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NXP Semiconductors SC16IS750IPW,128
- Part No.:
- SC16IS750IPW,128
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SC16IS750IPW,128.pdf
- Description:
- IC UART I2C/SPI 24-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,910
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Product details
Overview
SC16IS750IPW,128 from NXP Semiconductors is a single-channel UART IC with dual I²C-bus/SPI interface, 64-byte TX/RX FIFOs, IrDA SIR support up to 115.2 kbit/s, and 8 programmable GPIOs - enabling protocol bridging between microcontrollers and RS-232/RS-485 peripherals in space-constrained industrial gateways.
For engineers reviewing the SC16IS750IPW,128 datasheet, SC16IS750IPW,128 pinout, SC16IS750IPW,128 application, or SC16IS750IPW,128 equivalent, this device delivers verified hardware/software flow control, automatic RS-485 direction management, 5 Mbit/s baud rate capability, and 16C450 register compatibility for rapid firmware porting.
Technical Context
The SC16IS750IPW,128 implements a full-duplex UART core with independent transmitter and receiver FIFOs (64 bytes each), programmable trigger levels via TLR/FCR, and bidirectional I²C (400 kbit/s) or SPI (4 Mbit/s) host interface - all operating from 2.5 V or 3.3 V supply. Its register set mirrors the 16C450 architecture, ensuring drop-in software compatibility across legacy platforms.
Hardware flow control uses auto RTS/CTS with configurable halt/resume thresholds in the TCR register, while IrDA SIR encoding/decoding is integrated and enabled via dedicated control bits. The 8 GPIO pins (GPIO0–GPIO7) are individually configurable as inputs/outputs with active pull-ups and support modem signal mapping (DSR/DTR/CD/RI) via IOControl register bit 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | Selectable I²C-bus (400 kbit/s) or SPI (4 Mbit/s); I²C/SPI pin selects mode at power-up |
| UART Data Rate | Up to 5 Mbit/s in 16× clock mode; supports standard and fractional baud rates via 16-bit divisor |
| FIFO Depth | 64-byte transmit and receive FIFOs with programmable interrupt trigger levels (1–60 bytes) |
| IrDA Support | Built-in encoder/decoder for SIR at 115.2 kbit/s; no external transceiver required |
| GPIO Pins | 8 programmable I/Os (GPIO0–GPIO7); configurable as general-purpose or modem signals (DSR/DTR/CD/RI) |
| Power Supply | 2.5 V or 3.3 V operation; sleep current <30 μA at 3.3 V enables battery-powered designs |
| Temperature Range | Industrial grade: –40 °C to +95 °C; qualified for factory automation and embedded control |
Pinout & Package
TSSOP24 package (SOT355-1): plastic thin shrink small outline, 24 leads, 4.4 mm body width, lead pitch 0.65 mm - optimized for high-density PCB layouts in portable and industrial equipment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (XTAL2) | Crystal oscillator output | Drives external crystal connected between XTAL1–XTAL2; forms internal timing reference |
| 2 (XTAL1) | Crystal input / external clock input | Accepts crystal (1–25 MHz) or external clock source; determines UART baud rate accuracy |
| 4 (RESET) | Hardware reset input (active LOW) | Synchronously resets all registers and disables TX/RX; requires ≥100 ns pulse width |
| 3 (RX), 24 (RTS), 23 (TX), 22 (CTS) | UART serial interface | Full-duplex RS-232/RS-485 compatible signaling; RTS controls RS-485 driver direction |
| 14 (IRQ) | Open-drain interrupt output | Active LOW; indicates FIFO status, line errors, modem changes, or Xoff detection per IIR priority |
| 9 (I²C/SPI), 10 (CS/A0), 11 (SI/A1), 12 (SO), 13 (SCL/SCLK), 15 (SDA) | Configurable host interface | I²C mode when I²C/SPI = HIGH (A0/A1 set address); SPI mode when I²C/SPI = LOW (CS active LOW) |
| 15–18, 20–23 (GPIO0–GPIO3, GPIO4/DSR, GPIO5/DTR, GPIO6/CD, GPIO7/RI) | Programmable I/O terminals | 8 bidirectional pins with active pull-ups; mapped to modem signals via IOControl register bit 1 |
Key Features
