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NXP Semiconductors SC16C850LIBS,157
- Part No.:
- SC16C850LIBS,157
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16C850LIBS,157.pdf
- Description:
- IC UART SINGLE W/FIFO 32-HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
SC16C850LIBS,157 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, Intel/Motorola bus interface selectability, and support for up to 5 Mbit/s serial data rates. It serves as a high-performance serial interface bridge in embedded industrial controllers requiring low-power, high-throughput asynchronous communication.
For engineers reviewing the SC16C850LIBS,157 datasheet, SC16C850LIBS,157 pinout, SC16C850LIBS,157 application, or SC16C850LIBS,157 equivalent, key selection considerations include 128-byte FIFO programmability, 1.8 V operation with industrial temperature range (−40 °C to +85 °C), RS-485 driver turn-around timing control, automatic hardware/software flow control, and HVQFN32 package compatibility with space-constrained PCB layouts.
Technical Context
The SC16C850LIBS,157 implements a dual-mode parallel host interface-Intel 16-bit (IOW/IOR) or Motorola 68k (R/W)-selected via the 16/68 pin. Its UART core supports extended mode enabling full 128-level FIFO interrupt trigger programming and RS-485 address detection with programmable driver turn-around delay.
Internal register architecture includes three distinct access modes: general registers (THR/RHR, IER/ISR, MCR/MSR), baud rate divisor latches (DLL/DLM), and enhanced feature sets (EFR, TXINTLVL/RXINTLVL, FLWCNTH/FLWCNTL). The device integrates IrDA 1.0 physical layer encoding/decoding and a high-resolution clock prescaler (0–15, 1/16-step granularity) for non-standard clock sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V nominal; enables ultra-low-power operation in battery-backed or energy-sensitive embedded systems |
| Max Data Rate | 5 Mbit/s with 80 MHz external clock; supports high-speed modem and shared-network interfaces |
| FIFO Depth | 128-byte TX and RX FIFOs; reduces CPU interrupt load and improves throughput in multi-tasking environments |
| Bus Interface | Selectable Intel 16-mode or Motorola 68-mode; eliminates need for external bus translators in mixed-architecture designs |
| IrDA Support | IrDA 1.0 compliant (≤115.2 kbit/s); provides integrated infrared physical layer without external transceiver |
| Operating Temp | −40 °C to +85 °C; qualified for industrial automation, transportation, and outdoor equipment deployments |
| RS-485 Mode | Automatic address detection and programmable driver turn-around delay; simplifies half-duplex bus implementation |
Pinout & Package
HVQFN32 (SOT617-1) package: 5 mm × 5 mm × 0.85 mm body, thermally enhanced exposed pad, leadless construction optimized for high-density routing and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TX | Transmit Output | Serial data output; logic-high idle state; compatible with RS-232 level shifters or direct CMOS interfacing |
| RX | Receive Input | Serial data input; logic-high idle state; supports local loopback for self-test without external wiring |
| CS | Chip Select | Active-low enable for register access; decodes UART address space in 16/68 mode configurations |
| IOW / R/W | Write Strobe (16-mode) or Read/Write Control (68-mode) | Dual-function pin enabling seamless integration with Intel or Motorola-style microcontrollers without glue logic |
| IOR | Read Strobe (16-mode) | Active-low read signal; unused in 68-mode and must be tied to VDD |
| INT / IRQ | Interrupt Output | Configurable active-HIGH (16-mode) or open-drain active-LOW (68-mode); supports shared interrupt lines |
| LOWPWR | Low-Power Enable | Active-HIGH entry into sleep mode; shuts down oscillator and isolates host bus pins to reduce system standby current |
| RESET | Reset Input | Active-HIGH in 16-mode; active-LOW in 68-mode; synchronizes internal registers and FIFOs to known state |
| XTAL1 / XTAL2 | Clock Input / Oscillator Output | Supports crystal (≤1.5 Mbit/s) or external clock (≤80 MHz → 5 Mbit/s); enables precise baud rate generation |
| CTS / RTS / DTR / DSR / CD / RI | Modem Control Signals | Full standard modem handshaking; software-configurable polarity and interrupt generation per status change |
Key Features
| Feature | Design Value |
|---|---|
| 128-level programmable FIFO triggers | Enables fine-grained interrupt scheduling and optimal CPU bandwidth allocation in real-time OS environments |
| Automatic RS-485 driver turn-around | Eliminates external timing circuitry; configurable delay ensures reliable half-duplex bus arbitration |
| High-resolution clock prescaler (1/16-step) | Permits accurate non-standard baud rates (e.g., 1.8432 MHz crystal → 921.6 kbit/s) without external PLL |
| IrDA 1.0 encoder/decoder | Integrates infrared physical layer; removes need for discrete IrDA transceiver IC and associated passives |
| Independent TX/RX enable control | Allows selective shutdown of transmit or receive path to conserve power during asymmetric communication bursts |
Applications
| Industrial PLC Serial Gateway | Medical Device Data Logger |
|---|---|
Use Scenario: Connecting legacy RS-485 fieldbus sensors to a modern ARM-based controller via isolated UART interface. IC Role / Device Role / Timing Role: UART bridging and protocol translation; handles RS-485 half-duplex timing, address filtering, and FIFO buffering. Use Value: 128-byte FIFOs prevent data loss during burst sensor reads; automatic RS-485 turn-around ensures deterministic bus turnaround within 1 µs. | Use Scenario: Capturing patient vitals from analog front-end ADCs and transmitting over IR to bedside monitor. IC Role / Device Role / Timing Role: Serial-to-infrared conversion; manages IrDA 1.0 pulse modulation and demodulation at 115.2 kbit/s. Use Value: Integrated IrDA encoder/decoder eliminates external transceiver; 1.8 V operation extends battery life in portable diagnostic tools. |
| Smart Energy Meter Communication | Automotive Telematics ECU |
