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NXP Semiconductors SC16C850IBS,151
- Part No.:
- SC16C850IBS,151
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16C850IBS,151.pdf
- Description:
- IC UART SGL-CH 3.3V 32-HVQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SC16C850IBS,151 from NXP Semiconductors is a 2.5 V to 3.3 V single-channel UART IC with 128-byte transmit/receive FIFOs, IrDA 1.0 encoder/decoder, and selectable Intel (16-mode) or Motorola (68-mode) parallel bus interface. It supports up to 5 Mbit/s data rate with programmable baud rate generator and automatic RS-485 driver turn-around, deployed in industrial serial gateways and embedded communication controllers.
For engineers reviewing the SC16C850IBS,151 datasheet, SC16C850IBS,151 pinout, SC16C850IBS,151 application, or SC16C850IBS,151 equivalent, key selection considerations include HVQFN32 package compatibility, 128-byte FIFO interrupt trigger programmability, RS-485 auto-turnaround timing control, IrDA 115.2 kbit/s support, and industrial −40 °C to +85 °C operation.
Technical Context
The SC16C850IBS,151 implements a dual-mode parallel host interface (Intel 16-mode or Motorola 68-mode selected via 16/68 pin), with register-mapped access using A0–A2 address lines and IOR/IOW or R/W control logic. Its UART core includes independent TX/RX shift registers, 128-byte FIFOs with level counters and programmable trigger thresholds, and integrated IrDA encoder/decoder compliant with IrDA 1.0 physical layer.
It features hardware flow control (RTS/CTS or DTR/DSR), software Xon/Xoff flow control with dual-character detection, automatic 9-bit RS-485 address detection, and a high-resolution clock prescaler (0–15, 1/16-step granularity) enabling non-standard UART clock inputs. The LOWPWR pin enables immediate low-power mode entry with oscillator shutdown and bus isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 3.3 V - Enables direct integration into modern low-voltage embedded systems without level-shifting. |
| Max Data Rate | 5 Mbit/s - Achievable with 80 MHz external clock; supports high-speed modem and network interface applications. |
| FIFO Depth | 128-byte TX & RX - Reduces CPU interrupt frequency and bus bandwidth demand by >3× vs. 32-byte SC16C650B. |
| IrDA Support | IrDA 1.0 up to 115.2 kbit/s - Integrated encoder/decoder eliminates external transceiver for short-range IR links. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial automation, transportation, and outdoor equipment deployment. |
| RS-485 Features | Auto-turnaround with programmable delay + 9-bit address detection - Enables robust multi-drop bus control without external logic. |
| Bus Interface | Selectable Intel 16-mode or Motorola 68-mode - Compatible with legacy x86 and 68k-based controller designs via 16/68 pin. |
Pinout & Package
HVQFN32 (SOT617-1) package: plastic thermal enhanced very thin quad flat package; no leads; 32 terminals; body 5 × 5 × 0.85 mm. Exposed center pad must be soldered to PCB thermal pad with vias for optimal thermal performance and signal integrity.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select (active LOW) | Enables UART register access only when asserted; isolates device from host bus otherwise. |
| IOR / IOW | Read/Write Strobe (16-mode) | In Intel mode: IOR active LOW for read, IOW active LOW for write; determines register access timing. |
| A0–A2 | Register Address Select | Decodes 25 internal registers including THR/RHR, LCR/LSR, MCR/MSR, FCR, EFR, and FIFO level counters. |
| TX / RX | UART Serial I/O | Full-duplex asynchronous serial interface; supports TTL-level signaling and local loopback diagnostics. |
| RTS / CTS / DTR / DSR / RI / CD | Modem Control Signals | Hardware flow control and status monitoring per EIA/TIA-232 standard; configurable via MCR/MSR registers. |
| INT | Interrupt Output (active HIGH) | Open-source output; polarity and enable controlled by MCR[5]; signals FIFO, error, or modem status events. |
| LOWPWR | Low Power Enable (active HIGH) | Shuts down oscillator and isolates host interface pins; auto-resets on de-assertion with 22 kΩ internal pull-down. |
