SN65HVD22D Equivalent & Substitute Parts

Part Overview

The SN65HVD22D is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The SN65HVD22D operates within a 4.5V to 5.5V supply range with a maximum data rate of 500kbps and receiver hysteresis of 130mV, designed for industrial communication applications requiring half-duplex serial transmission.

Key Parameters

Parameter	SN65HVD22D
Manufacturer	Texas Instruments
Protocol	RS422, RS485
Type	Transceiver Half Duplex
Number of Drivers/Receivers	1/1
Data Rate	500kbps
Voltage Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Receiver Hysteresis	130mV
Package/Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SN65HVD22D is determined by the following critical parameters: RS422/RS485 protocol compatibility, half-duplex 1/1 driver/receiver configuration, 8-SOIC package format, surface mount mounting type, and operating temperature range of -40°C to 85°C. The substitute parts are grouped into two categories based on supply voltage compatibility:

Category 1: 4.75V ~ 5.25V Supply Voltage (Direct Voltage Domain Match)

ADM4853WARZ-RL7 (Analog Devices Inc.)
SP483EEN-L/TR (MaxLinear, Inc.)

These parts maintain the original 5V supply voltage specification of the SN65HVD22D with tighter tolerance ranges.

Category 2: 3V ~ 3.6V Supply Voltage (Low-Voltage Alternative)

ISL3179EIBZ (Renesas Electronics Corporation)
ISL3179EIBZ-T (Renesas Electronics Corporation)
ISL43485IBZ (Renesas Electronics Corporation)
ISL43485IBZ-T (Renesas Electronics Corporation)
ISL83483IBZ (Renesas Electronics Corporation)
ISL83483IBZ-T (Renesas Electronics Corporation)
ISL4485EIBZ (Renesas Electronics Corporation)

These parts operate at lower supply voltages and are suitable for applications where 3.3V or 3.6V power rails are available.

Parameter Comparison

Part Number	Manufacturer	Protocol	Duplex	Drivers/Receivers	Data Rate	Voltage Supply	Operating Temp	Receiver Hysteresis	Package	Product Status
SN65HVD22D	Texas Instruments	RS422, RS485	Half	1/1	500kbps	4.5V ~ 5.5V	-40°C ~ 85°C	130mV	8-SOIC	Obsolete
ADM4853WARZ-RL7	Analog Devices Inc.	RS422, RS485	Half	1/1	10Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	20mV	8-SOIC	Active
SP483EEN-L/TR	MaxLinear, Inc.	RS422, RS485	Half	1/1	250kbps	4.75V ~ 5.25V	-40°C ~ 85°C	20mV	8-SOIC	Active
ISL3179EIBZ	Renesas Electronics	RS422, RS485	Half	1/1	40Mbps	3V ~ 3.6V	-40°C ~ 125°C	28mV	8-SOIC	Active
ISL3179EIBZ-T	Renesas Electronics	RS422, RS485	Half	1/1	40Mbps	3V ~ 3.6V	-40°C ~ 85°C	28mV	8-SOIC	Active
ISL43485IBZ	Renesas Electronics	RS422, RS485	Half	1/1	50Mbps	3V ~ 3.6V	-40°C ~ 85°C	50mV	8-SOIC	Active
ISL43485IBZ-T	Renesas Electronics	RS422, RS485	Half	1/1	50Mbps	3V ~ 3.6V	-40°C ~ 85°C	50mV	8-SOIC	Active
ISL83483IBZ	Renesas Electronics	RS422, RS485	Half	1/1	250kbps	3V ~ 3.6V	-40°C ~ 85°C	50mV	8-SOIC	Active
ISL83483IBZ-T	Renesas Electronics	RS422, RS485	Half	1/1	250kbps	3V ~ 3.6V	-40°C ~ 85°C	50mV	8-SOIC	Active
ISL4485EIBZ	Renesas Electronics	RS422, RS485	Half	1/1	20Mbps	4.5V ~ 5.5V	-40°C ~ 85°C	70mV	8-SOIC	Obsolete

Engineering Selection Recommendations

For applications requiring direct replacement of the SN65HVD22D in existing 5V systems, ADM4853WARZ-RL7 and SP483EEN-L/TR are the primary candidates. Both parts are active products with ROHS3 compliance and maintain the 4.75V to 5.25V supply voltage specification. ADM4853WARZ-RL7 offers superior data rate capability (10Mbps) and automotive-grade qualification, while SP483EEN-L/TR provides data rate matching closer to the original specification (250kbps).

For new designs utilizing 3.3V or 3.6V power supplies, the Renesas ISL series transceivers (ISL3179EIBZ, ISL3179EIBZ-T, ISL43485IBZ, ISL43485IBZ-T, ISL83483IBZ, ISL83483IBZ-T) are active products with extended temperature range options. Selection within this group depends on required data rate: ISL43485 variants support 50Mbps, ISL3179 variants support 40Mbps, and ISL83483 variants support 250kbps.

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Packaging options include Tube, Cut Tape (CT) & Digi-Reel, and Tape & Reel (TR) formats to accommodate different procurement and assembly workflows.

Frequently Asked Questions (FAQ)

Q: Can I use a 3.3V supply transceiver as a direct replacement for the SN65HVD22D in a 5V system?

A: No. The SN65HVD22D requires 4.5V to 5.5V supply voltage. Using a 3V to 3.6V part in a 5V system will result in component damage. Select ADM4853WARZ-RL7 or SP483EEN-L/TR for 5V applications.

Q: What is the difference between ISL3179EIBZ and ISL3179EIBZ-T?

A: Both parts are functionally identical with identical electrical specifications. The primary difference is packaging: ISL3179EIBZ is supplied in Tube format, while ISL3179EIBZ-T is supplied in Cut Tape (CT) & Digi-Reel format. Selection depends on assembly line requirements and procurement preferences.

Q: Does the higher data rate of substitute parts affect compatibility?

A: No. Higher data rate capability is a superset of lower data rate operation. A 50Mbps transceiver operates correctly at 500kbps. The SN65HVD22D's 500kbps specification is fully supported by all substitute parts listed.

Q: Are all substitute parts in the same 8-SOIC package?

A: Yes. All substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB footprint and mounting compatibility with the original SN65HVD22D design.

Q: Which substitute part has the closest receiver hysteresis to the original SN65HVD22D?

A: The SN65HVD22D has 130mV receiver hysteresis. ISL4485EIBZ provides 70mV hysteresis, which is the closest match among active products. However, all substitute parts maintain RS422/RS485 protocol compliance and will function correctly in applications designed for the original part.

Q: Is the ISL4485EIBZ a viable substitute despite being obsolete?

A: ISL4485EIBZ is classified as obsolete. For new designs and ongoing production, select from active products: ADM4853WARZ-RL7, SP483EEN-L/TR, or the Renesas ISL series (ISL3179, ISL43485, ISL83483 variants).

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