SN75C3223EPW Equivalent & Substitute Parts

Part Overview

The SN75C3223EPW is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 20-TSSOP surface mount package. This component is classified as obsolete, with 1,275 units currently in stock. The part operates across a 3V to 5.5V supply voltage range and supports data rates up to 1 Mbps with a 500 mV receiver hysteresis specification. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for new designs and long-term supply chain continuity.

Key Parameters

Parameter	SN75C3223EPW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN75C3223EPW 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
Receiver Hysteresis: 500 mV (primary criterion)
Voltage Supply Range: 3V ~ 5.5V
Package / Case: 20-TSSOP (0.173", 4.40mm Width)
Mounting Type: Surface Mount

Acceptable Variations:

Data Rate: Substitute parts rated at 250 kbps or higher satisfy the 1 Mbps requirement
Operating Temperature: Extended ranges (-40°C ~ 85°C) are acceptable for 0°C ~ 70°C applications
Product Status: Active parts are preferred over obsolete alternatives
Packaging Format: Tube, Cut Tape, or Tape & Reel formats are interchangeable for equivalent functionality
MSL Rating: Variations in moisture sensitivity do not affect electrical compatibility

Parts Meeting Full Substitution Criteria (500 mV Hysteresis):

TRSF3223EIPWR (Texas Instruments)
MAX3223ECUP+ (Analog Devices Inc./Maxim Integrated)
MAX3223ECUP+T (Analog Devices Inc./Maxim Integrated)
ICL3222ECVZ (Renesas Electronics Corporation)
ICL3222ECVZ-T (Renesas Electronics Corporation)

Parts Meeting Functional Substitution Criteria (300 mV Hysteresis):

ICL3222CVZ (Renesas Electronics Corporation)
ICL3222CVZ-T (Renesas Electronics Corporation)

Parts with Secondary Parameter Variations:

MAX3224ECUP+ (Analog Devices Inc./Maxim Integrated)
MAX3224ECUP+T (Analog Devices Inc./Maxim Integrated)
ST3222EBTR (STMicroelectronics)

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Hysteresis	Data Rate	Supply Voltage	Temp Range	Package	Status	Inventory
SN75C3223EPW	Texas Instruments	RS232	2/2	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Obsolete	1,275
TRSF3223EIPWR	Texas Instruments	RS232	2/2	500 mV	1 Mbps	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	9,879
MAX3223ECUP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	2,100
MAX3223ECUP+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	3,608
MAX3224ECUP+	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	813
MAX3224ECUP+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	816
ST3222EBTR	STMicroelectronics	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	20-TSSOP	Active	1,256
ICL3222CVZ	Renesas Electronics Corporation	RS232	2/2	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	7,083
ICL3222CVZ-T	Renesas Electronics Corporation	RS232	2/2	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	795
ICL3222ECVZ	Renesas Electronics Corporation	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	2,300
ICL3222ECVZ-T	Renesas Electronics Corporation	RS232	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	20-TSSOP	Active	3,700

Engineering Selection Recommendations

Primary Recommendation: TRSF3223EIPWR

The TRSF3223EIPWR from Texas Instruments is the optimal substitute. It maintains identical electrical specifications to the SN75C3223EPW, including 500 mV receiver hysteresis, 1 Mbps data rate capability, and 3V to 5.5V supply voltage range. The part is active with extended operating temperature range (-40°C to 85°C), providing superior reliability for applications originally designed for the SN75C3223EPW. Both parts share the same 20-TSSOP package footprint and are ROHS3 compliant. Inventory availability is substantial at 9,879 units.

Secondary Recommendations: MAX3223ECUP+, MAX3223ECUP+T, ICL3222ECVZ, ICL3222ECVZ-T

These parts maintain the critical 500 mV receiver hysteresis specification and identical 2/2 full-duplex RS232 configuration. Data rate is specified at 250 kbps, which satisfies applications requiring up to 1 Mbps operation. All are active products with ROHS3 compliance and 20-TSSOP packaging. Operating temperature ranges match the original part (0°C to 70°C). These alternatives provide cross-manufacturer options with adequate inventory levels.

Tertiary Recommendations: MAX3224ECUP+, MAX3224ECUP+T, ST3222EBTR

These parts are functionally compatible with identical receiver hysteresis, supply voltage, and package specifications. The MAX3224 series represents a variant within the Maxim Integrated product line. ST3222EBTR from STMicroelectronics offers extended temperature range (-40°C to 85°C) and is active. All maintain ROHS3 compliance and 20-TSSOP packaging.

Alternative Consideration: ICL3222CVZ, ICL3222CVZ-T

These Renesas parts feature 300 mV receiver hysteresis instead of 500 mV. This represents a tighter input threshold specification, which may affect noise immunity in applications with marginal signal quality. Selection should be based on specific circuit requirements and signal integrity analysis.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate specification (250 kbps vs. 1 Mbps)?

A: Yes. The SN75C3223EPW is rated for 1 Mbps maximum, but substitute parts rated at 250 kbps are backward compatible. The actual data rate in your application is determined by your circuit design and communication protocol, not the component's maximum rating. A 250 kbps-rated part operates correctly at lower speeds.

Q: What is the significance of receiver hysteresis in RS232 transceivers?

A: Receiver hysteresis defines the input threshold window for logic level detection. The SN75C3223EPW specifies 500 mV hysteresis. Substitutes with identical 500 mV hysteresis (TRSF3223EIPWR, MAX3223ECUP+, MAX3223ECUP+T, MAX3224ECUP+, MAX3224ECUP+T, ICL3222ECVZ, ICL3222ECVZ-T) provide equivalent noise immunity. Parts with 300 mV hysteresis (ICL3222CVZ, ICL3222CVZ-T) have tighter thresholds and may require signal integrity verification.

Q: Are packaging format differences (Tube vs. Tape & Reel) electrically significant?

A: No. Tube, Cut Tape, and Tape & Reel packaging formats contain identical die and electrical specifications. The packaging format affects only handling, storage, and assembly processes. Selection should be based on your manufacturing equipment and supply chain requirements.

Q: Why is the TRSF3223EIPWR recommended over other alternatives?

A: The TRSF3223EIPWR is manufactured by Texas Instruments, the original manufacturer of the SN75C3223EPW. It maintains all critical electrical parameters, including 500 mV hysteresis and 1 Mbps data rate capability. The part is active with extended temperature range and high inventory availability, ensuring long-term supply continuity.

Q: Can I use a substitute with an extended operating temperature range in an application designed for 0°C to 70°C?

A: Yes. Parts rated for -40°C to 85°C (TRSF3223EIPWR, ST3222EBTR) are fully compatible with applications specified for 0°C to 70°C. The extended range provides additional design margin and reliability. No circuit modifications are required.

Q: What compliance certifications should I verify for my application?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original SN75C3223EPW. Verify that your specific application requirements align with these certifications. MSL (Moisture Sensitivity Level) ratings vary; confirm compatibility with your assembly and storage processes.

Q: Are there any pin-compatible alternatives outside the listed substitutes?

A: The substitutes listed are based strictly on the provided electrical and mechanical parameters. All maintain the 20-TSSOP package footprint and 2/2 full-duplex RS232 configuration. Pin compatibility is assured for all listed parts.

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