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

Renesas SAP51D-A-G1-R

Name: SAP51D-A-G1-R
Brand: Renesas
SKU: SAP51D-A-G1-R
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SAP51D-A-G1-R

Manufacturer:: Renesas

Category:: Specialized

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: SAP51D-A-G1-R.pdf

Description:: IC INTERFACE SPECIALIZED V3.0

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SAP51D-A-G1-R from Integrated Device Technology is a universal AS-Interface (AS-i) transceiver IC compliant with AS-Interface Complete Specification V3.0, designed for physical-layer interface in master or slave nodes. It delivers 55mA electronic inductor current drive, supports 5.33/16MHz crystal frequencies via automatic detection, and operates across -25°C to +85°C. Used in industrial sensor/actuator interconnection over unshielded two-wire cable carrying both power and data.

For engineers reviewing the SAP51D-A-G1-R datasheet, SAP51D-A-G1-R pinout, SAP51D-A-G1-R application, or SAP51D-A-G1-R equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (Standard Slave, Master), and real-world AS-i system integration details - including EEPROM-programmable configuration, burst protection, and dual LED status indication per V3.0 requirements.

Technical Context

The SAP51D-A-G1-R implements a full AS-i physical layer with integrated receiver, transmitter, and electronic inductor - enabling direct connection to the AS-i bus (LTGP/LTGN) without external magnetics. Its internal oscillator supports auto-detection of 5.33MHz or 16MHz crystals, and its main state machine handles telegram encoding/decoding, timing synchronization, and safety-critical watchdogs (clock and communication).

Configuration is stored in on-chip EEPROM and programmable via UART or parameter port; it supports Standard Slave Mode and Master Mode (but not Safety Mode - exclusive to SAP5S variant). Pin functions are mode-dependent: P[3:0] and D[3:0] serve as configurable I/O ports, while DSTBn and PSTBn act as strobe inputs controlling data/parameter transfer timing.

Key Specifications

Parameter	Value and Actual Design Meaning
AS-i Compliance	Full compliance with AS-Interface Complete Specification V3.0 - ensures interoperability with certified masters, slaves, and repeaters in industrial networks.
Operating Temperature	-25°C to +85°C - qualified for deployment in harsh industrial environments without external thermal management.
Crystal Support	5.33 MHz or 16 MHz with automatic frequency detection - eliminates manual configuration and enables flexible clock source selection.
Electronic Inductor Drive	55 mA continuous sink capability at UOUT - powers AS-i bus directly from chip, removing need for external DC-DC or inductor.
Digital I/O Drive	10 mA max sink per D[3:0] and P[3:0] pin - sufficient for driving LEDs, optocouplers, or logic-level inputs in sensor/actuator interfaces.
EEPROM Capacity	Internal non-volatile memory for ID code, configuration, and firmware - enables field reprogramming via handheld or USB programmer without hardware change.
EMC Robustness	Burst protection circuitry and ESD tolerance (1500V HBM, 200V EDM) - sustains reliable operation in electrically noisy factory settings.

Pinout & Package

SAP51D-A-G1-R is housed in a RoHS-compliant SOP20 (300 mil) package with 20-pin surface-mount footprint and standard JEDEC outline dimensions (12.8 mm × 7.6 mm × 2.45 mm).

Pin/Terminal	Circuit Role	Design Meaning
LTGP / LTGN	AS-i Bus Interface Terminals	Direct connection points to two-wire AS-i bus; LTGP carries positive supply/data, LTGN is reference/return - withstands ±50V pulse per spec.
UOUT	Regulated Output Voltage	Provides stabilized voltage (typically ~12V) to external circuitry; supplies up to 55mA for auxiliary loads or level-shifting.
U5R	5V Regulated Output	On-chip 5V LDO output for internal logic and external microcontroller interface - eliminates need for separate 5V regulator.
D[3:0]	Data Port Outputs/Inputs	Four bidirectional digital I/O pins for sensor/actuator data exchange; direction controlled by IO_Code register and DSTBn strobe.
P[3:0]	Parameter Port Inputs/Outputs	Four configurable pins for address setting, mode selection, or diagnostics; sampled on rising edge of PSTBn.
DSTBn	Data Strobe Input (Active Low)	Edge-triggered control signal initiating read/write cycle on D[3:0]; synchronizes data transfer with AS-i telegram timing.
PSTBn	Parameter Strobe Input (Active Low)	Edge-triggered control signal latching values on P[3:0]; used during initialization and configuration phases.
LED1 / LED2	Status Indicator Outputs	Drive external LEDs per AS-i V3.0 status indication modes (e.g., "OK", "Error", "Addressing") - open-drain outputs with internal pull-up.
OSC1 / OSC2	Crystal Oscillator Terminals	Connects to external quartz crystal (5.33 or 16 MHz); internal oscillator circuit enables precise AS-i bit timing without external clock source.
PFAULT	Fault Detection Input	Monitors external fault condition (e.g., short-circuit, overtemperature); asserts internal fault flag and triggers protective shutdown if pulled low.

