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

Renesas SAP51D-B-G1-T

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

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Part No.:: SAP51D-B-G1-T

Manufacturer:: Renesas

Category:: Specialized

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: SAP51D-B-G1-T.pdf

Description:: SOP / 16 / 300MIL G1 - TUBE

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Product details

Overview

SAP51D-B-G1-T from Integrated Device Technology is a universal AS-Interface (AS-i) physical layer IC compliant with AS-Interface Complete Specification V3.0, functioning as slave/master interface to the two-wire unshielded bus. It delivers 55mA electronic inductor current, supports 5.33/16MHz crystal frequencies via auto-detection, and operates across -25°C to +85°C in SOP16 package. Used in industrial sensor/actuator interconnection where power and data share one cable.

For engineers reviewing the SAP51D-B-G1-T datasheet, SAP51D-B-G1-T pinout, SAP51D-B-G1-T application, or SAP51D-B-G1-T equivalent, this page provides verified technical context, pin-level design meaning, real-world AS-i system roles, and validated alternative options for master/slave node implementation.

Technical Context

The SAP51D-B-G1-T implements full AS-i V3.0 physical layer functionality including integrated electronic inductor (55mA drive), burst-protected receiver/transmitter, and dual LED status outputs. Its internal EEPROM stores configuration data for Standard Slave Mode or Master Mode operation - Safety Mode is exclusive to SAP5S variants.

It features clock and communication watchdogs, thermal protection, and automatic crystal frequency detection (5.33/16MHz). The device uses dedicated parameter port (P[3:0], PSTBn) and data port (D[3:0], DSTBn) with configurable I/O timing, pre-processing, and synchronous data I/O mode support.

Key Specifications

Parameter	Value and Actual Design Meaning
AS-i Compliance	Fully compliant with AS-Interface Complete Specification V3.0 - ensures interoperability with certified AS-i masters, slaves, and safety devices.
Operating Temp	-25°C to +85°C - qualified for industrial environments without external thermal management.
Crystal Support	5.33 MHz or 16 MHz with auto-detection - eliminates manual configuration and enables flexible timing source selection.
Electronic Inductor	55 mA output current at UOUT - powers AS-i bus directly without external inductor, reducing BOM count and board space.
Digital I/O Drive	10 mA sink capability on D[3:0]/DSTBn and P[3:0]/PSTBn - sufficient to drive standard logic inputs and discrete control signals.
EEPROM Storage	Internal non-volatile memory for user configuration, firmware, and operational mode settings - enables field reprogramming via handheld or USB programmer.
LED Outputs	LED1 and LED2 support all V3.0 status indication modes - provides visual diagnostics for node state, error, and communication activity.

Pinout & Package

SAP51D-B-G1-T is housed in a 16-pin SOP (300 mil) surface-mount package per JEDEC MS-012AC, with 1.27 mm pitch and 10.3 mm × 7.5 mm body dimensions.

Pin/Terminal	Circuit Role	Design Meaning
LTGP / LTGN	AS-i Bus Interface Terminals	Connect directly to two-wire AS-i cable; LTGP carries DC power + data, LTGN is return; rated for 16–34 VDC and pulse-tolerant up to 50 V.
UOUT	Regulated Output Voltage	Provides stabilized voltage (≈VLTGP – 1.2 V) to power external logic; capable of sourcing 55 mA - replaces external DC-DC converter in slave designs.
U5R	5 V Regulator Output	Delivers regulated 5 V for internal logic and optional external circuitry; load-dependent dropout behavior defined in datasheet Table 5.1.
P[3:0] / PSTBn	Parameter Port	4-bit bidirectional port with strobe; used for mode configuration, watchdog control, and EEPROM programming during initialization.
D[3:0] / DSTBn	Data Port	4-bit bidirectional data path with strobe; transfers I/O data between AS-i bus and local controller; supports delay/synchronous modes per configuration.
OSC1 / OSC2	Crystal Oscillator Inputs	Accepts fundamental-mode quartz crystals (5.33 or 16 MHz); internal oscillator circuit eliminates need for external capacitors in most layouts.
LED1 / LED2	Status Indicator Outputs	Open-drain drivers compatible with AS-i V3.0 LED signaling protocol; drive external LEDs for fault, ready, and communication status.
PFAULT	Fault Input	Active-low input monitoring external fault conditions (e.g., overtemperature, short-circuit); triggers internal fault response and status reporting.

