MAX244C/D Equivalent & Substitute Parts

Part Overview

The MAX244C/D is an 8/10 transceiver full RS232 die manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a full-duplex RS232 interface transceiver with integrated driver and receiver circuits. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

MAX244C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 681MAX244C/D Datasheet

Current PartRFQ

MAX244CQH+D

Analog Devices Inc./Maxim IntegratedIn Stock: 983MAX244CQH+D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX244C/D is determined by the following critical parameters that must remain consistent:

• Protocol Compatibility: RS232 full-duplex transceiver functionality
• Driver/Receiver Configuration: 8/10 transceiver arrangement
• Electrical Performance: 500 mV receiver hysteresis, 120 Kbps data rate capability
• Supply Voltage Range: 4.5V to 5.5V operation
• Temperature Range: 0°C to 70°C operating window
• Surface Mount Technology: Compatibility with SMT assembly processes
• Regulatory Compliance: ROHS3 and REACH compliance status

The MAX244CQH+D qualifies as a manufacturer-recommended substitute. While it maintains identical functional specifications (8/10 RS232 transceiver, full-duplex operation, 500 mV hysteresis, 120 Kbps data rate), it differs in physical packaging format (44-PLCC vs. die form) and product status (active vs. obsolete). The substitute part operates within compatible supply voltage and temperature ranges, ensuring functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The MAX244CQH+D is the manufacturer-recommended substitute for the obsolete MAX244C/D. Both components maintain identical functional specifications for RS232 transceiver operation, ensuring direct functional compatibility in circuit designs.

Product Status Consideration: The MAX244C/D is obsolete with limited inventory availability (666 pieces). The MAX244CQH+D is active production, providing long-term supply chain stability and availability assurance.

Compliance Status: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for current manufacturing and deployment.

Packaging Difference: The primary distinction is packaging format. The MAX244C/D is supplied as a die, while the MAX244CQH+D is packaged in 44-PLCC form factor. This packaging difference requires circuit board redesign if transitioning from die-level integration to packaged component integration.

Supply Voltage Range: The MAX244CQH+D operates within a narrower supply voltage window (4.75V ~ 5.25V) compared to the MAX244C/D (4.5V ~ 5.5V). Designs operating at the extremes of the original specification range require verification of compatibility with the substitute part's tighter tolerance.

Moisture Sensitivity: The MAX244CQH+D has MSL rating of 3 (168 hours), compared to MSL 1 (unlimited) for the MAX244C/D. This affects storage and handling requirements for the substitute component.

Frequently Asked Questions (FAQ)

Q: Can the MAX244CQH+D directly replace the MAX244C/D in existing designs?

A: Functional replacement is possible due to identical transceiver specifications (8/10 RS232, full-duplex, 500 mV hysteresis, 120 Kbps data rate). However, the packaging difference (44-PLCC vs. die) requires circuit board redesign. The narrower supply voltage range (4.75V ~ 5.25V vs. 4.5V ~ 5.5V) must be evaluated for your specific application.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on protocol (RS232), transceiver configuration (8/10), duplex mode (full), receiver hysteresis (500 mV), data rate (120 Kbps), supply voltage compatibility, operating temperature range (0°C ~ 70°C), and surface mount technology. All these parameters must align between the original and substitute part.

Q: Does the MAX244CQH+D meet the same regulatory requirements?

A: Yes. Both the MAX244C/D and MAX244CQH+D are ROHS3 compliant and REACH unaffected, satisfying current regulatory standards.

Q: What is the impact of the different moisture sensitivity levels?

A: The MAX244C/D has MSL 1 (unlimited shelf life), while the MAX244CQH+D has MSL 3 (168-hour floor life after moisture exposure). The substitute part requires stricter moisture control during storage and handling to prevent degradation.

Q: Are there supply voltage considerations when using the MAX244CQH+D?

A: The MAX244CQH+D operates within 4.75V ~ 5.25V, which is narrower than the MAX244C/D range of 4.5V ~ 5.5V. If your design operates near 4.5V or 5.5V, the substitute part may not be suitable without circuit modification.