Key Features

Feature	Design Value
Universal AS-i Node Role	Configurable as Standard Slave or Master - single BOM part supports both endpoint and controller roles in AS-i topology.
Integrated Electronic Inductor	55 mA drive capability eliminates discrete inductor and reduces bill-of-materials cost and PCB area in AS-i slave modules.
V3.0 Status LED Support	Dual open-drain LED outputs implement all mandatory AS-i V3.0 status indication patterns - simplifies compliance testing and field diagnostics.
Auto-Detect Crystal Frequency	Hardware-based recognition of 5.33 MHz or 16 MHz crystal - removes software configuration step and prevents timing errors due to mismatched clock source.
On-Chip EEPROM Storage	Stores device address, mode configuration, and safety parameters - enables field updates without component replacement or soldering.
Burst & ESD Protection	Integrated circuitry withstands 50 V/50 µs pulses and 1500 V HBM - meets industrial immunity requirements without external TVS diodes.

Applications

AS-i Slave Module	AS-i Master Module
Use Scenario: Connecting binary sensors (e.g., limit switches, photoelectric sensors) to an AS-i network in packaging machinery. IC Role / Device Role / Timing Role: Physical layer transceiver handling AS-i bus signaling, power delivery, and data framing for up to 4 digital inputs. Use Value: Enables direct two-wire connection without external power supply or signal conditioning - reduces wiring cost by >40% vs. conventional 4–20 mA systems.	Use Scenario: Central controller in automotive assembly line AS-i subsystem managing 31 slave devices. IC Role / Device Role / Timing Role: Master node generating AS-i telegrams, managing addressing, and coordinating cyclic data exchange with slaves. Use Value: Integrates bus driver, oscillator, and protocol engine - eliminates need for FPGA or external microcontroller in compact master designs.
Industrial Repeater Node	Modular I/O Terminal
Use Scenario: Extending AS-i network reach beyond 100 m in steel mill conveyor control system. IC Role / Device Role / Timing Role: Signal regeneration and timing retiming unit that recovers, reshapes, and retransmits AS-i telegrams without protocol interpretation. Use Value: Doubles effective network length using same SOP20 footprint - avoids gateway complexity and latency of higher-layer protocols.	Use Scenario: DIN-rail mounted distributed I/O block with configurable input/output mapping for food processing PLC interface. IC Role / Device Role / Timing Role: Core physical interface enabling hot-swappable module identification and parameterized I/O direction via EEPROM-stored configuration. Use Value: Supports plug-and-play replacement with zero reconfiguration - reduces machine downtime during maintenance.

AS-i Slave Module

AS-i Master Module

Use Scenario: Connecting binary sensors (e.g., limit switches, photoelectric sensors) to an AS-i network in packaging machinery.

IC Role / Device Role / Timing Role: Physical layer transceiver handling AS-i bus signaling, power delivery, and data framing for up to 4 digital inputs.

Use Value: Enables direct two-wire connection without external power supply or signal conditioning - reduces wiring cost by >40% vs. conventional 4–20 mA systems.

Use Scenario: Central controller in automotive assembly line AS-i subsystem managing 31 slave devices.

IC Role / Device Role / Timing Role: Master node generating AS-i telegrams, managing addressing, and coordinating cyclic data exchange with slaves.

Use Value: Integrates bus driver, oscillator, and protocol engine - eliminates need for FPGA or external microcontroller in compact master designs.

Industrial Repeater Node

Modular I/O Terminal

Use Scenario: Extending AS-i network reach beyond 100 m in steel mill conveyor control system.

IC Role / Device Role / Timing Role: Signal regeneration and timing retiming unit that recovers, reshapes, and retransmits AS-i telegrams without protocol interpretation.

Use Value: Doubles effective network length using same SOP20 footprint - avoids gateway complexity and latency of higher-layer protocols.

Use Scenario: DIN-rail mounted distributed I/O block with configurable input/output mapping for food processing PLC interface.

IC Role / Device Role / Timing Role: Core physical interface enabling hot-swappable module identification and parameterized I/O direction via EEPROM-stored configuration.

Use Value: Supports plug-and-play replacement with zero reconfiguration - reduces machine downtime during maintenance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ASI4U	Single-chip AS-i master/slave with integrated microcontroller core; requires external crystal only - no EEPROM programming interface.	Targeted at embedded master applications requiring firmware customization; lacks dedicated parameter port strobes (PSTBn/DSTBn).	Select ASI4U when full programmability and local decision-making (e.g., pre-processing logic) are required alongside AS-i PHY.
SAP5SD-A-G1-R	Pin-compatible SOP20 variant with Safety Mode support and integrated safety code generator - adds cryptographic checksum generation for SIL2/PLd applications.	Required for safety-rated slave nodes (e.g., emergency stop circuits); SAP51D-A-G1-R cannot be upgraded to Safety Mode via firmware.	Choose SAP5SD-A-G1-R when functional safety certification (IEC 61508, ISO 13849) is mandated - SAP51D-A-G1-R is limited to standard automation.

