TRS232ECDR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS232ECDR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The TRS232ECDR operates within a 4.5V to 5.5V supply voltage range with a 250kbps data rate and 500mV receiver hysteresis, serving as a standard interface transceiver for RS232 serial communication applications.

Key Parameters

Parameter	TRS232ECDR Specification
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	250kbps
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TRS232ECDR is determined by strict equivalence across the following critical parameters:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Voltage Supply Range: 4.5V ~ 5.5V
Mounting Type: Surface Mount
Package / Case: 16-SOIC (0.154", 3.90mm Width)
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on operational temperature range and product status:

Category 1: Parametric Equivalents (Identical Operating Temperature) Parts that match all critical parameters including the 0°C ~ 70°C operating temperature range.

Category 2: Extended Temperature Range Alternatives (Broader Operating Temperature) Parts that meet all critical parameters but offer extended operating temperature ranges (-40°C ~ 85°C), providing additional design flexibility for applications requiring wider temperature operation.

Category 3: Functional Equivalents (Minor Parameter Variations) Parts that maintain RS232 2/2 full-duplex transceiver functionality with compatible supply voltage and packaging but may have variations in receiver hysteresis or data rate specifications within acceptable operating margins.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temperature	Package	Product Status
TRS232ECDR	Texas Instruments	RS232	2/2	Full	500 mV	250kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Obsolete
MAX232EIDR	Texas Instruments	RS232	2/2	Full	500 mV	250kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active
MAX232ECDR	Texas Instruments	RS232	2/2	Full	500 mV	250kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active
LT1781CS#PBF	Analog Devices Inc.	RS232	2/2	Full	400 mV	250KBd	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active
LT1781CS#TRPBF	Analog Devices Inc.	RS232	2/2	Full	400 mV	250KBd	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active
MAX232ECSE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	120Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active
MAX232ECSE+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	500 mV	120Kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active
ADM232AARNZ	UMW	RS232	2/2	Full	Not specified	120Kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active
ADM232AARNZ-REEL	Analog Devices Inc.	RS232	2/2	Full	400 mV	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active
ADM232AARNZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	400 mV	200kbps	4.5V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Active
HIN232ACBNZ	Renesas Electronics Corporation	RS232	2/2	Full	500 mV	230kbps	4.5V ~ 5.5V	0°C ~ 70°C	16-SOIC	Active

Engineering Selection Recommendations

Primary Recommendation: MAX232ECDR The MAX232ECDR is the optimal direct replacement for the obsolete TRS232ECDR. It maintains identical electrical specifications including 500mV receiver hysteresis, 250kbps data rate, and 0°C to 70°C operating temperature range. Both components are ROHS3 compliant with MSL 1 rating. The MAX232ECDR is in active production status with 15,483 units in stock, ensuring supply continuity.

Extended Temperature Alternative: MAX232EIDR For applications requiring extended operating temperature coverage, the MAX232EIDR provides identical electrical performance with an expanded -40°C to 85°C operating range. This part is manufactured by Texas Instruments and maintains all other critical specifications. It is actively produced with 54,300 units available.

Functional Alternatives with Active Status: The LT1781CS#PBF, LT1781CS#TRPBF, MAX232ECSE+, MAX232ECSE+T, ADM232AARNZ-REEL, ADM232AARNZ-REEL7, and HIN232ACBNZ are functionally compatible alternatives. These parts maintain RS232 2/2 full-duplex transceiver operation with 4.5V to 5.5V supply voltage and 16-SOIC packaging. Minor variations in receiver hysteresis (400mV vs 500mV) and data rate specifications (120kbps to 250kbps) remain within acceptable operating margins for standard RS232 serial communication applications. All listed alternatives are ROHS3 compliant and actively produced.

Frequently Asked Questions (FAQ)

Q: Can MAX232ECDR directly replace TRS232ECDR without circuit modifications? A: Yes. The MAX232ECDR is a parametric equivalent with identical electrical specifications, supply voltage range, operating temperature, and 16-SOIC package. No circuit modifications are required.

Q: What is the difference between MAX232EIDR and MAX232ECDR? A: Both parts are electrically identical with 500mV receiver hysteresis and 250kbps data rate. The primary difference is operating temperature range: MAX232EIDR operates from -40°C to 85°C, while MAX232ECDR operates from 0°C to 70°C. Select MAX232EIDR for applications requiring extended temperature operation.

Q: Are LT1781CS variants suitable replacements? A: Yes. The LT1781CS#PBF and LT1781CS#TRPBF maintain RS232 2/2 full-duplex operation with identical supply voltage and package specifications. The 400mV receiver hysteresis is lower than the original 500mV but remains within acceptable RS232 interface margins. Data rate is equivalent at 250kbps.

Q: What is the difference between MAX232ECSE+ and MAX232ECSE+T? A: Both parts are electrically identical RS232 2/2 transceivers with 500mV receiver hysteresis and 4.5V to 5.5V supply voltage. The difference is packaging: MAX232ECSE+ is supplied in Tube, while MAX232ECSE+T is supplied in Cut Tape (CT) & Digi-Reel. Data rate for both is 120kbps, which is lower than the original TRS232ECDR at 250kbps but suitable for standard RS232 applications.

Q: Can I use ADM232AARNZ-REEL for applications requiring 250kbps data rate? A: The ADM232AARNZ-REEL operates at 200kbps, which is lower than the original 250kbps specification. For applications strictly requiring 250kbps operation, select MAX232ECDR, MAX232EIDR, LT1781CS variants, or HIN232ACBNZ instead.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity? A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to TRS232ECDR and most substitute parts except HIN232ACBNZ, which has MSL 3 (168 Hours) requiring controlled storage conditions.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance status of the original TRS232ECDR.

Q: Which substitute offers the highest data rate? A: The MAX232EIDR, MAX232ECDR, LT1781CS#PBF, and LT1781CS#TRPBF all support 250kbps data rate, matching the original TRS232ECDR specification. The HIN232ACBNZ operates at 230kbps. Other alternatives operate at 200kbps or 120kbps.

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