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MAX232DWR Equivalent & Substitute Parts
Part Overview
The MAX232DWR is a 2/2 transceiver full RS232 interface IC in 16-SOIC surface mount packaging manufactured by Texas Instruments. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The MAX232DWR operates within a 4.5V to 5.5V supply voltage range with a 120Kbps data rate and 500mV receiver hysteresis, serving as a standard RS232 line driver and receiver for serial communication applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX232DWR |
| Manufacturer | Texas Instruments |
| Category | Interface |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 2/2 |
| Duplex | Full |
| Receiver Hysteresis | 500 mV |
| Data Rate | 120Kbps |
| 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 | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the MAX232DWR is determined by strict adherence to the following critical parameters:
Primary Substitution Criteria:
- Protocol: RS232
- Number of Drivers/Receivers: 2/2
- Duplex: Full
- Package / Case: 16-SOIC (0.295", 7.50mm Width)
- Voltage - Supply: 4.5V ~ 5.5V
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
Secondary Compatibility Parameters:
- Receiver Hysteresis: 500 mV (allowable variance within transceiver specifications)
- Data Rate: 120Kbps minimum
- Operating Temperature: Must encompass or exceed 0°C ~ 70°C range
Substitute parts are grouped into three categories based on their relationship to the MAX232DWR:
MFR Recommended Substitutes: Parts explicitly recommended by the original manufacturer as direct replacements with enhanced specifications or extended operating ranges.
Parametric Equivalents: Parts meeting all critical electrical and mechanical parameters with identical or superior performance characteristics.
Direct Equivalents: Parts from alternative manufacturers offering identical functional specifications and package compatibility.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Drivers/Receivers | Data Rate | Operating Temp | Receiver Hysteresis | Supply Voltage | Package | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| MAX232DWR | Texas Instruments | Obsolete | 2/2 | 120Kbps | 0°C ~ 70°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| MAX232IDWR | Texas Instruments | Active | 2/2 | 120Kbps | -40°C ~ 85°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| TRS202ECDWR | Texas Instruments | Obsolete | 2/2 | 120Kbps | 0°C ~ 70°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| TRS232DWR | Texas Instruments | Obsolete | 2/2 | 120Kbps | 0°C ~ 70°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| HIN232CBZ | Renesas Electronics | Active | 2/2 | 120Kbps | 0°C ~ 70°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| MAX232CWE+ | Analog Devices Inc./Maxim | Active | 2/2 | 120Kbps | 0°C ~ 70°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| MAX232EEWE+T | Analog Devices Inc./Maxim | Active | 2/2 | 120Kbps | -40°C ~ 85°C | 500 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| ADM202EARWZ | Analog Devices Inc. | Active | 2/2 | 230kbps | -40°C ~ 85°C | 650 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| ADM202EARWZ-REEL | Analog Devices Inc. | Active | 2/2 | 230kbps | -40°C ~ 85°C | 650 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| ADM202JRWZ | Analog Devices Inc. | Active | 2/2 | — | 0°C ~ 70°C | 400 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
| ADM202JRWZ-REEL | Analog Devices Inc. | Active | 2/2 | — | 0°C ~ 70°C | 400 mV | 4.5V ~ 5.5V | 16-SOIC | ROHS3 |
Engineering Selection Recommendations
Primary Recommendation - MFR Recommended Substitute:
MAX232IDWR is the preferred direct replacement for MAX232DWR. This part is manufactured by Texas Instruments, the original manufacturer, and carries active product status. It maintains identical electrical specifications including 2/2 drivers/receivers, 120Kbps data rate, and 500mV receiver hysteresis. The operating temperature range extends from -40°C to 85°C, providing superior thermal coverage compared to the original 0°C to 70°C specification. All compliance certifications including ROHS3, REACH Unaffected, and EAR99 classification are maintained.