Compared with ASI4U and SAP5SD-A-G1-R, the SAP51D-A-G1-R offers optimized cost and simplicity for non-safety AS-i endpoints and masters, with deterministic timing, minimal external components, and field-reprogrammable configuration - making it ideal for high-volume industrial I/O modules where safety certification is not required.

Availability

SAP51D-A-G1-R is available at Aetrix Electronics and suitable for AS-i slave modules, AS-i master controllers, and industrial repeater nodes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for SAP51D-A-G1-R 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, interface, and RF solutions for communications, computing, and industrial markets.

The SAP51/SAP5S product line was developed to provide fully compliant, programmable AS-i physical layer ICs for cost-sensitive industrial automation - enabling robust two-wire sensor/actuator connectivity without custom ASIC design.

FAQ

What is the primary function of the SAP51D-A-G1-R in an AS-i network?

The SAP51D-A-G1-R serves as the physical layer transceiver for AS-Interface networks, handling bus power delivery, data modulation/demodulation, and telegram timing. It functions as either a Standard Slave or Master node - interfacing directly with the two-wire AS-i bus (LTGP/LTGN), driving up to 55 mA, and supporting 5.33/16 MHz crystals. Unlike the SAP5S variant, SAP51D-A-G1-R does not support Safety Mode.

Does the SAP51D-A-G1-R support Safety Mode operation?

No, the SAP51D-A-G1-R does not support Safety Mode. That capability is exclusive to the SAP5S family (e.g., SAP5SD-A-G1-R), which includes an integrated safety code generator and cryptographic checksum engine for SIL2/PLd applications. The SAP51D-A-G1-R is specified only for Standard Slave and Master Modes per AS-Interface V3.0 - confirmed in the datasheet's "Assignment of Operational Modes" table and block diagram annotations.

What package type and pin count does the SAP51D-A-G1-R use?

The SAP51D-A-G1-R uses a SOP20 (300 mil) surface-mount package with 20 pins, as explicitly stated in the Ordering Information table and verified in Figure 7.1 (SOP20 Package Pin Assignment) and Table 7.1 (Package Pin List) of the official datasheet. Its dimensions are 12.8 mm × 7.6 mm × 2.45 mm, and it is RoHS-compliant with tape-and-reel packaging (1000 units/reel).

How is configuration stored and updated on the SAP51D-A-G1-R?

Configuration data - including device address, operational mode, and I/O mapping - is stored in on-chip EEPROM and programmed via UART or the parameter port (P[3:0]/PSTBn). The SAP51D-A-G1-R supports field updates using IDT's AS-Interface Programmer Kit USB or compatible handheld tools. EEPROM contents persist through power cycles and require no external memory - a key differentiator from microcontroller-based alternatives.

Can the SAP51D-A-G1-R operate with both 5.33 MHz and 16 MHz crystals?

Yes, the SAP51D-A-G1-R features automatic crystal frequency detection and supports both 5.33 MHz and 16 MHz quartz crystals on OSC1/OSC2, as documented in Table 2.3 and Section 5.12 of the datasheet. This hardware-level detection eliminates software configuration errors and ensures correct AS-i bit timing regardless of crystal choice - critical for interoperability across vendor ecosystems.

SAP51D-A-G1-R Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Actuator Sensor Interface

Interface:: AS-i

Voltage - Supply:: 16V ~ 34V

Supplier Device Package:: 20-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

SAP51D-A-G1-R FAQ

1.How can I place an order for SAP51D-A-G1-R through Aetrix?

Please submit a Request for Quotation (RFQ) for SAP51D-A-G1-R 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 SAP51D-A-G1-R reliable?

The price and inventory of SAP51D-A-G1-R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAP51D-A-G1-R is usually 5 days.

3.What payment methods are accepted for SAP51D-A-G1-R?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAP51D-A-G1-R transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SAP51D-A-G1-R?

SAP51D-A-G1-R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SAP51D-A-G1-R 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 SAP51D-A-G1-R?

For technical support, including SAP51D-A-G1-R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAP51D-A-G1-R requirements.

6.How does Aetrix verify that SAP51D-A-G1-R is sourced from the original manufacturer or authorized distributors?

All SAP51D-A-G1-R 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 SAP51D-A-G1-R meets industry standards.

7.What is the process for return or replacement of SAP51D-A-G1-R?

All SAP51D-A-G1-R units undergo pre-shipment inspection (PSI). If there is an issue with SAP51D-A-G1-R, 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 SAP51D-A-G1-R part is unused and in its original packaging.

Return procedure for SAP51D-A-G1-R:

1.Submit a request within 90 days.

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

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