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NXP Semiconductors SC16C852LIBS,157
- Part No.:
- SC16C852LIBS,157
- Manufacturer:
- NXP Semiconductors
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
SC16C852LIBS,157.pdf
- Description:
- IC UART DUAL W/FIFO 32-HVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,503
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Product details
Overview
SC16C852LIBS,157 from NXP Semiconductors is a 1.8 V dual-channel UART IC supporting up to 5 Mbit/s serial data rates, featuring 128-byte transmit/receive FIFOs, IrDA 1.0 encoder/decoder, and selectable Intel (16-mode) or Motorola (68-mode) bus interface. It operates across −40 °C to +85 °C and targets high-throughput industrial serial gateways and embedded communication controllers.
For engineers reviewing the SC16C852LIBS,157 datasheet, SC16C852LIBS,157 pinout, SC16C852LIBS,157 application, or SC16C852LIBS,157 equivalent, key selection considerations include dual-channel concurrent write capability, programmable RS-485 driver turn-around delay, DMA-ready TXRDY/RXRDY signaling, and 128-level FIFO interrupt trigger granularity in extended mode.
Technical Context
The SC16C852LIBS,157 implements two independent UART channels with fully separate register sets, baud rate generators, and modem control logic. Each channel supports automatic hardware flow control (RTS/CTS), software Xon/Xoff, and 9-bit address detection for RS-485 multidrop networks.
Its dual-bus architecture allows runtime selection between 16-mode (Intel-style IOR/IOW strobes) and 68-mode (Motorola-style R/W) via the 16/68 pin. Internal loopback mode enables on-chip diagnostics without external wiring, and LOWPWR pin activation disables the oscillator and isolates host bus pins to reduce active power consumption.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8 V nominal - enables direct interfacing with low-voltage SoCs and FPGAs without level-shifting. |
| Max Data Rate | 5 Mbit/s - achievable with 80 MHz external clock; supports high-speed modem and industrial fieldbus links. |
| FIFO Depth | 128-byte TX/RX per channel - reduces CPU interrupt load and enables burst transfers in DMA mode. |
| IrDA Support | Version 1.0 at ≤115.2 kbit/s - integrated encoder/decoder eliminates external transceiver components. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial automation, transportation, and outdoor equipment. |
| Bus Interface | Selectable Intel 16-mode or Motorola 68-mode - ensures compatibility with legacy and modern microcontroller buses. |
| RS-485 Features | Automatic driver turn-around with programmable delay and 9-bit address detection - simplifies half-duplex multidrop network implementation. |
Pinout & Package
SC16C852LIBS,157 is packaged in HVQFN32 (SOT617-1): plastic thermal-enhanced very thin quad flat package, 5 mm × 5 mm × 0.85 mm body, 32 terminals, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Address select inputs | Decode internal register addresses for both UART channels in 16-mode; A3 added in 68-mode via CSB pin. |
| CSA / CSB | Chip select inputs | In 16-mode: independent selects for Channel A/B; in 68-mode: CS becomes unified chip select, CSB repurposed as A3. |
| TXA / TXB, RXA / RXB | Serial I/O | Dual independent full-duplex UART I/O pairs - enable simultaneous asynchronous communication on two physical ports. |
| TXRDYA / TXRDYB, RXRDYA / RXRDYB | DMA status outputs | Active-low ready signals synchronized to FIFO fill levels - directly drive DMA controller handshaking without software polling. |
| 16/68 | Bus mode select | Hardware-configured interface mode - determines strobe polarity, address decoding, and control signal mapping at power-up. |
| LOWPWR | Power-down control | Active-high entry into low-power state: disables oscillator and isolates I/O pins - reduces quiescent current during idle periods. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel concurrent write | Enables simultaneous register access to both UART channels without arbitration delay - critical for time-sensitive protocol stacks. |
| 128 programmable FIFO trigger levels | Permits fine-grained interrupt scheduling and DMA buffer management - avoids overruns in variable-latency systems. |
| Automatic RS-485 turn-around | Hardware-controlled driver enable timing with user-defined delay - eliminates software timing jitter in half-duplex bus applications. |
| Independent TX/RX baud rate generators | Allows asymmetric communication (e.g., different speeds on transmit vs. receive) - supports legacy modem negotiation and echo cancellation. |
| Enhanced Sleep mode | Reduces supply current below 10 µA while retaining register state - extends battery life in portable diagnostic tools. |
Applications
| Industrial Serial Gateway | Embedded Modem Interface |
|---|---|
Use Scenario: Aggregating data from multiple RS-485 field devices (PLCs, sensors) into a single Ethernet or CAN backbone. IC Role / Device Role / Timing Role: Dual UART acts as bidirectional protocol bridge with automatic RS-485 driver control and hardware flow management. Use Value: Eliminates need for discrete level shifters and timing-critical GPIO toggling; 128-byte FIFOs absorb burst traffic from noisy industrial lines. | Use Scenario: Connecting an embedded processor to a V.34/V.92 analog modem via standard AT command interface. IC Role / Device Role / Timing Role: UART provides synchronous framing, parity checking, and RTS/CTS handshaking at up to 5 Mbit/s line rates. Use Value: High-speed FIFO buffering prevents command loss during modem initialization; IrDA support enables optional infrared diagnostics. |
| Medical Device Communication Hub | Transportation Telematics Unit |
Use Scenario: Interfacing ECG monitors, infusion pumps, and patient monitors to a central clinical data server via isolated RS-232/422 links. IC Role / Device Role / Timing Role: Dual UART handles concurrent diagnostic logging and real-time alarm forwarding with independent baud rate control. Use Value: 1.8 V operation matches low-power medical SoCs; −40 °C to +85 °C rating ensures reliability in mobile cart environments. | Use Scenario: Enabling GPS, cellular, and vehicle CAN bus telemetry in fleet management hardware operating under wide ambient temperature swings. IC Role / Device Role / Timing Role: UART manages simultaneous NMEA 0183 GPS stream and AT-command-based LTE modem control. Use Value: Hardware flow control prevents packet loss during RF handover; LOWPWR mode extends battery backup duration during ignition-off states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C752IBS,157 | 32-byte FIFOs (vs. 128-byte), no IrDA, same 1.8 V/5 Mbit/s spec | Limited buffer depth reduces suitability for high-latency or bursty industrial protocols | Choose when cost sensitivity outweighs FIFO depth requirements and IrDA is unused |
| TL16C752CPTR | 3.3 V supply, 5 Mbit/s, 64-byte FIFOs, no RS-485 auto-turnaround | Requires level-shifting for 1.8 V hosts; lacks integrated RS-485 timing control | Prefer only if existing 3.3 V design infrastructure prohibits voltage translation |
Compared with SC16C752IBS,157 and TL16C752CPTR, the SC16C852LIBS,157 delivers superior buffer headroom for deterministic latency control, native IrDA PHY integration, and hardware-managed RS-485 timing - making it optimal for new designs requiring robust serial bridging in space- and power-constrained industrial systems.
