SN75C3222EDB Equivalent & Substitute Parts

Part Overview

The SN75C3222EDB is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 20-SSOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The SN75C3222EDB operates across a 3V to 5.5V supply range with a 1Mbps data rate and 300mV receiver hysteresis, designed for standard RS232 serial communication applications requiring dual driver and dual receiver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN75C3222EDB
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Voltage - Supply	3V ~ 5.5V
Data Rate	1Mbps
Receiver Hysteresis	300 mV
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SN75C3222EDB is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 20-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 3V ~ 5.5V

Allowable Variations:

Data Rate: Substitute parts may operate at 250kbps or 1Mbps (both support the SN75C3222EDB's 1Mbps requirement)
Receiver Hysteresis: 300mV or 500mV (both provide adequate noise margin)
Operating Temperature: Extended range (-40°C ~ 85°C) is acceptable for 0°C ~ 70°C applications
Packaging Format: Tube, Tape & Reel (TR), or Cut Tape (CT) formats are interchangeable for component selection
MSL Rating: Higher MSL ratings (MSL 2 or MSL 3) are acceptable for MSL 1 applications

All substitute parts listed are active products from established manufacturers with ROHS3 compliance and EAR99 classification matching the original part.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Operating Temperature	Packaging	MSL
SN75C3222EDB	Texas Instruments	Obsolete	1Mbps	300 mV	0°C ~ 70°C	20-SSOP	1
MAX3222ECAP+	Analog Devices Inc./Maxim Integrated	Active	1Mbps	500 mV	0°C ~ 70°C	20-SSOP	1
MAX3222ECAP+T	Analog Devices Inc./Maxim Integrated	Active	1Mbps	500 mV	0°C ~ 70°C	20-SSOP	1
ST3222ECPR	STMicroelectronics	Active	250kbps	500 mV	0°C ~ 70°C	20-SSOP	3
ICL3222ECAZ	Renesas Electronics Corporation	Active	250kbps	500 mV	0°C ~ 70°C	20-SSOP	3
ICL3222ECAZ-T	Renesas Electronics Corporation	Active	250kbps	500 mV	0°C ~ 70°C	20-SSOP	3
MAX3222EEAP+	Analog Devices Inc./Maxim Integrated	Active	1Mbps	500 mV	-40°C ~ 85°C	20-SSOP	1
MAX3222EEAP+T	Analog Devices Inc./Maxim Integrated	Active	1Mbps	500 mV	-40°C ~ 85°C	20-SSOP	1
SP3222EBEA-L/TR	MaxLinear, Inc.	Active	250kbps	300 mV	-40°C ~ 85°C	20-SSOP	2
SP3222ECA-L/TR	MaxLinear, Inc.	Active	235Kbps	300 mV	0°C ~ 70°C	20-SSOP	2
SP3222EEA-L/TR	MaxLinear, Inc.	Active	235Kbps	300 mV	-40°C ~ 85°C	20-SSOP	2

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and maintain the same electrical interface specifications required for RS232 2/2 full-duplex transceiver applications. Selection should prioritize active product status to ensure long-term availability and manufacturing support.

For applications requiring 1Mbps data rate performance with standard operating temperature range (0°C ~ 70°C), the MAX3222ECAP+ and MAX3222ECAP+T variants from Analog Devices Inc./Maxim Integrated provide direct functional equivalence with MSL 1 moisture sensitivity rating.

For applications with extended temperature requirements (-40°C ~ 85°C), the MAX3222EEAP+ and MAX3222EEAP+T variants maintain 1Mbps data rate capability with enhanced thermal performance.

For cost-optimized applications where data rates below 250kbps are acceptable, the ST3222ECPR from STMicroelectronics, ICL3222ECAZ and ICL3222ECAZ-T from Renesas Electronics Corporation, and SP3222 series from MaxLinear, Inc. provide functional alternatives with active product status.

All substitute parts maintain identical 20-SSOP package geometry and surface mount compatibility with the original SN75C3222EDB design.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the SN75C3222EDB's 1Mbps specification?

A: Yes. Substitute parts rated at 250kbps or 235Kbps are functionally compatible because they support communication at the SN75C3222EDB's 1Mbps rate. The data rate specification indicates maximum capability; lower-rated parts operate at reduced maximum speeds but remain compatible with slower communication protocols.

Q: What is the difference between receiver hysteresis values of 300mV and 500mV?

A: Both values provide adequate noise immunity for RS232 applications. The 500mV hysteresis in many substitute parts offers enhanced noise rejection compared to the original 300mV specification, making them suitable for electrically noisy environments.

Q: Are packaging format differences (Tube, Tape & Reel, Cut Tape) significant for component selection?

A: Packaging format affects handling and assembly processes but does not impact electrical or mechanical compatibility. Tube packaging is suitable for manual assembly or small-volume production. Tape & Reel (TR) and Cut Tape (CT) formats are optimized for automated pick-and-place assembly. Select based on your manufacturing process requirements.

Q: Can I substitute a part with extended operating temperature range (-40°C ~ 85°C) in an application specified for 0°C ~ 70°C?

A: Yes. Extended temperature range parts are fully compatible with standard temperature applications. The wider operating range provides additional design margin and is acceptable for direct substitution.

Q: What does MSL (Moisture Sensitivity Level) mean for component substitution?

A: MSL indicates moisture sensitivity during storage and handling. MSL 1 (Unlimited) parts have no moisture sensitivity restrictions. MSL 2 and MSL 3 parts require controlled storage conditions. Higher MSL ratings are acceptable for applications originally specified with lower MSL ratings, as they indicate equal or more stringent handling requirements.

Q: Are all substitute parts ROHS3 compliant like the original SN75C3222EDB?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with environmental and regulatory requirements matching the original part.

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