ISL83483IP RS422/RS485 Half-Duplex Transceiver Equivalent & Substitute Parts

Part Overview

The ISL83483IP is a half-duplex RS422/RS485 transceiver manufactured by Renesas Electronics Corporation in 8-DIP packaging. This interface IC is classified as obsolete, with 3,066 units currently in stock. The part operates at 3V to 3.6V supply voltage and supports data rates up to 250 kbps with a receiver hysteresis of 50 mV. Due to its obsolete status and RoHS non-compliant classification, identifying functionally equivalent active alternatives is essential for new designs and long-term supply chain continuity.

Substiute Parts

ISL83483IP

Renesas Electronics CorporationIn Stock: 3108ISL83483IP Datasheet

Current PartRFQ

LT1785ACN8#PBF

Analog Devices Inc.In Stock: 2352LT1785ACN8#PBF Datasheet

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LT1785AIN8#PBF

Analog Devices Inc.In Stock: 3639LT1785AIN8#PBF Datasheet

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LT1785IN8#PBF

Analog Devices Inc.In Stock: 2307LT1785IN8#PBF Datasheet

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LTC1480CN8#PBF

Analog Devices Inc.In Stock: 2394LTC1480CN8#PBF Datasheet

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MAX3483CPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2023MAX3483CPA+ Datasheet

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MAX3483ECPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2457MAX3483ECPA+ Datasheet

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MAX3483EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2994MAX3483EPA+ Datasheet

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MAX3483EEPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3908MAX3483EEPA+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISL83483IP is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Protocol support: RS422 and RS485 half-duplex operation
• Driver/Receiver configuration: 1/1 (one driver, one receiver)
• Package type: 8-DIP (0.300", 7.62mm)
• Data rate capability: minimum 250 kbps
• Mounting type: Through Hole

Secondary Compatibility Factors:

• Voltage supply range compatibility or overlap with 3V to 3.6V
• Receiver hysteresis specification
• Operating temperature range coverage
• RoHS compliance status (for new designs)
• Product status (Active preferred for long-term availability)

Substitute parts are grouped into two categories:

Direct Substitutes (Voltage Supply 3V to 3.6V): MAX3483EPA+, MAX3483CPA+, MAX3483ECPA+, MAX3483EEPA+, and LTC1480CN8#PBF maintain the original 3V to 3.6V supply voltage specification, ensuring pin-compatible operation without circuit redesign.

Functional Alternatives (Voltage Supply 4.75V to 5.25V): LT1785AIN8#PBF, LT1785ACN8#PBF, and LT1785IN8#PBF operate at higher supply voltages and require circuit evaluation for compatibility. These parts are included due to identical protocol, duplex configuration, driver/receiver count, data rate, and package specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (3V to 3.6V Supply):

MAX3483EPA+ and MAX3483EEPA+ are the primary recommended substitutes. Both maintain identical voltage supply range (3V to 3.6V), receiver hysteresis (50 mV), and data rate (250 kbps) specifications. MAX3483EPA+ supports the full operating temperature range (-40°C to 85°C), matching the ISL83483IP. MAX3483EEPA+ also covers -40°C to 85°C operation. Both are Active products with ROHS3 compliance, ensuring long-term availability and regulatory alignment for new designs.

MAX3483CPA+ and MAX3483ECPA+ are functionally equivalent but operate within a narrower temperature range (0°C to 70°C). These are suitable for applications not requiring extended low-temperature operation.

For Supply Voltage Flexibility (4.75V to 5.25V Supply):

LT1785AIN8#PBF and LT1785IN8#PBF support the full operating temperature range (-40°C to 85°C) and are Active products with ROHS3 compliance. These require circuit redesign to accommodate the higher supply voltage but maintain protocol, duplex configuration, and package compatibility. Receiver hysteresis is 20 mV, lower than the ISL83483IP specification.

LT1785ACN8#PBF operates within 0°C to 70°C temperature range and is suitable for applications with restricted thermal requirements.

For Lower Data Rate Applications:

LTC1480CN8#PBF maintains 3V to 3.6V supply voltage compatibility but supports only 150 kbps data rate. This part is suitable only for applications where 150 kbps operation is acceptable. Receiver hysteresis is 40 mV.

Compliance and Availability:

All substitute parts are Active products with ROHS3 compliance, providing regulatory alignment and supply chain continuity. The ISL83483IP's obsolete status and RoHS non-compliance make transition to an active substitute essential for new designs and long-term production support.

Frequently Asked Questions (FAQ)

Q: Can MAX3483EPA+ directly replace ISL83483IP without circuit modification?

A: Yes. MAX3483EPA+ is pin-compatible and maintains identical voltage supply range (3V to 3.6V), receiver hysteresis (50 mV), data rate (250 kbps), operating temperature range (-40°C to 85°C), and 8-DIP package specification. No circuit redesign is required.

Q: What is the difference between MAX3483EPA+, MAX3483EEPA+, MAX3483CPA+, and MAX3483ECPA+?

A: All four parts share identical voltage supply (3V to 3.6V), receiver hysteresis (50 mV), and data rate (250 kbps) specifications. The primary difference is operating temperature range: EPA+ and EEPA+ support -40°C to 85°C, while CPA+ and ECPA+ support 0°C to 70°C. Select based on your application's thermal requirements.

Q: Why are LT1785 parts listed if they require 4.75V to 5.25V supply?

A: LT1785 parts are included as functional alternatives for applications where supply voltage can be adjusted to 4.75V to 5.25V. They maintain identical protocol (RS422/RS485), duplex configuration (half), driver/receiver count (1/1), data rate (250 kbps), and package (8-DIP). Circuit redesign is required to accommodate the higher supply voltage.

Q: Is LTC1480CN8#PBF a suitable substitute?

A: LTC1480CN8#PBF is functionally compatible in protocol, duplex configuration, driver/receiver count, and package. However, it supports only 150 kbps data rate compared to ISL83483IP's 250 kbps. Use this part only if your application operates at 150 kbps or lower.

Q: What does receiver hysteresis mean, and why does it vary among substitutes?

A: Receiver hysteresis is the voltage difference between the rising and falling threshold levels of the receiver input. ISL83483IP specifies 50 mV hysteresis. Substitutes with lower hysteresis (20 mV for LT1785 series, 40 mV for LTC1480CN8#PBF) provide tighter input thresholds, which may affect noise immunity in marginal signal conditions. Verify compatibility with your signal environment.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. The ISL83483IP is RoHS non-compliant, making transition to a compliant substitute necessary for new designs and regulatory compliance.

Q: What is the difference between tube and other packaging options?

A: All substitute parts are supplied in tube packaging. This is a standard reel or tube format for component distribution and does not affect electrical performance or pin compatibility.

Q: Can I use LT1785ACN8#PBF in an application requiring -40°C operation?

A: No. LT1785ACN8#PBF operates within 0°C to 70°C range and is not rated for -40°C operation. Use LT1785AIN8#PBF or LT1785IN8#PBF for extended low-temperature applications.

Q: What inventory levels are available for substitute parts?

A: Current inventory includes MAX3483EPA+ (2,900 units), MAX3483EEPA+ (3,800 units), LT1785AIN8#PBF (3,600 units), LTC1480CN8#PBF (2,304 units), MAX3483CPA+ (2,000 units), LT1785IN8#PBF (2,216 units), MAX3483ECPA+ (2,439 units), and LT1785ACN8#PBF (2,332 units). Verify current availability with your supplier.