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MAX3244ECAI RS232 Transceiver Equivalent & Substitute Parts
Part Overview
The MAX3244ECAI is a full-duplex RS232 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated, configured with 3 drivers and 5 receivers in a 28-SSOP surface mount package. This component is classified as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across 3V to 5.5V supply voltage with a 250kbps data rate and 500mV receiver hysteresis, suitable for legacy RS232 communication applications requiring full-duplex operation.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX3244ECAI |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Type | Transceiver |
| Protocol | RS232 |
| Number of Drivers/Receivers | 3/5 |
| Duplex | Full |
| Data Rate | 250kbps |
| Voltage - Supply | 3V ~ 5.5V |
| Operating Temperature | 0°C ~ 70°C |
| Package / Case | 28-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Receiver Hysteresis | 500 mV |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the MAX3244ECAI is determined by strict equivalence across the following critical parameters:
- Protocol: RS232
- Number of Drivers/Receivers: 3/5 (primary equivalents) or 2/2 (functional alternative)
- Duplex: Full
- Data Rate: 250kbps or higher
- Voltage - Supply: 3V ~ 5.5V
- Package / Case: 28-SSOP (0.209", 5.30mm Width)
- Mounting Type: Surface Mount
- Receiver Hysteresis: 300mV or 500mV acceptable
Substitute parts are categorized as follows:
Parametric Equivalents (Same Drivers/Receivers Configuration): MAX3241ECAI+, MAX3243ECAI+, MAX3244CAI+, MAX3244ECAI+, and ICL3244EIAZ-T maintain identical 3/5 driver/receiver configuration with matching electrical specifications and package geometry.
Functional Alternative (Reduced Driver/Receiver Count): MAX3250CAI+ provides 2/2 configuration in the same package and voltage range, suitable for applications requiring fewer communication channels.
Cross-Manufacturer Direct Substitutes: MAX3243CDBR (Texas Instruments), MAX3243CDB (Texas Instruments), SP3243EBCA-L/TR (MaxLinear), and SP3243EUCA-L/TR (MaxLinear) offer equivalent 3/5 transceiver functionality with identical package specifications and electrical performance within acceptable parameter tolerances.
Parameter Comparison
| Part Number | Manufacturer | Drivers/Receivers | Data Rate | Receiver Hysteresis | Operating Temp | Product Status | RoHS Status | Package |
|---|---|---|---|---|---|---|---|---|
| MAX3244ECAI | Analog Devices | 3/5 | 250kbps | 500mV | 0°C ~ 70°C | Obsolete | Non-compliant | 28-SSOP |
| MAX3241ECAI+ | Analog Devices | 3/5 | 250kbps | 500mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| MAX3243ECAI+ | Analog Devices | 3/5 | 250kbps | 500mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| MAX3244CAI+ | Analog Devices | 3/5 | 250kbps | 500mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| MAX3244ECAI+ | Analog Devices | 3/5 | 250kbps | 500mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| MAX3250CAI+ | Analog Devices | 2/2 | 250kbps | 500mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| ICL3244EIAZ-T | Renesas Electronics | 3/5 | 250kbps | 500mV | -40°C ~ 85°C | Active | ROHS3 Compliant | 28-SSOP |
| MAX3243CDB | Texas Instruments | 3/5 | 250kbps | 300mV | 0°C ~ 70°C | Obsolete | ROHS3 Compliant | 28-SSOP |
| MAX3243CDBR | Texas Instruments | 3/5 | 250kbps | 300mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
| SP3243EBCA-L/TR | MaxLinear, Inc. | 3/5 | 250kbps | 300mV | 0°C ~ 70°C | Active | RoHS Compliant | 28-SSOP |
| SP3243EUCA-L/TR | MaxLinear, Inc. | 3/5 | 1Mbps | 300mV | 0°C ~ 70°C | Active | ROHS3 Compliant | 28-SSOP |
Engineering Selection Recommendations
For direct replacement of the obsolete MAX3244ECAI, select from active Analog Devices parts: MAX3241ECAI+, MAX3243ECAI+, MAX3244CAI+, or MAX3244ECAI+. These maintain identical electrical specifications and RoHS3 compliance, ensuring regulatory alignment for new designs and procurement.
The Renesas ICL3244EIAZ-T provides an active cross-manufacturer equivalent with extended operating temperature range (-40°C to 85°C) and RoHS3 compliance, suitable for applications requiring broader thermal performance.
Texas Instruments MAX3243CDBR and MaxLinear SP3243EBCA-L/TR or SP3243EUCA-L/TR offer active alternatives with RoHS compliance. Note that these parts specify 300mV receiver hysteresis versus the original 500mV specification. SP3243EUCA-L/TR additionally supports 1Mbps data rate, providing enhanced performance headroom.
For applications requiring reduced channel count, MAX3250CAI+ provides a 2/2 driver/receiver configuration in the same 28-SSOP package with full RoHS3 compliance and active product status.
All recommended substitutes maintain 3V to 5.5V supply voltage compatibility and 28-SSOP surface mount packaging, ensuring PCB layout and thermal management consistency.
Frequently Asked Questions (FAQ)
Q: Can MAX3244ECAI be directly replaced with MAX3244ECAI+?
A: Yes. MAX3244ECAI+ is the active equivalent with identical electrical specifications, 3/5 driver/receiver configuration, 250kbps data rate, and 28-SSOP package. The primary difference is product status (Active vs. Obsolete) and RoHS3 compliance.
Q: What is the difference between 500mV and 300mV receiver hysteresis?
A: Receiver hysteresis defines the voltage differential required to switch receiver output states. The original MAX3244ECAI specifies 500mV; substitute parts from Texas Instruments and MaxLinear specify 300mV. Both values are within acceptable RS232 receiver specifications and do not affect functional compatibility in standard applications.
Q: Is ICL3244EIAZ-T suitable for the original operating temperature range?
A: ICL3244EIAZ-T supports -40°C to 85°C, which exceeds the original 0°C to 70°C specification. This part is suitable for the original temperature range and provides additional thermal margin for extended-temperature applications.
Q: Can MAX3250CAI+ replace MAX3244ECAI in all applications?
A: MAX3250CAI+ provides 2/2 driver/receiver configuration versus the original 3/5. This part is suitable only for applications requiring two communication channels or fewer. Applications requiring three drivers and five receivers must use 3/5 equivalent parts.
Q: What is the MSL (Moisture Sensitivity Level) difference between parts?
A: MAX3244ECAI specifies MSL 1 (Unlimited); ICL3244EIAZ-T and MaxLinear parts specify MSL 2 (1 Year). MSL 2 requires controlled storage and handling within one year of manufacture. This does not affect electrical performance but impacts supply chain and storage procedures.
Q: Are all substitute parts RoHS compliant?
A: Analog Devices and Renesas parts are ROHS3 Compliant. Texas Instruments and MaxLinear parts are RoHS Compliant. All meet current RoHS requirements for new designs.
Q: Does SP3243EUCA-L/TR's 1Mbps data rate affect compatibility?
A: SP3243EUCA-L/TR supports 1Mbps, which exceeds the original 250kbps specification. This part is backward compatible and suitable for applications operating at 250kbps or lower data rates, with performance headroom for future upgrades.
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