TRSF3232ECDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232ECDB is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 2 drivers and 2 receivers in a 16-SSOP package. This device operates across a 3V to 5.5V supply range with a 1 Mbps data rate and 300 mV receiver hysteresis. The part is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and procurement planning.

Key Parameters

Parameter	TRSF3232ECDB
Manufacturer	Texas Instruments
Protocol	RS232
Type	Transceiver
Drivers/Receivers	2/2
Duplex	Full
Data Rate	1 Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	16-SSOP (0.209", 5.30mm Width)
Receiver Hysteresis	300 mV
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232ECDB is determined by the following critical parameters:

Protocol: RS232 (mandatory match)
Configuration: 2 drivers / 2 receivers, full-duplex (mandatory match)
Package Type: 16-SSOP or 16-TSSOP (both acceptable for pin-compatible substitution)
Voltage Supply Range: 3V ~ 5.5V (mandatory overlap)
Data Rate: Minimum 1 Mbps (equal or higher acceptable)
Receiver Hysteresis: 300 mV or 500 mV (both acceptable for RS232 applications)
Operating Temperature: 0°C ~ 70°C minimum (extended range acceptable)
RoHS Compliance: ROHS3 or equivalent (mandatory for regulatory alignment)

Substitute parts are grouped into two categories: direct equivalents (16-SSOP package matching) and compatible alternatives (16-TSSOP package with pin compatibility).

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Packaging Type
TRSF3232ECDB	Texas Instruments	16-SSOP	1 Mbps	300 mV	0°C ~ 70°C	Last Time Buy	Tube
SP3232EUEA-L/TR	MaxLinear, Inc.	16-SSOP	1 Mbps	300 mV	-40°C ~ 85°C	Active	Tape & Reel
ICL3232CVZ	Renesas Electronics	16-TSSOP	250 kbps	300 mV	0°C ~ 70°C	Active	Tube
ICL3232CVZ-T	Renesas Electronics	16-TSSOP	250 kbps	300 mV	0°C ~ 70°C	Active	Cut Tape & Digi-Reel
ICL3232ECAZ	Renesas Electronics	16-SSOP	250 kbps	500 mV	0°C ~ 70°C	Active	Tube
ICL3232ECAZ-T	Renesas Electronics	16-SSOP	250 kbps	500 mV	0°C ~ 70°C	Active	Tape & Reel
ICL3232ECV-16Z	Renesas Electronics	16-TSSOP	250 kbps	500 mV	0°C ~ 70°C	Active	Tube
ICL3232EIAZ	Renesas Electronics	16-SSOP	250 kbps	500 mV	-40°C ~ 85°C	Active	Tube
ICL3232EIAZ-T	Renesas Electronics	16-SSOP	250 kbps	500 mV	-40°C ~ 85°C	Active	Cut Tape & Digi-Reel
ICL3232EIV-16Z	Renesas Electronics	16-TSSOP	250 kbps	500 mV	-40°C ~ 85°C	Active	Tube
ICL3232IVZ	Renesas Electronics	16-TSSOP	250 kbps	300 mV	-40°C ~ 85°C	Active	Tube

Engineering Selection Recommendations

Direct Equivalent (16-SSOP Package): SP3232EUEA-L/TR from MaxLinear is the primary direct substitute. It maintains the 16-SSOP package footprint, 1 Mbps data rate, and 300 mV receiver hysteresis. The extended operating temperature range (-40°C to 85°C) provides additional thermal margin. Active product status ensures long-term availability and supply chain stability.

Compatible Alternatives (16-TSSOP Package): Renesas ICL3232 series parts in 16-TSSOP package are pin-compatible substitutes. All variants maintain the 2/2 transceiver configuration and RS232 protocol. Data rate is reduced to 250 kbps, which remains within RS232 standard specifications. Temperature-extended variants (ICL3232EIAZ-T, ICL3232EIV-16Z) support -40°C to 85°C operation. All Renesas parts carry Active product status with ROHS3 compliance.

16-SSOP Package Alternatives: ICL3232ECAZ and ICL3232ECAZ-T maintain the original 16-SSOP footprint with 500 mV receiver hysteresis. ICL3232EIAZ and ICL3232EIAZ-T extend the operating temperature to -40°C to 85°C while preserving the 16-SSOP package. These parts are suitable for designs requiring the original package geometry.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 16-TSSOP package part as a direct replacement for the 16-SSOP TRSF3232ECDB?

A: 16-TSSOP and 16-SSOP packages have different physical dimensions and pin spacing. 16-TSSOP (0.173", 4.40mm width) is narrower than 16-SSOP (0.209", 5.30mm width). PCB footprints are not interchangeable without layout redesign. However, both packages are pin-compatible for schematic functionality, requiring only footprint modification.

Q: Does the reduced data rate of ICL3232 parts (250 kbps vs. 1 Mbps) affect compatibility?

A: RS232 protocol operation is independent of maximum data rate specification. The 250 kbps rating indicates the part's maximum guaranteed performance. Applications operating below 250 kbps are fully compatible. Applications requiring 1 Mbps operation must use SP3232EUEA-L/TR or maintain the original TRSF3232ECDB.

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

A: Receiver hysteresis defines the voltage differential between logic state transitions. Both 300 mV and 500 mV are within RS232 standard specifications. Higher hysteresis (500 mV) provides improved noise immunity in electrically noisy environments. Lower hysteresis (300 mV) matches the original part specification.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry ROHS3 compliance status, matching the original TRSF3232ECDB. Compliance certifications are equivalent across all options.

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

A: All substitute parts carry Active product status, indicating ongoing manufacturing and distribution. SP3232EUEA-L/TR and ICL3232EIAZ-T show the highest inventory levels (2300 and 30100 units respectively), supporting sustained procurement.

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