ASI4UE-G1-SR - AS-Interface v3.0 Universal AS-i IC | Renesas
MPN: ASI4UE-G1-SR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.9 | $89.00 |
| 100 | $7.55 | $755.00 |
| 500 | $6.4 | $3,200.00 |
| 1,000 | $5.45 | $5,450.00 |
ASI4UE-G1-SR Overview
An AS-i (Actuator Sensor Interface) IC is a specialized mixed-signal controller used in industrial automation to replace parallel wiring between sensors/actuators and a PLC. The bus category hierarchy is: AS-i IC -> industrial fieldbus transceiver -> sensor/actuator interface -> industrial communication IC -> semiconductor. Compared with conventional point-to-point wiring, AS-i reduces cabling cost and weight, supports automatic slave addressing, and enables diagnostic data collection from each node. The ASI4UE-G1-SR's on-chip EEPROM stores all slave configuration parameters, allowing rapid programming via stationary or handheld programming devices.
Key features include an integrated differential physical layer for the AS-i bus, an embedded Manchester-coded protocol engine, an internal DC-DC converter that derives a regulated logic supply from the bus voltage, four configurable digital I/O lines with input-monitoring capability, and a dedicated safety option that guarantees short response times for safety-related events. The IC supports up to 4 standard slaves per AS-i master and can be cascaded for larger networks.
Architecturally, the ASI4UE-G1-SR combines a high-voltage bus transceiver, a precision current source, an 8-bit microcontroller-compatible interface, and the safety-state machine in one CMOS die. This level of integration eliminates the need for an external ASIC or microcontroller in simple slave implementations, lowering BOM cost and PCB area. The device operates over the -25 °C to +85 °C industrial temperature range.
Typical applications include binary sensor/actuator modules in factory automation, AS-i safety I/O blocks, conveyor-system edge nodes, packaging machinery, and AS-i stack-light modules. The device is function- and pin-compatible with the legacy A²SI IC family, allowing drop-in migration of existing AS-i slave designs.
When designing with the ASI4UE-G1-SR, observe the recommended PCB layout guidelines from the datasheet: keep the bus traces short and symmetric, place the bus-decoupling capacitor within 5 mm of the IC, and provide adequate creepage/clearance for the 24 V industrial environment. Always validate safety-related designs against the AS-i Safety Specification.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate AS-i slave and master integration.
Drop-in alternatives for ASI4UE-G1-SR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ASI4UE-G1-SR (same form factor and footprint) — differing in Operating Temperature, Package, Programming Interface.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ASI4UE-G1-ST
✅ Drop-In📋 Reference alternative (not in catalog)
ASI4UE-E-G1-SR
✅ Drop-In📋 Reference alternative (not in catalog)
ASI4UE-E-G1-ST
✅ Drop-In✓ In Stock
$7.4 / Unit
View Datasheet →ASI4UE-G1-SR Specifications
| Product Type | AS-Interface (AS-i) IC |
| Compliance Standard | AS-Interface Complete Specification v3.0 |
| Maximum Slaves per Master | 31 (standard) |
| Cycle Time | 5 ms (maximum, full network) |
| Data Encoding | Manchester (APM/PPM) |
| Integrated EEPROM | Yes (slave configuration storage) |
| Digital I/O Lines | 4 configurable |
| Safety Option | Yes (short response time for safety events) |
| Pin/Package Compatibility | Pin- and function-compatible with A²SI IC |
| Package | SOIC-28 (300 mil) |
| Mounting Type | Surface Mount |
| Operating Temperature | -25 °C to +85 °C (industrial) |
| Process Technology | CMOS (mixed-signal, high-voltage) |
| Programming Interface | Stationary or handheld programming device |
| RoHS Status | Compliant |
| Lead-Free | Yes |
ASI4UE-G1-SR soic-28 (300 mil) Pin Configuration Guide
Pin configuration for ASI4UE-G1-SR (soic-28 (300 mil) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ASI4UE-G1-SR.
Refer to the datasheet for full pin configuration.
