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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

Renesas ASI4UE-E-G1-ST

Name: ASI4UE-E-G1-ST
Brand: Renesas
SKU: ASI4UE-E-G1-ST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ASI4UE-E-G1-ST

Manufacturer:: Renesas

Category:: Specialized

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: ASI4UE-E-G1-ST.pdf

Description:: IC INTERFACE SPECIALIZED V3.0

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ASI4UE-E-G1-ST from Integrated Device Technology is a universal AS-i interface IC compliant with AS-Interface Complete Specification V3.0, designed for master, slave, repeater, and bus-monitor roles in industrial fieldbus systems. It integrates physical layer transceiver, protocol handling, on-chip electronic inductor (55 mA drive), EEPROM-based configuration storage, and AS-i safety mode-operating from −25 °C to +105 °C in SOP28 package for high-temperature industrial automation applications.

For engineers reviewing the ASI4UE-E-G1-ST datasheet, ASI4UE-E-G1-ST pinout, ASI4UE-E-G1-ST application, or ASI4UE-E-G1-ST equivalent, this device supports dual-mode crystal operation (8/16 MHz), configurable LED status outputs per V3.0, IR-addressing channel for wireless setup, and data pre-processing including bit-selective inversion and input filtering-critical for deterministic AS-i node design and safety-critical module qualification.

Technical Context

The ASI4UE-E-G1-ST implements a Manchester-II encoded bidirectional AS-i physical layer with floating transmitter/receiver architecture enabling symmetrical high-power bus driving. Its integrated electronic inductor replaces external coils, reducing BOM count while maintaining 55 mA output current capability for direct AS-i bus powering.

It features dual operational domains: standard mode with full data pre-processing (filtering, inversion) and AS-i Safety Mode-a dedicated state disabling filters and synchronous I/O to guarantee ≤40 ms fault reaction time matching legacy A²SI performance. Configuration is stored in internal EEPROM and accessible via parameter port (P[3:0]/PST) or IRD addressing channel.

Key Specifications

Parameter	Value and Actual Design Meaning
AS-i Compliance	Full compliance with AS-Interface Complete Specification V3.0-enables interoperability with certified masters/slaves and safety-certified infrastructure.
Operating Temperature	−25 °C to +105 °C-supports deployment in high-ambient environments like motor control cabinets and hydraulic power units.
Package	SOP28 RoHS-compliant package-provides mechanical robustness and thermal dissipation suitable for reflow-soldered industrial PCBs.
Crystal Support	Automatic 8 MHz / 16 MHz detection-eliminates manual configuration and enables single-BOM flexibility across timing variants.
LED Outputs	Two configurable LED drivers supporting all V3.0 status indication modes-replaces discrete driver circuitry and simplifies front-panel diagnostics.
Current Drive	On-chip electronic inductor with 55 mA capability-removes need for external coil and associated snubber components in AS-i bus interface.
Safety Mode	Dedicated AS-i Safety Mode disables input filters and synchronous I/O to guarantee ≤40 ms fault reaction time-required for replacement of A²SI in certified safety modules.

Pinout & Package

SOP28 package (5.3 mm × 10.2 mm, 1.27 mm pitch) optimized for thermal performance in extended-temperature industrial applications. Pinout validated per IDT ASI4U-E datasheet Figure 6.1 and Table 6.1.

Pin/Terminal	Circuit Role	Design Meaning
UIN / UOUT	AS-i bus power interface	Direct connection to two-wire AS-i cable; UIN supplies internal regulator, UOUT delivers regulated 5 V to external logic or sensors.
ASIP / ASIN	Differential AS-i data transceiver	Floating Manchester-II receiver/transmitter pair-enables symmetrical high-power bus signaling without ground reference dependency.
DI[3:0] / DO[3:0]	Configurable digital I/O	Four-bit parallel data path supporting slave I/O expansion, fixed-output driving, or safety-mode deterministic exchange.
IRD	Addressing channel input	Supports AC-current or CMOS-mode IR-addressing for wireless setup-enables commissioning without physical access to node.
P[3:0] / PST	Parameter port	EEPROM programming interface for configuration; P0–P2 support special functions including safety mode enable and filter control.
FID	Fault indication input	Monitors external power failure or thermal shutdown signals-triggers AS-i bus error reporting and safe state transition.
LED1 / LED2	Status indicator outputs	Drive external LEDs per V3.0-defined status patterns-reduces firmware overhead for visual diagnostics.
OSC1 / OSC2	Crystal oscillator interface	Accepts 8 MHz or 16 MHz fundamental-mode crystals with automatic frequency detection-no external configuration required.

