MAX3223CDWR Equivalent & Substitute Parts

Part Overview

The MAX3223CDWR is a 2/2 transceiver full RS232 interface IC manufactured by Texas Instruments in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating end-of-life status. The device operates across a 3V to 5.5V supply range with a maximum data rate of 250kbps and supports full-duplex RS232 communication with 500mV receiver hysteresis. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term product support.

Substiute Parts

MAX3223CDWR

Texas InstrumentsIn Stock: 3318MAX3223CDWR Datasheet

Current PartRFQ

MAX3223EIDBR

Texas InstrumentsIn Stock: 4311MAX3223EIDBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX3223CDWR is determined by strict equivalence across the following critical parameters:

• Protocol compatibility: RS232 full-duplex transceiver
• Channel configuration: 2 drivers and 2 receivers
• Electrical specifications: 3V to 5.5V supply voltage, 500mV receiver hysteresis
• Functional performance: Data rate capability equal to or exceeding 250kbps
• Physical compatibility: Surface mount package with identical or compatible pinout
• Compliance: ROHS3 compliance and MSL rating

The MAX3223EIDBR qualifies as a direct substitute based on these parameters. While it features a different package format (20-SSOP versus 20-SOIC) and extended operating temperature range, the core electrical specifications, protocol, channel configuration, and compliance certifications remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

The MAX3223EIDBR serves as a functional equivalent for the MAX3223CDWR based on electrical and protocol specifications. Both devices maintain ROHS3 compliance and unlimited MSL ratings, ensuring regulatory and environmental compatibility.

The primary consideration for substitution is package format. The MAX3223EIDBR uses a 20-SSOP package (0.209" width, 5.30mm) compared to the 20-SOIC package (0.295" width, 7.50mm) of the original part. This dimensional difference requires PCB layout modification and footprint redesign.

The MAX3223EIDBR offers enhanced performance characteristics: a maximum data rate of 500kbps (double the original 250kbps specification) and an extended operating temperature range of -40°C to 85°C (versus 0°C to 70°C). These improvements provide additional design margin and operational flexibility without compromising compatibility with the original electrical interface requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAX3223EIDBR directly replace the MAX3223CDWR without PCB modifications?

A: No. While electrically equivalent, the MAX3223EIDBR uses a 20-SSOP package versus the 20-SOIC package of the original part. PCB footprint and layout modifications are required for physical installation.

Q: Are the pin configurations identical between these two parts?

A: Both devices are 20-pin surface mount transceivers with identical functional pin assignments for the 2/2 RS232 transceiver configuration. However, the physical package dimensions differ, requiring footprint redesign.

Q: Does the higher data rate of the MAX3223EIDBR (500kbps vs. 250kbps) affect compatibility?

A: No. Higher data rate capability is backward compatible. The MAX3223EIDBR operates at the original 250kbps specification and supports higher speeds if the application requires them.

Q: What is the significance of the extended operating temperature range in the MAX3223EIDBR?

A: The MAX3223EIDBR operates from -40°C to 85°C, compared to 0°C to 70°C for the original part. This extended range provides additional design margin for applications requiring broader temperature operation, though it does not affect compatibility at the original temperature specification.

Q: Are both parts RoHS compliant?

A: Yes. Both the MAX3223CDWR and MAX3223EIDBR are ROHS3 compliant with unlimited MSL ratings, ensuring regulatory compliance and consistent handling requirements.

Q: What is the base product number for these parts?

A: Both parts share the base product number MAX3223, indicating they are variants within the same product family with identical core functionality.