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ISL81487IB Equivalent & Substitute Parts
Part Overview
The ISL81487IB is a half-duplex RS422/RS485 transceiver manufactured by Renesas Electronics Corporation in an 8-SOIC surface mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for new designs or ongoing production requirements. The ISL81487IB operates at 5Mbps data rate with a 4.5V to 5.5V supply voltage range and supports industrial temperature ranges from -40°C to 85°C. Due to its obsolete status, active equivalent parts and functional substitutes are required for design continuity and component sourcing.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | ISL81487IB |
| Manufacturer | Renesas Electronics Corporation |
| Type | Transceiver |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Data Rate | 5Mbps |
| Receiver Hysteresis | 70 mV |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution of the ISL81487IB is determined by strict equivalence across the following critical parameters:
Primary Equivalence Criteria:
- Protocol: RS422/RS485 half-duplex operation
- Number of Drivers/Receivers: 1/1 configuration
- Package: 8-SOIC form factor
- Mounting Type: Surface mount
- Operating Temperature Range: -40°C to 85°C
- Supply Voltage Range: 4.5V to 5.5V
- Data Rate: 5Mbps or higher
- Receiver Hysteresis: 70 mV
Parametric Equivalents are Renesas ISL81487 series variants that maintain identical electrical specifications and differ only in packaging format (tube vs. reel) or product status (active vs. obsolete). These include ISL81487EIBZ, ISL81487IBZ, ISL81487LIBZ, and ISL8485IBZ.
Similar Substitutes are alternative manufacturer parts from Analog Devices and Maxim Integrated that meet the core functional requirements but may have variations in data rate, receiver hysteresis, supply voltage tolerance, or operating temperature range. These parts maintain RS422/RS485 half-duplex 1/1 transceiver functionality in 8-SOIC packages but require design verification for specific parameter deviations.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Protocol | Data Rate | Receiver Hysteresis | Supply Voltage | Operating Temp | RoHS Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| ISL81487IB | Renesas | Obsolete | RS422, RS485 | 5Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | RoHS non-compliant | Tube |
| ISL81487EIBZ | Renesas | Active | RS422, RS485 | 5Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ISL81487IBZ | Renesas | Active | RS422, RS485 | 5Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ISL81487LIBZ | Renesas | Active | RS422, RS485 | 5Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ISL8485IBZ | Renesas | Active | RS422, RS485 | 5Mbps | 70 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ADM1487EARZ | Analog Devices | Active | RS422, RS485 | 2.5Mbps | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | ROHS3 Compliant | Tube |
| ADM1487EARZ-REEL7 | Analog Devices | Active | RS422, RS485 | 2.5Mbps | 70 mV | 4.75V ~ 5.25V | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape & Digi-Reel |
| LTC1487CS8#PBF | Analog Devices | Active | RS422, RS485 | 250kbps | 45 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | ROHS3 Compliant | Tube |
| LTC1487CS8#TRPBF | Analog Devices | Active | RS422, RS485 | 250kbps | 45 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | ROHS3 Compliant | Tape & Reel |
| MAX14780EESA+T | Analog Devices/Maxim | Active | RS422, RS485 | 20Mbps | 50 mV | 4.5V ~ 5.5V | -40°C ~ 85°C | ROHS3 Compliant | Cut Tape & Digi-Reel |
| MAX1487CSA+ | Analog Devices/Maxim | Active | RS422, RS485 | 2.5Mbps | 70 mV | 4.75V ~ 5.25V | 0°C ~ 70°C | ROHS3 Compliant | Tube |
Engineering Selection Recommendations
Parametric Equivalents (Direct Replacement):
The ISL81487EIBZ, ISL81487IBZ, ISL81487LIBZ, and ISL8485IBZ are parametric equivalents of the ISL81487IB. All four parts maintain identical electrical specifications including 5Mbps data rate, 70 mV receiver hysteresis, 4.5V to 5.5V supply voltage, and -40°C to 85°C operating temperature. The primary distinction is product status: these parts are active and ROHS3 compliant, addressing the obsolescence and RoHS non-compliance of the original ISL81487IB. These equivalents are suitable for direct substitution in new designs and production.