| XTAL1 / XTAL2 | Crystal Oscillator Interface | Supports 1–80 MHz clock source; XTAL1 accepts external clock; XTAL2 outputs buffered clock or crystal feedback. |
Key Features
| Feature | Design Value |
|---|---|
| 128-byte programmable FIFO trigger levels | TXINTLVL/RXINTLVL registers allow 1–128 byte granularity - enables precise interrupt scheduling for real-time OS task alignment. |
| Automatic RS-485 driver turn-around | Programmable delay via RS485TIME register - eliminates external timing circuitry and ensures reliable half-duplex bus arbitration. |
| IrDA 1.0 encoder/decoder | Integrated physical layer for 115.2 kbit/s infrared - removes need for external IrDA transceiver IC and associated analog components. |
| High-resolution baud rate prescaler | 0–15 range with 1/16-step granularity - achieves exact non-standard baud rates (e.g., 1.8432 Mbps, 3.6864 Mbps) from common crystal sources. |
| Extended mode detection | Triggered by non-zero values in TXINTLVL, RXINTLVL, FLWCNTH, or FLWCNTL - ensures backward compatibility while enabling advanced features. |
| Independent TX/RX enable control | Software-controlled via EFCR bits - allows asymmetric operation (e.g., RX-only monitoring or TX-only broadcast) without hardware modification. |
Applications
| Industrial Serial Gateway | Embedded Modem Controller |
|---|---|
|
Use Scenario: Connecting PLCs, HMIs, and field sensors over RS-232/RS-485 to Ethernet or CAN backbone. IC Role / Device Role / Timing Role: UART interface bridge with hardware flow control, FIFO buffering, and RS-485 auto-turnaround. Use Value: 128-byte FIFOs reduce host CPU interrupt load by >75% vs. 16-byte UARTs; −40 °C to +85 °C rating ensures reliability in factory environments. |
Use Scenario: Managing dial-up, GPRS, or LTE modems in remote telemetry units and smart meters. IC Role / Device Role / Timing Role: Host-side UART with IrDA support for configuration port, RTS/CTS handshaking, and Xon/Xoff software flow control. Use Value: Dual-character Xon/Xoff detection prevents false flow control triggers; integrated IrDA enables wireless setup without USB cables. |
| Medical Device Communication | Automotive Diagnostic Interface |
|
Use Scenario: Interfacing patient monitors, infusion pumps, and lab analyzers with central nursing stations via isolated serial links. IC Role / Device Role / Timing Role: Isolated UART transceiver with error flag reporting, sleep mode, and programmable baud rate for legacy medical protocols. Use Value: LOWPWR pin reduces standby current to <1 µA; 128-byte FIFOs prevent data loss during host context switches in real-time OS. |
Use Scenario: OBD-II diagnostic adapters and vehicle telematics gateways communicating with ECUs via UART-based UDS or KWP2000. IC Role / Device Role / Timing Role: Robust UART with automatic 9-bit address detection and RS-485 support for multi-ECU bus scanning. Use Value: Hardware-accelerated 9-bit mode eliminates bit-banging overhead; extended temperature range matches under-hood requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C750IBS,151 | Same HVQFN32 package and 128-byte FIFOs, but lacks IrDA encoder/decoder and RS-485 auto-turnaround. | Suitable for pure RS-232/RS-422 systems without infrared or multi-drop bus needs. | Choose SC16C750IBS,151 if IrDA and RS-485 features are unused - lower cost and identical footprint. |
| TI TL16C752BPTR | 32-pin TSSOP package; 64-byte FIFOs; no IrDA; supports 1.8 V to 3.3 V; lacks RS-485 auto-turnaround and programmable prescaler. | Targeted at space-constrained industrial boards where HVQFN32 thermal performance is not required. | Choose TL16C752BPTR only if board layout accommodates TSSOP and 64-byte FIFOs suffice for system latency budget. |
Compared with SC16C750IBS,151 and TL16C752BPTR, the SC16C850IBS,151 uniquely integrates IrDA 1.0, RS-485 auto-turnaround, and 128-byte FIFOs in a thermally optimized HVQFN32 package - making it the sole option for compact, multi-protocol, industrial-grade serial bridges requiring zero external timing or transceiver components.
