SC18IS603IPW,128

Controllers Overview

The SC18IS603IPW,128 is an I²C-bus to SPI bridge IC manufactured by NXP Semiconductors. It enables a microcontroller with an I²C interface to communicate directly with SPI devices. The device operates as an I²C slave and an SPI master, handling all protocol and timing sequences. Unlike the SC18IS602 variants, the SC18IS603 requires an external clock source on the CLKIN pin, supporting frequencies up to 18 MHz. This allows for higher SPI data rates of up to 4 Mbit/s. It features a 200-byte data buffer, four programmable I/O pins, and an active LOW interrupt output. The operating supply voltage ranges from 2.4 V to 3.6 V.

Controllers Feature Summary

• Acts as a bridge between I²C-bus masters and SPI slaves, controlling SPI protocol and timing.
• Requires an external clock input for operation, enabling SPI speeds up to 4 Mbit/s.
• Includes a 200-byte deep data buffer for storing transmitted and received information.
• Provides up to four slave select outputs that can be reconfigured as general-purpose I/O pins.

Controllers Applications

• Converting I²C-bus signals to SPI for interfacing with SPI peripherals.
• Adding additional SPI bus controllers to systems limited to I²C interfaces.

Controllers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure package and tape/reel specifications match system requirements. Confirm that the external clock source connected to the CLKIN pin meets the frequency and voltage level specifications defined in the datasheet. Ensure the I²C address configuration via A0-A2 pins aligns with the target system topology.

Controllers Selection Notes

Select this component when an external clock source is available or required for precise SPI timing control. Choose the SC18IS603 over the SC18IS602B if higher SPI baud rates up to 4 Mbit/s are necessary. Note that the SC18IS603 lacks the SS3 pin found in other variants, limiting the number of simultaneous slave selects to three. Verify compatibility with the host microcontroller's I²C voltage levels.

Controllers Part Context

The SC18IS603 is part of the SC18IS60x family of I²C-to-SPI bridges from NXP Semiconductors. It shares functional similarities with the SC18IS602 and SC18IS602B but differs primarily in its clocking mechanism. While the SC18IS602 series includes an internal oscillator, the SC18IS603 relies on an external clock input, which facilitates higher performance SPI operations. All variants share the same TSSOP16 package and core bridging functionality.

Controllers Replacement Considerations

The SC18IS602BIPW serves as a functional substitute within the same family. However, designers must account for the absence of the internal oscillator in the SC18IS603 and the requirement for an external clock signal. Additionally, the SC18IS603 does not support the SS2 function as a slave select, using it only as GPIO2, whereas the SC18IS602B supports SS2/GPIO2.