SN65HVD32D Equivalent & Substitute Parts

Part Overview

The SN65HVD32D is a full-duplex RS422/RS485 transceiver manufactured by Texas Instruments in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a 3V to 3.6V supply range with a 1Mbps data rate and 50mV receiver hysteresis, designed for industrial communication applications requiring reliable serial interface functionality.

Key Parameters

Parameter	SN65HVD32D
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS422, RS485
Drivers/Receivers	1/1
Duplex	Full
Package	8-SOIC (0.154", 3.90mm Width)
Voltage Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Data Rate	1Mbps
Receiver Hysteresis	50mV
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the SN65HVD32D is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS422/RS485 full-duplex transceiver
Package: 8-SOIC form factor (0.154", 3.90mm Width)
Driver/Receiver Configuration: 1/1
Supply Voltage Range: 3V ~ 3.6V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount

Secondary Consideration Parameters:

Data Rate: Substitute parts operating at 250kbps or higher maintain functional compatibility
Receiver Hysteresis: Variations (15mV, 50mV, 100mV) are acceptable within RS422/RS485 specifications
Product Status: Active status preferred for long-term availability
Compliance: ROHS3 and REACH compliance maintained across all substitutes

All substitute parts listed meet the primary compatibility criteria. Variations in data rate and receiver hysteresis do not prevent functional substitution in applications designed for the SN65HVD32D.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	MSL Rating	Inventory
SN65HVD32D	Texas Instruments	Obsolete	1Mbps	50mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	2004 Pcs
SN65HVD32DR	Texas Instruments	Active	1Mbps	50mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	66850 Pcs
ADM3071EARZ	Analog Devices Inc.	Active	250kbps	100mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	7700 Pcs
ISL83071EIBZA-T	Renesas Electronics Corporation	Active	250kbps	15mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	3	2348 Pcs
MAX3071EESA+	Analog Devices Inc./Maxim Integrated	Active	250kbps	100mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	12235 Pcs
MAX3071EESA+T	Analog Devices Inc./Maxim Integrated	Active	250kbps	100mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	2000 Pcs
SP3071EEN-L	MaxLinear, Inc.	Active	250kbps	15mV	3.3V	-40°C ~ 85°C	8-SOIC	1	5387 Pcs
ADM3077EARZ	Analog Devices Inc.	Active	16Mbps	100mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	1	1301 Pcs
ISL83488IBZ	Renesas Electronics Corporation	Active	250kbps	50mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	3	7476 Pcs
ISL83488IBZ-T	Renesas Electronics Corporation	Active	250kbps	50mV	3V ~ 3.6V	-40°C ~ 85°C	8-SOIC	3	5100 Pcs

Engineering Selection Recommendations

Primary Recommendation: SN65HVD32DR

The SN65HVD32DR is the direct active equivalent from Texas Instruments, maintaining identical electrical specifications (1Mbps data rate, 50mV receiver hysteresis) and supply voltage range. This part carries ROHS3 compliance and MSL-1 rating. With 66,850 units in stock, it provides superior long-term availability compared to the obsolete SN65HVD32D.

Secondary Recommendations by Application Requirements:

For applications requiring higher data rates, ADM3077EARZ supports 16Mbps operation while maintaining all other critical parameters. This part is suitable for designs where increased bandwidth provides future flexibility.

For cost-optimized procurement with adequate data rate margin, ISL83488IBZ-T and MAX3071EESA+T both operate at 250kbps with 50mV receiver hysteresis, matching the original part's noise immunity characteristics. Both maintain 3V to 3.6V supply compatibility and -40°C to 85°C temperature range.

SP3071EEN-L operates at 3.3V fixed supply (within the 3V-3.6V range) and provides 250kbps data rate with 15mV hysteresis. This part is suitable for 3.3V-only systems where the tighter hysteresis specification is acceptable.

All recommended substitutes maintain ROHS3 compliance and surface mount 8-SOIC packaging, ensuring PCB-level compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the original SN65HVD32D?

A: Yes. The SN65HVD32D operates at 1Mbps. All substitute parts listed operate at 250kbps or higher, providing adequate margin for RS422/RS485 applications. Lower data rate capability does not prevent substitution if your application operates below the substitute part's rated speed.

Q: What is the difference between receiver hysteresis values (15mV, 50mV, 100mV)?

A: Receiver hysteresis determines the voltage difference required between assertion and de-assertion of the receiver output. Higher hysteresis (100mV) provides greater noise immunity in electrically noisy environments. Lower hysteresis (15mV) allows faster signal transitions. The original SN65HVD32D specifies 50mV. All substitute parts with different hysteresis values remain functionally compatible with RS422/RS485 protocol requirements.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use 8-SOIC surface mount packaging with identical 0.154" (3.90mm) width. Packaging is mechanically and electrically interchangeable. Differences exist only in tape/reel versus tube packaging formats, which affect procurement and handling but not circuit functionality.

Q: Why do some substitutes specify 3.3V supply while the original specifies 3V-3.6V?

A: SP3071EEN-L specifies 3.3V fixed supply, which falls within the 3V-3.6V range of the original part. This part is suitable for systems operating at 3.3V. Other substitutes maintain the full 3V-3.6V range, providing broader supply voltage flexibility.

Q: What is MSL rating and why does it vary?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient conditions before soldering. MSL-1 (unlimited) parts have no time restrictions. MSL-3 (168 hours) parts require soldering within 168 hours of bag opening. For standard manufacturing environments, both ratings are acceptable. MSL-1 parts offer greater flexibility in inventory management.

Q: Is the SN65HVD32DR a direct replacement for SN65HVD32D?

A: Yes. SN65HVD32DR is the active production equivalent with identical electrical specifications, supply voltage, temperature range, and 8-SOIC packaging. The only difference is product status (active versus obsolete) and packaging format (cut tape/reel versus tube). It is the recommended direct replacement.

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