Alternative Recommendations - Parametric Equivalents:
TRS202ECDWR and TRS232DWR are parametric equivalents from Texas Instruments with identical electrical and mechanical specifications to the MAX232DWR. Both parts maintain the 0°C to 70°C operating temperature range and 500mV receiver hysteresis. These parts are classified as obsolete but remain functionally equivalent for applications requiring the original temperature specification.
Active Manufacturer Alternatives:
HIN232CBZ from Renesas Electronics Corporation provides direct functional equivalence with active product status. Operating temperature range matches the original specification at 0°C to 70°C with identical 500mV receiver hysteresis and 120Kbps data rate.
MAX232CWE+ from Analog Devices Inc./Maxim Integrated offers active product status with identical specifications across all critical parameters. Operating temperature remains 0°C to 70°C with 500mV receiver hysteresis.
MAX232EEWE+T from Analog Devices Inc./Maxim Integrated provides extended operating temperature range (-40°C to 85°C) while maintaining all other electrical specifications identical to the original part.
Enhanced Performance Alternatives:
ADM202EARWZ and ADM202EARWZ-REEL from Analog Devices Inc. offer enhanced specifications with 230kbps data rate (versus 120Kbps) and extended operating temperature range (-40°C to 85°C). Receiver hysteresis is specified at 650mV, which remains within acceptable transceiver tolerance ranges. These parts are available in both tube and tape & reel packaging options.
ADM202JRWZ and ADM202JRWZ-REEL from Analog Devices Inc. maintain the 0°C to 70°C operating temperature range with 400mV receiver hysteresis specification. Both tube and tape & reel packaging options are available.
Frequently Asked Questions (FAQ)
Q: Can MAX232IDWR be used as a direct drop-in replacement for MAX232DWR?
A: Yes. MAX232IDWR is the MFR recommended substitute from Texas Instruments. It maintains identical electrical specifications for drivers/receivers count, data rate, receiver hysteresis, supply voltage, and package configuration. The extended operating temperature range (-40°C to 85°C) provides additional thermal margin beyond the original 0°C to 70°C specification.
Q: What is the difference between MAX232CWE+ and MAX232EEWE+T?
A: Both parts are from Analog Devices Inc./Maxim Integrated and maintain identical electrical specifications. The primary difference is operating temperature range: MAX232CWE+ operates 0°C to 70°C, while MAX232EEWE+T extends to -40°C to 85°C. Packaging differs as well: MAX232CWE+ is supplied in tube, while MAX232EEWE+T is supplied in cut tape format.
Q: Are ADM202 series parts fully compatible with MAX232DWR?
A: ADM202 series parts meet all critical substitution criteria including 2/2 drivers/receivers, RS232 protocol, full duplex operation, 16-SOIC package, and 4.5V to 5.5V supply voltage. ADM202EARWZ variants offer enhanced data rate (230kbps versus 120Kbps) and extended temperature range. ADM202JRWZ variants match the original 0°C to 70°C temperature range. Receiver hysteresis specifications differ slightly (650mV or 400mV versus 500mV) but remain within acceptable transceiver operating parameters.
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel, Tube, and Tape & Reel (TR). Selection depends on procurement volume and assembly requirements. ADM202 series parts offer both tube and tape & reel options. MAX232EEWE+T is supplied in cut tape format. HIN232CBZ and MAX232CWE+ are supplied in tube packaging.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed maintain ROHS3 compliance status identical to the original MAX232DWR. All parts are also REACH Unaffected and classified as EAR99 for export control purposes.
Q: Which substitute part offers the widest operating temperature range?
A: MAX232IDWR, MAX232EEWE+T, ADM202EARWZ, and ADM202EARWZ-REEL all provide extended operating temperature range from -40°C to 85°C, compared to the original 0°C to 70°C specification.
Q: Can I use HIN232CBZ as a substitute if my application requires 0°C to 70°C operation?
A: Yes. HIN232CBZ from Renesas Electronics Corporation operates within the 0°C to 70°C temperature range and maintains all critical electrical specifications including 2/2 drivers/receivers, 120Kbps data rate, 500mV receiver hysteresis, and 16-SOIC package configuration.
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