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NXP Semiconductors SC18IS603IPW,112
- Part No.:
- SC18IS603IPW,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SC18IS603IPW,112.pdf
- Description:
- IC BRIDGE I2C/SPI 16-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,649
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Product details
Overview
SC18IS603IPW,112 from NXP Semiconductors is an I²C-to-SPI bridge IC operating as an I²C-bus slave and SPI master, enabling microcontrollers with only I²C interfaces to communicate with SPI peripherals. It supports I²C up to 400 kHz, SPI up to 4 Mbit/s, features a 200-byte data buffer, four programmable slave select outputs (SS0–SS2 + CLKIN), and requires an external clock input (0–18 MHz) for operation. It is used in embedded systems where space-constrained I²C hosts must interface with legacy or high-speed SPI sensors, EEPROMs, or ADCs.
For engineers reviewing the SC18IS603IPW,112 datasheet, SC18IS603IPW,112 pinout, SC18IS603IPW,112 application, or SC18IS603IPW,112 equivalent, key selection considerations include its external-clock dependency (vs. internal oscillator in SC18IS602), absence of SS3 and SS2 functionality, TSSOP16 package constraints, GPIO reconfiguration capability via F6h/F7h commands, and 2.4–3.6 V supply compliance.
Technical Context
The SC18IS603IPW,112 implements a deterministic bridge architecture: it accepts I²C commands (e.g., Function IDs 01h–0Fh for SPI transfer, F0h for SPI mode/frequency configuration, F6h/F7h for GPIO control), buffers data in a 200-byte FIFO, then executes full-duplex SPI transactions using externally supplied CLKIN. Its interrupt output (INT) signals SPI completion, and RESET enables hardware initialization.
Unlike the SC18IS602/602B, this device lacks an internal oscillator and relies entirely on CLKIN (Pin 13) for timing - enabling SPI rates up to fosc/4 (max 4.5 MHz at 18 MHz CLKIN). It supports all four SPI modes (CPOL/CPHA configurable), but SS2 is GPIO-only and SS3 is absent - confirmed by pin description Table 2 and block diagram Fig 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| I²C Interface Speed | Up to 400 kHz - supports standard/fast-mode I²C masters without arbitration loss or clock stretching issues. |
| SPI Master Speed | Up to 4 Mbit/s - achieved only with external CLKIN ≥16 MHz; actual rate = fCLKIN/4, fCLKIN/16, fCLKIN/64, or fCLKIN/128 per F0h register. |
| Data Buffer Depth | 200 bytes - enables burst transfers of large SPI payloads (e.g., EEPROM page writes) without host intervention between bytes. |
| Supply Voltage Range | 2.4 V to 3.6 V - compatible with 3.3 V logic domains; not 5 V tolerant in quasi-bidirectional GPIO mode. |
| GPIO Flexibility | Four pins (SS0–SS2 + A0–A2 address inputs) configurable as GPIO with push-pull, open-drain, quasi-bidirectional, or input-only modes via F6h/F7h commands. |
| ESD Robustness | 2000 V HBM, 200 V MM, 1000 V CDM - meets industrial-level ESD immunity requirements for board-level integration. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial environments; storage up to +150 °C. |
Pinout & Package
SC18IS603IPW,112 is housed in a 16-pin TSSOP (SOT403-1) package: plastic thin shrink small outline, 4.4 mm body width, 0.65 mm lead pitch. Pin 1 is SS0/GPIO0; Pin 13 is CLKIN (not SS3); Pin 10 is SS2/GPIO2 (GPIO-only, no slave select function).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SS0/GPIO0) | SPI slave select 0 or general-purpose I/O | Active-low output for SPI device selection; reconfigurable as GPIO with software-controlled drive strength and direction. |
| 2 (SS1/GPIO1) | SPI slave select 1 or general-purpose I/O | Second independent slave select; identical GPIO flexibility to SS0; enables dual-SPI-peripheral control without external logic. |
| 3 (RESET) | Hardware reset input | Active-low asynchronous reset; internal 10–30 kΩ pull-up ensures defined state on power-up; glitch-filtered (50 ns). |
| 4 (VSS) | Ground reference | Primary return path for all digital and I/O circuits; must be low-impedance connection to system ground plane. |
| 5 (MISO) | SPI master-in-slave-out input | Receives serial data from SPI slaves during full-duplex transfers; sampled synchronously to SPICLK edge per configured mode. |
| 6 (MOSI) | SPI master-out-slave-in output | Drives serial data to SPI slaves; output timing aligned to SPICLK; supports mode-dependent sampling edges. |
| 7 (SDA) | I²C bidirectional data line | Open-drain I²C data bus interface; requires external pull-up; supports multi-master arbitration and clock synchronization. |
| 8 (SCL) | I²C clock input | Open-drain I²C clock bus interface; driven by I²C master; SC18IS603IPW,112 holds SCL low only during internal processing (clock stretching). |
| 9 (INT) | Interrupt output | Active-low open-drain signal asserted after SPI transaction completion; requires external pull-up; cleared via F1h command or auto-cleared on next I²C access. |
| 10 (SS2/GPIO2) | GPIO-only terminal (no SS2 function) | Not usable as slave select; exclusively configurable as GPIO with full F7h mode control (quasi-bidirectional, push-pull, etc.). |
| 11 (SPICLK) | SPI clock output | Generated by SC18IS603IPW,112 to synchronize MOSI/MISO transfers; frequency derived from CLKIN and F0h register settings. |