| Feature | Design Value |
|---|---|
| Auto RS-485 direction control | RTS pin directly drives RS-485 transceiver DE/RE lines - eliminates external logic and reduces BOM count |
| Backward-compatible register map | Fully matches 16C450 layout; allows reuse of existing UART drivers and OS abstractions without modification |
| Independent TX/RX enable control | Transmitter and receiver can be disabled separately - enables low-power receive-only or transmit-only modes |
| Programmable character format | Supports 5–8 data bits, even/odd/no parity, 1/1.5/2 stop bits - accommodates legacy industrial protocols |
| Internal loopback mode | Verifies UART functionality without external wiring; TX output internally routed to RX input for self-test |
| Stale-data timeout interrupt | Triggers IRQ when RX FIFO contains unread data > 4 character times - prevents buffer lockup in idle systems |
Applications
| Industrial PLC Communication Gateway | Portable Barcode Scanner Interface |
|---|---|
Use Scenario: Connects ARM-based controller to legacy RS-485 field devices (sensors, actuators) over compact PCB. IC Role / Device Role / Timing Role: UART bridge translating SPI commands from MCU into RS-485 frames with automatic direction control and hardware flow control. Use Value: Eliminates need for discrete level shifters and direction logic; 64-byte FIFO absorbs burst traffic during PLC scan cycles. |
Use Scenario: Enables Bluetooth/Wi-Fi MCU in handheld scanner to communicate with RS-232 barcode engine. IC Role / Device Role / Timing Role: Protocol converter handling asynchronous serial framing, IrDA SIR handshake, and GPIO-controlled trigger signals. Use Value: Reduces host CPU overhead via auto Xon/Xoff flow control and interrupt-driven FIFO management. |
| Smart Energy Meter Serial Port Expander | Medical Device RS-232 Diagnostic Interface |
Use Scenario: Adds isolated UART channel to meter SoC for firmware updates and metrology diagnostics via optical interface. IC Role / Device Role / Timing Role: Low-power UART with sleep current <30 μA; wakes on IRQ to service host command requests. Use Value: Meets IEC 62056-21 compliance for secure, low-energy serial communication in battery-backed meters. |
Use Scenario: Interfaces patient monitor MCU to external PC for real-time waveform logging and calibration. IC Role / Device Role / Timing Role: High-reliability UART with line-break detection, parity error reporting, and 5 Mbit/s throughput. Use Value: Ensures deterministic latency and error-free transmission of time-critical biomedical data streams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS760IPW | Supports SPI up to 15 Mbit/s and IrDA SIR up to 1.152 Mbit/s; otherwise functionally identical | Required for high-speed SPI hosts or IrDA MIR-compliant systems; not needed for 4 Mbit/s SPI or 115.2 kbit/s SIR | Choose SC16IS760IPW only if higher SPI bandwidth or faster IrDA is mandatory; SC16IS750IPW,128 remains optimal for cost-sensitive industrial designs. |
| MAX3107ETJ+ | 3.3 V only; supports SPI only (no I²C); 128-byte FIFOs; no built-in IrDA; different register map | Used where larger FIFO depth or SPI-only interface suffices; lacks I²C option and IrDA integration | Select MAX3107ETJ+ when maximum FIFO buffering is critical and IrDA/I²C are unnecessary; SC16IS750IPW,128 provides broader interface flexibility and lower system-level component count. |
Compared with SC16IS760IPW and MAX3107ETJ+, the SC16IS750IPW,128 uniquely balances I²C/SPI dual-interface support, integrated IrDA SIR, 16C450 compatibility, and industrial temperature range - making it the most direct fit for RS-232/RS-485 expansion in resource-constrained embedded systems.
Availability
SC16IS750IPW,128 is available at Aetrix Electronics and suitable for industrial PLC gateways, portable diagnostic tools, smart energy meters, and medical device serial interfaces requiring stable component supply and long-term manufacturability.
