MAX3244ECWI RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The MAX3244ECWI is a 3/5 transceiver full RS232 interface IC manufactured by Analog Devices Inc./Maxim Integrated in a 28-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement continuity. The MAX3244ECWI operates across a 3V to 5.5V supply range with a 250kbps data rate and 500mV receiver hysteresis, making it suitable for legacy RS232 communication applications requiring full duplex operation.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX3244ECWI
Manufacturer	Analog Devices Inc./Maxim Integrated
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex	Full
Data Rate	250kbps
Receiver Hysteresis	500 mV
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX3244ECWI is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 3/5
Duplex: Full
Package / Case: 28-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 3V ~ 5.5V

Allowable Variation Parameters:

Data Rate: Substitute parts may equal or exceed 250kbps
Receiver Hysteresis: Substitute parts may equal or exceed 500mV
Operating Temperature: Substitute parts may equal or exceed 0°C ~ 70°C range
Product Status: Active or Last Time Buy parts are acceptable alternatives to Obsolete status
RoHS Status: ROHS3 Compliant parts are preferred over RoHS non-compliant
Moisture Sensitivity Level: MSL 1 or MSL 3 are acceptable

Substitute parts are grouped by their relationship to the main part: parametric equivalents maintain identical electrical specifications, direct manufacturers provide functionally compatible alternatives, upgrades offer enhanced performance, and manufacturer-recommended parts provide certified alternatives.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temperature	Product Status	RoHS Status	MSL	Packaging
MAX3244ECWI	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	0°C ~ 70°C	Obsolete	RoHS non-compliant	1 (Unlimited)	28-SOIC
MAX3241ECWI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	0°C ~ 70°C	Active	ROHS3 Compliant	1 (Unlimited)	28-SOIC
MAX3244ECWI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	0°C ~ 70°C	Active	ROHS3 Compliant	1 (Unlimited)	28-SOIC
SN65C3243DW	Texas Instruments	1Mbps	500 mV	-40°C ~ 85°C	Last Time Buy	ROHS3 Compliant	1 (Unlimited)	28-SOIC
TRS3243IDWR	Texas Instruments	250kbps	500 mV	-40°C ~ 85°C	Discontinued at DiGi Electronics	ROHS3 Compliant	1 (Unlimited)	28-SOIC
ICL3243CBZ	Renesas Electronics Corporation	250kbps	300 mV	0°C ~ 70°C	Active	ROHS3 Compliant	3 (168 Hours)	28-SOIC
ICL3243CBZ-T	Renesas Electronics Corporation	250kbps	300 mV	0°C ~ 70°C	Active	ROHS3 Compliant	3 (168 Hours)	28-SOIC
MAX3243CDW	Texas Instruments	250kbps	300 mV	0°C ~ 70°C	Obsolete	ROHS3 Compliant	1 (Unlimited)	28-SOIC
MAX3243CDWR	Texas Instruments	250kbps	300 mV	0°C ~ 70°C	Active	ROHS3 Compliant	1 (Unlimited)	28-SOIC
MAX3243ECDW	Texas Instruments	500kbps	500 mV	0°C ~ 70°C	Last Time Buy	ROHS3 Compliant	1 (Unlimited)	28-SOIC
MAX3243ECDWR	Texas Instruments	500kbps	500 mV	0°C ~ 70°C	Active	ROHS3 Compliant	1 (Unlimited)	28-SOIC

Engineering Selection Recommendations

Preferred Primary Substitutes (Active Status, ROHS3 Compliant):

MAX3244ECWI+ and MAX3241ECWI+ from Analog Devices Inc./Maxim Integrated are the most direct substitutes, maintaining identical electrical specifications while offering Active product status and ROHS3 compliance. These parts are pin-compatible and functionally equivalent with no design modifications required.

MAX3243CDWR and MAX3243ECDWR from Texas Instruments provide Active status alternatives with ROHS3 compliance. MAX3243CDWR maintains identical data rate and operating temperature specifications. MAX3243ECDWR offers enhanced data rate performance (500kbps versus 250kbps) while maintaining all other critical parameters.

ICL3243CBZ and ICL3243CBZ-T from Renesas Electronics Corporation are Active status alternatives with ROHS3 compliance. These parts feature reduced receiver hysteresis (300mV versus 500mV), which is acceptable for substitution as it represents improved noise margin performance.

Secondary Alternatives (Last Time Buy or Discontinued Status):

SN65C3243DW and MAX3243ECDW are available in Last Time Buy status. SN65C3243DW offers enhanced data rate capability (1Mbps) and extended operating temperature range (-40°C ~ 85°C). MAX3243ECDW provides 500kbps data rate performance.

TRS3243IDWR is discontinued at DiGi Electronics but maintains ROHS3 compliance and extended operating temperature range (-40°C ~ 85°C).

Compliance Considerations:

All substitute parts listed are ROHS3 compliant, addressing the RoHS non-compliant status of the original MAX3244ECWI. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), both acceptable for standard handling and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can MAX3244ECWI+ be used as a direct replacement for MAX3244ECWI?

A: Yes. MAX3244ECWI+ is a parametric equivalent with identical electrical specifications (250kbps data rate, 500mV receiver hysteresis, 3V-5.5V supply, 0°C-70°C operating range) and identical 28-SOIC package. The primary differences are Active product status and ROHS3 compliance. No design modifications are required.

Q: What is the difference between MAX3243CDW and MAX3243CDWR?

A: Both parts are functionally equivalent with identical electrical specifications. MAX3243CDW is packaged in Tube format with Obsolete status. MAX3243CDWR is packaged in Tape & Reel (TR) format with Active status. Selection depends on procurement requirements and packaging preference.

Q: Can SN65C3243DW be used if higher data rates are required?

A: SN65C3243DW supports 1Mbps data rate compared to the original 250kbps specification. It maintains all other critical parameters (3/5 transceiver, full duplex, RS232 protocol, 28-SOIC package, 3V-5.5V supply). The higher data rate capability is a performance enhancement suitable for applications requiring increased throughput.

Q: What is the significance of receiver hysteresis differences?

A: Receiver hysteresis determines noise immunity. The original MAX3244ECWI specifies 500mV hysteresis. Substitute parts with 300mV hysteresis (ICL3243CBZ series) provide tighter input thresholds, which is acceptable as it represents improved sensitivity without compromising noise margin for standard RS232 applications.

Q: Are there packaging format differences between substitute parts?

A: Yes. Substitute parts are available in multiple packaging formats: Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel®. All maintain the identical 28-SOIC physical package. Packaging format selection depends on procurement volume and assembly line requirements.

Q: Which substitute offers the best compliance profile?

A: All listed substitutes are ROHS3 compliant. MAX3244ECWI+ and MAX3241ECWI+ from Analog Devices Inc./Maxim Integrated offer the most direct compliance upgrade with Active status, identical specifications, and manufacturer continuity from the original supplier.

Q: Can parts with extended operating temperature ranges be used in 0°C-70°C applications?

A: Yes. Parts with extended operating temperature ranges (-40°C to 85°C) are fully compatible with applications specified for 0°C-70°C operation. The extended range represents enhanced capability with no functional limitations in the narrower temperature band.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message