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MAX232ACWE Equivalent & Substitute Parts
Part Overview
The MAX232ACWE is a 2/2 full-duplex RS232 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC surface mount package. This interface component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part operates within a 4.5V to 5.5V supply voltage range and supports data rates up to 200 kbps with a receiver hysteresis of 500 mV.
Substiute Parts
Key Parameters
| Parameter | MAX232ACWE |
|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Receiver Hysteresis | 500 mV |
| Data Rate | 200 kbps |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 16-SOIC (0.295", 7.50mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution of the MAX232ACWE is determined by strict equivalence across the following parameters: RS232 protocol compliance, 2/2 driver/receiver configuration, full-duplex operation, 16-SOIC package footprint, 4.5V to 5.5V supply voltage range, and surface mount technology. The receiver hysteresis and data rate specifications define performance boundaries within which alternatives must operate. Substitute parts are grouped into two categories:
Parametric Equivalents: Parts maintaining identical electrical specifications and package dimensions as the original MAX232ACWE.
Manufacturer-Recommended Alternatives: Parts from Analog Devices Inc. that meet core functional requirements while offering enhanced product status (Active vs. Obsolete) and improved compliance certifications (RoHS3 Compliant vs. RoHS non-compliant).
Parameter Comparison
| Part Number | Manufacturer | Protocol | Drivers/Receivers | Duplex | Receiver Hysteresis | Data Rate | Supply Voltage | Operating Temp | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MAX232ACWE | Analog Devices Inc./Maxim Integrated | RS232 | 2/2 | Full | 500 mV | 200 kbps | 4.5V ~ 5.5V | 0°C ~ 70°C | 16-SOIC (0.295", 7.50mm) | Obsolete | RoHS non-compliant |
| MAX232ACWE+ | Analog Devices Inc./Maxim Integrated | RS232 | 2/2 | Full | 500 mV | 200 kbps | 4.5V ~ 5.5V | 0°C ~ 70°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM202JRWZ | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | — | 4.5V ~ 5.5V | 0°C ~ 70°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM202JRWZ-REEL | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | — | 4.5V ~ 5.5V | 0°C ~ 70°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM232AARNZ | UMW | RS232 | 2/2 | Full | — | 120 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOP (0.154", 3.90mm) | Active | ROHS3 Compliant |
| ADM232AARNZ-REEL | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | 200 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | ROHS3 Compliant |
| ADM232AARNZ-REEL7 | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | 200 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | ROHS3 Compliant |
| ADM232AARWZ | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | 200 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM232AARWZ-REEL | Analog Devices Inc. | RS232 | 2/2 | Full | 400 mV | 200 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM232LARZ | Analog Devices Inc. | RS232 | 2/2 | Full | 650 mV | 120 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
| ADM232LARZ-REEL | Analog Devices Inc. | RS232 | 2/2 | Full | 650 mV | 120 kbps | 4.5V ~ 5.5V | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
For Direct Replacement (Identical Specifications): MAX232ACWE+ is the primary substitute, offering identical electrical performance and package dimensions while transitioning from obsolete to active product status with ROHS3 compliance.
For Extended Temperature Range Applications: ADM232AARWZ and ADM232AARWZ-REEL extend the operating temperature range to -40°C ~ 85°C, maintaining the 200 kbps data rate and 16-SOIC (0.295", 7.50mm) package footprint. These parts are suitable for industrial and automotive environments requiring broader thermal specifications.
For Packaging Variants: ADM202JRWZ and ADM202JRWZ-REEL provide tube and tape & reel packaging options respectively, with identical core electrical specifications to the original part. Both maintain active product status and ROHS3 compliance.
For Lower Data Rate Applications: ADM232LARZ and ADM232LARZ-REEL operate at 120 kbps with elevated receiver hysteresis (650 mV), suitable for noise-tolerant applications with reduced bandwidth requirements. Extended temperature range (-40°C ~ 85°C) is included.
All recommended substitutes maintain RS232 protocol compliance, 2/2 driver/receiver configuration, full-duplex operation, and 4.5V to 5.5V supply voltage specifications required for functional equivalence.
Frequently Asked Questions (FAQ)
Q: Can MAX232ACWE be directly replaced with MAX232ACWE+? A: Yes. MAX232ACWE+ maintains identical electrical specifications (500 mV receiver hysteresis, 200 kbps data rate, 0°C ~ 70°C operating range) and package dimensions (16-SOIC, 0.295" width). The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant).
Q: What is the difference between ADM232AARWZ and ADM232LARZ? A: Both are 16-SOIC packages with extended temperature range (-40°C ~ 85°C). ADM232AARWZ operates at 200 kbps with 400 mV receiver hysteresis, while ADM232LARZ operates at 120 kbps with 650 mV receiver hysteresis. Selection depends on required data rate and noise immunity specifications.
Q: Are packaging variants (Tube vs. Tape & Reel) electrically equivalent? A: Yes. Tube and Tape & Reel packaging variants of the same part number (e.g., ADM232AARWZ vs. ADM232AARWZ-REEL) contain identical die and electrical specifications. Packaging selection is determined by assembly process requirements and volume considerations.
Q: Can ADM232AARNZ (UMW manufacturer) be used as a substitute? A: ADM232AARNZ maintains RS232 protocol, 2/2 configuration, and 4.5V ~ 5.5V supply voltage. However, it operates at 120 kbps (vs. 200 kbps original) and uses a narrower 16-SOP package (0.154" width vs. 0.295" width). Substitution is valid only if PCB layout accommodates the different package footprint and application bandwidth requirements do not exceed 120 kbps.
Q: What compliance certifications apply to substitute parts? A: All recommended substitutes are ROHS3 compliant and REACH unaffected. The original MAX232ACWE is RoHS non-compliant. For applications requiring regulatory compliance, MAX232ACWE+ or ADM-series alternatives are required.
Q: Does receiver hysteresis variation affect substitution compatibility? A: Receiver hysteresis determines noise immunity. The original MAX232ACWE specifies 500 mV. Substitutes with lower hysteresis (400 mV in ADM202/ADM232AAR series) provide tighter input thresholds suitable for clean signal environments. Higher hysteresis (650 mV in ADM232LAR series) improves noise tolerance. Selection depends on signal integrity requirements in the target application.
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