Key Features

Feature	Design Value
Universal AS-i node role support	Single IC serves as master, slave, repeater, or monitor-reduces SKU count and simplifies platform design across AS-i system layers.
Integrated electronic inductor	Replaces bulky external coil and snubber network-cuts board area by >30 mm² and eliminates coil-related EMI tuning effort.
AS-i Safety Mode	Hardware-enforced disable of input filters and synchronous I/O-ensures deterministic ≤40 ms fault response identical to A²SI for certified safety module reuse.
Configurable data pre-processing	Bit-selective inversion and programmable input filtering (time constants from 0.5 ms to 100 ms)-enables noise suppression in electrically noisy factory environments.
IR-addressing channel	Enables wireless node identification and parameter loading via handheld programmer-eliminates need for wired programming connectors on sealed enclosures.

Applications

AS-i Slave Module	AS-i Master Module
Use Scenario: Distributed I/O node connecting proximity sensors and solenoid valves in packaging machinery. IC Role / Device Role / Timing Role: AS-i physical layer interface and protocol handler-translates microcontroller SPI/I²C commands into Manchester-II AS-i frames and manages bus arbitration. Use Value: Enables 2-wire power+data delivery over 100 m unshielded cable, reducing wiring cost by 40% versus traditional analog I/O.	Use Scenario: Central controller in automotive assembly line conveying system managing 31 slave nodes. IC Role / Device Role / Timing Role: AS-i master transceiver and cycle scheduler-generates timing-critical AS-i cycles (max 5 ms period) and validates slave responses. Use Value: Integrates bus power regulation, clock generation, and error monitoring-reducing master PCB component count by 12+ discrete parts.
AS-i Safety Module	AS-i Bus Monitor
Use Scenario: Emergency stop subsystem in CNC machine tool requiring SIL2 certification. IC Role / Device Role / Timing Role: Safety-critical AS-i interface operating in AS-i Safety Mode-guarantees ≤40 ms fault reaction time for Category 3/PLd architectures. Use Value: Allows drop-in replacement of legacy A²SI in certified designs when configured per IDT safety guidelines-preserving existing safety validation.	Use Scenario: Diagnostic unit installed at AS-i trunk junction to detect intermittent short circuits or node failures. IC Role / Device Role / Timing Role: Passive bus monitor capturing and decoding all AS-i traffic-identifies CRC errors, address collisions, and timing violations. Use Value: Provides real-time visibility into AS-i health without disrupting normal operation-reducing mean time to repair (MTTR) by 65% in multi-zone plants.

AS-i Slave Module

AS-i Master Module

Use Scenario: Distributed I/O node connecting proximity sensors and solenoid valves in packaging machinery.

IC Role / Device Role / Timing Role: AS-i physical layer interface and protocol handler-translates microcontroller SPI/I²C commands into Manchester-II AS-i frames and manages bus arbitration.

Use Value: Enables 2-wire power+data delivery over 100 m unshielded cable, reducing wiring cost by 40% versus traditional analog I/O.

Use Scenario: Central controller in automotive assembly line conveying system managing 31 slave nodes.

IC Role / Device Role / Timing Role: AS-i master transceiver and cycle scheduler-generates timing-critical AS-i cycles (max 5 ms period) and validates slave responses.

Use Value: Integrates bus power regulation, clock generation, and error monitoring-reducing master PCB component count by 12+ discrete parts.

AS-i Safety Module

AS-i Bus Monitor

Use Scenario: Emergency stop subsystem in CNC machine tool requiring SIL2 certification.

IC Role / Device Role / Timing Role: Safety-critical AS-i interface operating in AS-i Safety Mode-guarantees ≤40 ms fault reaction time for Category 3/PLd architectures.

Use Value: Allows drop-in replacement of legacy A²SI in certified designs when configured per IDT safety guidelines-preserving existing safety validation.

Use Scenario: Diagnostic unit installed at AS-i trunk junction to detect intermittent short circuits or node failures.

IC Role / Device Role / Timing Role: Passive bus monitor capturing and decoding all AS-i traffic-identifies CRC errors, address collisions, and timing violations.

Use Value: Provides real-time visibility into AS-i health without disrupting normal operation-reducing mean time to repair (MTTR) by 65% in multi-zone plants.

Equivalent & Alternatives

The following parts are listed as comparable options for similar AS-i interface applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ASI4U-G1-ST	SSOP28 package, −25 °C to +85 °C rating, same functional block diagram and pinout-lacks extended temperature range.	Targeted at ambient-controlled cabinet installations rather than high-heat motor drives or outdoor enclosures.	Select ASI4U-G1-ST only if operating temperature remains below +85 °C and SSOP28 footprint is preferred for space-constrained layouts.
ASI4U-F-G1-ST	SSOP28 package, −40 °C to +85 °C rating-adds extended low-temperature capability but omits +105 °C high-temp support.	Suitable for cold-storage facilities or outdoor winter deployments where low-temperature startup is critical.	Choose ASI4U-F-G1-ST when sub-zero ambient operation is required and high-temperature resilience is not needed.

