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NXP Semiconductors SC16IS750IBS,157
- Part No.:
- SC16IS750IBS,157
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
SC16IS750IBS,157.pdf
- Description:
- IC UART 64BYTE 24HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
SC16IS750IBS,157 from NXP Semiconductors is a single-channel high-performance UART with I²C-bus or SPI slave interface, supporting up to 5 Mbit/s data rates, 64-byte TX/RX FIFOs, and 8 programmable GPIOs. It operates at 2.5 V or 3.3 V, features auto hardware/software flow control, automatic RS-485 direction control via RTS, and IrDA SIR support up to 115.2 kbit/s - ideal for industrial serial gateway and battery-powered edge node designs.
For engineers reviewing the SC16IS750IBS,157 datasheet, SC16IS750IBS,157 pinout, SC16IS750IBS,157 application, or SC16IS750IBS,157 equivalent, key selection considerations include its HVQFN24 package footprint, I²C/SPI interface select logic, GPIO multiplexing (DSR/DTR/CD/RI), sleep current <30 µA, and register compatibility with legacy 16C450 software stacks.
Technical Context
The SC16IS750IBS,157 implements a full-duplex UART core with backward-compatible 16C450 register mapping, enabling drop-in software porting. Its dual-interface architecture supports I²C-bus (up to 400 kbit/s, fast-mode) or SPI (up to 4 Mbit/s, Mode 0) as slave only, with dedicated I2C/SPI pin selection and separate address/control pins (A0/A1 for I²C, CS/SI/SO/SCLK for SPI).
Internally, it integrates independent 64-byte transmit and receive FIFOs with programmable trigger levels (via FCR/TLR), auto RTS/CTS hardware flow control using configurable halt/resume thresholds in TCR, and IrDA SIR encoder/decoder circuitry optimized for 115.2 kbit/s baseband operation - distinct from the SC16IS760's 1.152 Mbit/s capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | I²C-bus (400 kbit/s) or SPI (4 Mbit/s, Mode 0), slave-only; pin-selectable via I2C/SPI input |
| UART Data Rate | Up to 5 Mbit/s in 16× clock mode; enables high-speed RS-232/RS-485 bridging without CPU bottleneck |
| FIFO Depth | 64 bytes TX + 64 bytes RX with error status; reduces host interrupt load and improves burst data handling |
| GPIO Pins | 8 programmable I/Os (GPIO0–GPIO7), configurable as DSR/DTR/CD/RI or general-purpose digital I/O |
| Supply Voltage | 2.5 V or 3.3 V operation; supports mixed-voltage system integration with level-shifted I/O tolerance |
| Sleep Current | <30 µA at 3.3 V; enables ultra-low-power operation in battery-backed or energy-harvested nodes |
| Operating Temp | −40 °C to +95 °C industrial range; validated for factory automation and outdoor embedded deployments |
Pinout & Package
HVQFN24 package (SOT616-3): 4 mm × 4 mm × 0.85 mm body, 24-terminal no-lead construction with exposed thermal pad requiring PCB ground connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RESET | Hardware reset input | Active-low asynchronous reset; initializes registers and forces TX/RTS HIGH on deassertion |
| 2 XTAL1 | Clock input | Crystal or external clock source (1–25 MHz); forms oscillator with XTAL2 or accepts system clock directly |
| 3 XTAL2 | Clock output | Crystal oscillator feedback output; must be left unconnected when using external clock input |
| 4 VDD | Power supply | 2.5 V or 3.3 V main supply; decoupling capacitor required within 1 cm of pin |
| 5 I2C/SPI | Interface select | HIGH = I²C mode; LOW = SPI mode; determines function of A0/A1 (I²C) vs CS/SI/SO/SCLK (SPI) |
| 6 A0 / CS | I²C address bit / SPI chip select | In I²C mode: LSB of 7-bit slave address; in SPI mode: active-low chip select (Schmitt-triggered) |
| 7 A1 / SI | I²C address bit / SPI data in | In I²C mode: MSB of 7-bit slave address; in SPI mode: MOSI input for register access |
| 8 SCL / SCLK | I²C clock / SPI clock | Input clock for I²C (SCL) or SPI (SCLK); synchronous timing reference for all register transfers |
| 9 SDA | I²C data I/O | Open-drain bidirectional I²C bus line; must be pulled up externally (1 kΩ @ 3.3 V) |
| 10 IRQ | Interrupt output | Open-drain active-low interrupt signal; requires external pull-up; asserts on FIFO, modem, or error events |
| 11 GPIO0–GPIO3 | General-purpose I/O | Configurable as inputs/outputs via IOControl register; default as inputs after reset |
| 12–15 GPIO4/DSR–GPIO7/RI | Modem-status I/O or GPIO | Programmable as DSR/DTR/CD/RI pins or digital I/O; supports modem handshaking or custom control |
