TRS232ECD RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS232ECD is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This interface IC operates at 4.5V to 5.5V supply voltage with a 250 kbps data rate and 500 mV receiver hysteresis. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Substitute parts must maintain electrical compatibility across protocol, driver/receiver configuration, duplex mode, supply voltage, and package specifications.

Key Parameters

Parameter	TRS232ECD Value
Manufacturer	Texas Instruments
Protocol	RS232
Type	Transceiver
Number of Drivers/Receivers	2/2
Duplex Mode	Full
Voltage Supply Range	4.5V ~ 5.5V
Data Rate	250 kbps
Receiver Hysteresis	500 mV
Operating Temperature	0°C ~ 70°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the TRS232ECD are selected based on strict electrical and mechanical compatibility. The critical parameters determining substitutability are:

RS232 protocol implementation
2/2 driver/receiver configuration
Full-duplex operation
4.5V to 5.5V supply voltage compatibility
16-SOIC package form factor
Surface mount technology

Substitute parts are grouped into two categories: MFR Recommended parts (manufacturer-designated alternatives) and Direct alternatives (functionally equivalent parts meeting all core electrical parameters). All substitute parts maintain ROHS3 compliance and EAR99 export classification. Operating temperature ranges and data rates may vary within acceptable limits for RS232 applications, as the protocol does not mandate identical specifications across all implementations.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Supply Voltage	Data Rate	Receiver Hysteresis	Operating Temp	Package	Product Status
TRS232ECD	Texas Instruments	RS232	2/2	Full	4.5V ~ 5.5V	250 kbps	500 mV	0°C ~ 70°C	16-SOIC	Obsolete
MAX232EIDR	Texas Instruments	RS232	2/2	Full	4.5V ~ 5.5V	250 kbps	500 mV	-40°C ~ 85°C	16-SOIC	Active
LT1781CS#PBF	Analog Devices Inc.	RS232	2/2	Full	4.5V ~ 5.5V	250 kbps	400 mV	0°C ~ 70°C	16-SOIC	Active
LT1781CS#TRPBF	Analog Devices Inc.	RS232	2/2	Full	4.5V ~ 5.5V	250 kbps	400 mV	0°C ~ 70°C	16-SOIC	Active
MAX232ECSE+	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	4.5V ~ 5.5V	120 kbps	500 mV	0°C ~ 70°C	16-SOIC	Active
MAX232ECSE+T	Analog Devices Inc./Maxim Integrated	RS232	2/2	Full	4.5V ~ 5.5V	120 kbps	500 mV	0°C ~ 70°C	16-SOIC	Active
ADM232AARNZ	UMW	RS232	2/2	Full	4.5V ~ 5.5V	120 kbps	Not specified	-40°C ~ 85°C	16-SOIC	Active
ADM232AARNZ-REEL	Analog Devices Inc.	RS232	2/2	Full	4.5V ~ 5.5V	200 kbps	400 mV	-40°C ~ 85°C	16-SOIC	Active
ADM232AARNZ-REEL7	Analog Devices Inc.	RS232	2/2	Full	4.5V ~ 5.5V	200 kbps	400 mV	-40°C ~ 85°C	16-SOIC	Active
HIN232ACBNZ-T	Renesas Electronics Corporation	RS232	2/2	Full	4.5V ~ 5.5V	230 kbps	500 mV	0°C ~ 70°C	16-SOIC	Active
HIN232EIBNZ	Renesas Electronics Corporation	RS232	2/2	Full	4.5V ~ 5.5V	230 kbps	500 mV	-40°C ~ 85°C	16-SOIC	Active

Engineering Selection Recommendations

All listed substitute parts are active production components with ROHS3 compliance and EAR99 export classification, matching the regulatory status of the TRS232ECD. Selection should prioritize parts with active product status to ensure long-term availability and supply chain stability.

For applications requiring extended operating temperature range beyond 0°C to 70°C, the MAX232EIDR, ADM232AARNZ, ADM232AARNZ-REEL, ADM232AARNZ-REEL7, and HIN232EIBNZ support -40°C to 85°C operation.

For applications with data rate requirements at or above 250 kbps, the MAX232EIDR, LT1781CS#PBF, LT1781CS#TRPBF, ADM232AARNZ-REEL, ADM232AARNZ-REEL7, HIN232ACBNZ-T, and HIN232EIBNZ are suitable. Parts with lower data rates (MAX232ECSE+, MAX232ECSE+T, ADM232AARNZ at 120 kbps) are acceptable for lower-speed RS232 applications.

For receiver hysteresis matching at 500 mV, the MAX232EIDR, MAX232ECSE+, MAX232ECSE+T, HIN232ACBNZ-T, and HIN232EIBNZ are direct equivalents. Parts with 400 mV hysteresis (LT1781CS#PBF, LT1781CS#TRPBF, ADM232AARNZ-REEL, ADM232AARNZ-REEL7) provide tighter input threshold specifications.

Frequently Asked Questions (FAQ)

Q: Can I use MAX232ECSE+ or MAX232ECSE+T as direct replacements for TRS232ECD?

A: Yes. Both parts maintain RS232 protocol, 2/2 driver/receiver configuration, full-duplex operation, 4.5V to 5.5V supply voltage, and 16-SOIC package compatibility. The data rate specification is 120 kbps versus 250 kbps on the original part; this is acceptable for most RS232 applications operating below maximum protocol speed.

Q: What is the difference between LT1781CS#PBF and LT1781CS#TRPBF?

A: Both parts are electrically identical Analog Devices LT1781 transceivers. The primary difference is packaging: LT1781CS#PBF is supplied in Tube packaging, while LT1781CS#TRPBF is supplied in Tape & Reel format. Both maintain identical electrical specifications and 16-SOIC package form factor.

Q: Are ADM232AARNZ-REEL and ADM232AARNZ-REEL7 interchangeable?

A: Yes. Both are Analog Devices ADM232 transceivers with identical electrical specifications: 2/2 RS232 configuration, 4.5V to 5.5V supply, 200 kbps data rate, 400 mV receiver hysteresis, and -40°C to 85°C operating temperature. The suffix difference indicates reel packaging variants.

Q: Which substitute part most closely matches the TRS232ECD operating temperature range?

A: The HIN232ACBNZ-T and LT1781CS#PBF maintain the original 0°C to 70°C operating temperature specification. For applications requiring extended temperature operation, HIN232EIBNZ, MAX232EIDR, and ADM232 variants support -40°C to 85°C.

Q: Does receiver hysteresis affect RS232 compatibility?

A: Receiver hysteresis affects input threshold characteristics but does not prevent functional substitution in RS232 applications. The TRS232ECD specifies 500 mV hysteresis. Substitute parts with 400 mV hysteresis (LT1781 and ADM232 series) provide tighter input thresholds and are functionally compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and EAR99 export classification, matching the regulatory status of the TRS232ECD.

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