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NXP Semiconductors SC16C850LIBS,151
- Part No.:
- SC16C850LIBS,151
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16C850LIBS,151.pdf
- Description:
- IC UART SINGLE W/FIFO 32-HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,225
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Product details
Overview
SC16C850LIBS,151 from NXP Semiconductors is a 1.8 V single-channel Universal Asynchronous Receiver and Transmitter (UART) with 128-byte transmit/receive FIFOs, IrDA 1.0 encoder/decoder, and Intel/Motorola bus interface selectability via the 16/68 pin. It supports up to 5 Mbit/s data rate using an 80 MHz external clock and operates across −40 °C to +85 °C for industrial serial communication in embedded control systems.
For engineers reviewing the SC16C850LIBS,151 datasheet, SC16C850LIBS,151 pinout, SC16C850LIBS,151 application, or SC16C850LIBS,151 equivalent, key selection considerations include 128-byte FIFO programmability, hardware/software flow control support, RS-485 automatic driver turn-around, high-resolution clock prescaler (0–15, 1/16-step), and dual-bus interface flexibility in HVQFN32 packaging.
Technical Context
The SC16C850LIBS,151 implements a fully register-programmable UART core with extended mode enabling 128-level FIFO interrupt trigger and flow control thresholds. Its internal architecture includes independent transmitter/receiver enable logic, enhanced sleep mode with LOWPWR pin control, and dual-mode bus interface decoding (Intel 16-mode IOR/IOW or Motorola 68-mode R/W).
It integrates IrDA 1.0 physical layer encoding/decoding (≤115.2 kbit/s), automatic 9-bit RS-485 address detection, and programmable RS-485 driver turn-around delay via CLKPRES and RS485TIME registers. Baud rate generation uses a rational divider with 1/16-step granularity, supporting non-standard clocks without external PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V nominal - enables low-power operation in battery-backed or energy-constrained embedded systems. |
| Max Data Rate | 5 Mbit/s - achievable only with 80 MHz external clock; crystal-limited operation capped at 1.5 Mbit/s. |
| FIFO Depth | 128-byte TX/RX - reduces CPU interrupt frequency and bus bandwidth demand by >75% vs. legacy 16C550B (16-byte) or 16C650B (32-byte). |
| Bus Interface | Software-selectable Intel 16-mode or Motorola 68-mode - configured via 16/68 pin; eliminates need for external glue logic. |
| IrDA Support | IrDA 1.0 compliant (≤115.2 kbit/s) - integrated encoder/decoder eliminates external transceiver for short-range infrared links. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial automation, transportation, and outdoor equipment deployments. |
| RS-485 Features | Automatic address detection & driver turn-around - enables half-duplex multi-drop networks without host software timing intervention. |
Pinout & Package
SC16C850LIBS,151 is housed in a 5 mm × 5 mm × 0.85 mm HVQFN32 package (SOT617-1) with exposed thermal pad. The package supports both Intel (16-mode) and Motorola (68-mode) parallel bus interfaces via pin-strapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable for UART register access; required to assert before reading/writing internal registers. |
| IOR / R/W | Read Strobe (16-mode) or Read/Write Control (68-mode) | Determines bus protocol mode; in 68-mode, logic HIGH = read, LOW = write. |
| IOW / R/W | Write Strobe (16-mode) or Read/Write Control (68-mode) | Shared with R/W in 68-mode; decouples bus timing from CPU clock domain. |
| A0–A2 | Address Select | 3-bit register address decoder - selects among 25+ internal registers including THR/RHR, IER/ISR, FCR, LCR, MCR/MSR. |
| INT / IRQ | Interrupt Output | Configurable active-HIGH (16-mode) or open-drain active-LOW (68-mode); supports nested interrupt handling. |
| LOWPWR | Low-Power Enable | Active-HIGH entry into power-down mode; disables oscillator and isolates host bus pins to reduce leakage current. |
