TRS3232CDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3232CDB is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SSOP package. This component is classified as obsolete, which necessitates identification of functionally equivalent active alternatives for new designs and ongoing production requirements. The TRS3232CDB operates across a 3V to 5.5V supply range with a 250kbps data rate and 300mV receiver hysteresis, making it suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	TRS3232CDB Value
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Package / Case	16-SSOP (0.209", 5.30mm Width)
Data Rate	250kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	300mV
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TRS3232CDB is determined by strict equivalence across the following critical parameters:

RS232 protocol compliance with 2/2 driver/receiver configuration
Full-duplex operation capability
Supply voltage range of 3V to 5.5V
250kbps data rate support
Surface mount package compatibility (16-SSOP or 16-TSSOP)
ROHS3 compliance and EAR99 classification

Substitute parts are grouped into two categories based on package type: 16-SSOP direct replacements and 16-TSSOP alternatives. The 16-TSSOP variants offer identical electrical performance with a narrower package footprint (0.173" vs 0.209" width). All substitute parts listed maintain active product status, ensuring long-term availability and supply chain reliability.

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Receiver Hysteresis	Operating Temp	Product Status	Inventory
TRS3232CDB	Texas Instruments	16-SSOP	250kbps	300mV	0°C ~ 70°C	Obsolete	772 Pcs
MAX3232EEAE+	Analog Devices Inc./Maxim Integrated	16-SSOP	250kbps	500mV	-40°C ~ 85°C	Active	2000 Pcs
MAX3232EEAE+T	Analog Devices Inc./Maxim Integrated	16-SSOP	250kbps	500mV	-40°C ~ 85°C	Active	17900 Pcs
SP3232EBEA-L/TR	MaxLinear, Inc.	16-SSOP	250kbps	300mV	-40°C ~ 85°C	Active	29349 Pcs
ADM3232EARUZ	Analog Devices Inc.	16-TSSOP	460Kbps	500mV	-40°C ~ 85°C	Active	1340 Pcs
ADM3232EARUZ-REEL7	Analog Devices Inc.	16-TSSOP	460Kbps	500mV	-40°C ~ 85°C	Active	30400 Pcs
ICL3232CVZ	Renesas Electronics Corporation	16-TSSOP	250kbps	300mV	0°C ~ 70°C	Active	1811 Pcs
ICL3232CVZ-T	Renesas Electronics Corporation	16-TSSOP	250kbps	300mV	0°C ~ 70°C	Active	1424 Pcs
ICL3232ECAZ	Renesas Electronics Corporation	16-SSOP	250kbps	500mV	0°C ~ 70°C	Active	1270 Pcs
ICL3232ECAZ-T	Renesas Electronics Corporation	16-SSOP	250kbps	500mV	0°C ~ 70°C	Active	30400 Pcs
ICL3232ECV-16Z	Renesas Electronics Corporation	16-TSSOP	250kbps	500mV	0°C ~ 70°C	Active	1992 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and EAR99 classification, ensuring regulatory alignment with the original TRS3232CDB. Selection between alternatives depends on specific application requirements:

For 16-SSOP package continuity with identical receiver hysteresis (300mV), the SP3232EBEA-L/TR from MaxLinear offers the highest inventory availability (29349 units) and extended operating temperature range (-40°C to 85°C) compared to the original specification (0°C to 70°C).

For applications requiring extended temperature performance with 16-SSOP packaging, the MAX3232EEAE+T variant provides 17900 units in stock with -40°C to 85°C operating range, though receiver hysteresis increases to 500mV.

For space-constrained designs, 16-TSSOP alternatives including ADM3232EARUZ-REEL7 and ICL3232CVZ-T provide narrower package footprints. The ADM3232EARUZ-REEL7 offers the highest data rate capability (460Kbps) with 30400 units available, while ICL3232CVZ-T maintains the original 250kbps specification with 1424 units in stock.

Frequently Asked Questions (FAQ)

Q: Can I use a 16-TSSOP package substitute in place of the 16-SSOP TRS3232CDB?

A: 16-TSSOP and 16-SSOP packages have different footprints and pinouts. The 16-TSSOP is narrower (0.173" vs 0.209" width) and requires PCB layout redesign. Direct mechanical substitution is not possible without board rework.

Q: What is the significance of receiver hysteresis differences between 300mV and 500mV?

A: Receiver hysteresis determines the voltage differential required for input signal transitions. The 300mV specification of the TRS3232CDB and SP3232EBEA-L/TR provides tighter input thresholds, while 500mV variants (MAX3232, ADM3232, ICL3232E-series) offer greater noise immunity. Selection depends on signal integrity requirements in your application environment.

Q: Why do some substitutes have higher data rates (460Kbps vs 250Kbps)?

A: The ADM3232EARUZ and ADM3232EARUZ-REEL7 support 460Kbps operation, exceeding the TRS3232CDB specification of 250Kbps. These parts are backward compatible and operate correctly at 250Kbps, providing performance headroom for future design iterations.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification. The SP3232EBEA-L/TR carries RoHS Compliant status. Verify specific compliance documentation with your supplier for regulatory documentation requirements.

Q: What is the difference between tube and tape & reel packaging options?

A: Tube packaging is suitable for lower-volume applications and manual assembly. Tape & Reel (TR) and Cut Tape (CT) with Digi-Reel packaging are designed for automated pick-and-place assembly. Selection depends on your production volume and assembly process capabilities.

Q: Can I substitute parts with different operating temperature ranges?

A: Operating temperature range substitution is application-dependent. If your design operates within 0°C to 70°C, parts rated for -40°C to 85°C are compatible. Conversely, parts rated only to 70°C maximum cannot be used in applications requiring -40°C operation.

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