TRS3232IDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3232IDB is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SSOP package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The TRS3232IDB operates across a 3V to 5.5V supply range with a 250 kbps data rate and -40°C to 85°C temperature range, serving as a standard interface component for RS232 serial communication applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3232IDB
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the TRS3232IDB is determined by the following critical parameters:

Core Functional Requirements:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 3V ~ 5.5V
Mounting Type: Surface Mount

Package Compatibility:

Primary: 16-SSOP (0.209", 5.30mm Width) — direct mechanical and electrical compatibility
Secondary: 16-TSSOP (0.173", 4.40mm Width) — compatible pinout with reduced footprint

Performance Parameters:

Data Rate: 250 kbps (minimum requirement)
Operating Temperature: -40°C ~ 85°C (extended industrial range)
Receiver Hysteresis: 300 mV (standard specification)

Substitute parts are grouped into three categories:

Direct Equivalents — Identical package (16-SSOP), matching all electrical parameters, active product status
Parametric Equivalents — Identical package (16-SSOP), matching electrical parameters, may have different product status
Manufacturer-Recommended Alternatives — Different package (16-TSSOP) or enhanced specifications, active product status with higher data rates or hysteresis values

Parameter Comparison

Part Number	Manufacturer	Package	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Supply Voltage	Product Status	MSL
TRS3232IDB	Texas Instruments	16-SSOP	2/2	250 kbps	300 mV	-40°C ~ 85°C	3V ~ 5.5V	Obsolete	1
TRS3232EIDBR	Texas Instruments	16-SSOP	2/2	250 kbps	300 mV	-40°C ~ 85°C	3V ~ 5.5V	Active	1
MAX3232EIDB	Texas Instruments	16-SSOP	2/2	250 kbps	300 mV	-40°C ~ 85°C	3V ~ 5.5V	Obsolete	1
ADM3232EARUZ	Analog Devices Inc.	16-TSSOP	2/2	460 kbps	500 mV	-40°C ~ 85°C	3V ~ 5.5V	Active	1
ADM3232EARUZ-REEL7	Analog Devices Inc.	16-TSSOP	2/2	460 kbps	500 mV	-40°C ~ 85°C	3V ~ 5.5V	Active	1
ICL3232CVZ	Renesas Electronics Corporation	16-TSSOP	2/2	250 kbps	300 mV	0°C ~ 70°C	3V ~ 5.5V	Active	3
ICL3232CVZ-T	Renesas Electronics Corporation	16-TSSOP	2/2	250 kbps	300 mV	0°C ~ 70°C	3V ~ 5.5V	Active	3
ICL3232ECAZ	Renesas Electronics Corporation	16-SSOP	2/2	250 kbps	500 mV	0°C ~ 70°C	3V ~ 5.5V	Active	3
ICL3232ECAZ-T	Renesas Electronics Corporation	16-SSOP	2/2	250 kbps	500 mV	0°C ~ 70°C	3V ~ 5.5V	Active	3
ICL3232ECV-16Z	Renesas Electronics Corporation	16-TSSOP	2/2	250 kbps	500 mV	0°C ~ 70°C	3V ~ 5.5V	Active	3
ICL3232EIAZ	Renesas Electronics Corporation	16-SSOP	2/2	250 kbps	500 mV	-40°C ~ 85°C	3V ~ 5.5V	Active	3

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Specifications):

TRS3232EIDBR is the primary direct substitute. It maintains the 16-SSOP package, identical electrical specifications (250 kbps, 300 mV hysteresis, -40°C to 85°C), and carries active product status from Texas Instruments. This part is available in high volume (665,800 units) and is suitable for applications requiring no design modification.

For Extended Temperature Range with Same Package:

ICL3232EIAZ (Renesas Electronics Corporation) provides the 16-SSOP package with extended temperature range (-40°C to 85°C) and active product status. The receiver hysteresis is specified at 500 mV instead of 300 mV. This part is suitable for designs where the higher hysteresis value does not impact system performance.

For Reduced Footprint with Enhanced Performance:

ADM3232EARUZ and ADM3232EARUZ-REEL7 (Analog Devices Inc.) offer the 16-TSSOP package with higher data rate (460 kbps) and 500 mV receiver hysteresis. These parts are active and suitable for space-constrained designs where the smaller footprint and enhanced specifications are beneficial. The packaging variants differ only in tape and reel configuration.

For Industrial Temperature Range with Compact Package:

ICL3232CVZ and ICL3232CVZ-T (Renesas Electronics Corporation) provide the 16-TSSOP package with matching data rate and hysteresis. Operating temperature is limited to 0°C to 70°C, making these parts suitable for commercial and industrial environments where extended low-temperature operation is not required.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original TRS3232IDB specifications.

Frequently Asked Questions (FAQ)

Q: Can I use TRS3232EIDBR as a direct replacement for TRS3232IDB without PCB modification?

A: Yes. TRS3232EIDBR is a direct equivalent with identical 16-SSOP package, pinout, and electrical specifications. No PCB layout changes are required. The primary difference is product status (active vs. obsolete) and packaging format (Cut Tape & Digi-Reel vs. standard).

Q: What is the difference between 16-SSOP and 16-TSSOP packages?

A: Both are 16-pin surface mount packages with identical pinout. The 16-TSSOP has a narrower body width (0.173" vs. 0.209"), resulting in a smaller footprint. Electrical performance is equivalent. PCB layout must accommodate the different package dimensions.

Q: Can I substitute ICL3232EIAZ for TRS3232IDB in my design?

A: Yes, with one consideration. ICL3232EIAZ uses the same 16-SSOP package and supports the same temperature range (-40°C to 85°C). The receiver hysteresis is 500 mV instead of 300 mV. If your design does not depend on the lower hysteresis value, this part is functionally compatible.

Q: Why do some substitutes have different operating temperature ranges?

A: Operating temperature range is a design specification set by each manufacturer. ICL3232 variants from Renesas are available in both commercial (0°C to 70°C) and industrial (-40°C to 85°C) grades. Select the temperature range matching your application requirements.

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. TRS3232IDB and Texas Instruments substitutes have MSL 1 (unlimited storage). Renesas ICL3232 variants have MSL 3 (168 hours maximum). For high-volume production with extended storage, MSL 1 parts are preferred.

Q: Are ADM3232EARUZ and ADM3232EARUZ-REEL7 functionally identical?

A: Yes. Both are identical Analog Devices parts with the same electrical specifications and 16-TSSOP package. The difference is packaging format: ADM3232EARUZ is supplied in tubes, while ADM3232EARUZ-REEL7 is supplied on cut tape and digi-reel. Select based on your procurement and assembly process requirements.

Q: Can I use a 460 kbps part (ADM3232EARUZ) in a design specified for 250 kbps?

A: Yes. Higher data rate capability is backward compatible with lower-speed applications. The ADM3232EARUZ will operate correctly at 250 kbps or lower. This substitution introduces no functional risk for speed-limited designs.

Q: What compliance certifications apply to all substitute parts?

A: All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the original TRS3232IDB specifications. All parts carry EAR99 export classification and HTSUS code 8542.39.0001.

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