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MAX232EID RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The MAX232EID is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MAX232EID operates within a 4.5V to 5.5V supply voltage range with a 250kbps data rate and 500mV receiver hysteresis, designed for serial communication interface applications requiring full RS232 protocol compliance.
Substiute Parts
Key Parameters
| Parameter | MAX232EID Specification |
|---|---|
| Manufacturer | Texas Instruments |
| Type | Transceiver |
| Protocol | RS232 |
| Drivers/Receivers | 2/2 |
| Duplex | Full |
| Data Rate | 250kbps |
| Voltage Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Receiver Hysteresis | 500mV |
| Package/Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX232EID is determined by strict alignment across the following critical parameters:
Primary Substitution Criteria:
- RS232 protocol compliance with 2/2 driver/receiver configuration
- Full-duplex operation capability
- 16-SOIC package footprint compatibility (0.154" width, 3.90mm)
- Supply voltage range: 4.5V ~ 5.5V
- Operating temperature range: -40°C ~ 85°C minimum
- Surface mount technology
- ROHS3 compliance and MSL rating of 1 or better
Secondary Compatibility Factors:
- Data rate capability equal to or exceeding 250kbps
- Receiver hysteresis within acceptable tolerance (400mV to 650mV)
- Active product status preferred for long-term availability
Substitute parts are grouped into two categories: direct equivalents from Texas Instruments/Maxim Integrated (MAX232 series variants) and cross-manufacturer alternatives (ADM232 and HIN232 series) that meet all primary substitution criteria.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Data Rate | Receiver Hysteresis | Operating Temp | Package | Packaging Type |
|---|---|---|---|---|---|---|---|
| MAX232EID | Texas Instruments | Obsolete | 250kbps | 500mV | -40°C ~ 85°C | 16-SOIC (0.154") | Tube |
| MAX232EIDR | Texas Instruments | Active | 250kbps | 500mV | -40°C ~ 85°C | 16-SOIC (0.154") | Cut Tape & Digi-Reel |
| MAX232EESE+ | Analog Devices Inc./Maxim Integrated | Active | 120kbps | 500mV | -40°C ~ 85°C | 16-SOIC (0.154") | Tube |
| MAX232EESE+T | Analog Devices Inc./Maxim Integrated | Active | 120kbps | 500mV | -40°C ~ 85°C | 16-SOIC (0.154") | Cut Tape & Digi-Reel |
| ADM232AARNZ | UMW | Active | 120kbps | Not specified | -40°C ~ 85°C | 16-SOP (0.154") | Cut Tape & Digi-Reel |
| ADM232AARNZ-REEL | Analog Devices Inc. | Active | 200kbps | 400mV | -40°C ~ 85°C | 16-SOIC (0.154") | Cut Tape & Digi-Reel |
| ADM232AARNZ-REEL7 | Analog Devices Inc. | Active | 200kbps | 400mV | -40°C ~ 85°C | 16-SOIC (0.154") | Cut Tape & Digi-Reel |
| ADM232LARZ | Analog Devices Inc. | Active | 120kbps | 650mV | -40°C ~ 85°C | 16-SOIC (0.295") | Tube |
| ADM232LARZ-REEL | Analog Devices Inc. | Active | 120kbps | 650mV | -40°C ~ 85°C | 16-SOIC (0.295") | Cut Tape & Digi-Reel |
| HIN232ACBNZ | Renesas Electronics Corporation | Active | 230kbps | 500mV | 0°C ~ 70°C | 16-SOIC (0.154") | Tube |
| HIN232ACBNZ-T | Renesas Electronics Corporation | Active | 230kbps | 500mV | 0°C ~ 70°C | 16-SOIC (0.154") | Cut Tape & Digi-Reel |
Engineering Selection Recommendations
Tier 1 - Direct Equivalents (Recommended Primary Substitutes):
MAX232EIDR and MAX232EESE+/MAX232EESE+T maintain full electrical and mechanical compatibility with the MAX232EID. MAX232EIDR is the active production equivalent with identical electrical specifications and packaging. Both are ROHS3 compliant with MSL rating of 1, ensuring compatibility with existing PCB designs and assembly processes. These parts are sourced from the original manufacturer lineage and carry active product status for sustained availability.
Tier 2 - Cross-Manufacturer Alternatives:
ADM232AARNZ-REEL and ADM232AARNZ-REEL7 (Analog Devices Inc.) provide functional equivalence with 200kbps data rate capability and 400mV receiver hysteresis, both within acceptable operating parameters. These parts maintain the 16-SOIC (0.154") footprint and full temperature range (-40°C ~ 85°C), ensuring PCB layout compatibility. Active product status and ROHS3 compliance support long-term design continuity.
HIN232ACBNZ and HIN232ACBNZ-T (Renesas Electronics Corporation) offer 230kbps data rate performance with 500mV receiver hysteresis matching the original specification. These parts are ROHS3 compliant and maintain the 16-SOIC (0.154") package footprint. Operating temperature range is restricted to 0°C ~ 70°C, requiring thermal environment verification before selection.
Parts Not Recommended for Direct Substitution:
ADM232LARZ and ADM232LARZ-REEL feature a wider 16-SOIC package (0.295" width) incompatible with PCB layouts designed for the 0.154" width MAX232EID. ADM232AARNZ uses 16-SOP packaging, which differs from the 16-SOIC footprint. These parts require PCB redesign and are not suitable for drop-in replacement applications.
Frequently Asked Questions (FAQ)
Q: Can MAX232EIDR be used as a direct replacement for MAX232EID?
A: Yes. MAX232EIDR is the active production equivalent with identical electrical specifications (250kbps data rate, 500mV receiver hysteresis, -40°C ~ 85°C operating range) and mechanical compatibility (16-SOIC 0.154" package). The only difference is packaging format (Cut Tape & Digi-Reel vs. Tube), which does not affect circuit performance.
Q: What is the difference between MAX232EESE+ and MAX232EESE+T?
A: Both parts are electrically identical with 120kbps data rate and 500mV receiver hysteresis. The difference is packaging: MAX232EESE+ is supplied in Tube format, while MAX232EESE+T is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly process requirements and inventory management preferences.
Q: Are ADM232 series parts compatible with MAX232EID PCB designs?
A: ADM232AARNZ-REEL and ADM232AARNZ-REEL7 are compatible with MAX232EID PCB designs. Both maintain the 16-SOIC (0.154") footprint and support the full -40°C ~ 85°C operating temperature range. Data rate is 200kbps (lower than MAX232EID's 250kbps) and receiver hysteresis is 400mV (lower than 500mV), but both remain within acceptable RS232 transceiver operating parameters. ADM232LARZ and ADM232LARZ-REEL use a wider package (0.295") and are not compatible with existing PCB layouts.
Q: Why is HIN232ACBNZ not recommended for all applications?
A: HIN232ACBNZ operates within a restricted temperature range of 0°C ~ 70°C, compared to MAX232EID's -40°C ~ 85°C range. This part is suitable only for applications with confirmed operating temperatures within 0°C ~ 70°C. Applications requiring extended low-temperature operation (-40°C) or high-temperature operation (above 70°C) must use alternative parts.
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in two packaging formats: Tube (for manual assembly or small-volume applications) and Cut Tape & Digi-Reel (for automated assembly and high-volume production). Packaging selection does not affect electrical performance and should be based on assembly process requirements and inventory management practices.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification, ensuring compatibility with environmental and regulatory requirements equivalent to the original MAX232EID specification.
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