SC18IS600IPW/S8HP

Controllers Overview

The SC18IS600IPW/S8HP is an NXP bridge IC that interfaces a host SPI master to I2C-bus slave devices. It operates as an I2C master-transmitter or receiver, handling protocol and timing. The device supports SPI Mode 3 at speeds up to 1.2 Mbit/s and I2C speeds up to 400 kbit/s. It features a 96-byte transmit buffer and a 96-byte receive buffer. Operating voltage ranges from 2.4 V to 3.6 V. It includes four programmable GPIO pins, two quasi-bidirectional I/O pins, and 5 V tolerant I/Os. An internal oscillator provides clocking, and a power-down mode with WAKEUP pin support ensures low power consumption.

Controllers Feature Summary

• Acts as a bridge between SPI hosts and I2C-bus slaves, managing all bus-specific sequences and arbitration.
• Provides configurable general-purpose input/output pins with multiple drive modes including push-pull and open-drain.
• Supports low-power operation via a dedicated power-down mode activated by specific command sequences.
• Includes hardware interrupt output to signal transaction completion or error conditions to the host.

Controllers Applications

• Enabling SPI-based microcontrollers to communicate with legacy I2C sensors or peripherals.
• Expanding I2C bus capacity in systems where the primary controller lacks sufficient I2C interfaces.
• Facilitating data acquisition from I2C devices in industrial environments requiring 5 V tolerance on control lines.

Controllers Procurement Notes

Verify component authenticity through official NXP channels or authorized distributors. Confirm the /S8 suffix indicates the specific package variant and check for any discontinuation notices regarding this ordering option. Ensure the operating temperature range meets system requirements before integration.

Controllers Selection Notes

Select this component when an SPI master must interface with I2C slaves without software bit-banging. Verify that the required I2C speed does not exceed 400 kbit/s and that the SPI clock frequency remains within the specified limits. Consider the available GPIO count if additional control signals are needed beyond the bridge function.

Controllers Part Context

This part belongs to the SC18IS600 family of protocol bridge controllers. It specifically converts SPI commands into I2C transactions. The /S8 suffix denotes the TSSOP16 package configuration. It is distinct from UART-to-I2C bridges like the SC18IM7xx series.

Controllers Replacement Considerations

The SC18IS606PW is documented as a functional replacement offering larger buffers and different GPIO counts. Verify pin compatibility and register mapping differences before substitution. No other direct substitutes are confirmed in the provided documentation.

Controllers FAQ

How is the I2C clock frequency determined?

The I2C clock frequency is set via the I2CClk register and depends on the internal oscillator frequency, typically calculated using the formula provided in the datasheet based on the register value.

What happens if the least significant bit of the I2C address is ignored?

The SC18IS600 ignores the LSB of the slave address during write operations, ensuring the transaction proceeds as a write regardless of whether the LSB is set to 0 or 1.

Can the GPIO pins be used while the device is in power-down mode?

No, in power-down mode the internal oscillator stops and the device does not respond to SPI messages. The WAKEUP/IO4 pin must be pulled LOW to exit this state before normal GPIO operation resumes.