Package Compatibility: 24-pin DIP form factor (0.300", 7.62mm) for through-hole mounting
• Pinout Compatibility: Identical pin assignment and signal routing

The MAX239ENG+ meets all these criteria and is identified as a parametric equivalent. The primary distinction is product status and compliance certification, not functional or electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The MAX239ENG+ is a direct parametric equivalent to the MAX239ENG with identical electrical and functional specifications. The MAX239ENG+ is currently in active production status, whereas the MAX239ENG is obsolete. For new designs or ongoing production requiring RS232 transceiver functionality with 3/5 driver/receiver configuration, the MAX239ENG+ is the appropriate selection.

The MAX239ENG+ provides ROHS3 compliance, meeting current environmental and regulatory requirements. The MAX239ENG is RoHS non-compliant and should be reserved for legacy system maintenance only where regulatory exemptions apply or where existing inventory must be consumed.

Both parts share identical package geometry, pinout, and electrical performance characteristics, ensuring direct substitution without circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can MAX239ENG+ be used as a direct replacement for MAX239ENG?

A: Yes. The MAX239ENG+ is a parametric equivalent with identical electrical specifications, pinout, and package dimensions. Direct substitution is possible without circuit modification.

Q: What is the primary difference between MAX239ENG and MAX239ENG+?

A: The MAX239ENG+ is in active production status with ROHS3 compliance certification. The MAX239ENG is obsolete and RoHS non-compliant. Functional and electrical performance are identical.

Q: Are there any packaging differences between these parts?

A: Both parts use 24-pin DIP packaging (0.300", 7.62mm) for through-hole mounting. The MAX239ENG is supplied in standard packaging, while MAX239ENG+ is supplied in tube packaging. This does not affect electrical performance or board-level compatibility.

Q: What supply voltage options are supported?

A: Both parts support dual supply voltage operation: 5V single supply or 7.5V to 13.2V dual supply configuration.

Q: Is the MAX239ENG+ suitable for applications requiring RoHS compliance?

A: Yes. The MAX239ENG+ is ROHS3 compliant and meets current environmental regulations. The original MAX239ENG is not RoHS compliant.

Q: What is the maximum data rate for these transceivers?

A: Both parts support a maximum data rate of 120Kbps for RS232 communication.