| TX / RX | Serial Data I/O | Full-duplex asynchronous interface; supports local loopback for self-test without external cabling. |
| RTS / CTS / DTR / DSR / RI / CD | Modem Control Signals | Hardware flow control and status reporting per EIA/TIA-232 standard; all inputs debounced and interrupt-capable. |
| XTAL1 / XTAL2 | Clock Input/Output | Supports crystal (1–25 MHz) or external clock (up to 80 MHz); XTAL2 floats when external clock applied to XTAL1. |
Key Features
| Feature | Design Value |
|---|---|
| 128-level programmable FIFO triggers | Enables precise interrupt scheduling - e.g., set TX interrupt at 64 bytes to balance latency vs. CPU load in real-time protocols. |
| Automatic RS-485 driver turn-around | Eliminates software-controlled GPIO toggling delays - ensures reliable half-duplex timing even at 5 Mbit/s. |
| High-resolution baud rate prescaler | 0–15 range with 1/16-step resolution allows exact match to non-standard rates like 1.8432 Mbps or 3.6864 Mbps. |
| Dual Xon/Xoff character support | Prevents false flow control activation - requires two consecutive matching bytes (e.g., 0x11 0x13) to suspend/resume transmission. |
| Enhanced sleep mode with LOWPWR | Reduces quiescent current to <10 µA - extends battery life in portable diagnostics tools and remote sensors. |
Applications
| Industrial PLC Serial Gateway | Medical Device Data Logger |
|---|---|
Use Scenario: Connects legacy RS-232/RS-485 field devices to a modern ARM-based controller via parallel bus. IC Role / Device Role / Timing Role: UART bridge with hardware flow control and 128-byte buffering to absorb bursty sensor data without packet loss. Use Value: Eliminates CPU polling overhead - interrupt-driven 128-byte bursts cut host processing time by 4× vs. 16-byte FIFO solutions. | Use Scenario: Captures ECG waveform data from analog front-end and streams it wirelessly via IrDA to a bedside monitor. IC Role / Device Role / Timing Role: IrDA 1.0 PHY layer interface with integrated encoder/decoder and 115.2 kbit/s baseband modulation. Use Value: Removes discrete IrDA transceiver IC and associated passive components - reduces BOM count by 7 parts and PCB area by 24 mm². |
| Automotive Diagnostic Tool | Smart Energy Meter Communication Module |
Use Scenario: Interfaces OBD-II port (ISO 9141-2/K-Line) to microcontroller using software-configurable 9-bit address detection. IC Role / Device Role / Timing Role: UART with automatic 9-bit mode and RS-485 turn-around for half-duplex K-Line compliance. Use Value: Enables direct K-Line protocol handling without bit-banging - meets ISO 14230 timing requirements at 10.4 kbit/s. | Use Scenario: Provides secure, isolated serial link between metrology ASIC and HAN (Home Area Network) controller over RS-485. IC Role / Device Role / Timing Role: Industrial-grade UART with −40 °C to +85 °C operation and robust ESD protection on all I/O pins. Use Value: Guarantees uninterrupted metering data transfer in unconditioned utility cabinets - validated for 15-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C750IBS,151 | 32-byte FIFOs (vs. 128-byte), no IrDA, same 1.8 V HVQFN32 package and pinout. | Lacks RS-485 auto-turnaround and IrDA; suitable only for basic point-to-point RS-232 links. | Select when cost sensitivity outweighs throughput needs and IrDA/RS-485 features are unused. |
| TL16C752BIPM | Dual-channel UART, 64-byte FIFOs per channel, 3.3 V supply, TQFP48 package - no 16/68 bus mode or LOWPWR pin. | Designed for multi-port server/console applications; incompatible voltage and package footprint. | Choose only if system requires dual UARTs and can accommodate 3.3 V level-shifting and larger board area. |
Compared with SC16C750IBS,151, the SC16C850LIBS,151 delivers 4× deeper FIFO buffering and integrated IrDA/RS-485 features in identical packaging; versus TL16C752BIPM, it offers lower voltage, smaller footprint, and advanced power management but lacks channel count - making it optimal for space-constrained, single-link industrial designs.