Compared with ASI4U-G1-ST and ASI4U-F-G1-ST, the ASI4UE-E-G1-ST uniquely supports +105 °C operation in SOP28 packaging-making it the only option for thermally demanding industrial zones where ambient heat degrades SSOP28 reliability.

Availability

ASI4UE-E-G1-ST is available at Aetrix Electronics and suitable for AS-i master modules, safety-critical slave nodes, bus monitors, and high-temperature industrial automation requiring stable component supply across long production lifecycles.

Supply support for ASI4UE-E-G1-ST 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

Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and sensor signal conditioning ICs for industrial and communications infrastructure.

The ASI4U family was developed to replace legacy A²SI devices with enhanced functionality-including safety mode, IR-addressing, and integrated inductor-while maintaining backward compatibility for AS-i fieldbus upgrades.

FAQ

What is the maximum ambient temperature rating for the ASI4UE-E-G1-ST?

The ASI4UE-E-G1-ST is rated for continuous operation from −25 °C to +105 °C. This extended high-temperature capability is enabled by its SOP28 package and internal thermal protection circuitry, making it suitable for deployment near motors, drives, and hydraulic systems where cabinet temperatures exceed +85 °C. The ASI4UE-E-G1-ST maintains full AS-i V3.0 compliance across this entire range.

Does the ASI4UE-E-G1-ST support AS-i Safety Mode, and how is it activated?

Yes, the ASI4UE-E-G1-ST includes a dedicated AS-i Safety Mode that guarantees ≤40 ms fault reaction time-matching legacy A²SI performance. It is activated via EEPROM configuration using pins P0–P2 and PST, as defined in IDT's safety application note. When enabled, Safety Mode disables data input filters and synchronous I/O to ensure deterministic timing. The ASI4UE-E-G1-ST must be configured per IDT's safety guidelines to retain certification in existing safety modules.

Can the ASI4UE-E-G1-ST operate with both 8 MHz and 16 MHz crystals?

Yes, the ASI4UE-E-G1-ST supports automatic detection and operation with either 8 MHz or 16 MHz fundamental-mode crystals connected to OSC1/OSC2. No external configuration or EEPROM setting is required-the IC detects frequency at power-up and configures its internal timing blocks accordingly. This dual-frequency capability allows one ASI4UE-E-G1-ST design to serve multiple AS-i cycle timing requirements without hardware changes.

What is the purpose of the IRD pin on the ASI4UE-E-G1-ST?

The IRD pin on the ASI4UE-E-G1-ST implements the AS-i addressing channel, supporting both AC-current and CMOS input modes. It enables wireless node commissioning and parameter loading using handheld programmers-eliminating the need for physical programming connectors. In AC-current mode, IRD accepts modulated IR signals for address assignment; in CMOS mode, it accepts digital commands for EEPROM configuration. This feature is fully supported in the ASI4UE-E-G1-ST and documented in Section 4.3 of the datasheet.

How does the ASI4UE-E-G1-ST handle AS-i bus power delivery?

The ASI4UE-E-G1-ST integrates an on-chip electronic inductor capable of delivering 55 mA to the AS-i bus through UIN/UOUT pins-replacing external coil components. It regulates bus voltage and provides overcurrent and thermal protection. The ASI4UE-E-G1-ST also generates a regulated 5 V output (UOUT) for powering external logic or sensors, eliminating the need for a separate LDO in many AS-i node designs. This integrated power architecture reduces bill-of-materials cost and improves system reliability.

ASI4UE-E-G1-ST Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 28-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Applications:: Actuator Sensor Interface

Interface:: AS-i

Voltage - Supply:: 16V ~ 33.1V

Supplier Device Package:: 28-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

ASI4UE-E-G1-ST FAQ

1.How can I place an order for ASI4UE-E-G1-ST through Aetrix?

Please submit a Request for Quotation (RFQ) for ASI4UE-E-G1-ST 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 ASI4UE-E-G1-ST reliable?

The price and inventory of ASI4UE-E-G1-ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASI4UE-E-G1-ST is usually 5 days.

3.What payment methods are accepted for ASI4UE-E-G1-ST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASI4UE-E-G1-ST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ASI4UE-E-G1-ST?

ASI4UE-E-G1-ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ASI4UE-E-G1-ST 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 ASI4UE-E-G1-ST?

For technical support, including ASI4UE-E-G1-ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASI4UE-E-G1-ST requirements.

6.How does Aetrix verify that ASI4UE-E-G1-ST is sourced from the original manufacturer or authorized distributors?

All ASI4UE-E-G1-ST 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 ASI4UE-E-G1-ST meets industry standards.

7.What is the process for return or replacement of ASI4UE-E-G1-ST?

All ASI4UE-E-G1-ST units undergo pre-shipment inspection (PSI). If there is an issue with ASI4UE-E-G1-ST, 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 ASI4UE-E-G1-ST part is unused and in its original packaging.

Return procedure for ASI4UE-E-G1-ST:

1.Submit a request within 90 days.

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

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