Availability
SC16C850IBS,151 is available at Aetrix Electronics and suitable for industrial serial gateways, embedded modem controllers, medical device interfaces, automotive diagnostic tools, and RS-485 sensor networks requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SC16C850IBS,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 mixed-signal and interface IC design.
The SC16C850IBS,151 belongs to NXP's high-performance UART product line, engineered specifically for industrial and automotive serial communication systems demanding extended FIFO depth, protocol flexibility (RS-232/422/485/IrDA), and robust operation across −40 °C to +85 °C.
FAQ
What is the maximum data rate supported by the SC16C850IBS,151?
The SC16C850IBS,151 supports up to 5 Mbit/s when driven by an 80 MHz external clock. With a crystal oscillator, its maximum data rate is 1.5 Mbit/s. This performance is enabled by its advanced CMOS process and optimized UART core, making SC16C850IBS,151 suitable for high-speed modem and network interface applications where legacy UARTs fall short.
Does the SC16C850IBS,151 support both Intel and Motorola bus interfaces?
Yes, the SC16C850IBS,151 supports both Intel (16-mode) and Motorola (68-mode) parallel bus interfaces, selected via the 16/68 pin. In 16-mode, it uses IOR/IOW strobes and CS; in 68-mode, it uses R/W and CS. This dual-mode capability ensures SC16C850IBS,151 compatibility with diverse legacy and custom host architectures without redesign.
How does the SC16C850IBS,151 handle RS-485 half-duplex communication?
The SC16C850IBS,151 provides automatic RS-485 driver turn-around with programmable delay via the RS485TIME register, plus 9-bit address detection. This eliminates external timing logic and discrete transceivers. When enabled, SC16C850IBS,151 controls the DE/RE signals internally, ensuring glitch-free bus arbitration - a key advantage over basic UARTs requiring external GPIO or timers.
What IrDA functionality does the SC16C850IBS,151 provide?
The SC16C850IBS,151 integrates a full IrDA 1.0 encoder/decoder supporting up to 115.2 kbit/s, compliant with the IrDA physical layer specification. It handles pulse shaping, encoding (RZI), and decoding internally, removing the need for external IrDA transceivers. This makes SC16C850IBS,151 ideal for wireless configuration ports in medical, industrial, and portable devices.
Can the SC16C850IBS,151 operate in low-power mode, and how is it controlled?
Yes, the SC16C850IBS,151 features a dedicated LOWPWR pin (active HIGH) that immediately places the device into low-power mode: the oscillator shuts down, and host interface pins are isolated. De-asserting LOWPWR triggers an automatic hardware reset. With its 22 kΩ internal pull-down, SC16C850IBS,151 defaults to normal operation when LOWPWR is left unconnected.
SC16C850IBS,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:
- 2.5V ~ 3.3V
- 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)
SC16C850IBS,151 FAQ
1.How can I place an order for SC16C850IBS,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C850IBS,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 SC16C850IBS,151 reliable?
The price and inventory of SC16C850IBS,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C850IBS,151 is usually 5 days.
3.What payment methods are accepted for SC16C850IBS,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C850IBS,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C850IBS,151?
SC16C850IBS,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C850IBS,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 SC16C850IBS,151?
For technical support, including SC16C850IBS,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C850IBS,151 requirements.
6.How does Aetrix verify that SC16C850IBS,151 is sourced from the original manufacturer or authorized distributors?
All SC16C850IBS,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 SC16C850IBS,151 meets industry standards.
7.What is the process for return or replacement of SC16C850IBS,151?
All SC16C850IBS,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C850IBS,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 SC16C850IBS,151 part is unused and in its original packaging.
Return procedure for SC16C850IBS,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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