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Renesas ISL83491IBZ

RS-422/RS-485 Interface IC 14LD -40+85 3V RS-485 TRANS DUP

Ovaga Certification

Brands: Renesas Technology Corp

Mfr.Part #: ISL83491IBZ

Datasheet: ISL83491IBZ Datasheet (PDF)

Package/Case: SOIC-14

Product Type: Interface ICs

RoHS Status:

Stock Condition: 2141 pcs, New Original

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ISL83491IBZ General Description

These Renesas RS-485/RS-422 devices are BiCMOS 3. 3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Unlike competitive devices, this Renesas family is specified for 10% tolerance supplies (3V to 3. 6V). The ISL83483 and ISL83488 use slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Data rates up to 10Mbps are achievable by using the ISL83485, ISL83490, or ISL83491, which feature higher slew rates. Logic inputs (for example, DI and DE) accept signals in excess of 5. 5V, making them compatible with 5V logic families. Receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high output if Rx inputs are floating. All devices present a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network. Driver (Tx) outputs are short-circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive. The ISL83488, ISL83490, and ISL83491 are configured for full duplex (separate Rx input and Tx output pins) applications. The ISL83488 and ISL83490 are offered in space saving 8 Ld packages for applications not requiring Rx and Tx output disable functions (for example, point-to-point and RS-422). Half duplex configurations (ISL83483, ISL83485) multiplex the Rx inputs and Tx outputs to provide transceivers with Rx and Tx disable functions in 8 Ld packages.



  • Operate from a Single +3.3V Supply (10% Tolerance)
  • Interoperable with 5V Logic
  • High Data Rates: up to 10Mbps
  • Single Unit Load Allows up to 32 Devices on the Bus
  • Slew Rate Limited Versions for Error Free Data Transmission (ISL83483, ISL83488): up to 250kbps
  • Low Current Shutdown Mode (ISL83483, ISL83485, ISL83491): 15nA
  • -7V to +12V Common Mode Input Voltage Range
  • Three State Rx and Tx Outputs (Except ISL83488, ISL83490)
  • 10ns Propagation Delay, 1ns Skew (ISL83485, ISL83490, ISL83491)
  • Full Duplex and Half Duplex Pinouts
  • Current Limiting and Thermal Shutdown for driver Overload Protection
  • Pb-free available


  • Industrial control systems
  • Building automation systems
  • HVAC systems
  • Security systems
  • Motor control systems


Parameter Value Parameter Value
Pin Count 14 Package Category Small Outline Packages
Released Date Jan 11, 2017


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TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

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1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Equivalent Parts

For the ISL83491IBZ component, you may consider these replacement and alternative parts:

Part Number




Part Number:  SN65HVD485EDGK




Part Number:  MAX485CPA


Package:  DIP-8

Description:   Industrial CAN Transceiver with Ultra Low Power Sleep mode and Remote Bus 40 to 125

Part Number:  ADM485ARZ


Package:  SOP-8

Description:   Differential Line Transceiver RS485 Driver, 4.75V-5.25V supply, SOIC-8

Part Number:  ST485EBDR


Package:  SO-8

Description:   【15KV ESD PROTECTED, LOW POWER RS-485/RS-422 TRANSCEIVER,Buffers & Line Drivers Hi-Spd Lo Pwr Trans

Part Number:  LTC485CN8


Package:  DIP-8

Description:   Low Power RS485 Interface Transceiver

Part Number:  DS485N




Part Number:  SP485EN-L/TR




Part Number:  MC1488P




Part Number:  NTE485




Part Number:  HIN202CBN




Datasheet PDF

Preliminary Specification ISL83491IBZ PDF Download

Key points

  • The ISL83491IBZ chip is a high-speed, low-power, quad-channel RS-485/RS-422 transceiver. It is designed for use in industrial automation and control systems, as well as in applications that require long-distance data communication. The chip offers low voltage operation, robust ESD protection, and a wide temperature range, making it suitable for harsh environments.
  • Equivalent

    The equivalent products of the ISL83491IBZ chip are the MAX3311E and the SN65LBC176.
  • Features

    The ISL83491IBZ is a quad transceiver with 3.3V compatibility and ESD protection. It features a RS-485/RS-422 interface, operates in full-duplex mode, has a data rate of up to 52Mbps, and supports up to 256 nodes on the bus. Additionally, it has low power consumption and can withstand harsh industrial environments, making it suitable for various applications.
  • Pinout

    The ISL83491IBZ is an 8-pin, dual power supply RS-485/RS-422 transceiver. It can operate on a voltage range of 3V to 5.5V and has a data rate of up to 20Mbps. The pinout includes GND (1), A (2), B (3), Y (4), Y (5), RE (6), DE (7), and Vcc (8).
  • Manufacturer

    Intersil is the manufacturer of the ISL83491IBZ. It is a semiconductor company that specializes in designing and manufacturing power management and precision analog circuits.
  • Application Field

    The ISL83491IBZ is a transceiver that can be used in a variety of applications, including industrial automation, motor control, and consumer electronics. It is suitable for bidirectional communication between microcontrollers and peripheral devices, and it can handle both RS-232 and RS-485 protocols.
  • Package

    The ISL83491IBZ chip comes in an SOP (Small Outline Package) package type. It has a 16-pin form and a compact size, typically measuring around 7.7 mm x 5.25 mm.

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