| 16 VSS | Ground | Digital ground; both corner VSS pins and center thermal pad must connect to PCB ground plane |
| 17–19 RX, TX, CTS | UART serial interface | RX: CMOS input; TX: CMOS output; CTS: active-low flow control input (affects TX when EFR[7] enabled) |
| 20–21 RTS, IRQ | UART control & interrupt | RTS: active-low output for hardware flow control or RS-485 driver enable; IRQ: shared interrupt output |
| 22–24 GPIO0–GPIO2 | Additional GPIO | Same functionality as GPIO0–GPIO3; all 8 GPIOs share common direction and interrupt-enable registers |
Key Features
| Feature | Design Value |
|---|---|
| 16C450 register compatibility | Enables direct reuse of legacy UART drivers and OS kernel modules without modification |
| Auto RTS/CTS hardware flow control | Eliminates RX FIFO overrun by dynamically asserting/deasserting RTS based on programmable trigger levels |
| IrDA SIR encoder/decoder | On-chip baseband modulation/demodulation for 115.2 kbit/s infrared communication without external components |
| Software reset capability | UART core reset via register write (EFR[7]), independent of hardware RESET pin - critical for runtime recovery |
| RS-485 automatic direction control | RTS pin toggles RS-485 transceiver DE/RE lines automatically during TX bursts, eliminating external logic |
| Independent TX/RX enable control | Transmitter and receiver can be disabled separately - useful for power gating or half-duplex RS-485 optimization |
Applications
| Industrial Serial Gateway | Portable Diagnostic Tool |
|---|---|
Use Scenario: Connecting legacy RS-232/RS-485 field devices (PLCs, sensors, meters) to I²C-based microcontrollers in factory automation panels. IC Role / Device Role / Timing Role: Protocol bridge converting I²C master commands into UART serial frames, managing flow control and RS-485 bus arbitration. Use Value: Eliminates need for discrete level shifters and external flow control logic while maintaining 5 Mbit/s throughput for real-time control loops. |
Use Scenario: Handheld medical or automotive diagnostic tool powered by coin cell, communicating with ECU or patient monitor via RS-232. IC Role / Device Role / Timing Role: Low-power UART interface with sleep current <30 µA, enabling multi-week battery life between charges. Use Value: Integrates 64-byte FIFOs and software reset to sustain reliable command/response sessions despite intermittent host CPU activity. |
| Smart Energy Meter Interface | IoT Edge Node Serial Hub |
Use Scenario: Secure two-way communication between utility meter MCU and optical/RF HAN module using RS-485 physical layer. IC Role / Device Role / Timing Role: RS-485 transceiver companion providing automatic driver direction control and polarity inversion via RTS pin. Use Value: Prevents bus contention and ensures deterministic half-duplex timing without firmware intervention or external gate logic. |
Use Scenario: Multi-sensor edge node aggregating data from GPS, environmental, and motion sensors before forwarding via cellular modem. IC Role / Device Role / Timing Role: Central UART concentrator with 8 GPIOs used for sensor enable/disable, interrupt routing, and status signaling. Use Value: Reduces BOM count by replacing discrete GPIO expanders and simplifies layout with single HVQFN24 footprint for serial + I/O consolidation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS760IBS | Supports 15 Mbit/s SPI clock and 1.152 Mbit/s IrDA SIR; otherwise identical register set and pinout | Required for high-throughput SPI hosts or 1.152 Mbit/s infrared links; not needed for standard I²C or 115.2 kbit/s IrDA | Select SC16IS760IBS only if SPI speed >4 Mbit/s or IrDA SIR >115.2 kbit/s is mandatory; SC16IS750IBS,157 remains optimal for cost-sensitive I²C designs. |
| SC16IS750IPW | TSSOP24 package (4.4 mm width); same electrical specs and register map; no thermal pad | Better suited for manual assembly or prototyping; lacks thermal performance of HVQFN24 for continuous 5 Mbit/s operation | Choose SC16IS750IPW for breadboarding or low-volume production where reflow thermal management is constrained; SC16IS750IBS,157 preferred for automated high-reliability manufacturing. |
Compared with SC16IS760IBS and SC16IS750IPW, the SC16IS750IBS,157 delivers optimal balance of I²C/SPI flexibility, ultra-low sleep current, and HVQFN24 thermal efficiency - making it the most cost-effective and manufacturable choice for industrial serial bridging where 4 Mbit/s SPI and 115.2 kbit/s IrDA meet system requirements.