Supply support for SC16IS750IPW,128 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 - delivering high-integration, low-power, and ASIL/IEC 61508-qualified components.
The SC16IS750IPW,128 belongs to NXP's SC16IS7xx UART bridge family, designed specifically to simplify serial peripheral integration in microcontroller-based systems with minimal firmware overhead and board space.
FAQ
What interface protocols does the SC16IS750IPW,128 support?
The SC16IS750IPW,128 supports both I²C-bus (up to 400 kbit/s) and SPI (up to 4 Mbit/s) host interfaces - selected at power-up via the I²C/SPI pin. It does not support UART-to-UART bridging or USB. The SC16IS750IPW,128 integrates a full-duplex UART with RS-232/RS-485 signal-level compatibility through external transceivers.
Does the SC16IS750IPW,128 include hardware flow control?
Yes, the SC16IS750IPW,128 supports auto hardware flow control using RTS and CTS signals - configurable independently via the Enhanced Feature Register (EFR[7:6]). Auto RTS asserts when RX FIFO space exceeds the halt threshold; auto CTS halts transmission when CTS goes HIGH before the middle of the last stop bit. This eliminates overrun errors without CPU intervention.
Can the SC16IS750IPW,128 operate with a 2.5 V supply?
Yes, the SC16IS750IPW,128 is fully specified for 2.5 V and 3.3 V operation. Internal regulators and I/O buffers are designed for both voltages - with recommended pull-up resistors of 1.5 kΩ for 2.5 V and 1 kΩ for 3.3 V on the IRQ pin. All timing parameters and functional behavior remain guaranteed across both supply rails.
How many GPIO pins does the SC16IS750IPW,128 provide?
The SC16IS750IPW,128 provides eight programmable GPIO pins (GPIO0–GPIO7), each configurable as input or output with active pull-ups. GPIO4–GPIO7 can alternatively serve as modem control signals (DSR/DTR/CD/RI) via the IOControl register. These pins are not present on the SC16IS740 variant.
Is the SC16IS750IPW,128 pin-compatible with the SC16IS740IPW?
No, the SC16IS750IPW,128 is not pin-compatible with the SC16IS740IPW. The SC16IS740IPW uses a TSSOP16 package with 16 pins and no GPIOs, while the SC16IS750IPW,128 uses a TSSOP24 package with 24 pins and 8 GPIOs. Their pin mappings, package footprints, and register sets differ - though both share 16C450 register compatibility at the software level.
SC16IS750IPW,128 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Programmable:
- Not Verified
- Protocol:
- RS232, RS485
- Function:
- Controller
- Interface:
- I2C, SPI, UART
- Standards:
- -
- Voltage - Supply:
- 2.5V, 3.3V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 95°C
- Supplier Device Package:
- 24-TSSOP
- Grade:
- -
- Qualification:
- -
SC16IS750IPW,128 FAQ
1.How can I place an order for SC16IS750IPW,128 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16IS750IPW,128 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 SC16IS750IPW,128 reliable?
The price and inventory of SC16IS750IPW,128 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16IS750IPW,128 is usually 5 days.
3.What payment methods are accepted for SC16IS750IPW,128?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16IS750IPW,128 transactions.
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4.How is shipping managed for SC16IS750IPW,128?
SC16IS750IPW,128 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16IS750IPW,128 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 SC16IS750IPW,128?
For technical support, including SC16IS750IPW,128 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16IS750IPW,128 requirements.
6.How does Aetrix verify that SC16IS750IPW,128 is sourced from the original manufacturer or authorized distributors?
All SC16IS750IPW,128 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 SC16IS750IPW,128 meets industry standards.
7.What is the process for return or replacement of SC16IS750IPW,128?
All SC16IS750IPW,128 units undergo pre-shipment inspection (PSI). If there is an issue with SC16IS750IPW,128, 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 SC16IS750IPW,128 part is unused and in its original packaging.
Return procedure for SC16IS750IPW,128:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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