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NXP Semiconductors SC16IS752IBS,151
- Part No.:
- SC16IS752IBS,151
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16IS752IBS,151.pdf
- Description:
- IC UART DUAL I2C/SPI 32-HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,067
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Product details
Overview
SC16IS752IBS,151 from NXP Semiconductors is a dual-channel UART IC with I²C-bus or SPI interface, 64-byte TX/RX FIFOs, IrDA SIR encoder/decoder (up to 115.2 kbit/s), and eight programmable GPIOs. It operates at 2.5 V or 3.3 V, supports baud rates up to 5 Mbit/s, and targets RS-232/RS-485 protocol bridging in space-constrained industrial and portable systems.
For engineers reviewing the SC16IS752IBS,151 datasheet, SC16IS752IBS,151 pinout, SC16IS752IBS,151 application, or SC16IS752IBS,151 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options - all specific to the HVQFN32-packaged SC16IS752IBS variant.
Technical Context
The SC16IS752IBS,151 implements two independent full-duplex UART channels with register compatibility to the 16C450, enabling drop-in software porting. Its internal architecture integrates dual 64-byte FIFOs with independently programmable trigger levels via FCR and TLR registers, and supports auto hardware flow control (Auto-RTS/Auto-CTS) using RTS/CTS pins per channel.
Interface selection is controlled by the dedicated I2C/SPI pin: logic HIGH enables I²C-bus (Fast Mode, 400 kbit/s, target-only); logic LOW enables SPI (Mode 0, 4 Mbit/s max, target-only). The device includes built-in IrDA SIR encoding/decoding and supports automatic RS-485 driver direction control via RTS signal inversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UART Channels | Dual independent full-duplex UARTs (Channel A and Channel B) |
| Max Baud Rate | 5 Mbit/s in 16× clock mode - enables high-speed serial bridging without oversampling limitations |
| FIFO Depth | 64 bytes per channel for TX and RX - reduces host CPU interrupt load and prevents data loss under burst traffic |
| Interface Options | I²C-bus (400 kbit/s) or SPI (4 Mbit/s) - selectable via dedicated I2C/SPI pin; no external configuration required |
| IrDA Support | Built-in IrDA SIR encoder/decoder up to 115.2 kbit/s - eliminates need for external transceiver in infrared applications |
| GPIO Pins | 8 programmable I/O pins (GPIO0–GPIO7), configurable as modem control signals or general-purpose I/O |
| Supply Voltage | 2.5 V or 3.3 V operation - compatible with modern low-voltage microcontrollers and SoCs |
| Sleep Current | <30 μA at 3.3 V - enables battery longevity in always-on portable and IoT edge nodes |
Pinout & Package
HVQFN32 package (5 × 5 × 0.85 mm, thermal-enhanced, exposed center pad soldered to PCB ground) - optimized for thermal dissipation and board space efficiency in handheld and embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXA / TXB | UART Channel A/B Transmitter Output | CMOS-level serial output; disabled during local loopback mode |
| RXA / RXB | UART Channel A/B Receiver Input | CMOS-level serial input; internally looped to TX during local loopback |
| RTSA / RTSB | Request-to-Send (active LOW), Channel A/B | Hardware flow control output; auto-controlled via EFR[6] for RX FIFO level management |
| CTSA / CTSB | Clear-to-Send (active LOW), Channel A/B | Hardware flow control input; enables Auto-CTS when EFR[7] is set |
| IRQ | Interrupt Request (open-drain, active LOW) | Seven-priority interrupt output; requires external 1 kΩ pull-up to VDD (3.3 V) |
| I2C/SPI | Interface Selection Control | Logic HIGH = I²C mode; logic LOW = SPI mode - determines function of SDA/SO/SCLK/SCL pins |
| GPIO0–GPIO7 | Programmable I/O Terminals | Configurable as modem signals (DSR/DTR/CD/RI) or generic I/O via IOControl register |
| RESET | Hardware Reset (active LOW) | Asynchronous reset; initializes registers per Table 4 and sets outputs per Table 5 |
| VDD / VSS | Power Supply / Ground | VDD on pins 5, 13, 28; VSS on pins 12, 21, 29 + exposed center pad - all must be connected to system ground |
Key Features
| Feature | Design Value |
|---|---|
| Backward-compatible register map | Fully matches 16C450 addressing and bit definitions - enables reuse of legacy UART drivers and BSP code |
| Auto RS-485 direction control | RTS-driven automatic DE/RE control with polarity inversion support - eliminates external logic for half-duplex bus termination |
| Programmable Xon/Xoff flow control | Supports single/dual Xon and Xoff characters with configurable comparison logic - enables robust software handshaking in noisy environments |
