MAX240CMH RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX240CMH is a full-duplex RS232 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated, featuring 5 drivers and 5 receivers in a 44-MQFP surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent parts to ensure continued design support and procurement availability for new production runs and system maintenance.

Substiute Parts

MAX240CMH

Analog Devices Inc./Maxim IntegratedIn Stock: 2004MAX240CMH Datasheet

Current PartRFQ

MAX240CMH+D

Analog Devices Inc./Maxim IntegratedIn Stock: 1035MAX240CMH+D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX240CMH is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: RS232 full-duplex transceiver functionality
• Channel Configuration: 5 drivers and 5 receivers
• Electrical Performance: 500 mV receiver hysteresis, 120 Kbps data rate, 4.5V to 5.5V supply voltage
• Thermal Specifications: 0°C to 70°C operating temperature range
• Package Footprint: 44-QFP (10x10 mm) surface mount package

The MAX240CMH+D meets all these parameters while offering improved product status and regulatory compliance, making it a direct parametric equivalent suitable for design transitions and procurement replacement.

Parameter Comparison

Engineering Selection Recommendations

The MAX240CMH+D is the direct parametric equivalent for the obsolete MAX240CMH. Selection of the MAX240CMH+D is justified on the following grounds:

• Product Status: The MAX240CMH+D maintains active product status, ensuring long-term availability and manufacturer support, whereas the MAX240CMH is obsolete.
• Regulatory Compliance: The MAX240CMH+D is ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production. The original MAX240CMH is RoHS non-compliant.
• Functional Equivalence: All electrical, thermal, and mechanical parameters are identical, ensuring drop-in compatibility at the circuit level.
• Packaging: Both parts use identical 44-QFP (10x10 mm) surface mount packages, requiring no PCB redesign.

For applications requiring the MAX240CMH, transition to MAX240CMH+D is recommended to ensure compliance with current procurement standards and regulatory frameworks.

Frequently Asked Questions (FAQ)

Q: Can MAX240CMH+D be used as a direct replacement for MAX240CMH?

A: Yes. The MAX240CMH+D is a parametric equivalent with identical electrical specifications, channel configuration (5/5 drivers/receivers), data rate (120 Kbps), supply voltage range (4.5V to 5.5V), operating temperature range (0°C to 70°C), and package footprint (44-QFP 10x10 mm). No circuit modifications are required.

Q: What is the difference between MAX240CMH and MAX240CMH+D?

A: The primary differences are product status and regulatory compliance. MAX240CMH is obsolete and RoHS non-compliant, while MAX240CMH+D is active and ROHS3 compliant. The "+D" suffix indicates tray packaging. All functional and electrical parameters remain identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the 44-QFP (10x10 mm) surface mount package with identical pinouts. PCB layout and footprints are interchangeable.

Q: Why is MAX240CMH obsolete?

A: The MAX240CMH has been discontinued by the manufacturer. The MAX240CMH+D represents the active equivalent in the product line and is the recommended part for new designs and procurement.

Q: What does ROHS3 compliance mean for MAX240CMH+D?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive, restricting the use of specific hazardous materials. This is a regulatory requirement for components used in many markets and applications.

Q: Is the MSL rating the same for both parts?

A: Yes. Both MAX240CMH and MAX240CMH+D have an MSL rating of 3 (168 Hours), indicating identical moisture sensitivity and handling requirements during storage and assembly.