SN75HVD08P Equivalent & Substitute Parts

Part Overview

The SN75HVD08P is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in 8-DIP through-hole packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing system support. The SN75HVD08P operates across a 3V to 5.5V supply range with a 10Mbps data rate capability and 35mV receiver hysteresis, designed for industrial communication applications requiring half-duplex serial protocols.

Key Parameters

Parameter	SN75HVD08P
Manufacturer	Texas Instruments
Type	Transceiver Half Duplex
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Receiver Hysteresis	35 mV
Data Rate	10 Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package	8-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the SN75HVD08P is determined by the following critical parameters: protocol compatibility (RS422/RS485), duplex mode (half-duplex), driver/receiver configuration (1/1), package type (8-DIP through-hole), and supply voltage range overlap. The substitute parts are grouped into two categories:

Category 1: Direct Package Equivalent (8-DIP Through-Hole) Parts maintaining identical through-hole 8-DIP packaging with RS422/RS485 half-duplex 1/1 transceiver configuration. These allow direct socket replacement in existing PCB designs.

Category 2: Surface Mount Alternative (8-SOIC) The SN65HVD08DR provides functional equivalence with surface-mount packaging, suitable for new designs or PCB redesigns where through-hole mounting is not required.

Substitution validity is determined by: protocol match (RS422/RS485), duplex configuration (half-duplex), transceiver count (1/1), and supply voltage range compatibility with the application circuit.

Parameter Comparison

Part Number	Manufacturer	Protocol	Duplex	Drivers/Receivers	Receiver Hysteresis	Data Rate	Voltage Supply	Operating Temp	Package	Mounting	Product Status
SN75HVD08P	Texas Instruments	RS422, RS485	Half	1/1	35 mV	10 Mbps	3V ~ 5.5V	0°C ~ 70°C	8-DIP	Through Hole	Obsolete
SN65HVD08DR	Texas Instruments	RS422, RS485	Half	1/1	35 mV	—	3V ~ 5.5V	-40°C ~ 85°C	8-SOIC	Surface Mount	Active
ADM485JNZ	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	5 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Through Hole	Active
LTC1480CN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	40 mV	150 KBd	3V ~ 3.6V	0°C ~ 70°C	8-DIP	Through Hole	Active
LTC1480IN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	2.5 Mbps	3V ~ 3.6V	-40°C ~ 85°C	8-DIP	Through Hole	Active
LTC1482CN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	30 mV	4 Mbps	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Through Hole	Active
LTC1482IN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	30 mV	4 Mbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Through Hole	Active
LTC1483IN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	45 mV	250 kbps	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Through Hole	Active
LTC485CN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	—	4.75V ~ 5.25V	0°C ~ 70°C	8-DIP	Through Hole	Active
LTC485IN8#PBF	Analog Devices Inc.	RS422, RS485	Half	1/1	70 mV	—	4.75V ~ 5.25V	-40°C ~ 85°C	8-DIP	Through Hole	Active

Engineering Selection Recommendations

For Direct Replacement (Through-Hole 8-DIP): ADM485JNZ, LTC1482CN8#PBF, LTC1482IN8#PBF, LTC485CN8#PBF, and LTC485IN8#PBF maintain 8-DIP through-hole packaging compatible with existing PCB layouts. All substitute parts are ROHS3 compliant and active products with ongoing manufacturer support. ADM485JNZ and LTC1482 series parts operate within the original 0°C to 70°C temperature range, matching the SN75HVD08P thermal specification. LTC1482IN8#PBF and LTC485IN8#PBF extend the operating range to -40°C to 85°C for applications requiring enhanced temperature performance.

For New Designs (Surface Mount): SN65HVD08DR provides an active, surface-mount alternative from Texas Instruments with identical receiver hysteresis (35mV) and supply voltage range (3V ~ 5.5V). This part is suitable for new PCB designs where surface-mount technology is preferred and offers extended operating temperature range (-40°C ~ 85°C).

Supply Voltage Compatibility: The SN75HVD08P operates across 3V to 5.5V. Substitutes fall into two voltage groups: 3V ~ 5.5V compatible (SN65HVD08DR) and 4.75V ~ 5.25V compatible (ADM485JNZ, LTC1482 series, LTC1483IN8#PBF, LTC485 series). Verify application supply voltage before selection.

Data Rate Considerations: The SN75HVD08P specifies 10Mbps capability. Substitute parts with lower data rate specifications (LTC1480 series at 150KBd to 2.5Mbps, LTC1483IN8#PBF at 250kbps) are suitable only for applications operating below their rated data rates.

Frequently Asked Questions (FAQ)

Q: Can I use LTC1480CN8#PBF or LTC1480IN8#PBF as direct replacements for SN75HVD08P? A: These parts are functionally compatible for RS422/RS485 half-duplex communication but operate at reduced data rates (150KBd and 2.5Mbps respectively) compared to the SN75HVD08P (10Mbps). They are suitable only if your application data rate is below their specifications. Additionally, the LTC1480 series operates at 3V ~ 3.6V supply voltage, which is narrower than the SN75HVD08P range.

Q: What is the difference between LTC1482CN8#PBF and LTC1482IN8#PBF? A: Both parts are identical in electrical specifications (4Mbps data rate, 30mV hysteresis, 4.75V ~ 5.25V supply). The primary difference is operating temperature range: LTC1482CN8#PBF operates 0°C ~ 70°C, while LTC1482IN8#PBF extends to -40°C ~ 85°C. Select based on your application's thermal requirements.

Q: Is SN65HVD08DR a suitable replacement if my PCB is designed for through-hole components? A: SN65HVD08DR uses 8-SOIC surface-mount packaging and cannot be directly installed in through-hole sockets. It requires PCB redesign or the use of surface-mount to through-hole adapter modules. For through-hole compatibility, select from the 8-DIP packaged alternatives.

Q: Do all substitute parts meet RoHS3 compliance? A: All listed substitute parts are ROHS3 compliant, matching the SN75HVD08P compliance status. All parts are also REACH unaffected.

Q: What is receiver hysteresis and why does it vary among substitutes? A: Receiver hysteresis defines the voltage difference between the rising and falling threshold levels of the receiver input. The SN75HVD08P specifies 35mV. Substitute parts range from 30mV to 70mV. Lower hysteresis improves noise immunity in clean signal environments; higher hysteresis provides better performance in noisy industrial settings. Select based on your signal integrity requirements.

Q: Can I substitute parts with different supply voltage ranges? A: Only if your application circuit operates within the overlapping voltage range. The SN75HVD08P (3V ~ 5.5V) overlaps with SN65HVD08DR (3V ~ 5.5V) across the full range. Parts rated 4.75V ~ 5.25V are compatible only with applications operating within this narrower window. Verify your power supply specifications before selection.

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