| Independent FIFO trigger levels | Separate programmable thresholds for TX and RX FIFO interrupts via TLR register - allows fine-grained latency vs. throughput trade-offs |
| 5 V tolerant inputs | All digital inputs (except XTAL1/XTAL2) accept 5 V logic - simplifies interfacing with mixed-voltage systems without level shifters |
| Internal oscillator support | Crystal oscillator circuit between XTAL1/XTAL2 (1–25 MHz) or external clock input on XTAL1 - removes need for external clock source |
Applications
| Industrial Serial Gateway | Portable Medical Device Interface |
|---|---|
|
Use Scenario: Connecting legacy RS-485 field instruments (PLC sensors, flow meters) to an I²C-based ARM Cortex-M host MCU in a factory automation panel. IC Role / Device Role / Timing Role: Protocol bridge converting I²C master commands into dual UART RS-485 frames; manages RTS-driven automatic bus direction and hardware flow control. Use Value: Eliminates discrete level shifters and direction-control logic; 64-byte FIFOs absorb burst sensor data without host polling overhead. |
Use Scenario: Enabling bidirectional serial communication between a low-power wearable ECG monitor and a Bluetooth LE MCU over UART, while supporting infrared diagnostics via IrDA. IC Role / Device Role / Timing Role: Dual UART hub handling concurrent ECG telemetry (Channel A) and IrDA firmware updates (Channel B); enters sleep mode (<30 μA) between transmissions. Use Value: Integrates IrDA SIR PHY and 8 GPIOs for button/LED control - reduces BOM count and PCB area in compact medical enclosures. |
| Smart Energy Meter Communication | POS Terminal Peripheral Hub |
|
Use Scenario: Adding isolated RS-232 and RS-485 connectivity to a smart electricity meter using a single SPI-connected host processor. IC Role / Device Role / Timing Role: SPI-target UART co-processor managing asynchronous metering data streams; uses Auto-CTS to prevent buffer overrun during peak load reporting. Use Value: 5 V tolerant inputs interface directly with opto-isolated RS-232 transceivers; industrial temp range (−40 °C to +95 °C) ensures reliability in outdoor meter cabinets. |
Use Scenario: Consolidating barcode scanner, magnetic stripe reader, and receipt printer interfaces into one compact point-of-sale terminal using a single I²C bus. IC Role / Device Role / Timing Role: I²C-slave dual UART concentrator assigning Channel A to scanner (38.4 kbit/s) and Channel B to printer (115.2 kbit/s); GPIOs drive status LEDs and detect button presses. Use Value: 64-byte FIFOs absorb scanner decode bursts and printer spooling latency; software reset capability enables recovery without power cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART with I²C/SPI interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS752IPW | TSSOP28 package (4.4 mm body width); identical electrical specs and register set - same die, different footprint | Preferred where manual assembly, rework, or thermal constraints favor larger leaded package over HVQFN | Select SC16IS752IPW only if PCB layout cannot accommodate HVQFN32 or requires easier prototyping |
| SC16IS762IBS | Supports 15 Mbit/s SPI clock (vs. 4 Mbit/s) and 1.152 Mbit/s IrDA SIR (vs. 115.2 kbit/s); otherwise pin- and register-compatible | Required only when system demands >4 Mbit/s SPI throughput or full-speed IrDA MIR interoperability (not supported by SC16IS752IBS,151) | Choose SC16IS762IBS only if both higher SPI speed and 1.152 Mbit/s IrDA are mandatory; otherwise SC16IS752IBS,151 is cost-optimized |
Compared with SC16IS752IPW, SC16IS752IBS,151 offers superior thermal performance and smaller footprint but requires reflow-suitable layout; compared with SC16IS762IBS, it trades IrDA and SPI speed headroom for lower cost and proven stability in established 4 Mbit/s SPI designs.
Availability
SC16IS752IBS,151 is available at Aetrix Electronics and suitable for industrial serial gateways, portable medical devices, smart energy meters, and POS terminal peripheral hubs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SC16IS752IBS,151 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 ICs.
The SC16IS752IBS,151 belongs to NXP's SC16IS family of intelligent UART bridges, designed specifically to simplify protocol translation between modern microcontrollers (I²C/SPI) and legacy serial peripherals (RS-232/RS-485/IrDA) in resource-constrained embedded systems.
FAQ
What interface modes does the SC16IS752IBS,151 support, and how is selection performed?