Availability
SC16C850LIBS,151 is available at Aetrix Electronics and suitable for industrial PLC gateways, medical data loggers, automotive diagnostic tools, and smart energy meter communication modules requiring stable component supply and long-term lifecycle support.
Supply support for SC16C850LIBS,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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The SC16C850L product line was designed to replace legacy 16C550/16C650 UARTs with enhanced FIFO depth, low-voltage operation, and integrated protocol acceleration - targeting next-generation industrial controllers and portable instrumentation.
FAQ
What bus interface modes does the SC16C850LIBS,151 support?
The SC16C850LIBS,151 supports both Intel 16-mode (using IOR/IOW strobes) and Motorola 68-mode (using R/W control) via the 16/68 pin. When the pin is logic HIGH or unconnected (internally pulled up), it defaults to 16-mode; logic LOW selects 68-mode. This eliminates external bus translation logic and simplifies integration with diverse host processors.
Does the SC16C850LIBS,151 support RS-485 half-duplex operation?
Yes, the SC16C850LIBS,151 supports automatic RS-485 driver turn-around with programmable delay via the RS485TIME register. It also provides 9-bit address detection to identify target nodes in multi-drop networks - enabling compliant half-duplex communication without host CPU timing intervention.
What is the maximum serial data rate achievable with SC16C850LIBS,151?
The SC16C850LIBS,151 achieves up to 5 Mbit/s when driven by an 80 MHz external clock. With a crystal oscillator, the maximum rate is 1.5 Mbit/s. The baud rate generator uses a high-resolution prescaler (0–15, 1/16-step) to precisely match non-standard rates such as 1.8432 Mbps or 3.6864 Mbps.
How does the SC16C850LIBS,151 manage power in battery-operated systems?
The SC16C850LIBS,151 includes a dedicated LOWPWR pin that, when asserted HIGH, immediately shuts down the internal oscillator and isolates host interface pins to reduce leakage current. In this state, quiescent current drops below 10 µA - extending operational life in portable diagnostic tools and remote sensors.
Can the SC16C850LIBS,151 be used for infrared communication?
Yes, the SC16C850LIBS,151 integrates a full IrDA 1.0 encoder/decoder supporting up to 115.2 kbit/s. It handles pulse shaping, encoding (RZI), and decoding internally - eliminating the need for external IrDA transceivers and reducing BOM cost and PCB area in handheld medical or consumer devices.
SC16C850LIBS,151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 1, UART
- FIFO's:
- 128 Byte
- Protocol:
- RS485
- Data Rate (Max):
- 5Mbps
- Voltage - Supply:
- 1.8V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- Yes
- With False Start Bit Detection:
- Yes
- With Modem Control:
- Yes
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HVQFN (5x5)
SC16C850LIBS,151 FAQ
1.How can I place an order for SC16C850LIBS,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C850LIBS,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 SC16C850LIBS,151 reliable?
The price and inventory of SC16C850LIBS,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C850LIBS,151 is usually 5 days.
3.What payment methods are accepted for SC16C850LIBS,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C850LIBS,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C850LIBS,151?
SC16C850LIBS,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C850LIBS,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 SC16C850LIBS,151?
For technical support, including SC16C850LIBS,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C850LIBS,151 requirements.
6.How does Aetrix verify that SC16C850LIBS,151 is sourced from the original manufacturer or authorized distributors?
All SC16C850LIBS,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 SC16C850LIBS,151 meets industry standards.
7.What is the process for return or replacement of SC16C850LIBS,151?
All SC16C850LIBS,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C850LIBS,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 SC16C850LIBS,151 part is unused and in its original packaging.
Return procedure for SC16C850LIBS,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C850LIBS,151 Tags
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SC16IS741AIPWJ
NXP Semiconductors
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TL16C550CIPTR
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