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Home > Products > Integrated Circuits (ICs) > Interface - Drivers, Receivers, Transceivers > SP1490ECN-L/TR
MaxLinear, Inc.
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SP1490ECN-L/TR

Manufacturer Part Number:
SP1490ECN-L/TR
Manufacturer / Brand
MaxLinear, Inc.
Part of Description:
IC TRANSCEIVER FULL 1/1 8SOIC
Datasheets:
SP1490ECN-L/TR(1).pdfSP1490ECN-L/TR(2).pdfSP1490ECN-L/TR(3).pdfSP1490ECN-L/TR(4).pdfSP1490ECN-L/TR(5).pdfSP1490ECN-L/TR(6).pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 5201 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number SP1490ECN-L/TR
Manufacturer / Brand MaxLinear, Inc.
Stock Quantity 5201 pcs Stock
Category Integrated Circuits (ICs) > Interface - Drivers, Receivers, Transceivers
Description IC TRANSCEIVER FULL 1/1 8SOIC
Lead Free Status / RoHS Status: RoHS Compliant
RFQ SP1490ECN-L/TR Datasheets SP1490ECN-L/TR Details PDF
SP1490ECN-L/TR Details PDF for FR.pdf
SP1490ECN-L/TR Details PDF for KR.pdf
SP1490ECN-L/TR Details PDF for IT.pdf
SP1490ECN-L/TR Details PDF for DE.pdf
SP1490ECN-L/TR Details PDF for ES.pdf
Voltage - Supply 4.75V ~ 5.25V
Type Transceiver
Supplier Device Package 8-SOIC
Series -
Receiver Hysteresis 70 mV
Protocol RS422, RS485
Package / Case 8-SOIC (0.154', 3.90mm Width)
Package Tape & Reel (TR)
Operating Temperature 0°C ~ 70°C
Number of Drivers/Receivers 1/1
Mounting Type Surface Mount
Duplex Full
Data Rate 20Mbps

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



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SP1490ECN-L/TR Product Details:

The SP1490ECN-L/TR is a high-performance interface transceiver developed by Exar Corporation, specifically designed for robust RS422 and RS485 communication protocols. This integrated circuit offers a full-duplex solution for reliable data transmission in industrial and communication applications, addressing critical design challenges in serial communication interfaces.

Engineered as a compact 8-SOIC surface-mount device, the transceiver provides exceptional signal integrity with a robust design that supports data rates up to 20 Mbps. Its optimized electrical characteristics include a receiver hysteresis of 70mV, ensuring stable signal reception and noise immunity in challenging communication environments.

Powered by a standard 5V supply (4.75V ~ 5.25V), the transceiver is well-suited for a wide range of industrial and embedded communication systems. Its operational temperature range of 0°C to 70°C makes it suitable for various commercial and light industrial applications where consistent performance is crucial.

Key advantages include its lead-free and RoHS-compliant construction, which ensures environmental sustainability and compliance with modern electronic manufacturing standards. The device features a single driver and receiver configuration, making it ideal for point-to-point or multi-drop communication networks.

The transceiver is particularly valuable in applications requiring reliable serial communication, such as industrial automation, process control systems, networking equipment, and telecommunications infrastructure. Its compact 8-SOIC package and tape & reel packaging facilitate straightforward surface-mount integration and streamlined manufacturing processes.

While direct equivalent models are not explicitly specified, similar transceivers from manufacturers like Texas Instruments, Maxim Integrated, and Linear Technology offer comparable RS422/RS485 interface solutions. Potential alternatives might include the MAX487, ST487, and similar full-duplex transceiver implementations.

The SP1490ECN-L/TR represents a reliable, efficient solution for engineers seeking a robust, compact interface transceiver with excellent signal transmission capabilities across various communication protocols.

SP1490ECN-L/TR Image
SP1490ECN-L/TR (1)

SP1490ECN-L/TR Key Technical Attributes

Manufacturer Part Number SP1490ECN-L/TR

Manufacturer Exar Corporation

Type Transceiver

SP1490ECN-L/TR Packing Size

Package Type 8-SOIC

Package Material SOP-8

Size 8-SOIC (0.154", 3.90mm Width)

Pin Configuration Standard

Packaging Tape & Reel (TR)

SP1490ECN-L/TR Application

Designed for communication in Industrial, Networking, and Telecommunication sectors utilizing RS422 and RS485 protocols.

SP1490ECN-L/TR Features

This product, SP1490ECN-L/TR, is a 1/1 transceiver functioning fully under RS422 and RS485 protocols, making it ideal for high-speed communication. It supports a data rate of up to 20Mbps. Its operating voltage ranges from 4.75 V to 5.25 V. The receiver's hysteresis is at 70mV, which helps in enhancing noise margins and improving data integrity. The device operates well within a temperature range of 0°C to 70°C.

SP1490ECN-L/TR Quality and Safety Features

The SP1490ECN-L/TR is compliant with RoHS indicating it's lead-free and safe for a wide range of applications. It is classified under Moisture Sensitivity Level 1 (Unlimited), allowing for maximum durability and prolonged storage without performance degradation.

SP1490ECN-L/TR Compatibility

This transceiver part is fully compatible with RS422 and RS485 protocols and is suitable for full duplex communication.

SP1490ECN-L/TR Datasheet PDF

For the most accurate and detailed information about the SP1490ECN-L/TR, including full specifications, pin configurations, and application guides, customers are encouraged to download the datasheet PDF available on our website.

