MAX248CQH-D Equivalent & Substitute Parts

Part Overview

The MAX248CQH-D is an 8/8 full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 44-PLCC surface-mount package. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure long-term component availability for new production runs and system maintenance.

Substiute Parts

MAX248CQH-D

Analog Devices Inc./Maxim IntegratedIn Stock: 1096MAX248CQH-D Datasheet

Current PartRFQ

MAX248CQH+D

Analog Devices Inc./Maxim IntegratedIn Stock: 3046MAX248CQH+D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX248CQH-D is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: RS232 full-duplex transceiver
• Channel Configuration: 8 drivers and 8 receivers
• Electrical Performance: 500 mV receiver hysteresis, 120 Kbps data rate, 4.75V–5.25V supply voltage
• Thermal Range: 0°C to 70°C operating temperature
• Physical Form Factor: 44-PLCC surface-mount package (16.59x16.59 mm)
• Manufacturer Continuity: Analog Devices Inc./Maxim Integrated

The substitute part MAX248CQH+D meets all these criteria while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MAX248CQH+D is the direct functional equivalent of the MAX248CQH-D. Selection of the substitute part is justified on the following grounds:

Product Status: The MAX248CQH+D maintains active product status with Analog Devices Inc./Maxim Integrated, ensuring continued availability, technical support, and manufacturing consistency. The original MAX248CQH-D is obsolete, presenting supply chain risk.

Regulatory Compliance: The MAX248CQH+D is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components in most jurisdictions. The original part is RoHS non-compliant, which may restrict its use in new designs or regulated applications.

Electrical and Mechanical Equivalence: All functional parameters—protocol, channel count, data rate, supply voltage, operating temperature, and package form factor—are identical between the two parts, ensuring direct pin-for-pin and functional compatibility.

Moisture Sensitivity: Both parts share identical MSL rating (3, 168 Hours), requiring equivalent handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can MAX248CQH+D be used as a direct replacement for MAX248CQH-D?

A: Yes. The MAX248CQH+D is electrically and mechanically equivalent to the MAX248CQH-D. All functional parameters, pin assignments, and package dimensions are identical. No circuit modifications are required.

Q: What is the difference between the "-D" and "+D" suffix designations?

A: The suffix designates packaging format. The "-D" variant uses tape and reel packaging, while the "+D" variant uses tube packaging. Both contain identical die and electrical specifications.

Q: Why should I transition from MAX248CQH-D to MAX248CQH+D?

A: The MAX248CQH-D is obsolete and subject to supply discontinuation. The MAX248CQH+D is an active product with guaranteed availability. Additionally, the substitute part is ROHS3 compliant, meeting modern regulatory standards.

Q: Are there any thermal or electrical performance differences?

A: No. Both parts operate within identical voltage ranges (4.75V–5.25V), temperature ranges (0°C–70°C), and data rates (120 Kbps). Receiver hysteresis and all other electrical characteristics are equivalent.

Q: What is the moisture sensitivity level, and does it affect handling?

A: Both parts carry MSL 3 (168 Hours) rating. This requires storage in controlled humidity environments and adherence to standard moisture-sensitive device handling procedures during assembly.

Q: Is the 44-PLCC package footprint identical between both parts?

A: Yes. Both parts use the 44-PLCC package with dimensions of 16.59x16.59 mm. PCB footprints and land patterns are interchangeable.