NXP Semiconductors SC18IS600IPW,112

Overview

SC18IS600IPW,112 from NXP Semiconductors is an SPI-to-I²C bridge IC that functions as a slave on the SPI bus and a single-master controller on the I²C bus. It operates from 2.4 V to 3.6 V, supports SPI Mode 3 up to 1.2 Mbit/s, delivers I²C-bus speeds up to 400 kbit/s, and integrates 96-byte transmit/receive buffers for reliable protocol translation in embedded microcontroller systems interfacing with I²C sensors or EEPROMs.

For engineers reviewing the SC18IS600IPW,112 datasheet, SC18IS600IPW,112 pinout, SC18IS600IPW,112 application, or SC18IS600IPW,112 equivalent, key selection considerations include its TSSOP16 package, 5 V tolerant I/O pins, programmable GPIO configuration (quasi-bidirectional/push-pull/open-drain/input-only), power-down mode with WAKEUP/IO4 control, and active-low interrupt signaling for real-time transaction status reporting.

Technical Context

The SC18IS600IPW,112 implements a dedicated hardware I²C-bus controller with full protocol handling-including arbitration, START/STOP generation, ACK/NACK management, and clock stretching-offloading timing-critical tasks from the host MCU. Its internal RC oscillator runs at 7.3728 MHz (±1% at 25 °C), enabling precise I²C clock rate configuration via the I2CClk register (e.g., 369 kHz to 7.2 kHz).

It uses a dual-buffer architecture: a 96-byte transmit buffer accepts SPI commands before initiating I²C transactions, while a 96-byte receive buffer stores incoming I²C data until read via SPI. Transaction status is reported through the 4-bit I2CStat register (e.g., 0xF0 = success, 0xF1 = slave address NACK), with interrupt assertion on INT pin upon completion or error.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1), 4.4 mm body width, 0.65 mm pitch, surface-mount compatible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PCA9306DC,118 and MAX7357ATL+, the SC18IS600IPW,112 uniquely combines SPI slave interface, autonomous I²C master controller, and programmable GPIOs in a single TSSOP16 package - making it the only viable option for resource-constrained MCUs requiring offloaded, hardware-accelerated I²C communication.

Availability

SC18IS600IPW,112 is available at Aetrix Electronics and suitable for industrial sensor hubs, smart energy metering, medical wearables, and automotive body control modules requiring stable component supply across extended production lifecycles.

Supply support for SC18IS600IPW,112 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 over 50 years of analog and mixed-signal design heritage.

The SC18IS600IPW,112 belongs to NXP's interface bridge product line, engineered specifically to simplify SPI-host integration with I²C peripherals in space- and power-constrained embedded systems.

FAQ

What is the maximum SPI clock frequency supported by the SC18IS600IPW,112?

The SC18IS600IPW,112 supports SPI Mode 3 up to 1.2 Mbit/s, corresponding to a maximum SCLK frequency of 600 kHz (since each bit requires two SCLK edges). This limit is enforced by internal timing constraints and ensures reliable sampling of MOSI/MISO signals across the full industrial temperature range (−40 °C to +85 °C). Exceeding this rate may cause command corruption or buffer overflow.

How does the SC18IS600IPW,112 handle I²C bus arbitration when multiple masters are present?

The SC18IS600IPW,112 implements full hardware arbitration per the I²C specification: it monitors SDA during transmission and relinquishes bus control if it detects a mismatch between its output and the bus level, then waits for bus free condition before retrying. This occurs automatically without host intervention, ensuring robust operation in multi-master I²C systems where the SC18IS600IPW,112 coexists with other controllers.

Can the SC18IS600IPW,112 operate with a 5 V I²C bus while powered from 3.3 V?

Yes - all I/O pins of the SC18IS600IPW,112 are 5 V tolerant, including SDA and SCL. When interfacing with a 5 V I²C bus, external 5 V pull-up resistors must be used on SDA/SCL lines. The SC18IS600IPW,112 will correctly drive and sense 5 V logic levels while operating from a 2.4 V–3.6 V VDD supply, eliminating need for external level shifters.

What happens to the GPIO pins during SC18IS600IPW,112 power-down mode?

During power-down mode (entered via 0x30/0x5A/0xA5 SPI command), all GPIO pins except WAKEUP/IO4 enter high-impedance state with internal pull-ups disabled. WAKEUP/IO4 remains active as an input to detect the wake-up pulse. Upon exit, GPIO0–GPIO3 and IO5 revert to their pre-power-down configuration states stored in IOConfig and IOState registers, ensuring seamless resumption of I/O functionality.

Is the internal oscillator of the SC18IS600IPW,112 factory-trimmed for accuracy?

Yes - the SC18IS600IPW,112's internal RC oscillator is factory-trimmed to 7.3728 MHz with ±1% accuracy at 25 °C. This precision enables reliable I²C clock generation across the industrial temperature range without external components. The I2CClk register allows fine-grained adjustment of resulting I²C frequencies (e.g., 369 kHz minimum to 7.2 kHz maximum), maintaining timing compliance under varying conditions.