TRSF3232CDR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232CDR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 1Mbps data rate and 300mV receiver hysteresis. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3232CDR
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
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232CDR is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

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

Secondary Considerations:

Data rate (1Mbps preferred; 250kbps acceptable with functional verification)
Receiver hysteresis (300mV preferred; 500mV acceptable)
Moisture sensitivity level and packaging format
Product status (active preferred over obsolete)

Parts are grouped into two categories: parametric equivalents from Texas Instruments with identical electrical specifications, and direct substitutes from alternative manufacturers (Renesas Electronics, MaxLinear) that meet core functional requirements within allowed parameter tolerances.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	Product Status	MSL
TRSF3232CDR	Texas Instruments	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	1
SN75C3232DR	Texas Instruments	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	1
SN75C3232EDR	Texas Instruments	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete	1
TRSF3232ECDR	Texas Instruments	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	1
ICL3232CBNZ	Renesas Electronics	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	3
ICL3232CBNZ-T	Renesas Electronics	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	3
ICL3232ECBNZ	Renesas Electronics	250kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	3
ICL3232ECBNZ-T	Renesas Electronics	250kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	3
SP3232EBCN-L	MaxLinear, Inc.	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2
SP3232EBCN-L/TR	MaxLinear, Inc.	250kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2
SP3232EUCN-L	MaxLinear, Inc.	1Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active	2

Engineering Selection Recommendations

Tier 1 - Preferred Substitutes (Texas Instruments, Active Status):

SN75C3232DR and TRSF3232ECDR are the primary recommended substitutes. Both maintain identical electrical specifications to the TRSF3232CDR (1Mbps data rate, 300mV hysteresis, MSL 1) while offering active product status and assured long-term availability. SN75C3232DR is supplied in Tape & Reel packaging; TRSF3232ECDR is supplied in Cut Tape & Digi-Reel format. Selection between these two depends on procurement volume and packaging requirements.

Tier 2 - Alternative Substitutes (MaxLinear SP3232EUCN-L):

SP3232EUCN-L from MaxLinear maintains the 1Mbps data rate and 300mV hysteresis specifications while offering active product status. This part differs in MSL rating (2 vs. 1) and is supplied in Tube packaging. This option is suitable for applications where supply chain diversification is beneficial.

Tier 3 - Functional Substitutes (Renesas ICL3232 Series, Reduced Data Rate):

ICL3232CBNZ, ICL3232CBNZ-T, ICL3232ECBNZ, and ICL3232ECBNZ-T operate at 250kbps data rate, which is lower than the original 1Mbps specification. These parts are suitable only for applications where the reduced data rate does not impact system performance. The ICL3232ECBNZ variants feature 500mV receiver hysteresis compared to the 300mV specification. All Renesas parts carry MSL 3 rating and active product status.

Tier 4 - Secondary Alternatives (MaxLinear SP3232EBCN Series, Reduced Data Rate):

SP3232EBCN-L and SP3232EBCN-L/TR operate at 250kbps data rate. These parts maintain 300mV hysteresis and active product status with MSL 2 rating. Selection between Tube (SP3232EBCN-L) and Tape & Reel (SP3232EBCN-L/TR) packaging depends on procurement volume.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate (250kbps instead of 1Mbps)?

A: Substitution with lower data rate parts (Renesas ICL3232 series, MaxLinear SP3232EBCN series) is functionally possible only if your application operates at or below 250kbps. The original TRSF3232CDR specifies 1Mbps capability. Application-level verification is required to confirm that reduced data rate does not compromise system requirements.

Q: What is the difference between the packaging options (Tube, Tape & Reel, Cut Tape)?

A: Packaging format affects procurement and handling. Tube packaging is suitable for lower-volume orders and manual assembly. Tape & Reel (TR) packaging is optimized for high-volume automated assembly. Cut Tape (CT) & Digi-Reel format provides intermediate volume flexibility. All three formats contain identical die and electrical specifications; selection depends on production volume and assembly equipment.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original TRSF3232CDR specification.

Q: What does MSL (Moisture Sensitivity Level) mean for my procurement?

A: MSL indicates moisture sensitivity during storage and handling. The original TRSF3232CDR carries MSL 1 (unlimited shelf life). Tier 2 substitutes (MaxLinear SP3232EUCN-L) carry MSL 2 (1 year shelf life); Tier 3 and 4 substitutes (Renesas, MaxLinear EBCN series) carry MSL 2 or 3. Higher MSL ratings require controlled storage conditions and may impact procurement logistics.

Q: Which substitute offers the best long-term availability?

A: SN75C3232DR and TRSF3232ECDR from Texas Instruments offer the strongest availability outlook due to active product status and established supply chain presence. These parts are recommended for new designs requiring extended product lifecycle support.

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

A: All listed substitutes are pin-compatible and functionally equivalent within their specified parameter ranges. However, mixing parts from different manufacturers or with different data rate specifications in the same production run introduces supply chain complexity and potential performance variation. Standardization on a single substitute part number is recommended for manufacturing consistency.

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