Quality Distributor

IC-Components is a premium distributor of Exar Corporation products. We guarantee genuine parts like the SP1490ECN-L/TR with excellent customer support and competitive pricing. Get a quote through our website and ensure your projects receive the best components.

Frequently Asked Questions

Can the SP1490ECN-L/TR be used in a 3.3V system, or does it strictly require a 5V supply?
The SP1490ECN-L/TR requires a supply voltage between 4.75 V and 5.25 V as specified in its datasheet; it is not compatible with 3.3V systems. Attempting to operate it at 3.3V will result in insufficient drive levels for RS-485/RS-422 signaling and potential failure to meet differential voltage thresholds. For 3.3V designs, consider alternatives like the MAX3485 or SN65HVD72, which are designed for lower-voltage operation.
What are the key differences between the SP1490ECN-L/TR and the MAX485 when replacing legacy designs?
While both the SP1490ECN-L/TR and MAX485 are 5V full-duplex RS-485 transceivers in 8-SOIC packages, the SP1490ECN-L/TR supports a higher data rate (20 Mbps vs. 2.5 Mbps on the MAX485) and includes 70 mV of receiver hysteresis for improved noise immunity. However, the SP1490ECN-L/TR lacks the MAX485’s integrated slew-rate limiting, making it less suitable for long cables where EMI control is critical. Ensure signal integrity analysis if migrating from MAX485 to SP1490ECN-L/TR in high-speed applications.
Is the SP1490ECN-L/TR suitable for multi-drop RS-485 networks with more than 32 unit loads?
The SP1490ECN-L/TR presents a standard 1-unit load on the RS-485 bus, meaning up to 32 devices can be connected in a single network under typical conditions. If your design requires more than 32 nodes, you must use transceivers with ¼-unit or ⅛-unit load ratings (e.g., SP3485EN-L/TR). Using the SP1490ECN-L/TR beyond 32 nodes may cause signal degradation and communication failures due to excessive bus loading.
How should I handle unused driver and receiver pins when using the SP1490ECN-L/TR in half-duplex mode?
When configuring the SP1490ECN-L/TR for half-duplex operation, tie the unused driver input (DI) to ground and the unused receiver output (RO) should be left unconnected (floating). The driver enable (DE) and receiver enable (/RE) must be tied together and controlled by a single GPIO to switch between transmit and receive modes. Avoid leaving DE or /RE floating, as this can cause bus contention or undefined states.
Can the SP1490ECN-L/TR operate reliably in industrial environments with temperatures below 0°C?
No, the SP1490ECN-L/TR has an operating temperature range of 0°C to 70°C, making it unsuitable for industrial or outdoor applications that experience sub-zero conditions. For extended temperature ranges (e.g., -40°C to +85°C), consider the SP1490EEN-L/TR (Exar’s industrial-grade version) or equivalent parts like the ADM485ARZ from Analog Devices, which are qualified for harsh environments.
What termination and biasing practices are recommended when using the SP1490ECN-L/TR in long-cable RS-485 installations?
For cable lengths exceeding 10 meters, terminate the differential lines (A and B) with a 120 Ω resistor at the far end to prevent reflections. Additionally, include fail-safe biasing (e.g., 560 Ω pull-up on B and pull-down on A to ground) to ensure a known idle state when no driver is active. The SP1490ECN-L/TR does not include internal biasing, so external resistors are required to avoid floating inputs and false triggering.
Does the SP1490ECN-L/TR support hot-swapping or live insertion into an active RS-485 bus?
The SP1490ECN-L/TR does not include built-in hot-swap protection. Inserting or removing the device while the bus is active can cause latch-up, transient glitches, or damage due to ESD or inrush currents. For hot-swap applications, use transceivers with integrated ESD protection (>±15 kV IEC 61000-4-2) and current-limiting features, such as the SN65HVD1780 or ISO1432, which are designed for live insertion.
What layout considerations are critical when designing a PCB for the SP1490ECN-L/TR to maintain signal integrity at 20 Mbps?
To maintain signal integrity at 20 Mbps, keep differential traces (A and B) tightly coupled, matched in length, and routed away from noisy digital signals. Use a solid ground plane beneath the transceiver and minimize stub lengths. Place the 0.1 μF decoupling capacitor as close as possible to the VCC pin of the SP1490ECN-L/TR. Avoid vias in the differential path, and ensure impedance control (~120 Ω differential) for long traces.
Can the SP1490ECN-L/TR be used in point-to-point RS-422 applications, and what configuration is required?
Yes, the SP1490ECN-L/TR can be used in full-duplex RS-422 point-to-point links. Connect the driver outputs (Y, Z) to the remote receiver inputs, and the local receiver inputs (A, B) to the remote driver outputs. Ensure proper termination (100 Ω to 120 Ω) at the receiver end and avoid connecting multiple receivers in parallel unless they are high-impedance types. The SP1490ECN-L/TR’s 20 Mbps capability makes it well-suited for high-speed RS-422 video or instrumentation links.
Are there known compatibility issues when replacing the SP1490ECN-L/TR with the SP3485EN-L/TR in an existing design?
The SP3485EN-L/TR is a half-duplex only transceiver, while the SP1490ECN-L/TR supports full-duplex operation. Direct replacement is only possible if your application uses half-duplex communication. Additionally, the SP3485EN-L/TR has a lower data rate (10 Mbps) and different pinout for DE//RE control. Verify timing, enable logic, and bus topology before substitution, as improper replacement may lead to bus contention or reduced performance.

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