TRSF3221ECDBRG4 RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3221ECDBRG4 is a full-duplex RS232 transceiver manufactured by Texas Instruments, designed for single driver/receiver serial communication applications. This interface IC operates across a 3V to 5.5V supply range and supports data rates up to 1 Mbps with a 500 mV receiver hysteresis specification. The part is packaged in a 16-SSOP surface mount configuration and is ROHS3 compliant with unlimited moisture sensitivity rating.

The TRSF3221ECDBRG4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from Texas Instruments and Renesas Electronics Corporation, offering identical or compatible electrical and mechanical specifications for direct replacement in existing designs.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	1/1
Duplex	Full
Receiver Hysteresis	500 mV
Data Rate	1 Mbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3221ECDBRG4 is determined by strict equivalence across the following critical parameters:

Protocol: RS232
Number of Drivers/Receivers: 1/1 configuration
Duplex Mode: Full-duplex operation
Receiver Hysteresis: 500 mV
Data Rate: 1 Mbps minimum
Supply Voltage Range: 3V ~ 5.5V
Operating Temperature: 0°C ~ 70°C
Package Type: 16-SSOP surface mount
Compliance: ROHS3 compliant

Parametric equivalents from Texas Instruments (MAX3227CDBR, MAX3227ECDBR, SN75C3221DBR, SN75C3221EDBR, TRS3227ECDBR, TRSF3221CDBR, TRSF3221ECDBR) meet all electrical and mechanical specifications. Direct manufacturer alternatives from Renesas Electronics Corporation (ICL3221CAZ-T, ICL3221ECAZ, ICL3221ECAZ-T) provide functional compatibility with noted parameter variations in receiver hysteresis and data rate specifications.

Parameter Comparison

Part Number	Manufacturer	Protocol	Drivers/Receivers	Duplex	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Product Status	Inventory
TRSF3221ECDBRG4	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Discontinued	1010 Pcs
MAX3227CDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Last Time Buy	2860 Pcs
MAX3227ECDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Last Time Buy	2040 Pcs
SN75C3221DBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	3650 Pcs
SN75C3221EDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Last Time Buy	2060 Pcs
TRS3227ECDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Last Time Buy	2919 Pcs
TRSF3221CDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Last Time Buy	1410 Pcs
TRSF3221ECDBR	Texas Instruments	RS232	1/1	Full	500 mV	1 Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	1600 Pcs
ICL3221CAZ-T	Renesas Electronics	RS232	1/1	Full	300 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	5400 Pcs
ICL3221ECAZ	Renesas Electronics	RS232	1/1	Full	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	8175 Pcs
ICL3221ECAZ-T	Renesas Electronics	RS232	1/1	Full	500 mV	250 kbps	3V ~ 5.5V	0°C ~ 70°C	16-SSOP	Active	1613 Pcs

Engineering Selection Recommendations

For direct replacement of the discontinued TRSF3221ECDBRG4, select from Texas Instruments parametric equivalents that maintain identical electrical specifications: SN75C3221DBR (Active status, 3650 Pcs available) provides the highest inventory availability with full specification match. TRSF3221ECDBR (Active status, 1600 Pcs) offers the same base product line continuity.

For applications where data rate requirements do not exceed 250 kbps, Renesas Electronics ICL3221ECAZ or ICL3221ECAZ-T provide functional alternatives with superior inventory availability (8175 Pcs and 1613 Pcs respectively) and active product status. Both maintain the 500 mV receiver hysteresis specification and full RS232 compliance.

All recommended substitutes are ROHS3 compliant and operate within the 3V to 5.5V supply range and 0°C to 70°C temperature specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can ICL3221CAZ-T replace TRSF3221ECDBRG4 directly?

A: ICL3221CAZ-T is functionally compatible but operates at 250 kbps maximum data rate versus the 1 Mbps specification of TRSF3221ECDBRG4. It also specifies 300 mV receiver hysteresis instead of 500 mV. Use only in applications where these reduced specifications are acceptable.

Q: What is the difference between MAX3227CDBR and MAX3227ECDBR?

A: Both parts are parametric equivalents with identical electrical specifications. MAX3227CDBR is supplied in Tape & Reel packaging, while MAX3227ECDBR is supplied in Cut Tape & Digi-Reel format. Selection depends on packaging and handling requirements.

Q: Are all substitute parts ROHS3 compliant?

A: All Texas Instruments substitutes (MAX3227, SN75C3221, TRS3227, TRSF3221 series) are ROHS3 compliant. Renesas Electronics ICL3221 variants are also ROHS3 compliant.

Q: What is the moisture sensitivity difference between Texas Instruments and Renesas parts?

A: Texas Instruments TRSF3221 and MAX3227 series specify MSL 1 (Unlimited). Renesas Electronics ICL3221 series specify MSL 3 (168 Hours). This affects storage and handling requirements but does not impact electrical performance.

Q: Which substitute offers the best inventory availability?

A: ICL3221ECAZ from Renesas Electronics provides the highest inventory at 8175 Pcs with Active product status. For Texas Instruments equivalents, SN75C3221DBR offers 3650 Pcs availability.

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