SP208ECT-L RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SP208ECT-L is a 4/4 full-duplex RS232 transceiver manufactured by MaxLinear, Inc., housed in a 24-SOIC surface mount package. This interface IC is designed for serial communication applications requiring full RS232 protocol compliance. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers including Analog Devices Inc., Renesas Electronics Corporation, and Texas Instruments.

Key Parameters

Parameter	SP208ECT-L
Manufacturer	MaxLinear, Inc.
Type	Transceiver
Protocol	RS232
Drivers/Receivers	4/4
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	230 kbps
Supply Voltage	4.5V – 5.5V
Operating Temperature	0°C – 70°C
Package/Case	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS Compliant
MSL Rating	3 (168 Hours)
Product Status	Discontinued

Substitute Part Grouping Explanation

Substitution eligibility for the SP208ECT-L is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS232 (mandatory)
Drivers/Receivers: 4/4 configuration (mandatory)
Duplex: Full (mandatory)
Package/Case: 24-SOIC (mandatory)
Supply Voltage: 4.5V – 5.5V (mandatory)
Mounting Type: Surface Mount (mandatory)

Secondary Performance Parameters:

Data Rate: 230 kbps (SP208ECT-L specification)
Receiver Hysteresis: 500 mV (SP208ECT-L specification)
Operating Temperature: 0°C – 70°C (SP208ECT-L specification)

Substitute parts are grouped into two categories based on data rate capability:

Category A – Full Performance Match (230 kbps): Parts meeting or exceeding the 230 kbps data rate specification of the original part.

Category B – Reduced Performance (120 kbps): Parts with 120 kbps data rate, suitable for applications not requiring the full 230 kbps bandwidth.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	RoHS Status	MSL Rating
SP208ECT-L	MaxLinear, Inc.	230 kbps	500 mV	0°C – 70°C	Discontinued	RoHS Compliant	3 (168 Hours)
ADM208ARZ	Analog Devices Inc.	120 kbps	650 mV	-40°C – 85°C	Active	ROHS3 Compliant	1 (Unlimited)
ADM208ARZ-REEL	Analog Devices Inc.	120 kbps	650 mV	-40°C – 85°C	Active	ROHS3 Compliant	1 (Unlimited)
ADM208EARZ	Analog Devices Inc.	230 kbps	650 mV	-40°C – 85°C	Active	ROHS3 Compliant	1 (Unlimited)
ADM208EARZ-REEL	Analog Devices Inc.	230 kbps	650 mV	-40°C – 85°C	Active	ROHS3 Compliant	1 (Unlimited)
HIN208ECBZ-T	Renesas Electronics Corporation	230 kbps	500 mV	0°C – 70°C	Active	ROHS3 Compliant	3 (168 Hours)
MAX208CDW	Texas Instruments	120 kbps	500 mV	0°C – 70°C	Obsolete	ROHS3 Compliant	1 (Unlimited)
MAX208CDWR	Texas Instruments	120 kbps	500 mV	0°C – 70°C	Obsolete	ROHS3 Compliant	1 (Unlimited)
MAX208CWG+	Analog Devices Inc./Maxim Integrated	120 kbps	500 mV	0°C – 70°C	Active	ROHS3 Compliant	1 (Unlimited)
MAX208CWG+T	Analog Devices Inc./Maxim Integrated	120 kbps	500 mV	0°C – 70°C	Active	ROHS3 Compliant	1 (Unlimited)
MAX208ECWG+	Analog Devices Inc./Maxim Integrated	120 kbps	500 mV	0°C – 70°C	Active	ROHS3 Compliant	1 (Unlimited)

Engineering Selection Recommendations

Preferred Substitutes (Active Product Status):

For applications requiring 230 kbps data rate performance with matching operating temperature range (0°C – 70°C) and receiver hysteresis (500 mV), the HIN208ECBZ-T from Renesas Electronics Corporation is the closest functional equivalent. This part maintains identical electrical specifications and thermal operating range while offering active product status and ROHS3 compliance.

For applications requiring 230 kbps data rate with extended operating temperature range (-40°C – 85°C), the ADM208EARZ or ADM208EARZ-REEL from Analog Devices Inc. provide full performance equivalence. These parts feature higher receiver hysteresis (650 mV) and superior moisture sensitivity rating (MSL 1, Unlimited), supporting broader environmental conditions.

Alternative Substitutes (Reduced Data Rate):

For applications where 120 kbps data rate is acceptable, multiple active alternatives exist: MAX208CWG+, MAX208CWG+T, and MAX208ECWG+ from Analog Devices Inc./Maxim Integrated. These parts maintain the original operating temperature range (0°C – 70°C) and receiver hysteresis (500 mV) while offering active product status and improved moisture sensitivity ratings.

ADM208ARZ and ADM208ARZ-REEL from Analog Devices Inc. provide 120 kbps alternatives with extended temperature range (-40°C – 85°C) and superior moisture sensitivity characteristics.

Parts to Avoid:

MAX208CDW and MAX208CDWR from Texas Instruments carry obsolete product status and should not be selected for new designs despite active inventory availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 120 kbps substitute in place of the SP208ECT-L?

A: Yes, if your application does not require the full 230 kbps data rate capability. The SP208ECT-L specifies 230 kbps maximum data rate, but many RS232 serial communication applications operate at lower speeds (9600 baud, 19200 baud, 38400 baud). Verify your system's actual data rate requirement before selecting a 120 kbps alternative.

Q: What is the significance of receiver hysteresis differences?

A: Receiver hysteresis affects noise immunity during signal transitions. The SP208ECT-L specifies 500 mV hysteresis. Substitute parts with 650 mV hysteresis (ADM208 series) provide enhanced noise immunity but may require slightly higher input signal swing. This difference is typically transparent in standard RS232 applications operating within specification.

Q: Are all 24-SOIC packages mechanically identical?

A: Yes. All parts listed use the 24-SOIC (0.295", 7.50mm Width) package, ensuring mechanical compatibility with existing PCB layouts and sockets. Packaging format differences (Tube, Tape & Reel, Cut Tape) affect supply and handling only, not electrical or mechanical fit.

Q: Why should I avoid MAX208CDW and MAX208CDWR?

A: Both parts carry obsolete product status from Texas Instruments. While inventory may be available, obsolete parts lack manufacturer support, updated documentation, and long-term availability guarantees. Active alternatives from Analog Devices Inc. and Renesas Electronics Corporation are preferred for new designs and long-term production.

Q: What does MSL rating mean for my application?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient humidity before soldering. SP208ECT-L specifies MSL 3 (168 hours maximum). Most active substitutes offer MSL 1 (Unlimited), providing greater flexibility in manufacturing environments with extended storage or handling times.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet your application's electrical requirements. However, maintaining a single part number per design simplifies procurement, inventory management, and troubleshooting. If mixing is necessary, verify that all selected parts operate within identical voltage, temperature, and data rate specifications.

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