| 12 (VDD) | Power supply input | 2.4–3.6 V supply; decoupling capacitor (100 nF) required near pin for noise suppression and transient current delivery. |
| 13 (CLKIN) | External clock input | 0–18 MHz CMOS-level clock source; replaces internal oscillator; determines maximum SPI speed and I²C inter-byte timing. |
| 14 (A0), 15 (A1), 16 (A2) | I²C slave address inputs | Three hardwired address bits latched at RESET; enable up to eight SC18IS603IPW,112 devices on one I²C bus (7-bit address 0x50–0x57). |
Key Features
| Feature | Design Value |
|---|---|
| Configurable SPI modes (0–3) | Software-selectable CPOL/CPHA via F0h register - ensures interoperability with diverse SPI peripherals (e.g., flash, DACs, sensors) without hardware redesign. |
| Four independent slave select outputs | SS0–SS2 + dedicated CLKIN pin - eliminates need for external decoder logic when managing multiple SPI slaves; SS2 is GPIO-only but retains routing utility. |
| 200-byte FIFO buffer | Reduces I²C bus occupancy during SPI bursts - allows host MCU to issue one I²C write and process results later, improving real-time responsiveness. |
| GPIO reconfiguration (F6h/F7h) | Per-pin drive mode control (quasi-bidirectional, push-pull, open-drain, input-only) - enables flexible signal routing, level translation, and peripheral handshaking without external components. |
| Low-power idle mode (F2h) | Reduces supply current to ≤6 mA (at 18 MHz CLKIN) - extends battery life in portable I²C-hosted systems during SPI inactivity periods. |
| Interrupt-driven SPI completion | INT pin assertion eliminates polling overhead - allows host MCU to enter sleep mode and wake only upon SPI transaction finish, optimizing power/performance trade-off. |
Applications
| Industrial Sensor Hub | Legacy EEPROM Integration |
|---|---|
|
Use Scenario: An ARM Cortex-M0 microcontroller with only I²C peripherals must read temperature/humidity data from multiple SPI-based sensors (e.g., BME280, LIS3DH) in a factory automation node. IC Role / Device Role / Timing Role: SC18IS603IPW,112 acts as protocol translator: receives I²C commands from MCU, initiates SPI reads/writes to sensors, and returns results via I²C; CLKIN synchronized to system clock for deterministic latency. Use Value: Enables use of high-performance SPI sensors without MCU hardware upgrade; 200-byte buffer handles multi-register sensor reads in single I²C transaction. |
Use Scenario: A medical device controller (I²C-only) needs to store calibration data in a 2 MB SPI Flash memory, requiring reliable page programming and status polling. IC Role / Device Role / Timing Role: SC18IS603IPW,112 serves as SPI master: translates I²C write commands into SPI flash opcodes (e.g., Write Enable, Page Program), manages WIP bit polling via MISO, and reports completion via INT. Use Value: Eliminates need for discrete level shifters or FPGA glue logic; 4 Mbit/s SPI speed reduces firmware update time versus bit-banged I²C-to-SPI solutions. |
| Modular PLC I/O Expansion | IoT Edge Gateway Bridging |
|
Use Scenario: A programmable logic controller uses I²C to configure distributed I/O modules; each module contains SPI ADCs/DACs requiring precise timing and channel synchronization. IC Role / Device Role / Timing Role: SC18IS603IPW,112 provides isolated SPI control per module: SS0–SS2 select individual ADCs, SPICLK derived from stable CLKIN ensures sample timing accuracy across channels. Use Value: Guarantees deterministic SPI timing (±5 ns clock edges) critical for synchronized sampling; GPIO pins (A0–A2) used for module addressing simplifies backplane wiring. |
Use Scenario: A Wi-Fi-enabled IoT gateway (I²C host) aggregates data from SPI-connected environmental sensors (CO₂, VOC) and forwards to cloud via MQTT. IC Role / Device Role / Timing Role: SC18IS603IPW,112 bridges sensor interface: converts periodic I²C polling requests into SPI reads, buffers results, and asserts INT to trigger data packaging and transmission. Use Value: Reduces MCU active time by 65% vs. polled I²C-to-SPI emulation; low-power idle mode extends battery life in solar-powered gateways. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar I²C-to-SPI bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC18IS602IPW | Includes internal 7.3728 MHz oscillator; no CLKIN pin; max SPI speed 1.8 Mbit/s; SS2 available as slave select. | Better for space-constrained designs where external clock routing is impractical; lower SPI bandwidth acceptable. | Select SC18IS602IPW if eliminating clock source simplifies layout and 1.8 Mbit/s suffices; avoid if >2 Mbit/s SPI or SS2-as-GPIO is required. |
| MAX7327ATL+ | I²C I/O expander with SPI passthrough; no native SPI master logic; requires host MCU to manage SPI timing and framing. | Suitable only when MCU firmware can handle low-level SPI protocol; lacks 200-byte buffer and autonomous SPI execution. | Choose MAX7327ATL+ only for simple GPIO extension with incidental SPI access; not a functional replacement for SC18IS603IPW,112's autonomous bridging. |
Compared with SC18IS602IPW and MAX7327ATL+, the SC18IS603IPW,112 uniquely delivers high-speed (4 Mbit/s) autonomous SPI mastering with external clock precision, making it optimal for latency-sensitive or bandwidth-intensive I²C-hosted systems where deterministic timing and minimal MCU intervention are critical.
