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NXP Semiconductors SC16IS752IBS,157
- Part No.:
- SC16IS752IBS,157
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16IS752IBS,157.pdf
- Description:
- IC DUAL UART 64BYTE 32HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,816
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Product details
Overview
SC16IS752IBS,157 from NXP Semiconductors is a dual-channel UART IC with I²C-bus or SPI interface, supporting up to 5 Mbit/s data rates, 64-byte TX/RX FIFOs per channel, 8 programmable GPIOs, and automatic RS-485 direction control via RTS - enabling protocol bridging in compact battery-powered industrial gateways.
For engineers reviewing the SC16IS752IBS,157 datasheet, SC16IS752IBS,157 pinout, SC16IS752IBS,157 application, or SC16IS752IBS,157 equivalent, key selection considerations include its HVQFN32 package, 3.3 V/2.5 V operation, −40 °C to +95 °C industrial temperature range, IrDA SIR support (up to 115.2 kbit/s), and software-reset capability independent of hardware reset.
Technical Context
The SC16IS752IBS,157 implements two independent, fully programmable UART channels with register compatibility to the 16C450, supporting 5–8-bit character length, even/odd/no parity, and 1/1.5/2 stop bits. Its internal baud rate generator divides a clock input by divisors from 1 to 65,535, enabling precise rate synthesis across wide frequency ranges.
It integrates dual 64-byte FIFOs with independently configurable trigger levels (via FCR or TLR), auto hardware flow control (Auto-RTS/Auto-CTS), auto software flow control (Xon/Xoff), and built-in IrDA encoder/decoder. The I²C interface operates at up to 400 kbit/s (Fast-mode), while SPI mode supports up to 4 Mbit/s (Mode 0, slave only).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 5 Mbit/s in 16× clock mode - enables high-speed serial bridging for RS-232/RS-485 links without CPU overhead. |
| FIFO Depth | 64 bytes per channel (TX + RX) - reduces host interrupt load and prevents overrun in bursty communication. |
| Interface Options | I²C-bus (400 kbit/s Fast-mode) or SPI (4 Mbit/s, Mode 0) - selectable via I2C/SPI pin; no firmware rework needed when switching buses. |
| Supply Voltage | 2.5 V or 3.3 V - compatible with modern low-voltage microcontrollers and battery-operated systems. |
| Operating Temperature | −40 °C to +95 °C - certified for industrial environments including factory automation and outdoor telemetry. |
| Sleep Current | <30 µA at 3.3 V - extends battery life in portable devices during idle periods without external power gating. |
| GPIO Pins | 8 programmable I/Os - usable as modem control signals (DSR/DTR/RI/CD) or general-purpose digital I/O via IOControl register. |
Pinout & Package
HVQFN32 (SOT617-1) package: 5 mm × 5 mm × 0.85 mm body, thermally enhanced exposed center pad requiring PCB ground connection for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (pins 5, 13, 28) | Power supply | Three dedicated VDD pins ensure stable core and I/O rail distribution; decoupling required near each pin. |
| VSS (pins 12, 21, 29 + center pad) | Ground | Four ground connections including thermally critical exposed pad - mandatory soldering to PCB ground plane for reliability. |
| I2C/SPI (pin 6) | Interface select | Logic HIGH = I²C mode; LOW = SPI mode - sets internal bus controller architecture before initialization. |
| IRQ (pin 14) | Interrupt output | Open-drain active-LOW signal; requires external 1 kΩ pull-up to VDD (3.3 V) for proper interrupt assertion. |
| RTSA / RTSB (pins 30, 16) | UART request-to-send | Active-LOW outputs used for automatic RS-485 driver direction control when Auto-RTS enabled in EFR. |
| GPIO0–GPIO7 (pins 17–27) | Programmable I/O | Configurable as modem status/control (DSR/DTR/RI/CD) or generic bidirectional I/O via IOControl register bits. |
Key Features
| Feature | Design Value |
|---|---|
| Dual UART with 16C450 register compatibility | Enables drop-in software porting from legacy platforms without driver rewrite - critical for rapid migration in industrial firmware stacks. |
| Automatic RS-485 half-duplex control | RTS-driven direction management eliminates need for external transceiver control logic or timing-critical GPIO toggling. |
| Independent FIFO trigger level programming | Per-channel RX/TX trigger thresholds (FCR or TLR) allow fine-tuned interrupt latency vs. CPU load trade-offs in real-time systems. |
| Hardware/software flow control coexistence | Auto-CTS and Xon/Xoff can be enabled separately per channel - supports mixed legacy and modern protocol requirements. |
| Software-initiated reset | Full UART register reset via EFR write - avoids system-level reset or power cycle during field firmware updates or error recovery. |
Applications
| Factory Automation Gateway | Portable Diagnostic Tool |
|---|---|
Use Scenario: Interfacing PLCs and sensors over RS-485 while connecting to an ARM-based controller via I²C. IC Role / Device Role / Timing Role: Dual UART bridge converting I²C master commands into two independent RS-485 streams with automatic driver direction control. Use Value: Eliminates discrete level shifters and GPIO-controlled direction logic; 64-byte FIFOs absorb jitter from multi-drop bus arbitration delays. |
Use Scenario: Handheld medical device tester communicating with legacy ECG monitors via RS-232 and logging data to an embedded MCU over SPI. IC Role / Device Role / Timing Role: Dual asynchronous serial interface with independent baud rate configuration and sleep-mode current reduction. Use Value: Enables 2-week battery life via <30 µA sleep current and automatic wake-on-RX, while maintaining full UART feature set. |
| Cellular Data Terminal | Smart Energy Meter Interface |
Use Scenario: LTE module interfacing with host processor using UART for AT command exchange and firmware updates. IC Role / Device Role / Timing Role: High-speed (5 Mbit/s) UART channel handling AT command traffic, second channel managing SIM card diagnostics or debug logs. Use Value: Prevents command loss during OTA updates via 64-byte TX FIFO buffering and Auto-CTS handshake with modem. |
