Renesas SAP5SD-B-G1-R

Overview

SAP5SD-B-G1-R from Integrated Device Technology is a universal AS-Interface (AS-i) transceiver IC compliant with AS-Interface Complete Specification V3.0, functioning as physical-layer interface for master or slave nodes in two-wire bus systems. It delivers 55mA current drive via on-chip electronic inductor, supports 5.33/16MHz crystal frequencies with auto-detection, and operates across -25°C to +85°C in harsh industrial environments.

For engineers reviewing the SAP5SD-B-G1-R datasheet, SAP5SD-B-G1-R pinout, SAP5SD-B-G1-R application, or SAP5SD-B-G1-R equivalent, this device enables AS-i safety-critical slave modules, master modules, and repeaters with programmable mode selection, integrated safety code generation (SAP5S variant), and dual LED status indication per V3.0 requirements.

Technical Context

The SAP5SD-B-G1-R implements full AS-i physical layer functions including bidirectional data transmission over unshielded two-wire cable, simultaneous power delivery (16–34V DC), and protocol handling for standard and safety modes. Its internal PLL synchronizes to AS-i bus timing, while clock and communication watchdogs enforce system security.

It features configurable I/O ports (P[3:0], D[3:0]), dedicated control terminals (DSTBn, PSTBn, PFAULT), and dual LED drivers (LED1, LED2) supporting all V3.0 status indication modes. EEPROM stores configuration data including ID_Code_Extension_1 with write protection.

Key Specifications

Pinout & Package

SAP5SD-B-G1-R is housed in a SOP16 (300 mil) package with 16-pin surface-mount footprint, optimized for compact AS-i node designs requiring minimal PCB area.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ASI4U and SAP51D-B-G1-R, the SAP5SD-B-G1-R uniquely integrates AS-i Safety Mode with on-chip cryptographic engine and user-programmable EEPROM, making it the only option among the three qualified for SIL2-certified safety subsystems without external co-processors.

Availability

SAP5SD-B-G1-R is available at Aetrix Electronics and suitable for AS-i master modules, AS-i safety modules, and industrial repeater designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant tape-and-reel packaging.

Supply support for SAP5SD-B-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 industrial, communications, and computing markets.

The SAP5 product line was designed specifically for AS-Interface physical layer implementation in industrial automation, delivering integrated power, data, and safety functions in a single IC for simplified node design.

FAQ

What is the primary function of the SAP5SD-B-G1-R in an AS-i network?

The SAP5SD-B-G1-R serves as the physical-layer transceiver and protocol handler for AS-Interface networks. It extracts power from the two-wire bus, drives the AS-i signal, manages data exchange between master and slave devices, and supports programmable operation modes including Standard Slave, Master, and Safety Mode. Its role is foundational to reliable, low-cost sensor/actuator connectivity in industrial settings.

Does the SAP5SD-B-G1-R support AS-i Safety Mode, and what does that entail?

Yes, the SAP5SD-B-G1-R supports AS-i Safety Mode - a certified function enabled only in the SAP5S variant family. This mode incorporates an on-chip safety code generator that produces cryptographic checksums for safety-related telegrams, ensuring deterministic response times (<10ms) and integrity verification per AS-Interface V3.0 Safety Profile. The SAP5SD-B-G1-R implements this capability fully.

What crystal frequencies does the SAP5SD-B-G1-R support, and how is selection handled?

The SAP5SD-B-G1-R supports both 5.33MHz and 16MHz fundamental-mode crystals. Frequency selection is automatic at power-up: the device detects the connected crystal and configures its internal PLL accordingly. No external configuration or firmware intervention is required - this simplifies design and enables hardware reuse across different timing architectures.

How does the SAP5SD-B-G1-R handle power delivery and regulation for external circuitry?

The SAP5SD-B-G1-R derives power directly from the AS-i bus (16–34V DC on LTGP/LTGN) and provides two regulated outputs: UOUT delivers up to 55mA at 5V for external logic, while U5R supplies a stable 5V reference for internal analog blocks. Both outputs are internally generated with no external components required, enabling self-powered node designs.

Is the SAP5SD-B-G1-R pin-compatible with earlier AS-i ICs like the SAP4.1 (AS2702)?

Yes, the SAP5SD-B-G1-R is function and pin compatible with the SAP4.1 (AS2702) as explicitly stated in the datasheet. This allows drop-in replacement in existing designs using SOP16 packages, preserving PCB layout, firmware interfaces, and external circuitry while upgrading to V3.0 compliance, enhanced EMC performance, and safety mode capability.