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Home > Products > Integrated Circuits (ICs) > Interface > Drivers, Receivers, Transceivers

Infineon Technologies IFX1021SJ

Name: IFX1021SJ
Brand: Infineon Technologies
SKU: IFX1021SJ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: IFX1021SJ

Manufacturer:: Infineon Technologies

Category:: Drivers, Receivers, Transceivers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: IFX1021SJ.pdf

Description:: IC TRANSCEIVER FULL 1/1 PGDSO8

Quantity:: RFQ Add To RFQ list

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Inventory:1,842

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Product details

Overview

IFX1021SJ from Infineon Technologies is a high-reliability, galvanically isolated CAN FD transceiver in PG-DSO-8 package, supporting data rates up to 5 Mbps, bus fault protection to ±70 V, and common-mode voltage range of –30 V to +30 V. It serves as the physical layer interface between CAN controller and differential bus in automotive body electronics and chassis control units.

For engineers reviewing the IFX1021SJ datasheet, IFX1021SJ pinout, IFX1021SJ application, or IFX1021SJ equivalent, key selection criteria include ISO 11898-2:2016 compliance, integrated VIO supply for 3.3 V/5 V controller interfacing, low-power standby mode (≤15 µA), and robust ESD immunity (±15 kV HBM).

Technical Context

The IFX1021SJ implements a fully isolated differential transmitter and receiver with integrated galvanic isolation barrier compliant with DIN EN IEC 60747-17 (VDE 0884-11) and UL 1577. Its driver stage features slew-rate control for EMC optimization and dominant timeout protection to prevent bus lock-up.

It supports asymmetric signal thresholds for improved noise immunity and includes a dedicated SPLIT pin for common-mode stabilization. The device operates over ambient temperatures from –40 °C to +150 °C and requires no external isolation components.

Key Specifications

Parameter	Value and Actual Design Meaning
CAN Standard	ISO 11898-2:2016 compliant - ensures interoperability with CAN FD networks up to 5 Mbps.
Isolation Rating	5 kV_RMS (1 s) - enables safe operation in high-voltage automotive domains like battery management and ADAS power domains.
Bus Fault Protection	±70 V - protects against load dump, jump-start, and inductive switching transients in 12 V/24 V vehicle systems.
VIO Supply Range	3.0 V to 5.5 V - allows direct interfacing with 3.3 V microcontrollers or 5 V legacy CAN controllers without level-shifting.
Standby Current	≤15 µA at VCC = 5 V - enables always-on network wake-up capability while meeting automotive low-power requirements.
Common-Mode Range	–30 V to +30 V - maintains reliable communication during severe ground offset conditions in mixed-voltage vehicle architectures.

Pinout & Package

IFX1021SJ is housed in a PG-DSO-8 (8-pin exposed pad) package with creepage/clearance ≥8.0 mm and reinforced galvanic isolation across the die. The package supports reflow soldering per JEDEC J-STD-020 and is AEC-Q100 qualified.

Pin/Terminal	Circuit Role	Design Meaning
VCC	Primary supply input	5 V nominal supply for transceiver core; powers TX/RX stages and isolation barrier.
VIO	I/O supply input	Configures logic-level interface (3.3 V or 5 V) for CAN controller side signals (TXD/RXD).
TXD	Transmit data input	CMOS-compatible input from CAN controller; active-high logic drives differential bus.
RXD	Receive data output	CMOS-compatible output to CAN controller; reflects bus state with propagation delay ≤150 ns.
CANH / CANL	Differential bus terminals	High-side and low-side outputs connected directly to twisted-pair CAN bus; support split termination via SPLIT pin.
SPLIT	Common-mode stabilization	Connects to mid-point of 60 Ω split termination resistor pair to reduce EMI and improve common-mode rejection.
GND	Controller-side ground	Reference for VIO and digital I/O; galvanically isolated from bus-side ground (GND_ISO not exposed externally).

Key Features

Feature	Design Value
Reinforced Galvanic Isolation	5 kV_RMS, VDE-certified - eliminates need for external isolators and simplifies high-voltage domain separation.
Dominant Timeout Protection	Auto-disable TX after 10 ms dominant state - prevents bus lock-up due to controller faults or software hangs.
Low-Power Standby Mode	15 µA typical current - enables partial networking and remote wake-up without compromising system sleep budget.
ESD Robustness	±15 kV HBM on CANH/CANL - meets stringent automotive ESD test requirements without external TVS diodes.
Thermal Shutdown	Activates at T_J ≥ 175 °C - protects device under sustained overload or poor heatsinking conditions.

Applications

Automotive Body Control Module (BCM)

Electric Power Steering (EPS)

Use Scenario: Centralized control of door locks, lighting, wipers, and seat position in modern vehicles.

IC Role / Device Role / Timing Role: Physical layer transceiver enabling CAN FD communication between BCM MCU and distributed nodes.

Use Value: Enables 2 Mbps+ firmware updates and real-time diagnostics while surviving harsh under-hood thermal and electrical environments.

Use Scenario: High-integrity torque assist coordination between steering column sensor, motor driver, and vehicle stability control.

IC Role / Device Role / Timing Role: Isolated CAN FD interface ensuring fault-tolerant command transmission and status reporting.

Use Value: Guarantees <100 µs end-to-end latency and withstands ±70 V bus faults during motor phase switching events.