Use Scenario: AMI meter communicating with concentrator via RS-485 and local maintenance port via RS-232, both managed by single host MCU. IC Role / Device Role / Timing Role: Dual isolated UART interface with IrDA SIR (115.2 kbit/s) for optical configuration and secure firmware loading. Use Value: Reduces BOM count by consolidating two physical UART peripherals and enabling optical programming without additional transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS750IPW | Single-channel UART; same I²C/SPI interface, 64-byte FIFO, and GPIO features - lacks second UART channel and RS-485 auto-direction control. | Suitable only where one serial link suffices; cannot replace dual-link requirement without redesign. | Select only if system requires exactly one UART path and board space is constrained - no pin compatibility with SC16IS752IBS,157. |
| MAX3107ETJ+ | Single-channel UART with SPI-only interface (no I²C); supports higher SPI speed (10 Mbit/s); includes integrated ±15 kV ESD protection on UART pins. | Better suited for noise-prone industrial RS-232 lines but requires separate RS-485 transceiver and external direction control logic. | Choose when ESD robustness is primary concern and dual UART functionality is not required - different pinout and register map. |
Compared with SC16IS752IBS,157, SC16IS750IPW reduces channel count and removes RS-485 automation, while MAX3107ETJ+ adds ESD protection but sacrifices dual-channel capability and I²C support - making SC16IS752IBS,157 uniquely balanced for compact dual-interface industrial bridging.
Availability
SC16IS752IBS,157 is available at Aetrix Electronics and suitable for factory automation gateways, portable diagnostic tools, and cellular data terminals requiring stable component supply, long-term industrial qualification, and HVQFN32 footprint consistency.
Supply support for SC16IS752IBS,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 ICs.
The SC16IS752IBS,157 belongs to NXP's serial interface bridge portfolio, designed specifically to simplify protocol translation between microcontroller buses (I²C/SPI) and legacy serial standards (RS-232/RS-485/IrDA) in space-constrained, power-sensitive systems.
FAQ
What interface protocols does the SC16IS752IBS,157 support?
The SC16IS752IBS,157 supports both I²C-bus (up to 400 kbit/s Fast-mode) and SPI (up to 4 Mbit/s, Mode 0, slave only), selected via the I2C/SPI pin. It does not support UART-to-UART bridging or USB interfaces. Each interface provides full register access to both UART channels and GPIOs, with identical functional behavior regardless of bus choice.
Does the SC16IS752IBS,157 support RS-485 automatic direction control?
Yes, the SC16IS752IBS,157 supports automatic RS-485 half-duplex driver direction control using the RTSA and RTSB pins. When Auto-RTS is enabled in the Enhanced Features Register (EFR[6]), RTS asserts when the RX FIFO has space and de-asserts when full - eliminating need for external direction logic or timing-critical GPIO toggling in SC16IS752IBS,157-based designs.
What is the maximum baud rate achievable with the SC16IS752IBS,157?
The SC16IS752IBS,157 achieves up to 5 Mbit/s in 16× clock mode, dependent on the input clock frequency and divisor setting in the DLL/DLH registers. For example, with a 60 MHz crystal, a divisor of 12 yields 5 Mbit/s. Baud rate accuracy remains within ±1.5% across voltage and temperature when using crystal-based timing - critical for reliable high-speed RS-485 communication in SC16IS752IBS,157 implementations.
How many GPIO pins does the SC16IS752IBS,157 provide, and what functions do they support?
The SC16IS752IBS,157 provides eight bidirectional GPIO pins (GPIO0–GPIO7), configurable either as general-purpose I/O or as modem control/status signals (DSR/DTR/RI/CD) via the IOControl register. Each pin supports programmable direction, interrupt-on-change, and polarity inversion - enabling flexible integration with legacy modems or custom peripheral signaling without external logic in SC16IS752IBS,157-based systems.
Is the SC16IS752IBS,157 compatible with the 16C450 UART register set?
Yes, the SC16IS752IBS,157 implements full backward compatibility with the industry-standard 16C450 register map, including Line Control, Interrupt Enable, Modem Control, and Line Status registers. This allows existing drivers and firmware written for 16C450-based systems to operate without modification - significantly accelerating development and validation cycles for SC16IS752IBS,157 integration.
SC16IS752IBS,157 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,157 FAQ
1.How can I place an order for SC16IS752IBS,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16IS752IBS,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 SC16IS752IBS,157 reliable?
The price and inventory of SC16IS752IBS,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16IS752IBS,157 is usually 5 days.
3.What payment methods are accepted for SC16IS752IBS,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16IS752IBS,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16IS752IBS,157?
SC16IS752IBS,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16IS752IBS,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 SC16IS752IBS,157?
For technical support, including SC16IS752IBS,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16IS752IBS,157 requirements.
6.How does Aetrix verify that SC16IS752IBS,157 is sourced from the original manufacturer or authorized distributors?
All SC16IS752IBS,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 SC16IS752IBS,157 meets industry standards.
7.What is the process for return or replacement of SC16IS752IBS,157?
All SC16IS752IBS,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16IS752IBS,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 SC16IS752IBS,157 part is unused and in its original packaging.
Return procedure for SC16IS752IBS,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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