Typical Applications
ASI4UE-G1-SR is suitable for 6 applications: Binary Sensor/Actuator AS-i Slave Modules, AS-i Safety I/O Blocks (Safety-at-Work), Conveyor and Material-Handling Edge Nodes, Packaging Machinery I/O Blocks, AS-i Stack-Light and Tower-Lamp Modules, Automotive Body-in-White AS-i Cells.
Binary Sensor/Actuator AS-i Slave Modules
The ASI4UE-G1-SR is the core IC inside IP67-rated binary sensor modules that hang on an AS-i two-wire yellow cable in factory automation cells. Its integrated DC-DC converter derives the 3.3 V logic rail directly from the 24 V bus, eliminating an external supply and reducing BOM cost. The four configurable digital I/O lines directly drive standard PNP sensor inputs and small solenoid outputs, and the on-chip EEPROM stores slave address and configuration so that no external microcontroller is required for simple 4I/4O blocks. Cycle-time latency stays below 5 ms for a 31-slave network, ensuring deterministic response for high-speed conveyor photoeyes and proximity switches typical of automotive body-in-white and packaging lines.
Recommended
AS-i Safety I/O Blocks (Safety-at-Work)
The ASI4UE-G1-SR's integrated AS-i safety option delivers the short, deterministic response times required by AS-i Safety-at-Work (SaW) profiles. Inside a safety I/O block, the IC monitors emergency-stop loops, light curtains, and guard-door switches, encoding their state into the AS-i safety telegram with response times typically under 5 ms. Pin/function compatibility with the legacy A²SI IC allows safety-block OEMs to migrate designs without re-qualifying the PCB footprint. The internal EEPROM stores the safety code tables, and the on-chip Manchester codec handles the redundant transmission required by the AS-Interface Complete Specification v3.0 safety addendum used in machine-tool and robotic-cell guarding.
Recommended
Conveyor and Material-Handling Edge Nodes
Distribution-centre conveyor systems rely on the ASI4UE-G1-SR to provide low-cost, addressable I/O at every motor-roller, diverter, and photoeye station along the line. Because the AS-i bus carries both 24 V power and data on a single unshielded two-wire cable, installation time drops dramatically compared with parallel wiring — a key reason AS-i dominates brown-field conveyor retrofits. The ASI4UE-G1-SR's 5 ms cycle-time and 31-slave capacity allow thousands of I/O points per master gateway without latency issues. The integrated Manchester codec and bus-current source eliminate the need for an external PHY, and the wide industrial temperature range (-25 °C to +85 °C) covers ambient temperatures inside unventilated conveyor-side enclosures.
Recommended
Packaging Machinery I/O Blocks
Food, beverage, and pharmaceutical packaging machines use the ASI4UE-G1-SR in distributed I/O blocks that mount directly on the machine frame, fed by a single yellow AS-i cable routed through the machine harness. This eliminates the bulky multi-conductor cables that previously ran back to a central PLC cabinet, simplifying clean-down and sanitation. The IC's four configurable I/O channels are perfect for valve-manifold control, proximity-sensor feedback, and stack-light status, while the on-chip EEPROM allows each block to be re-addressed in seconds via a handheld programmer when a packaging format change is required. AS-i Safety-at-Work support means the same harness can carry both standard and e-stop signals.
Recommended
AS-i Stack-Light and Tower-Lamp Modules
Industrial stack lights and tower lamps are increasingly networked via AS-i to provide per-machine status back to the line SCADA. The ASI4UE-G1-SR drives the multi-segment LED or incandescent stack directly through its four I/O lines, with the bus providing both the logic supply and a small amount of current for low-power LEDs. Because AS-i addressing is automatic, replacing a stack-light module on the line requires no manual addressing — the slave EEPROM stores the address across power cycles. The IC's small SOIC-28 footprint and integrated DC-DC converter fit inside the 30 mm or 50 mm tower base, while its -25 °C to +85 °C range covers the wide thermal envelope of factory floors.
