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HomeProductsIntegrated Circuits (ICs)Interface - Drivers, Receivers, TransceiversISL81487LIP
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ISL81487LIP - Intersil

Manufacturer Part Number
ISL81487LIP
Manufacturer
Intersil (Renesas Electronics Corporation)
Allelco Part Number
32D-ISL81487LIP
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
21,073 pcs available, New & Original
Parts Description
IC TRANSCEIVER HALF 1/1 8DIP
Package
8-PDIP
Data sheet
-
RoHs Status
 
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In stock: 21073

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Specifications

ISL81487LIP Tech Specifications
Intersil - ISL81487LIP technical specifications, attributes, parameters and parts with similar specifications to Intersil - ISL81487LIP

Product Attribute Attribute Value
Manufacturer Intersil (Renesas Electronics Corporation)
Voltage - Supply 4.5V ~ 5.5V
Type Transceiver
Supplier Device Package 8-PDIP
Series -
Receiver Hysteresis 70 mV
Protocol RS422, RS485
Product Attribute Attribute Value
Package / Case 8-DIP (0.300", 7.62mm)
Package Tube
Operating Temperature -40°C ~ 85°C
Number of Drivers/Receivers 1/1
Mounting Type Through Hole
Duplex Half
Data Rate 5Mbps

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status RoHS non-compliant
ECCN EAR99
HTSUS 8542.39.0001

Frequently Asked Questions(FAQ)