Similar Substitutes with Parameter Deviations:
ADM1487EARZ and ADM1487EARZ-REEL7 (Analog Devices) operate at 2.5Mbps, which is lower than the ISL81487IB specification of 5Mbps. The supply voltage range is narrower (4.75V to 5.25V vs. 4.5V to 5.5V). These parts are suitable only for applications where the lower data rate and tighter supply voltage tolerance are acceptable.
LTC1487CS8#PBF and LTC1487CS8#TRPBF (Analog Devices) have significant deviations: 250kbps data rate, 45 mV receiver hysteresis, narrower supply voltage range (4.75V to 5.25V), and reduced operating temperature range (0°C to 70°C). These parts are suitable only for low-speed, commercial-temperature applications.
MAX14780EESA+T (Analog Devices/Maxim) exceeds the ISL81487IB specifications with 20Mbps data rate and 50 mV receiver hysteresis. Supply voltage and operating temperature ranges match the original part. This part is suitable for applications requiring higher data rates.
MAX1487CSA+ (Analog Devices/Maxim) operates at 2.5Mbps with 70 mV receiver hysteresis but has a narrower supply voltage range (4.75V to 5.25V) and reduced operating temperature range (0°C to 70°C). This part is suitable for commercial-temperature applications with lower data rate requirements.
All substitute parts listed are ROHS3 compliant and active in production, addressing the obsolescence concern of the original ISL81487IB.
Frequently Asked Questions (FAQ)
Q: Can I directly replace ISL81487IB with ISL81487EIBZ?
A: Yes. ISL81487EIBZ is a parametric equivalent with identical electrical specifications. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Direct substitution is supported without design modification.
Q: What is the difference between ISL81487EIBZ, ISL81487IBZ, and ISL81487LIBZ?
A: All three parts are parametric equivalents with identical electrical specifications. The differences are in packaging format and internal device variants. ISL81487EIBZ, ISL81487IBZ, and ISL81487LIBZ differ only in suffix designation, which may indicate different manufacturing processes or internal configurations. Consult the manufacturer datasheet for specific variant details. All are suitable for direct replacement of ISL81487IB.
Q: Can I use ADM1487EARZ as a substitute for ISL81487IB?
A: ADM1487EARZ is a functional substitute but with parameter deviations. Data rate is reduced to 2.5Mbps (vs. 5Mbps), and supply voltage range is narrower (4.75V to 5.25V vs. 4.5V to 5.5V). Substitution is possible only if your application operates at 2.5Mbps or lower and maintains supply voltage within 4.75V to 5.25V.
Q: Why is the LTC1487CS8 not recommended as a direct substitute?
A: LTC1487CS8 has significant parameter deviations: 250kbps data rate (vs. 5Mbps), 45 mV receiver hysteresis (vs. 70 mV), narrower supply voltage range (4.75V to 5.25V), and reduced operating temperature range (0°C to 70°C). This part is suitable only for low-speed, commercial-temperature applications and is not a general-purpose substitute.
Q: What is the advantage of MAX14780EESA+T over ISL81487IB?
A: MAX14780EESA+T supports 20Mbps data rate, which exceeds the ISL81487IB specification of 5Mbps. Supply voltage and operating temperature ranges are identical. This part is suitable for applications requiring higher data rates. However, receiver hysteresis is 50 mV (vs. 70 mV), which may affect noise immunity in some applications.
Q: Are all substitute parts RoHS compliant?
A: Yes. All substitute parts listed are ROHS3 compliant. The original ISL81487IB is RoHS non-compliant. Substitution with any of the listed parts addresses RoHS compliance requirements for new designs.
Q: What packaging options are available for ISL81487 equivalents?
A: ISL81487EIBZ, ISL81487IBZ, and ISL81487LIBZ are supplied in tube packaging. ADM1487EARZ is available in tube, while ADM1487EARZ-REEL7 is supplied in cut tape and Digi-Reel format. LTC1487CS8#PBF is supplied in tube, and LTC1487CS8#TRPBF is supplied in tape and reel. MAX14780EESA+T is supplied in cut tape and Digi-Reel format. MAX1487CSA+ is supplied in tube. Select packaging based on production volume and assembly requirements.
Q: Can I use MAX1487CSA+ in an industrial temperature application?
A: MAX1487CSA+ has an operating temperature range of 0°C to 70°C, which is limited to commercial temperature range. The ISL81487IB operates from -40°C to 85°C. MAX1487CSA+ is not suitable for industrial temperature applications requiring -40°C to 85°C operation.
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