TRSF3232ECDBR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232ECDBR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in 16-SSOP surface mount packaging. This component is classified as obsolete, indicating discontinued production and limited availability. The part operates across a 3V to 5.5V supply range with a 1 Mbps data rate and 300 mV receiver hysteresis, designed for legacy RS232 serial communication applications. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing system support, redesigns, and new production builds.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3232ECDBR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	16-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TRSF3232ECDBR is determined by the following critical parameters:

Functional Equivalence: Protocol (RS232), number of drivers/receivers (2/2), duplex mode (Full), and supply voltage range (3V ~ 5.5V) must remain constant.

Electrical Compatibility: Receiver hysteresis and data rate are secondary parameters. Parts with 250 kbps data rate remain compatible with 1 Mbps applications due to backward compatibility. Receiver hysteresis variations (300 mV vs. 500 mV) do not prevent substitution but affect noise immunity characteristics.

Package Compatibility: The 16-SSOP package is the primary form factor. Substitutes in 16-SOIC and 16-TSSOP packages are functionally equivalent but require PCB layout modifications.

Operating Temperature Range: The original part operates 0°C ~ 70°C. Substitutes with extended ranges (-40°C ~ 85°C) provide enhanced environmental capability and are acceptable upgrades.

Product Status & Availability: Active status parts are preferred for new designs and ongoing production. Obsolete parts should be phased out in favor of active alternatives.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Data Rate	Receiver Hysteresis	Supply Voltage	Operating Temp	Package	Product Status	Inventory (Pcs)
TRSF3232ECDBR	Texas Instruments	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	1150
TRSF3232EIDR	Texas Instruments	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active	3493
SN75C3232EDBR	Texas Instruments	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Obsolete	2000
SP3232EUEA-L/TR	MaxLinear, Inc.	RS232	2/2	1 Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	2300
ICL3232CVZ	Renesas Electronics	RS232	2/2	250 kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	1811
ICL3232CVZ-T	Renesas Electronics	RS232	2/2	250 kbps	300 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	1424
ICL3232ECAZ	Renesas Electronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	1270
ICL3232ECAZ-T	Renesas Electronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	30400
ICL3232ECV-16Z	Renesas Electronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	0°C ~ 70°C	16-TSSOP	Active	1992
ICL3232EIAZ	Renesas Electronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	23920
ICL3232EIAZ-T	Renesas Electronics	RS232	2/2	250 kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	16-SSOP	Active	30100

Engineering Selection Recommendations

Direct Package Replacement (16-SSOP): For applications requiring identical PCB footprint compatibility, SP3232EUEA-L/TR is the primary active substitute. It maintains the 16-SSOP package, 1 Mbps data rate, and 300 mV hysteresis while offering extended operating temperature range (-40°C ~ 85°C) and active product status. This part is manufactured by MaxLinear, Inc., and carries RoHS compliance certification.

Texas Instruments Ecosystem: TRSF3232EIDR provides a direct functional equivalent from the original manufacturer with active status. The trade-off is package change from 16-SSOP to 16-SOIC, requiring PCB redesign. This part maintains 1 Mbps data rate and 300 mV hysteresis with extended temperature range.

Renesas Electronics Alternatives: The ICL3232 series offers multiple configurations with active product status and high inventory availability. ICL3232EIAZ-T is recommended for applications requiring extended temperature operation (-40°C ~ 85°C) in 16-SSOP packaging. Note that Renesas parts operate at 250 kbps data rate, which is functionally compatible with legacy 1 Mbps applications due to backward compatibility in RS232 protocol implementation.

Parametric Equivalent: SN75C3232EDBR maintains identical electrical specifications and 16-SSOP packaging but remains obsolete. This part should not be selected for new designs.

Compliance & Certifications: All recommended substitutes maintain ROHS3 compliance and EAR99 export classification, consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use ICL3232 parts with 250 kbps data rate in place of the 1 Mbps TRSF3232ECDBR?

A: Yes. RS232 transceiver data rate specifications indicate maximum throughput capability. A 250 kbps part operates correctly in applications requiring lower data rates and is backward compatible with 1 Mbps system designs that do not saturate the communication channel.

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

A: Receiver hysteresis defines the voltage differential required to switch logic states. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments. Lower hysteresis (300 mV) allows faster signal transitions. Both values are compatible with standard RS232 signal levels and do not prevent substitution.

Q: Do I need to modify my PCB layout to use TRSF3232EIDR instead of TRSF3232ECDBR?

A: Yes. TRSF3232EIDR uses 16-SOIC packaging while the original part uses 16-SSOP. These packages have different pin pitch and footprint dimensions, requiring PCB layout modification. SP3232EUEA-L/TR maintains the 16-SSOP footprint and eliminates this requirement.

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

A: ICL3232EIAZ-T and ICL3232ECAZ-T from Renesas Electronics show the highest inventory levels (30,100 and 30,400 units respectively) and active product status, indicating sustained manufacturing support.

Q: Are all substitutes RoHS compliant?

A: Yes. All recommended substitutes carry ROHS3 compliance certification, consistent with the original TRSF3232ECDBR.

Q: Can I use parts with extended temperature range (-40°C ~ 85°C) in applications rated for 0°C ~ 70°C?

A: Yes. Extended temperature range parts are compatible with narrower temperature specifications. They provide additional environmental margin and are acceptable upgrades for existing designs.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is supplied on continuous reels for automated assembly lines. Cut Tape & Digi-Reel packaging is pre-cut into smaller quantities for manual assembly or lower-volume production. Both contain identical components; packaging format affects procurement and assembly processes only.

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