Key Features

Feature	Design Value
Universal AS-i Node Role	Configurable as Standard Slave or Master Mode (not Safety Mode) - enables reuse across different node types without hardware change.
Integrated Electronic Inductor	55 mA UOUT current drive - eliminates discrete inductor and associated EMI filtering components in AS-i slave power supply design.
V3.0 Status LED Support	Dual open-drain LED1/LED2 outputs - implement full AS-i V3.0 visual status protocol (e.g., blinking patterns for address conflict, timeout, or safe state).
Crystal Auto-Detection	Automatic recognition of 5.33 MHz or 16 MHz crystal - removes configuration jumpers or software setup steps during production or field deployment.
Communication Watchdog	Hardware-enforced timeout on AS-i telegram reception - prevents hung states and ensures deterministic recovery in noisy industrial environments.

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: SAP51D-B-G1-T serves as physical layer interface, converting 4-bit parallel I/O into AS-i telegrams while powering the sensor via UOUT. Use Value: Reduces wiring complexity by carrying both power and data over one unshielded cable, cutting installation time and cost versus discrete I/O systems.	Use Scenario: Building a compact AS-i master for PLC integration in food & beverage processing lines. IC Role / Device Role / Timing Role: SAP51D-B-G1-T acts as master PHY, generating AS-i telegrams, managing timing, and handling bus arbitration and error recovery. Use Value: Enables small-footprint master design with no external oscillator components and built-in thermal/fault protection for high-uptime operation.
Industrial Repeater Node	Modular I/O Terminal Block
Use Scenario: Extending AS-i network reach beyond 100 m in automotive assembly plants with long conveyor lines. IC Role / Device Role / Timing Role: SAP51D-B-G1-T operates in repeater mode to regenerate and retransmit AS-i signals, maintaining signal integrity across extended distances. Use Value: Eliminates need for separate repeater ICs or gateways; single-chip solution preserves AS-i timing budget and reduces latency jitter.	Use Scenario: Designing DIN-rail mountable I/O terminals supporting mixed sensor/actuator connections in HVAC control panels. IC Role / Device Role / Timing Role: SAP51D-B-G1-T provides standardized AS-i interface, EEPROM-based node addressing, and LED status feedback for each terminal unit. Use Value: Simplifies commissioning with plug-and-play node identification and visual diagnostics, reducing field service time by >30%.

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: SAP51D-B-G1-T serves as physical layer interface, converting 4-bit parallel I/O into AS-i telegrams while powering the sensor via UOUT.

Use Value: Reduces wiring complexity by carrying both power and data over one unshielded cable, cutting installation time and cost versus discrete I/O systems.

Use Scenario: Building a compact AS-i master for PLC integration in food & beverage processing lines.

IC Role / Device Role / Timing Role: SAP51D-B-G1-T acts as master PHY, generating AS-i telegrams, managing timing, and handling bus arbitration and error recovery.

Use Value: Enables small-footprint master design with no external oscillator components and built-in thermal/fault protection for high-uptime operation.

Industrial Repeater Node

Modular I/O Terminal Block

Use Scenario: Extending AS-i network reach beyond 100 m in automotive assembly plants with long conveyor lines.

IC Role / Device Role / Timing Role: SAP51D-B-G1-T operates in repeater mode to regenerate and retransmit AS-i signals, maintaining signal integrity across extended distances.

Use Value: Eliminates need for separate repeater ICs or gateways; single-chip solution preserves AS-i timing budget and reduces latency jitter.

Use Scenario: Designing DIN-rail mountable I/O terminals supporting mixed sensor/actuator connections in HVAC control panels.

IC Role / Device Role / Timing Role: SAP51D-B-G1-T provides standardized AS-i interface, EEPROM-based node addressing, and LED status feedback for each terminal unit.

Use Value: Simplifies commissioning with plug-and-play node identification and visual diagnostics, reducing field service time by >30%.

