TRS3232CDWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3232CDWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This interface IC operates across a 3V to 5.5V supply range with a 250kbps data rate and 300mV receiver hysteresis. The part is currently in Last Time Buy status, indicating end-of-life production. Equivalent and substitute parts are necessary to ensure design continuity and long-term component availability for new production runs and legacy system maintenance.

Key Parameters

Parameter	TRS3232CDWR Value
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Package / Case	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Data Rate	250kbps
Receiver Hysteresis	300mV
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRS3232CDWR is determined by the following critical parameters:

Core Compatibility Requirements:

Protocol: RS232
Drivers/Receivers: 2/2 configuration
Duplex: Full
Package / Case: 16-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Voltage - Supply: 3V ~ 5.5V
RoHS Status: ROHS3 Compliant

Allowable Variations:

Operating Temperature: May extend beyond 0°C ~ 70°C (upgrades acceptable)
Data Rate: May equal or exceed 250kbps
Receiver Hysteresis: May differ (300mV or 500mV acceptable)
Packaging Format: Tape & Reel (TR), Cut Tape (CT), or Tube acceptable
Product Status: Active parts preferred over Last Time Buy

Substitute parts are grouped into three categories: Parametric Equivalents (identical electrical specifications), Upgrades (enhanced temperature or performance ratings), and Manufacturer Recommended alternatives (functionally compatible with minor parameter variations).

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temperature	Voltage - Supply	Package	Product Status	MSL Rating
TRS3232CDWR	Texas Instruments	2/2	250kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Last Time Buy	1 (Unlimited)
MAX3232CDWR	Texas Instruments	2/2	250kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Last Time Buy	1 (Unlimited)
MAX3232ECDWR	Texas Instruments	2/2	250kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
TRS3232ECDWR	Texas Instruments	2/2	250kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
MAX3232EEWE+	Analog Devices Inc./Maxim Integrated	2/2	250kbps	500mV	-40°C ~ 85°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
MAX3232EEWE+T	Analog Devices Inc./Maxim Integrated	2/2	250kbps	500mV	-40°C ~ 85°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
ICL3232ECBZ	Renesas Electronics Corporation	2/2	250kbps	500mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	3 (168 Hours)
ICL3232ECBZ-T	Renesas Electronics Corporation	2/2	250kbps	500mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	3 (168 Hours)
MAX3232CWE+	Analog Devices Inc./Maxim Integrated	2/2	235Kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
MAX3232CWE+T	Analog Devices Inc./Maxim Integrated	2/2	235Kbps	300mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)
MAX3232ECWE+	Analog Devices Inc./Maxim Integrated	2/2	1Mbps	500mV	0°C ~ 70°C	3V ~ 5.5V	16-SOIC	Active	1 (Unlimited)

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement): MAX3232ECDWR and TRS3232ECDWR are direct parametric equivalents with identical electrical specifications to the TRS3232CDWR. Both are Active status parts, providing superior long-term availability compared to the Last Time Buy original. These parts maintain 300mV receiver hysteresis, 250kbps data rate, and 0°C to 70°C operating temperature range. TRS3232ECDWR maintains Texas Instruments sourcing; MAX3232ECDWR provides alternative supply from the same manufacturer family.

Upgrade Options (Enhanced Performance): MAX3232EEWE+ and MAX3232EEWE+T offer extended operating temperature range (-40°C to 85°C) and increased receiver hysteresis (500mV) while maintaining identical supply voltage and data rate specifications. These upgrades are suitable for applications requiring wider temperature operation or improved noise immunity. Both carry Active product status and unlimited MSL rating.

Manufacturer Recommended Alternatives: ICL3232ECBZ and ICL3232ECBZ-T (Renesas Electronics) provide functional compatibility with 500mV receiver hysteresis and Active product status. These parts carry MSL-3 rating (168 hours), requiring moisture control during storage and handling. MAX3232CWE+ and MAX3232CWE+T maintain 300mV hysteresis with slightly reduced data rate (235Kbps), acceptable for applications not requiring full 250kbps bandwidth. MAX3232ECWE+ offers the highest data rate (1Mbps) with 500mV hysteresis for performance-critical applications.

All substitute parts maintain ROHS3 compliance, 16-SOIC package compatibility, and 3V to 5.5V supply voltage range required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can MAX3232ECDWR directly replace TRS3232CDWR without circuit modification? A: Yes. MAX3232ECDWR is a parametric equivalent with identical electrical specifications, package, and pin configuration. No circuit modifications are required. Both parts operate at 3V to 5.5V supply, support 250kbps data rate, and feature 300mV receiver hysteresis in 16-SOIC packaging.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging? A: Tape & Reel and Cut Tape are packaging formats for surface mount components. Tape & Reel is supplied on continuous carrier tape suitable for automated pick-and-place assembly. Cut Tape is supplied in shorter tape segments. Both formats contain identical die and electrical specifications. Selection depends on assembly equipment compatibility and order quantity requirements.

Q: Are the Renesas ICL3232ECBZ parts suitable replacements? A: ICL3232ECBZ and ICL3232ECBZ-T are functionally compatible with 2/2 RS232 transceiver configuration and identical supply voltage range. The primary differences are 500mV receiver hysteresis (versus 300mV) and MSL-3 moisture sensitivity rating (versus MSL-1). These parts require moisture control during storage. They are suitable for applications where increased hysteresis improves noise immunity.

Q: What does MSL-1 (Unlimited) versus MSL-3 (168 Hours) mean for component handling? A: MSL rating indicates moisture sensitivity level. MSL-1 (Unlimited) parts have no time restrictions after moisture exposure and can be stored indefinitely under normal conditions. MSL-3 (168 Hours) parts must be used within 168 hours of moisture exposure or require baking to restore moisture absorption capacity. MSL-3 parts demand stricter moisture control during storage and assembly.

Q: Can MAX3232EEWE+ be used in applications requiring 0°C to 70°C operation? A: Yes. MAX3232EEWE+ operates across -40°C to 85°C, which encompasses the 0°C to 70°C range. The extended temperature capability does not restrict operation within narrower temperature bands. This part is suitable for applications with standard temperature requirements and provides additional margin for thermal extremes.

Q: Why does MAX3232CWE+ show 235Kbps data rate instead of 250kbps? A: MAX3232CWE+ and MAX3232CWE+T are rated for 235Kbps maximum data rate. This specification remains within acceptable tolerance for RS232 applications operating at standard baud rates (9600, 19200, 38400, 115200). These parts are suitable for applications not requiring the full 250kbps bandwidth.

Q: Is MAX3232ECWE+ with 1Mbps data rate a direct substitute? A: MAX3232ECWE+ is functionally compatible as a 2/2 RS232 transceiver in 16-SOIC packaging with identical supply voltage. The 1Mbps data rate exceeds the original 250kbps specification, providing performance headroom. The 500mV receiver hysteresis differs from the original 300mV. This part is suitable for applications requiring higher data rates or improved noise immunity.

Q: What is the significance of "Last Time Buy" status for TRS3232CDWR? A: Last Time Buy status indicates the manufacturer has ceased production and will not accept new orders after a specified date. Existing inventory may be available but will eventually deplete. Selecting Active status alternatives (MAX3232ECDWR, TRS3232ECDWR, or other recommended parts) ensures long-term availability for future production runs and design revisions.

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