TRSF3232ECDBRG4 RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232ECDBRG4 is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 2 drivers and 2 receivers in a 16-SSOP surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and operational parameters to ensure direct replacement capability.

Key Parameters

Parameter	TRSF3232ECDBRG4
Manufacturer	Texas Instruments
Protocol	RS232
Type	Transceiver
Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1 Mbps
Supply Voltage	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	16-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across the following critical criteria:

Primary Compatibility Parameters:

Protocol: RS232
Configuration: 2 Drivers / 2 Receivers, Full Duplex
Supply Voltage Range: 3V ~ 5.5V
Package Type: 16-SSOP or 16-TSSOP (both 16-pin surface mount variants)
Mounting: Surface Mount
RoHS Compliance: ROHS3 Compliant

Secondary Compatibility Parameters:

Receiver Hysteresis: 300 mV (primary specification) or 500 mV (acceptable variance)
Data Rate: 1 Mbps (primary) or 250 kbps (acceptable for RS232 applications)
Operating Temperature: 0°C ~ 70°C (commercial) or -40°C ~ 85°C (industrial, backward compatible)

Substitute parts are grouped by manufacturer and product status. Texas Instruments alternatives maintain identical electrical specifications. Renesas Electronics Corporation alternatives provide functional equivalence with minor parameter variations acceptable within RS232 transceiver application tolerances.

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	Inventory
TRSF3232ECDBRG4	Texas Instruments	2/2	300 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Discontinued	873 Pcs
TRSF3232ECDBR	Texas Instruments	2/2	300 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	1150 Pcs
SN75C3232EDBR	Texas Instruments	2/2	300 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	2000 Pcs
ICL3232CVZ	Renesas Electronics	2/2	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	1811 Pcs
ICL3232CVZ-T	Renesas Electronics	2/2	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	1424 Pcs
ICL3232ECAZ	Renesas Electronics	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	1270 Pcs
ICL3232ECAZ-T	Renesas Electronics	2/2	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	30400 Pcs
ICL3232EIAZ	Renesas Electronics	2/2	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	23920 Pcs
ICL3232EIAZ-T	Renesas Electronics	2/2	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	30100 Pcs
ICL3232EIV-16Z	Renesas Electronics	2/2	500 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active	1699 Pcs
ICL3232IVZ	Renesas Electronics	2/2	300 mV	250 kbps	3V ~ 5.5V	-40°C ~ 85°C	16-TSSOP	Active	4207 Pcs

Engineering Selection Recommendations

Texas Instruments Direct Substitutes (Identical Specifications): TRSF3232ECDBR and SN75C3232EDBR maintain complete electrical and mechanical compatibility with the TRSF3232ECDBRG4. Both parts are ROHS3 compliant and operate within identical parameter ranges. Product status is obsolete for both alternatives, indicating limited long-term availability.

Renesas Electronics Active Alternatives: The ICL3232 series provides functional equivalence with active product status, ensuring sustained availability. Parts with 300 mV receiver hysteresis (ICL3232CVZ, ICL3232CVZ-T, ICL3232IVZ) match the primary specification of the original part. Parts with 500 mV receiver hysteresis (ICL3232ECAZ, ICL3232ECAZ-T, ICL3232EIAZ, ICL3232EIAZ-T, ICL3232EIV-16Z) operate within acceptable RS232 transceiver tolerances.

Temperature Range Considerations: Industrial-grade variants (ICL3232EIAZ, ICL3232EIAZ-T, ICL3232EIV-16Z, ICL3232IVZ) support -40°C ~ 85°C operation, providing extended temperature capability beyond the original commercial specification of 0°C ~ 70°C.

Package Variants: 16-SSOP packages (ICL3232ECAZ, ICL3232ECAZ-T, ICL3232EIAZ, ICL3232EIAZ-T) provide direct mechanical compatibility. 16-TSSOP packages (ICL3232CVZ, ICL3232CVZ-T, ICL3232EIV-16Z, ICL3232IVZ) require PCB layout verification due to different pin pitch (0.173" vs 0.209"), though both are surface mount configurations.

Inventory and Availability: Renesas ICL3232ECAZ-T and ICL3232EIAZ-T variants offer highest inventory levels (30,400 and 30,100 units respectively), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can ICL3232 parts with 250 kbps data rate replace the TRSF3232ECDBRG4 rated at 1 Mbps? A: Yes. RS232 transceiver applications typically operate at standard baud rates (9600, 19200, 115200 bps), all well below 250 kbps. The 250 kbps rating is sufficient for standard RS232 communication protocols.

Q: What is the difference between 16-SSOP and 16-TSSOP packages? A: Both are 16-pin surface mount packages. 16-SSOP has 0.209" width with 0.050" pin pitch. 16-TSSOP has 0.173" width with 0.026" pin pitch. PCB footprints are not interchangeable; layout redesign is required for TSSOP variants.

Q: Are 300 mV and 500 mV receiver hysteresis values interchangeable? A: Both values are acceptable for RS232 applications. 300 mV provides tighter noise margins; 500 mV provides greater noise immunity. Selection depends on signal integrity requirements in the specific application.

Q: Why do some ICL3232 variants have -40°C ~ 85°C ratings while others are 0°C ~ 70°C? A: Temperature rating designations indicate industrial-grade (I-suffix) versus commercial-grade (C-suffix) qualification. Industrial variants support extended temperature ranges and are suitable for harsh environments.

Q: Is MSL (Moisture Sensitivity Level) rating important for substitution? A: Yes. The original TRSF3232ECDBRG4 has MSL 1 (unlimited shelf life). Renesas ICL3232 variants have MSL 3 (168-hour limit). Storage and handling procedures must account for the more stringent moisture sensitivity requirement.

Q: Can I use ICL3232IVZ in place of TRSF3232ECDBRG4? A: ICL3232IVZ is functionally equivalent with matching 300 mV hysteresis and 3V ~ 5.5V supply range. However, it uses 16-TSSOP packaging (different footprint) and has MSL 3 rating. PCB redesign and moisture control procedures are required.

Q: Which substitute offers the best long-term availability? A: ICL3232ECAZ-T and ICL3232EIAZ-T (Renesas, Tape & Reel packaging) have the highest inventory levels and active product status, providing optimal supply chain continuity.

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