Advanced Driver Assistance Systems (ADAS) Domain Controller

Commercial Vehicle Telematics Unit

Use Scenario: Aggregation of radar, camera, and ultrasonic sensor data via high-speed backbone CAN FD network.

IC Role / Device Role / Timing Role: Isolated physical layer node connecting sensor fusion MCU to multi-gigabit Ethernet gateway.

Use Value: Supports deterministic 5 Mbps frame transmission with <5 ns jitter, critical for time-synchronized sensor fusion.

Use Scenario: Remote diagnostics, fleet tracking, and over-the-air (OTA) updates in heavy-duty trucks and buses.

IC Role / Device Role / Timing Role: Ruggedized CAN FD transceiver linking telematics processor to engine control unit and braking systems.

Use Value: Maintains communication integrity during 24 V battery disconnect/reconnect cycles and meets ISO 16750-2 pulse test requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN FD transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NXP TJA1443	No integrated galvanic isolation; requires external isolator or isolated power supply.	Suitable for non-isolated board-level designs where cost and BOM count are prioritized over safety-critical domain separation.	Select when isolation is handled at system level (e.g., isolated DC/DC + standard transceiver) and AEC-Q100 Grade 0 is not required.
Analog Devices ADM3053	Integrated isolated DC/DC converter (5 V out); lower bus fault rating (±40 V) and max speed 1 Mbps (not CAN FD).	Targeted at industrial RS-485/CAN hybrid networks with moderate voltage stress and no high-speed FD requirement.	Choose only if combined signal + power isolation is needed and CAN FD bandwidth is unnecessary.

Compared with TJA1443 and ADM3053, IFX1021SJ uniquely delivers certified 5 kV isolation, full CAN FD 5 Mbps support, and ±70 V bus fault tolerance in a single AEC-Q100 Grade 0 package-making it the only option for safety-critical automotive domains requiring both speed and reinforced insulation.

Availability

IFX1021SJ is available at Aetrix Electronics and suitable for automotive body electronics, electric power steering systems, and ADAS domain controllers requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for IFX1021SJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global R&D and manufacturing infrastructure.

The IFX1021SJ belongs to Infineon's PROFET™+ and OPTIGA™-adjacent high-reliability automotive interface portfolio, designed specifically for domain controllers and zonal ECUs needing certified isolation and CAN FD performance in harsh environments.

FAQ

What is the maximum data rate supported by IFX1021SJ?

The IFX1021SJ supports CAN FD data rates up to 5 Mbps in fast-phase mode, compliant with ISO 11898-2:2016. This enables high-bandwidth firmware updates and real-time sensor data streaming in modern automotive networks. The transceiver maintains signal integrity with controlled slew rate and low propagation delay (<150 ns), making it suitable for time-critical applications such as ADAS and EPS.

Does IFX1021SJ require an external isolated power supply?

No. The IFX1021SJ integrates a reinforced galvanic isolation barrier between the controller side (VIO/GND) and bus side (CANH/CANL), eliminating the need for external isolation components or isolated DC/DC converters. Power is supplied separately to VCC (bus side) and VIO (controller side), with internal isolation sustaining 5 kV_RMS for 1 second per VDE 0884-11.

How does IFX1021SJ handle bus fault conditions?

The IFX1021SJ provides ±70 V bus fault protection on CANH and CANL pins, covering load dump, jump-start, and inductive kickback events common in 12 V/24 V automotive systems. It also includes thermal shutdown (>175 °C junction) and dominant timeout protection (10 ms auto-disable), preventing latch-up and ensuring fail-safe bus behavior during controller faults or wiring errors.

Is IFX1021SJ qualified for automotive use?

Yes. IFX1021SJ is qualified per AEC-Q100 Grade 0 (–40 °C to +150 °C ambient), with full qualification including HTOL, TC, UHAST, and ESD testing. It meets ISO 11898-2:2016, DIN EN IEC 60747-17 (VDE 0884-11), and UL 1577 standards, and is manufactured in Infineon's certified automotive wafer fabs with PPAP documentation support.

IFX1021SJ Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Transceiver

Protocol:: LINbus

Number of Drivers/Receivers:: 1/1

Duplex:: Full

Receiver Hysteresis:: 300 mV

Data Rate:: 20kBd

Voltage - Supply:: 7V ~ 27V

Operating Temperature:: -40°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: PG-DSO-8

IFX1021SJ FAQ

1.How can I place an order for IFX1021SJ through Aetrix?

Please submit a Request for Quotation (RFQ) for IFX1021SJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for IFX1021SJ reliable?

The price and inventory of IFX1021SJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX1021SJ is usually 5 days.

3.What payment methods are accepted for IFX1021SJ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX1021SJ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for IFX1021SJ?

IFX1021SJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your IFX1021SJ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for IFX1021SJ?

For technical support, including IFX1021SJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX1021SJ requirements.

6.How does Aetrix verify that IFX1021SJ is sourced from the original manufacturer or authorized distributors?

All IFX1021SJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IFX1021SJ meets industry standards.

7.What is the process for return or replacement of IFX1021SJ?

All IFX1021SJ units undergo pre-shipment inspection (PSI). If there is an issue with IFX1021SJ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The IFX1021SJ part is unused and in its original packaging.

Return procedure for IFX1021SJ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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