SN65C3222EPW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The SN65C3222EPW is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 20-TSSOP surface mount package. This part is classified as obsolete, with 3,216 units currently in stock. The SN65C3222EPW operates across a 3V to 5.5V supply range and supports data rates up to 1 Mbps with a receiver hysteresis of 300 mV. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and long-term component availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	SN65C3222EPW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1 Mbps
Receiver Hysteresis	300 mV
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SN65C3222EPW 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
Voltage Supply Range: 3V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 20-TSSOP (0.173", 4.40mm Width)

Allowable Variations:

Data Rate: Substitute parts may operate at 250 kbps or 1 Mbps (higher data rates are backward compatible)
Receiver Hysteresis: 300 mV or 500 mV (both acceptable for RS232 applications)
Operating Temperature: Extended range (-40°C ~ 85°C) or commercial range (0°C ~ 70°C)
Product Status: Active or Last Time Buy preferred over obsolete

Substitute parts are grouped into two categories: parametric equivalents from Texas Instruments and direct substitutes from alternative manufacturers (Analog Devices Inc./Maxim Integrated, MaxLinear Inc., STMicroelectronics, and Renesas Electronics Corporation).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	Inventory
SN65C3222EPW	Texas Instruments	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Obsolete	3,216 Pcs
SN65C3222PW	Texas Instruments	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Last Time Buy	960 Pcs
MAX3222EEUP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	1 Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	2,987 Pcs
MAX3222EEUP+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	1 Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	45,400 Pcs
MAX3222EEUP/V+	Analog Devices Inc./Maxim Integrated	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	774 Pcs
SP3222EBEY-L/TR	MaxLinear, Inc.	RS232	2/2	250 kbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	782 Pcs
ST3222EBTR	STMicroelectronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	1,256 Pcs
ICL3222CVZ	Renesas Electronics Corporation	RS232	2/2	250 kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	7,083 Pcs
ICL3222CVZ-T	Renesas Electronics Corporation	RS232	2/2	250 kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	795 Pcs
ICL3222ECAZ	Renesas Electronics Corporation	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	1,628 Pcs
ICL3222ECAZ-T	Renesas Electronics Corporation	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	20-SSOP	Active	3,050 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Parametric Equivalents (Recommended):

SN65C3222PW from Texas Instruments is the primary parametric equivalent, maintaining identical electrical specifications and the same 20-TSSOP package. This part carries Last Time Buy status with adequate inventory (960 units). It is ROHS3 compliant with MSL 1 rating, matching the original part's compliance profile.

Tier 2 - Active Substitutes with Full Compatibility:

MAX3222EEUP+T (Analog Devices Inc./Maxim Integrated) provides the highest inventory availability (45,400 units) while maintaining 1 Mbps data rate capability and extended temperature range (-40°C ~ 85°C). The 500 mV receiver hysteresis is within acceptable RS232 specifications. This part is ROHS3 compliant and carries Active product status.

MAX3222EEUP+ offers identical electrical performance to MAX3222EEUP+T with 2,987 units in stock, packaged in Tube format.

Tier 3 - Active Substitutes with Reduced Data Rate:

SP3222EBEY-L/TR (MaxLinear, Inc.), ST3222EBTR (STMicroelectronics), ICL3222CVZ (Renesas Electronics Corporation), and ICL3222CVZ-T (Renesas Electronics Corporation) operate at 250 kbps, which is backward compatible with the original 1 Mbps specification. All maintain the 20-TSSOP package, 3V ~ 5.5V supply range, and full-duplex 2/2 configuration. These parts carry Active product status with ROHS3 compliance.

Tier 4 - Package Variant Substitutes:

ICL3222ECAZ and ICL3222ECAZ-T from Renesas Electronics Corporation use a 20-SSOP package (0.209", 5.30mm Width) instead of 20-TSSOP. These are suitable only if PCB layout accommodates the wider package footprint. Both are ROHS3 compliant with Active status.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the original part's regulatory status. Moisture sensitivity levels vary between MSL 1 (unlimited) and MSL 3 (168 hours), which may affect storage and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX3222EEUP+T directly replace SN65C3222EPW without PCB modifications?

A: Yes. Both parts use the 20-TSSOP package with identical pinout and electrical interface. The 500 mV receiver hysteresis of the MAX3222EEUP+T is within RS232 specification tolerances and does not require circuit modifications.

Q: What is the difference between MAX3222EEUP+ and MAX3222EEUP+T?

A: Both parts are electrically identical. MAX3222EEUP+T is packaged in Cut Tape (CT) & Digi-Reel format with significantly higher inventory (45,400 units), while MAX3222EEUP+ is supplied in Tube packaging (2,987 units). Selection depends on procurement and assembly requirements.

Q: Why do some substitutes operate at 250 kbps instead of 1 Mbps?

A: The 250 kbps data rate is a lower specification that remains fully compatible with 1 Mbps applications. RS232 communication is backward compatible; devices rated for lower speeds function correctly in systems designed for higher speeds.

Q: Can ICL3222ECAZ replace SN65C3222EPW?

A: ICL3222ECAZ uses a 20-SSOP package (0.209", 5.30mm Width) instead of the 20-TSSOP package (0.173", 4.40mm Width). Direct PCB substitution is not possible without layout redesign. However, the electrical specifications are compatible.

Q: What is the significance of MSL ratings in these parts?

A: Moisture Sensitivity Level (MSL) determines storage and handling requirements. SN65C3222EPW and SN65C3222PW carry MSL 1 (unlimited shelf life). Substitutes with MSL 3 (168 hours) require controlled humidity storage and have a limited floor life after moisture exposure. Verify storage conditions match your supply chain capabilities.

Q: Is SN65C3222PW a better choice than MAX3222EEUP+T?

A: SN65C3222PW maintains identical specifications to the original part and carries Last Time Buy status, making it suitable for short-term production runs. MAX3222EEUP+T offers superior long-term availability (45,400 units) and Active product status, making it preferable for ongoing production or new designs.

Q: Do all substitute parts maintain the -40°C ~ 85°C operating temperature range?

A: No. Renesas ICL3222 series parts (ICL3222CVZ, ICL3222CVZ-T, ICL3222ECAZ, ICL3222ECAZ-T) operate within 0°C ~ 70°C. These are suitable only for applications within this narrower temperature range. For extended temperature applications, select MAX3222EEUP+, MAX3222EEUP+T, SP3222EBEY-L/TR, or ST3222EBTR.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification, matching the original SN65C3222EPW regulatory status.

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