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 transceiver with integrated microcontroller core; supports only slave mode; no master/repeater capability.	Limited to fixed-function slave nodes; lacks programmable EEPROM and dual-mode flexibility of SAP51D-B-G1-T.	Select ASI4U only when cost-sensitive, low-complexity slave-only applications require minimal external components and no field reconfiguration.
SAP51D-A-G1-T	Same silicon, SOP20 package (20-pin) instead of SOP16; identical electrical specs and feature set.	Requires larger PCB footprint and different layout; pinout differs - not pin-compatible with SAP51D-B-G1-T.	Choose SAP51D-A-G1-T only when additional routing space is available or when SOP20 is required for mechanical compatibility with existing carrier boards.

Compared with ASI4U and SAP51D-A-G1-T, the SAP51D-B-G1-T offers optimal balance of configurability, compactness, and functional completeness for general-purpose AS-i node design - especially where master capability, EEPROM programmability, and SOP16 form factor are required.

Availability

SAP51D-B-G1-T is available at Aetrix Electronics and suitable for industrial automation, factory floor I/O systems, and AS-i network infrastructure requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SAP51D-B-G1-T 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 designed to provide fully compliant, programmable AS-i physical layer ICs for robust, low-cost industrial fieldbus node implementation - targeting sensor/actuator connectivity in harsh environments.

FAQ

What is the primary function of the SAP51D-B-G1-T in an AS-i network?

The SAP51D-B-G1-T serves as the physical layer interface IC for AS-Interface networks, handling power delivery, data modulation/demodulation, and protocol timing. It functions as either a slave or master node, converting between local parallel I/O (via D[3:0] and P[3:0]) and AS-i bus signals on LTGP/LTGN. Its integrated electronic inductor and EEPROM make it self-contained for field-deployable node designs.

Does the SAP51D-B-G1-T support AS-i Safety Mode?

No, the SAP51D-B-G1-T does not support AS-i Safety Mode. That capability is exclusive to the SAP5S variant (e.g., SAP5SD-B-G1-T), which includes a dedicated safety code generator and safety-area EEPROM programming. The SAP51D-B-G1-T is limited to Standard Slave Mode and Master Mode operation per its datasheet specification and silicon revision history.

What crystal frequencies does the SAP51D-B-G1-T support, and how is selection handled?

The SAP51D-B-G1-T supports both 5.33 MHz and 16 MHz fundamental-mode quartz crystals. It performs automatic frequency detection at power-up using internal circuitry - no external configuration or software setting is required. This allows designers to select either crystal based on system timing requirements or legacy compatibility without modifying firmware or hardware.

Can the SAP51D-B-G1-T be used in a repeater application?

Yes, the SAP51D-B-G1-T supports repeater mode operation as defined in the AS-Interface Complete Specification V3.0. In this mode, it regenerates incoming AS-i telegrams and retransmits them with precise timing alignment, extending network reach beyond the standard 100 m limit. Pin assignments and timing behavior in repeater mode are detailed in datasheet Table 5.25 and Figure 5.9.

What are the key differences between SAP51D-B-G1-T and SAP51D-A-G1-T?

The SAP51D-B-G1-T and SAP51D-A-G1-T share identical electrical specifications, functionality, and silicon revision (D), but differ in package: SAP51D-B-G1-T uses SOP16 (300 mil), while SAP51D-A-G1-T uses SOP20 (300 mil). Their pinouts are not compatible - SOP16 omits four pins present in SOP20 (e.g., CDC, MAN, UART-related signals). Layout and footprint must be redesigned when switching between them.

SAP51D-B-G1-T Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: -

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Applications:: Actuator Sensor Interface

Interface:: AS-i

Voltage - Supply:: 16V ~ 34V

Supplier Device Package:: 16-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

SAP51D-B-G1-T FAQ

1.How can I place an order for SAP51D-B-G1-T through Aetrix?

Please submit a Request for Quotation (RFQ) for SAP51D-B-G1-T 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-B-G1-T reliable?

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

3.What payment methods are accepted for SAP51D-B-G1-T?

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

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SAP51D-B-G1-T?

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

Once your SAP51D-B-G1-T 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-B-G1-T?

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

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

All SAP51D-B-G1-T 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-B-G1-T meets industry standards.

7.What is the process for return or replacement of SAP51D-B-G1-T?

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

Return procedure for SAP51D-B-G1-T:

1.Submit a request within 90 days.

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

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