Availability
SC18IS603IPW,112 is available at Aetrix Electronics and suitable for industrial sensor hubs, modular PLC I/O expansion, and IoT edge gateway bridging requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SC18IS603IPW,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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with expertise in interface, power management, and secure MCU technologies.
The SC18IS603IPW,112 belongs to NXP's I²C-to-SPI bridge product line, designed specifically to extend I²C-based microcontroller ecosystems into high-performance SPI peripheral domains while minimizing firmware complexity and PCB footprint.
FAQ
What clock source does SC18IS603IPW,112 require, and why is it different from SC18IS602?
SC18IS603IPW,112 requires an external clock input (CLKIN, Pin 13) ranging from 0 Hz to 18 MHz - it has no internal oscillator. This design enables higher SPI speeds (up to 4 Mbit/s) and precise timing control unattainable with the SC18IS602IPW's fixed 7.3728 MHz internal RC oscillator (max 1.8 Mbit/s). The external clock also allows synchronization to system timing domains, reducing jitter in time-critical applications.
Can SC18IS603IPW,112 use SS2 as a slave select signal?
No. Per the official NXP datasheet (Section 6.1 and Table 2), SC18IS603IPW,112 does not support SS2 as a slave select output. Pin 10 (SS2/GPIO2) is GPIO-only and must be configured via F6h/F7h commands for general-purpose use. Only SS0 and SS1 are functional slave select outputs; SS3 is absent entirely in SC18IS603IPW,112.
How does the 200-byte data buffer in SC18IS603IPW,112 improve system performance?
The 200-byte buffer allows SC18IS603IPW,112 to accept full SPI transaction payloads (e.g., EEPROM page writes, sensor register dumps) over I²C in one burst, then execute them autonomously on the SPI bus. This eliminates host MCU polling or repeated I²C handshaking, reducing bus contention and freeing the MCU for other tasks - especially valuable in real-time or power-constrained systems.
What GPIO configurations are supported by SC18IS603IPW,112, and how are they controlled?
SC18IS603IPW,112 supports four GPIO modes per pin (quasi-bidirectional, push-pull, open-drain, input-only) via the F7h "GPIO Configuration" command. Mode selection is done using two bits per pin in the F7h register (e.g., SS0.1/SS0.0). GPIO direction and state are set via F4h (write) and F5h (read), with F6h enabling/disabling GPIO functionality on each pin - all operations executed over I²C without MCU SPI firmware involvement.
Is SC18IS603IPW,112 compatible with 5 V I²C or SPI systems?
SC18IS603IPW,112 operates strictly at 2.4–3.6 V and is not 5 V tolerant on any pin except when configured as input-only GPIO (per Section 7.1.11.3). Applying 5 V to quasi-bidirectional or push-pull GPIO pins causes excessive current flow from pin to VDD, increasing power consumption and risking damage. Level-shifting circuitry is mandatory for interfacing with 5 V buses.
SC18IS603IPW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Programmable:
- Not Verified
- Protocol:
- I2C
- Function:
- Controller
- Interface:
- SPI
- Standards:
- -
- Voltage - Supply:
- 2.4V ~ 3.6V
- Current - Supply:
- 11mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-TSSOP
- Grade:
- -
- Qualification:
- -
SC18IS603IPW,112 FAQ
1.How can I place an order for SC18IS603IPW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC18IS603IPW,112 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SC18IS603IPW,112 reliable?
The price and inventory of SC18IS603IPW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC18IS603IPW,112 is usually 5 days.
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Once your SC18IS603IPW,112 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SC18IS603IPW,112?
For technical support, including SC18IS603IPW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC18IS603IPW,112 requirements.
6.How does Aetrix verify that SC18IS603IPW,112 is sourced from the original manufacturer or authorized distributors?
All SC18IS603IPW,112 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SC18IS603IPW,112 meets industry standards.
7.What is the process for return or replacement of SC18IS603IPW,112?
All SC18IS603IPW,112 units undergo pre-shipment inspection (PSI). If there is an issue with SC18IS603IPW,112, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SC18IS603IPW,112 part is unused and in its original packaging.
Return procedure for SC18IS603IPW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC18IS603IPW,112 Tags
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PTN5150AHXMP
NXP Semiconductors
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USB3740B-AI9-TR
Microchip Technology
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USB3740B-AI2-TR
Microchip Technology
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FUSB340TMX
onsemi
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FUSB302BMPX
onsemi
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DP83826IRHBR
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MCP2518FDT-E/QBB
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FT260Q-R
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