SN65C3232DBR Equivalent & Substitute Parts

Part Overview

The SN65C3232DBR is a 2/2 transceiver full RS232 interface IC manufactured by Texas Instruments in a 16-SSOP package. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement. The SN65C3232DBR operates across a 3V to 5.5V supply range with a 1Mbps data rate and full duplex capability, making it suitable for legacy RS232 communication applications requiring industrial temperature ranges (-40°C to 85°C).

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	SN65C3232DBR
Type	Transceiver
Protocol	RS232
Drivers/Receivers	2/2
Duplex	Full
Package	16-SSOP (0.209", 5.30mm Width)
Data Rate	1Mbps
Supply Voltage	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Receiver Hysteresis	300 mV
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the SN65C3232DBR is determined by the following critical parameters: RS232 protocol compliance, 2/2 driver/receiver configuration, full duplex operation, 16-pin package format, supply voltage range (3V to 5.5V), and operating temperature range (-40°C to 85°C). Parts are grouped into three categories based on substitution type:

MFR Recommended Substitutes maintain identical electrical specifications and package format while offering active product status. These parts are direct functional replacements with no design modifications required.

Parametric Equivalents share the same package and core electrical parameters but may differ in product status or specific performance characteristics such as data rate or receiver hysteresis. These require verification of application-specific requirements.

Direct Manufacturer Alternatives are from different manufacturers (Renesas Electronics Corporation) and may have variations in receiver hysteresis, data rate, operating temperature range, or moisture sensitivity level. These require careful parameter matching before implementation.

Parameter Comparison

Part Number	Manufacturer	Package	Data Rate	Supply Voltage	Operating Temp	Receiver Hysteresis	Product Status	Inventory
SN65C3232DBR	Texas Instruments	16-SSOP	1Mbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Obsolete	12800 Pcs
TRSF3232EIDR	Texas Instruments	16-SOIC	1Mbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Active	3493 Pcs
SN65C3232EDBR	Texas Instruments	16-SSOP	1Mbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Active	2200 Pcs
TRSF3232EIDBR	Texas Instruments	16-SSOP	1Mbps	3V ~ 5.5V	-40°C ~ 85°C	300 mV	Obsolete	1722 Pcs
ICL3232EIAZ	Renesas Electronics	16-SSOP	250kbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	Active	23920 Pcs
ICL3232CVZ	Renesas Electronics	16-TSSOP	250kbps	3V ~ 5.5V	0°C ~ 70°C	300 mV	Active	1811 Pcs
ICL3232CVZ-T	Renesas Electronics	16-TSSOP	250kbps	3V ~ 5.5V	0°C ~ 70°C	300 mV	Active	1424 Pcs
ICL3232ECAZ	Renesas Electronics	16-SSOP	250kbps	3V ~ 5.5V	0°C ~ 70°C	500 mV	Active	1270 Pcs
ICL3232ECAZ-T	Renesas Electronics	16-SSOP	250kbps	3V ~ 5.5V	0°C ~ 70°C	500 mV	Active	30400 Pcs
ICL3232ECV-16Z	Renesas Electronics	16-TSSOP	250kbps	3V ~ 5.5V	0°C ~ 70°C	500 mV	Active	1992 Pcs
ICL3232EIAZ-T	Renesas Electronics	16-SSOP	250kbps	3V ~ 5.5V	-40°C ~ 85°C	500 mV	Active	30100 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Electrical Performance): SN65C3232EDBR is the primary active substitute, maintaining identical 16-SSOP package format, 1Mbps data rate, 300 mV receiver hysteresis, and full -40°C to 85°C operating temperature range. This part requires no PCB layout modifications and provides full functional compatibility.

For Package Format Change (SOIC Alternative): TRSF3232EIDR offers identical electrical specifications (1Mbps, 300 mV hysteresis, -40°C to 85°C) but uses a 16-SOIC package (0.154", 3.90mm width) instead of 16-SSOP. This substitution requires PCB redesign to accommodate the different package footprint.

For Extended Temperature Range with Renesas Devices: ICL3232EIAZ-T maintains the -40°C to 85°C operating temperature range in 16-SSOP package but operates at 250kbps data rate with 500 mV receiver hysteresis. This part is suitable for applications where the reduced data rate is acceptable and extended temperature operation is required.

For Commercial Temperature Range Applications: ICL3232CVZ-T and ICL3232ECAZ-T operate within 0°C to 70°C temperature range. These parts are not suitable for industrial temperature applications requiring -40°C operation. Selection between these depends on receiver hysteresis requirements (300 mV vs. 500 mV).

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original SN65C3232DBR.

Frequently Asked Questions (FAQ)

Q: Can I use TRSF3232EIDR as a direct replacement for SN65C3232DBR? A: TRSF3232EIDR is electrically equivalent but uses a 16-SOIC package instead of 16-SSOP. While electrical performance is identical (1Mbps, 300 mV hysteresis, -40°C to 85°C), the different package footprint requires PCB layout modifications. It is not a pin-compatible drop-in replacement.

Q: What is the difference between 16-SSOP and 16-TSSOP packages? A: 16-SSOP has a 0.209" (5.30mm) body width, while 16-TSSOP has a 0.173" (4.40mm) body width. These are different package formats with different pin pitches and footprints. They are not interchangeable without PCB redesign.

Q: Why do Renesas ICL3232 parts have lower data rates (250kbps vs. 1Mbps)? A: The ICL3232 series is specified for 250kbps maximum data rate, which is lower than the SN65C3232DBR's 1Mbps specification. For applications requiring 1Mbps operation, the Texas Instruments SN65C3232EDBR or TRSF3232EIDR are required.

Q: Can I use ICL3232CVZ-T in an application requiring -40°C operation? A: No. ICL3232CVZ-T is rated for 0°C to 70°C operating temperature only. For applications requiring -40°C operation, use SN65C3232EDBR, TRSF3232EIDR, or ICL3232EIAZ-T.

Q: What does receiver hysteresis affect in RS232 applications? A: Receiver hysteresis determines the voltage difference between the rising and falling threshold levels of the input comparator. Higher hysteresis (500 mV) provides greater noise immunity but may affect timing-sensitive applications. The SN65C3232DBR specifies 300 mV hysteresis, which is matched by SN65C3232EDBR and TRSF3232EIDR.

Q: Are all listed parts RoHS3 compliant? A: Yes. All parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with environmental and regulatory requirements.

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