Recommended
Automotive Body-in-White AS-i Cells
Body-in-white robotic welding cells use AS-i as the fieldbus for gripper, clamp, and weld-tip-detection sensors because the two-wire yellow cable simplifies robot dress-packs and reduces cable fatigue. The ASI4UE-G1-SR sits inside each weld-cell I/O block, where its Manchester-coded AS-i physical layer rejects the heavy EMI generated by resistance-welding currents. The safety option enables emergency-stop chaining across the cell without additional safety relays. With the IC's on-chip DC-DC converter, the same two-wire AS-i cable delivers both 24 V for the block's outputs and regulated 3.3 V/5 V for its logic, eliminating a separate power harness. Pin compatibility with the legacy A²SI IC lets Tier-1 automotive suppliers re-use qualified PCB footprints.
Recommended
Recommended Products Summary
Engineering reference data for ASI4UE-G1-SR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ASI4UE-G1-ST | ASI4UE-E-G1-SR | ASI4UE-E-G1-ST |
|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | SOIC-28 (300 mil) | SOIC-28 - same | SOIC-28 - same | SOIC-28 - same |
| AS-i Specification | Complete Spec v3.0 | Complete Spec v3.0 | Complete Spec v3.0 | Complete Spec v3.0 |
| Pin/Function Compatibility | A²SI compatible | A²SI compatible | A²SI compatible | A²SI compatible |
| AS-i Safety Option | Yes | Yes | Yes | Yes |
| Integrated EEPROM | Yes | Yes | Yes | Yes |
| Configurable Digital I/O | 4 lines | 4 lines | 4 lines | 4 lines |
| Packaging Form | Tape & Reel | Tube | Tape & Reel | Tube |
| Screening Grade | Standard industrial | Standard industrial | Extended (-E-) | Extended (-E-) |
| RoHS Compliance | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated AS-i Safety option with deterministic short response times (vs A²SI legacy IC)
- Pin- and function-compatible with A²SI for true drop-in migration (vs Third-party AS-i ICs)
- Modern CMOS process with integrated DC-DC converter (vs A²SI legacy IC)
- Extended-temperature (-E-) variant available for harsh environments (vs ASI4UE-G1-SR (standard grade))
Design Notes
Place the AS-i bus-decoupling capacitor within 5 mm of the ASI4UE-G1-SR's AP/AN pins and use short, symmetric bus traces to maintain the differential Manchester signal integrity required by the AS-Interface Complete Specification v3.0. Provide at least 8 mm creepage and clearance between the bus traces and any low-voltage logic traces to meet industrial 24 V pollution-degree-2 requirements. Tie the exposed pad (if present on the SOIC-28 variant) to the logic ground pour to reduce EMI.
The ASI4UE-G1-SR derives its internal 3.3 V logic rail from the AS-i bus through an on-chip DC-DC converter. Do not back-feed an external supply onto the logic-rail pin or the internal regulator may latch. For each slave, the bus must supply a minimum of 25 mA continuous current per the AS-i spec; oversize the bus-power supply accordingly when designing 31-slave networks to avoid under-voltage trips.
Do not confuse the ASI4UE-G1-SR with the legacy A²SI IC at the firmware level: although pin-compatible, the ASI4UE-G1-SR uses an extended EEPROM map and updated safety-option registers. Re-program the slave with the ASI4U firmware profile during commissioning. Also, when designing safety-rated blocks, validate the complete safety chain against the AS-i Safety Specification - the IC alone does not confer SIL classification without proper system-level redundancy and verification.
Route the four configurable digital I/O traces away from the AS-i differential bus pair, and add a guard ground on either side of the bus pair to suppress coupled noise from adjacent relay or solenoid drivers. Keep the EEPROM programming interface traces short and shield them with ground if the programming port is brought to an external connector, since ESD events on the programming pin during commissioning are a common failure mode for AS-i slaves.
Compliance Information
RoHS/REACH compliance confirmed by Renesas product page and the ETEI compliance comparison. AEC-Q100 not applicable (industrial AS-i is not an automotive-qualified line; the -E- suffix is industrial extended-screening, not AEC-Q100).
