MAX3185CAP-T RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3185CAP-T is a full-duplex RS232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, featuring 3 drivers and 5 receivers in a 20-SSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across a 4.5V to 5.5V supply range with a maximum data rate of 230kbps and receiver hysteresis of 650mV, suitable for industrial and commercial RS232 communication applications.

Substiute Parts

MAX3185CAP-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1134MAX3185CAP-T Datasheet

Current PartRFQ

MAX3185CAP+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2439MAX3185CAP+T Datasheet

Parametric EquivalentRFQ

GD75232DBR

Texas InstrumentsIn Stock: 43310GD75232DBR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX3185CAP-T is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 3/5
• Duplex: Full
• Package / Case: 20-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• Operating Temperature Range: 0°C ~ 70°C

Allowable Parameter Variations:

• Voltage - Supply: Substitute must support the 4.5V ~ 5.5V range or broader compatible range
• Data Rate: Substitute must meet or exceed 230kbps minimum
• Receiver Hysteresis: Acceptable within ±150mV tolerance of 650mV specification
• Product Status: Active status preferred for long-term availability
• RoHS Compliance: Upgrades to RoHS3 compliant status are acceptable

Two substitute parts meet these criteria and are listed below.

Parameter Comparison

Engineering Selection Recommendations

MAX3185CAP+T (Parametric Equivalent): This part is the direct parametric equivalent to the MAX3185CAP-T, manufactured by the same supplier (Analog Devices Inc./Maxim Integrated). It maintains identical electrical specifications including 230kbps data rate, 650mV receiver hysteresis, and 4.5V ~ 5.5V supply voltage. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant). This part is recommended for applications requiring exact electrical performance matching and continued support from the original manufacturer. Packaging format is Tape & Reel (TR) with higher inventory availability (2334 units).

GD75232DBR (MFR Recommended): This Texas Instruments part meets all mandatory substitution criteria with identical driver/receiver configuration, duplex mode, package type, and operating temperature range. However, it operates at a lower maximum data rate (120kbps vs. 230kbps) and features reduced receiver hysteresis (500mV vs. 650mV). The supply voltage range is broader (5V, ±7.5V ~ 15V), providing greater flexibility for multi-voltage systems. This part is recommended for applications where the lower data rate is acceptable and where the extended supply voltage range provides system advantages. Significantly higher inventory availability (43200 units) supports long-term procurement stability.

Selection Criteria:

• Choose MAX3185CAP+T for direct replacement requiring identical electrical performance and original manufacturer support.
• Choose GD75232DBR for applications tolerant of reduced data rate and hysteresis specifications, or where extended supply voltage range is beneficial.
• Both substitute parts are ROHS3 compliant and Active status, ensuring regulatory compliance and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the GD75232DBR operate at the same data rate as the MAX3185CAP-T? A: No. The GD75232DBR is specified for a maximum data rate of 120kbps, while the MAX3185CAP-T operates at 230kbps. Applications requiring the full 230kbps performance must use the MAX3185CAP+T.

Q: Are both substitute parts pin-compatible with the MAX3185CAP-T? A: Yes. Both substitute parts use the identical 20-SSOP package with 0.209" width and 5.30mm dimensions, ensuring mechanical and electrical pin compatibility.

Q: What is the difference between MAX3185CAP-T and MAX3185CAP+T packaging? A: The MAX3185CAP-T is supplied in Tube packaging, while the MAX3185CAP+T is supplied in Tape & Reel (TR) format. Both contain identical die and electrical specifications; packaging format differs only for handling and automated assembly convenience.

Q: Does the GD75232DBR require different circuit design considerations? A: The GD75232DBR operates with a broader supply voltage range (5V, ±7.5V ~ 15V) compared to the MAX3185CAP-T (4.5V ~ 5.5V). Receiver hysteresis is lower (500mV vs. 650mV), which may affect noise immunity in electrically noisy environments. Circuit validation is necessary if hysteresis margin is critical to system performance.

Q: Are both substitute parts RoHS compliant? A: Yes. Both MAX3185CAP+T and GD75232DBR are ROHS3 compliant. The original MAX3185CAP-T is RoHS non-compliant, making the substitutes suitable for applications with RoHS compliance requirements.

Q: Which substitute part has better long-term availability? A: The GD75232DBR has significantly higher inventory (43200 units) compared to MAX3185CAP+T (2334 units), supporting extended procurement windows and supply chain stability.