What is the maximum data rate supported by the ISL81487LIP transceiver when operating in half-duplex mode over RS-485 differential signaling?
The ISL81487LIP supports a maximum data rate of 5 Mbps in half-duplex configuration using RS-485 protocol. This performance level enables reliable communication in industrial environments where noise immunity and signal integrity are critical, especially at distances up to 1200 meters with proper termination. The 5 Mbps capability reflects a balance between speed and robustness, suitable for many serial communication applications such as motor control, sensor networks, and building automation systems.
How does the receiver hysteresis of 70 mV in the ISL81487LIP improve noise immunity compared to standard RS-485 transceivers?
The 70 mV receiver hysteresis in the ISL81487LIP provides improved noise rejection by preventing false triggering due to small voltage fluctuations on the differential inputs. In noisy industrial environments, this feature reduces susceptibility to electromagnetic interference (EMI) and ground potential differences. Compared to transceivers with lower hysteresis values, the ISL81487LIP maintains stable logic state transitions even when common-mode noise approaches the threshold levels, enhancing overall system reliability without significantly limiting maximum data rates.
Can the ISL81487LIP be used in automotive applications requiring ISO 11898 compliance or similar functional safety standards?
No, the ISL81487LIP is not designed for automotive-grade applications requiring ISO 11898 or AEC-Q100 qualification. It operates within a commercial temperature range of -40°C to 85°C and lacks the extended thermal cycling, humidity resistance, and fault tolerance features required for automotive environments. Additionally, its RoHS non-compliant status further limits suitability for regulated markets. Designers should select alternative devices specifically certified for automotive use if deployment involves vehicles, engine control units, or safety-critical systems.
What supply voltage range must be maintained for reliable operation of the ISL81487LIP, and how does this impact interface design with 3.3V microcontrollers?
The ISL81487LIP requires a supply voltage between 4.5 V and 5.5 V for consistent performance. When interfacing with 3.3 V microcontroller I/O pins, level translation circuitry is necessary to avoid damaging the IC’s input stages. While the device can tolerate some undershoot during transient events, sustained operation below 4.5 V may lead to degraded noise margins and increased risk of misinterpretation of differential signals. A dedicated level-shifting buffer or bidirectional translator should be employed to ensure compatibility and long-term reliability.
How does the ISL81487LIP compare to newer RS-485 transceivers like the MAX485 or SN65HVD75 in terms of noise margin and power consumption?
Unlike modern low-power variants such as the SN65HVD75 (which offers 50 mV hysteresis and <1 mA quiescent current), the ISL81487LIP provides 70 mV hysteresis but typically consumes higher standby power due to legacy architecture. Its 5 Mbps bandwidth matches many contemporary devices, but newer parts often include integrated fail-safe biasing and lower supply current, improving efficiency in battery-powered or always-on networks. For new designs, replacing the ISL81487LIP with a modern equivalent generally yields better EMI performance and energy savings, though existing implementations may remain viable with careful layout.
Is it possible to operate multiple ISL81487LIP transceivers on the same RS-485 bus without additional termination components?
Yes, multiple ISL81487LIP devices can coexist on an RS-485 bus, but only if the total number of drivers active simultaneously remains limited to one—consistent with half-duplex operation. However, proper bus termination is essential: a 120 Ω resistor across the differential lines near the far end of the cable is recommended regardless of node count to prevent reflections. Without termination, signal integrity degrades rapidly above 10 meters at 5 Mbps, leading to bit errors and communication failures.
Why is the ISL81487LIP marked as obsolete, and what alternatives should engineers consider for new designs?
The ISL81487LIP has been classified as obsolete by Intersil, likely due to advancements in process technology and evolving industry standards. New designs should avoid reliance on this part for long-term availability. Alternatives include the ISL83485 (similar pinout and functionality) or more recent offerings from Analog Devices, TI, or ON Semiconductor that offer enhanced EMC performance, smaller packaging, and RoHS compliance. Migration to newer devices also improves support lifecycle and access to technical documentation updates.
What precautions should be taken when designing PCBs for the ISL81487LIP to minimize crosstalk and ground loops?
To optimize performance with the ISL81487LIP, maintain strict differential pair routing with matched trace lengths (within 5 mm tolerance) and keep A/B lines separated by at least three times the trace width to reduce capacitive coupling. Avoid running digital signals parallel to the differential pair over long distances. Ground planes should be solid beneath the transceiver, and star grounding techniques help mitigate ground loops. Given its through-hole package, ensure adequate thermal relief and mechanical stability to prevent solder joint fatigue under vibration.
Does the ISL81487LIP support hot-plugging of nodes on an RS-485 network?
The ISL81487LIP does not incorporate built-in protection against hot-plugging transients such as ESD clamping diodes or slew-rate control. Connecting or disconnecting powered nodes while the bus is live can induce voltage spikes that exceed the absolute maximum ratings, potentially damaging the IC. If hot-plug capability is required, external TVS diodes and series resistors on the A/B lines are strongly advised. Most modern RS-485 transceivers now include such protections by default.
How does the operating temperature range of -40°C to 85°C affect performance stability in high-vibration industrial environments?
Within its specified -40°C to 85°C range, the ISL81487LIP maintains stable propagation delay and threshold voltages across temperature extremes. However, mechanical stress from vibration combined with thermal cycling can compromise the 8-DIP package’s solder joints over time. Engineers should apply conformal coating and ensure robust PCB mounting to prevent intermittent connections. Performance parameters such as rise/fall times and receiver thresholds remain predictable within spec, but long-term reliability depends more on mechanical integrity than electrical characteristics alone.

Parts with Similar Specifications

The three parts on the right have similar specifications to Intersil ISL81487LIP

Product Attribute ISL81487LIPZ ISL81487LIP ISL81487LIB ISL81487IP
Part Number ISL81487LIPZ ISL81487LIP ISL81487LIB ISL81487IP
Manufacturer Renesas Electronics America Inc Renesas Electronics America Inc Intersil Renesas Electronics America Inc
Receiver Hysteresis - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Data Rate - - - -
Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Protocol - - - -
Series - - - -
Number of Drivers/Receivers - - - -
Voltage - Supply - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Duplex - - - -

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
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Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
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ISL81487LIP Image

ISL81487LIP

Intersil
32D-ISL81487LIP

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