Availability
SC16IS750IBS,157 is available at Aetrix Electronics and suitable for industrial serial gateways, portable diagnostic tools, and smart energy meter interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SC16IS750IBS,157 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 deep expertise in interface and mixed-signal IC design.
The SC16IS750IBS,157 belongs to NXP's SC16IS7xx UART bridge family, engineered specifically to simplify protocol conversion between modern embedded buses (I²C/SPI) and legacy serial standards (RS-232/RS-485/IrDA) in space-constrained, power-sensitive systems.
FAQ
What interface modes does the SC16IS750IBS,157 support?
The SC16IS750IBS,157 supports two mutually exclusive slave interface modes: I²C-bus (up to 400 kbit/s, fast-mode compliant) and SPI (up to 4 Mbit/s, Mode 0). Selection is controlled by the logic level on the I2C/SPI pin - HIGH for I²C, LOW for SPI. Pin functions such as A0/A1 (I²C address bits) or CS/SI/SO/SCLK (SPI signals) are dynamically reassigned based on this setting, and both configurations retain full 16C450 register compatibility.
Does the SC16IS750IBS,157 support RS-485 automatic direction control?
Yes, the SC16IS750IBS,157 provides built-in RS-485 driver direction control via its RTS output pin. When enabled through the Enhanced Feature Register (EFR[6]), RTS automatically toggles to assert the RS-485 transceiver's DE/RE lines during transmission and deassert them afterward - eliminating external logic gates or microcontroller GPIO overhead. The device also supports RTS polarity inversion to match transceiver-level requirements.
How many GPIOs does the SC16IS750IBS,157 offer, and what are their capabilities?
The SC16IS750IBS,157 provides eight programmable GPIOs (GPIO0–GPIO7), four of which double as modem status pins (DSR/DTR/CD/RI). All GPIOs are individually configurable as inputs or outputs via the IOControl register, support interrupt-on-change (enabled per-pin in IOIntEna), and retain state across software resets. They operate at the same voltage as VDD (2.5 V or 3.3 V) and tolerate 5 V on input when configured as inputs.
What is the maximum UART baud rate supported by the SC16IS750IBS,157?
The SC16IS750IBS,157 supports UART data rates up to 5 Mbit/s in 16× clock mode, achieved using an internal programmable baud rate generator that divides the input clock (from XTAL1 or external source) by divisors from 1 to 65535. This allows precise baud rate synthesis for standards including RS-232 (up to 3 Mbit/s typical), RS-485 (up to 5 Mbit/s), and custom protocols - all while maintaining ±1% accuracy over temperature and voltage.
Is the SC16IS750IBS,157 compatible with legacy 16C450 software drivers?
Yes, the SC16IS750IBS,157 implements a fully backward-compatible register set matching the industry-standard 16C450 UART, including identical memory-mapped addresses for THR/RHR, IER, IIR, LCR, MCR, MSR, and FCR. This enables direct porting of existing Linux kernel drivers, RTOS UART stacks, or bare-metal initialization code without modification - significantly reducing firmware development time and validation effort.
SC16IS750IBS,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 24-VFQFN Exposed Pad
- 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-HVQFN (4x4)
- Grade:
- -
- Qualification:
- -
SC16IS750IBS,157 FAQ
1.How can I place an order for SC16IS750IBS,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16IS750IBS,157 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 SC16IS750IBS,157 reliable?
The price and inventory of SC16IS750IBS,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16IS750IBS,157 is usually 5 days.
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SC16IS750IBS,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16IS750IBS,157 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 SC16IS750IBS,157?
For technical support, including SC16IS750IBS,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16IS750IBS,157 requirements.
6.How does Aetrix verify that SC16IS750IBS,157 is sourced from the original manufacturer or authorized distributors?
All SC16IS750IBS,157 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 SC16IS750IBS,157 meets industry standards.
7.What is the process for return or replacement of SC16IS750IBS,157?
All SC16IS750IBS,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16IS750IBS,157, 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 SC16IS750IBS,157 part is unused and in its original packaging.
Return procedure for SC16IS750IBS,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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