Use Scenario: Enabling two-way DLMS/COSEM meter communication over GPRS modem using RTS/CTS flow control. IC Role / Device Role / Timing Role: High-reliability UART with hardware flow control; manages modem handshake and large packet transfers. Use Value: Programmable CTS/RTS trigger levels prevent modem buffer overflow; 128-byte FIFOs accommodate variable-length DLMS frames. | Use Scenario: Interfacing GPS module and cellular modem to vehicle infotainment MCU under tight EMI constraints. IC Role / Device Role / Timing Role: Low-noise, low-power serial interface; operates at 1.8 V to match advanced SoC I/O voltage domains. Use Value: Industrial temp rating (−40 °C to +85 °C) ensures reliability in under-hood environments; HVQFN32 footprint minimizes board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C750IBS,157 | Same 1.8 V HVQFN32 package and 128-byte FIFOs, but lacks IrDA encoder/decoder and RS-485 turn-around timer | Suitable where infrared or RS-485 features are not required; lower gate count and cost | Select when IrDA and RS-485 support are unnecessary and BOM cost optimization is prioritized |
| TL16C750CPTR | 3.3 V operation, TSSOP-48 package, 64-byte FIFOs, no IrDA or RS-485 enhancements | Requires level-shifting for 1.8 V systems; limited to legacy 3.3 V industrial designs | Choose only for drop-in replacement in existing 3.3 V designs with no requirement for extended FIFO or low-voltage operation |
Compared with SC16C750IBS,157, the SC16C850LIBS,157 adds IrDA and RS-485 capabilities at identical voltage and package; versus TL16C750CPTR, it delivers 2× FIFO depth, 1.8 V compatibility, and modern feature set-but requires redesign for voltage and footprint.
Availability
SC16C850LIBS,157 is available at Aetrix Electronics and suitable for industrial PLC gateways, medical data loggers, smart energy meters, and automotive telematics ECUs requiring stable component supply across long production lifecycles.
Supply support for SC16C850LIBS,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.
The SC16C850LIBS,157 belongs to NXP's high-performance UART product line, designed specifically for low-voltage, high-throughput serial communication in space- and power-constrained embedded systems.
FAQ
What is the maximum serial data rate supported by the SC16C850LIBS,157?
The SC16C850LIBS,157 supports up to 5 Mbit/s serial data rates when driven by an 80 MHz external clock source. With an onboard crystal oscillator, the maximum achievable rate is 1.5 Mbit/s. This performance is enabled by its advanced baud rate generator and 128-byte FIFO architecture, which together minimize CPU overhead during high-speed transfers - a capability confirmed in Section 1 and Table 6 of the official NXP datasheet for SC16C850LIBS,157.
Does the SC16C850LIBS,157 support both Intel and Motorola bus interfaces?
Yes, the SC16C850LIBS,157 supports both Intel 16-mode (using IOW/IOR strobes) and Motorola 68-mode (using R/W control) via the 16/68 pin. When this pin is logic HIGH or unconnected (internally pulled up), the device operates in Intel mode; when logic LOW, it switches to Motorola mode. This dual-interface capability is explicitly documented in Section 5.2 Pin Description and Figure 5 of the SC16C850LIBS,157 datasheet.
How does the SC16C850LIBS,157 handle RS-485 half-duplex communication?
The SC16C850LIBS,157 provides automatic RS-485 driver turn-around with programmable delay via the RS485TIME register. It also supports automatic 9-bit address detection to filter target node traffic. These features eliminate external timing logic and simplify firmware - as detailed in Sections 6.5 and 6.10 of the SC16C850LIBS,157 datasheet - making it ideal for robust industrial bus implementations.
What is the function of the LOWPWR pin on the SC16C850LIBS,157?
The LOWPWR pin on the SC16C850LIBS,157 is an active-HIGH input that places the device into low-power mode: the oscillator halts, and host interface pins are electrically isolated to reduce system standby current. Upon de-assertion (falling edge), the device performs an automatic hardware reset. This behavior is defined in Section 5.2 and Section 6.12 of the SC16C850LIBS,157 datasheet and requires no software initialization.
Can the SC16C850LIBS,157 operate with non-standard UART clock frequencies?
Yes, the SC16C850LIBS,157 includes a high-resolution clock prescaler with 16 selectable values (0–15) and 1/16-step granularity, allowing precise baud rate generation from arbitrary clock sources - including crystals or oscillators not aligned to standard UART reference frequencies. This capability is specified in Section 6.9 of the SC16C850LIBS,157 datasheet and enables flexible system clock tree design.
SC16C850LIBS,157 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,157 FAQ
1.How can I place an order for SC16C850LIBS,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C850LIBS,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 SC16C850LIBS,157 reliable?
The price and inventory of SC16C850LIBS,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C850LIBS,157 is usually 5 days.
3.What payment methods are accepted for SC16C850LIBS,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C850LIBS,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C850LIBS,157?
SC16C850LIBS,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C850LIBS,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 SC16C850LIBS,157?
For technical support, including SC16C850LIBS,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C850LIBS,157 requirements.
6.How does Aetrix verify that SC16C850LIBS,157 is sourced from the original manufacturer or authorized distributors?
All SC16C850LIBS,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 SC16C850LIBS,157 meets industry standards.
7.What is the process for return or replacement of SC16C850LIBS,157?
All SC16C850LIBS,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C850LIBS,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 SC16C850LIBS,157 part is unused and in its original packaging.
Return procedure for SC16C850LIBS,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C850LIBS,157 Tags
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SC16IS741AIPWJ
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