TRSF3232CDG4 Equivalent & Substitute Parts

Part Overview

The TRSF3232CDG4 is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The device operates across a 3V to 5.5V supply range with a 1Mbps data rate capability and 300mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3232CDG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	300 mV
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232CDG4 is determined by strict adherence to the following parameters:

Primary Substitution Criteria:

RS232 protocol compliance
2/2 driver/receiver configuration
Full-duplex operation
16-SOIC package footprint (0.154", 3.90mm Width)
Supply voltage range: 3V ~ 5.5V
Operating temperature range: 0°C ~ 70°C
Surface mount mounting type
ROHS3 compliance

Secondary Compatibility Parameters:

Data rate capability (minimum 250kbps; 1Mbps preferred for full compatibility)
Receiver hysteresis (300mV or 500mV acceptable)
Moisture sensitivity level (MSL 1, 2, or 3 acceptable depending on application requirements)

Substitute parts are grouped into two categories: direct functional equivalents matching all primary criteria, and parametric equivalents with minor variations in data rate or receiver hysteresis that remain functionally compatible within the specified operating envelope.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	MSL	Packaging	Inventory
TRSF3232CDG4	Texas Instruments	Obsolete	1Mbps	300 mV	1	16-SOIC	1034 Pcs
TRSF3232ECDR	Texas Instruments	Active	1Mbps	300 mV	1	16-SOIC	4666 Pcs
SP3232EUCN-L/TR	MaxLinear, Inc.	Active	1Mbps	300 mV	2	16-SOIC	32900 Pcs
SP3232EUCN-L	MaxLinear, Inc.	Active	1Mbps	300 mV	2	16-SOIC	1405 Pcs
ICL3232CBNZ	Renesas Electronics	Active	250kbps	300 mV	3	16-SOIC	9884 Pcs
ICL3232CBNZ-T	Renesas Electronics	Active	250kbps	300 mV	3	16-SOIC	1321 Pcs
ICL3232ECBNZ	Renesas Electronics	Active	250kbps	500 mV	3	16-SOIC	2342 Pcs
ICL3232ECBNZ-T	Renesas Electronics	Active	250kbps	500 mV	3	16-SOIC	17795 Pcs
SP3232EBCN-L	MaxLinear, Inc.	Active	250kbps	300 mV	2	16-SOIC	1306 Pcs
SP3232EBCN-L/TR	MaxLinear, Inc.	Active	250kbps	300 mV	2	16-SOIC	30300 Pcs
ST3232ECDR	STMicroelectronics	Active	250kbps	500 mV	3	16-SOIC	24020 Pcs

Engineering Selection Recommendations

Tier 1 - Direct Functional Equivalents (Recommended Primary Substitutes):

TRSF3232ECDR (Texas Instruments) and SP3232EUCN-L/TR (MaxLinear, Inc.) are the preferred substitutes. Both maintain the 1Mbps data rate and 300mV receiver hysteresis of the original TRSF3232CDG4. TRSF3232ECDR preserves the Texas Instruments manufacturer lineage with active product status and ROHS3 compliance. SP3232EUCN-L/TR offers the highest inventory availability (32900 units) with active status and ROHS3 compliance, though with MSL 2 rating versus the original MSL 1.

Tier 2 - Parametric Equivalents (Secondary Substitutes):

ICL3232ECBNZ-T (Renesas Electronics) and SP3232EBCN-L/TR (MaxLinear, Inc.) are functionally compatible alternatives with reduced data rate (250kbps) and higher receiver hysteresis (500mV for ICL3232ECBNZ-T). These parts maintain full RS232 protocol compliance and 16-SOIC package compatibility. ICL3232ECBNZ-T provides the highest inventory (17795 units) among parametric equivalents. SP3232EBCN-L/TR offers 30300 units with 300mV hysteresis, suitable for applications not requiring 1Mbps data rate capability.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. MSL ratings vary from 1 to 3; applications requiring unlimited moisture exposure should prioritize TRSF3232ECDR (MSL 1) or SP3232EUCN-L variants (MSL 2). Applications with controlled storage environments can utilize Renesas ICL3232 variants (MSL 3).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 250kbps data rate in place of the 1Mbps TRSF3232CDG4?

A: Yes, if your application operates at or below 250kbps. The 250kbps-rated parts (ICL3232 series, SP3232EBCN-L variants, ST3232ECDR) are functionally compatible with the 16-SOIC package and RS232 protocol requirements. Verify your actual data rate requirements before selection.

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

A: Receiver hysteresis determines the voltage differential required for the receiver to switch logic states. Both 300mV and 500mV hysteresis values meet RS232 specifications. Higher hysteresis (500mV) provides greater noise immunity in electrically noisy environments. Lower hysteresis (300mV) matches the original TRSF3232CDG4 specification.

Q: Are the different packaging options (Tube, Cut Tape, Tape & Reel) electrically equivalent?

A: Yes. Tube, Cut Tape (CT), and Tape & Reel (TR) packaging options contain electrically identical components. Packaging selection depends on assembly process requirements and volume needs. Tape & Reel packaging typically supports automated assembly; Tube packaging suits lower-volume manual assembly.

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

A: MSL indicates the maximum time a component can be exposed to moisture before soldering. MSL 1 (unlimited) requires no special handling. MSL 2 (1 Year) and MSL 3 (168 Hours) require controlled storage and handling procedures. Select MSL 1 or 2 for standard manufacturing environments; MSL 3 requires specialized moisture-controlled storage.

Q: Is the 16-SOIC package footprint identical across all substitute parts?

A: Yes. All listed substitute parts use the 16-SOIC package with 0.154" width and 3.90mm body width, ensuring PCB footprint compatibility. ST3232ECDR uses 16-SO designation (functionally equivalent to 16-SOIC) with identical physical dimensions.

Q: Which substitute offers the best inventory availability?

A: SP3232EUCN-L/TR (MaxLinear, Inc.) provides the highest inventory at 32900 units with 1Mbps data rate matching the original specification. SP3232EBCN-L/TR offers 30300 units at 250kbps. ICL3232ECBNZ-T provides 17795 units with 500mV hysteresis.

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