NXP Semiconductors SC18IS606PWJ

Overview

SC18IS606PWJ from NXP Semiconductors is an I²C-bus to SPI bridge IC that functions as an I²C target-transmitter/receiver and SPI controller, enabling microcontrollers with only I²C interfaces to communicate with SPI peripherals. It operates with 1.71 V to 3.6 V supply, supports up to 400 kHz I²C and 1.875 MHz SPI data rates, and integrates a 1024-byte buffer for seamless protocol translation in industrial sensor hubs and embedded control systems.

For engineers reviewing the SC18IS606PWJ datasheet, SC18IS606PWJ pinout, SC18IS606PWJ application, or SC18IS606PWJ equivalent, this page delivers verified electrical specs, TSSOP16 package mapping, GPIO reconfiguration capability, interrupt-driven operation, and functional alternatives validated against NXP's official documentation Rev. 1.1 (27 May 2026).

Technical Context

The SC18IS606PWJ implements a dedicated hardware bridge architecture: its I²C interface strictly operates as a target (not controller), using clock stretching to manage internal processing latency; the SPI side acts as a full master with programmable mode (0–3), polarity (CPOL), phase (CPHA), and frequency (58–1875 kHz) via Function ID F0h register writes.

It features three configurable CS outputs (CS0–CS2), each independently assignable as SPI chip select or GPIO with push-pull/open-drain/input-only modes via F6h/F7h commands; all GPIO states are latched and readable through F5h+F0h read-buffer sequence, while internal oscillator eliminates external clock requirements.

Key Specifications

Pinout & Package

SC18IS606PWJ is housed in a 16-pin TSSOP (SOT403-1) package with 4.4 mm body width and 0.65 mm lead pitch. Pin 1 is located in Quadrant 1 per tape orientation specification.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C-to-SPI bridge applications.

Compared with SC18IS606PWJ, SC18IS602B offers legacy compatibility but sacrifices voltage flexibility, temperature range, and buffer depth; MCP23017-E/SP provides GPIO expansion but lacks integrated SPI master logic, making it unsuitable for true I²C-to-SPI translation tasks requiring deterministic timing and hardware CS control.

Availability

SC18IS606PWJ is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, and medical point-of-care devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for SC18IS606PWJ 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with design centers across Europe, Asia, and North America.

The SC18IS606PWJ belongs to NXP's interface bridge product line, engineered specifically to simplify heterogeneous bus integration in resource-constrained embedded systems where MCU I²C ports must drive SPI peripherals without firmware overhead.

FAQ

What is the maximum I²C clock frequency supported by SC18IS606PWJ?

The SC18IS606PWJ supports I²C-bus operation up to 400 kHz, compliant with Fast-mode I²C specifications. This allows high-speed communication with I²C masters while maintaining compatibility with standard pull-up resistor configurations and noise margins. The SC18IS606PWJ uses clock stretching to ensure internal processing completes before acknowledging subsequent bytes, preserving data integrity at full speed.

Does SC18IS606PWJ require an external crystal or clock source?

No, SC18IS606PWJ does not require an external crystal or clock source. It incorporates an internal oscillator that generates all necessary timing signals for both I²C and SPI interfaces. This eliminates BOM cost and PCB area associated with external timing components, simplifying design for compact and cost-sensitive applications such as portable medical devices and smart meters.

How many SPI chip select outputs does SC18IS606PWJ provide, and can they be used as GPIOs?

SC18IS606PWJ provides three SPI chip select outputs (CS0, CS1, CS2), each configurable as either active LOW chip select or general-purpose I/O via F6h (enable), F7h (mode), and F4h/F5h (read/write) commands. This dual-role capability allows dynamic reassignment without hardware changes-enabling flexible peripheral management in systems where SPI device count varies across product variants.

What is the function of the INT pin on SC18IS606PWJ?

The INT pin on SC18IS606PWJ is an active LOW open-drain interrupt output that asserts after completion of any SPI transaction (read or write). It signals the I²C master that data is ready for retrieval from the internal buffer or that a command has executed. The SC18IS606PWJ supports automatic clearing via F1h command or manual polling, providing flexibility for interrupt-driven or polling-based system architectures.

Can SC18IS606PWJ operate with a 1.8 V supply voltage?

Yes, SC18IS606PWJ supports operation from 1.71 V to 3.6 V, making it fully compatible with 1.8 V systems. Its static and dynamic characteristics-including 400 kHz I²C, 1.875 MHz SPI, and 2000 V HBM ESD rating-are guaranteed across this entire voltage range. This ensures reliable interoperability with modern ultra-low-power MCUs and sensors powered from 1.8 V rails in battery-operated edge devices.