The SC16IS752IBS,151 supports either I²C-bus (Fast Mode, 400 kbit/s) or SPI (Mode 0, 4 Mbit/s max) - selected by the logic level on the dedicated I2C/SPI pin. A HIGH level configures I²C mode, assigning SDA/SCL functions; a LOW level configures SPI mode, assigning SO/SI/SCLK/CS functions. This pin must be hardwired before power-up and cannot be changed dynamically during operation. The SC16IS752IBS,151 does not support simultaneous or auto-sensing interface operation.
Does the SC16IS752IBS,151 support automatic RS-485 driver direction control, and how is it implemented?
Yes, the SC16IS752IBS,151 supports automatic RS-485 driver direction control using the RTS signal. When enabled via the Enhanced Features Register (EFR[4]), the device asserts RTS to enable the RS-485 driver during transmission and de-asserts it after the final stop bit. Polarity inversion is configurable via the Extra Features Control Register (XON1[7]). This eliminates external direction-control logic and ensures precise timing alignment with UART frame boundaries - critical for reliable half-duplex RS-485 communication.
What is the maximum IrDA SIR data rate supported by the SC16IS752IBS,151, and is external transceiver hardware required?
The SC16IS752IBS,151 integrates a complete IrDA SIR encoder and decoder supporting data rates up to 115.2 kbit/s. No external IrDA transceiver is required - the UART handles pulse shaping, encoding (RZI), and decoding internally. The SC16IS752IBS,151 does not support higher IrDA speeds such as MIR (1.152 Mbit/s) or FIR (4 Mbit/s); that capability is exclusive to the SC16IS762 variant. For 115.2 kbit/s infrared links, only a standard IrDA photodiode/phototransistor pair is needed.
How many GPIO pins does the SC16IS752IBS,151 provide, and what are their dual-function capabilities?
The SC16IS752IBS,151 provides eight bidirectional GPIO pins (GPIO0 through GPIO7), each configurable via the IOControl register. Each pin can operate as a general-purpose I/O or be mapped to a modem control signal: GPIO0–GPIO3 support RIB/CDB/DTRB/DSRB (Channel B), and GPIO4–GPIO7 support DSRA/DTRA/CDA/RIA (Channel A). These pins support interrupt-on-change and can be individually programmed for input/output direction, pull-up/down, and open-drain operation - enabling flexible peripheral interfacing without additional I/O expanders.
What are the power supply requirements and sleep current specifications for the SC16IS752IBS,151?
The SC16IS752IBS,151 operates from a single 2.5 V or 3.3 V supply, with all digital inputs 5 V tolerant (except XTAL1/XTAL2). Sleep mode is entered when the Enhanced Functions bit (EFR[4]) and Interrupt Enable Register bit 4 (IER[4]) are both set, and no activity is detected on UART or GPIO lines. In this state, the SC16IS752IBS,151 draws less than 30 μA at 3.3 V - verified per datasheet Rev. 9.1 - making it suitable for battery-powered applications requiring multi-year operation between charges.
SC16IS752IBS,151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-VFQFN Exposed Pad
- Programmable:
- Not Verified
- Protocol:
- RS232, RS485
- Function:
- Controller
- Interface:
- I2C, SPI, UART
- Standards:
- -
- Voltage - Supply:
- 2.5V, 3.3V
- Current - Supply:
- 2mA
- Operating Temperature:
- -40°C ~ 95°C
- Supplier Device Package:
- 32-HVQFN (5x5)
- Grade:
- -
- Qualification:
- -
SC16IS752IBS,151 FAQ
1.How can I place an order for SC16IS752IBS,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16IS752IBS,151 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 SC16IS752IBS,151 reliable?
The price and inventory of SC16IS752IBS,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16IS752IBS,151 is usually 5 days.
3.What payment methods are accepted for SC16IS752IBS,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16IS752IBS,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16IS752IBS,151?
SC16IS752IBS,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16IS752IBS,151 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 SC16IS752IBS,151?
For technical support, including SC16IS752IBS,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16IS752IBS,151 requirements.
6.How does Aetrix verify that SC16IS752IBS,151 is sourced from the original manufacturer or authorized distributors?
All SC16IS752IBS,151 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 SC16IS752IBS,151 meets industry standards.
7.What is the process for return or replacement of SC16IS752IBS,151?
All SC16IS752IBS,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16IS752IBS,151, 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 SC16IS752IBS,151 part is unused and in its original packaging.
Return procedure for SC16IS752IBS,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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