Availability
SC16C852LIBS,157 is available at Aetrix Electronics and suitable for industrial serial gateways, embedded modem interfaces, and medical device communication hubs requiring stable component supply and long-term lifecycle assurance.
Supply support for SC16C852LIBS,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 SC16C852LIBS,157 belongs to NXP's high-performance UART product line, designed specifically for low-voltage, multi-protocol serial bridging in resource-constrained embedded systems demanding deterministic latency and industrial-grade reliability.
FAQ
What bus interface modes does the SC16C852LIBS,157 support?
The SC16C852LIBS,157 supports both Intel-style 16-mode (using IOR/IOW strobes) and Motorola-style 68-mode (using R/W strobe) via the hardware-selectable 16/68 pin. Configuration is fixed at power-up and cannot be changed dynamically. In 16-mode, CSA/CSB provide independent channel selection; in 68-mode, CS serves as unified chip select and CSB becomes A3 for channel addressing. This dual-mode flexibility allows seamless integration with diverse microcontroller families without redesigning the host interface logic.
How does the SC16C852LIBS,157 handle RS-485 half-duplex operation?
The SC16C852LIBS,157 implements hardware-controlled RS-485 driver turn-around with a user-programmable delay register (RS485TIME). When enabled, the UART automatically asserts the driver-enable signal (mapped to RTS or DTR) before transmission and de-asserts it after the final stop bit, inserting precisely configured dead time to prevent bus contention. This eliminates software timing loops and ensures reliable operation across varying cable lengths and data rates - a critical advantage over generic UARTs requiring external GPIO control.
What is the function of the LOWPWR pin on the SC16C852LIBS,157?
The LOWPWR pin on the SC16C852LIBS,157 is an active-high input that places the device into a low-power state: the internal oscillator halts, and host bus interface pins (D0–D7, A0–A2, IOR/IOW or R/W, CSA/CSB or CS) are electrically isolated. The device remains in this state until LOWPWR is de-asserted, at which point it performs an automatic hardware reset - restoring all registers to default values. An internal pull-down resistor allows the pin to be left unconnected for normal operation, simplifying board layout in always-on applications.
Can the SC16C852LIBS,157 operate with non-standard baud rates?
Yes, the SC16C852LIBS,157 supports non-standard baud rates via its high-resolution clock prescaler (CLKPRES register), which offers 16 fractional steps (0 to 15) with 1/16 granularity. This allows precise division of arbitrary input clocks (e.g., 24.576 MHz, 40 MHz) to generate uncommon rates like 312.5 kbit/s for Profibus or 1.25 Mbit/s for custom protocols - without requiring crystal changes or external PLLs. The prescaler works in conjunction with the standard DLL/DLM divisor latches for full flexibility.
Is the SC16C852LIBS,157 pin-compatible with earlier NXP UARTs?
The SC16C852LIBS,157 is pin-, function-, and software-compatible with the SC16C652B *only in the LQFP48 package*. However, the SC16C852LIBS,157 uses the HVQFN32 package (SOT617-1), which has a distinct pinout, smaller footprint, and exposed thermal pad. Therefore, direct PCB replacement is not possible without layout revision. For drop-in upgrades in LQFP48 designs, the SC16C852LIB (not SC16C852LIBS,157) must be selected - confirming that package identity is essential when evaluating compatibility.
SC16C852LIBS,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:
- 2, DUART
- 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)
SC16C852LIBS,157 FAQ
1.How can I place an order for SC16C852LIBS,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C852LIBS,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 SC16C852LIBS,157 reliable?
The price and inventory of SC16C852LIBS,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C852LIBS,157 is usually 5 days.
3.What payment methods are accepted for SC16C852LIBS,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C852LIBS,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C852LIBS,157?
SC16C852LIBS,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C852LIBS,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 SC16C852LIBS,157?
For technical support, including SC16C852LIBS,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C852LIBS,157 requirements.
6.How does Aetrix verify that SC16C852LIBS,157 is sourced from the original manufacturer or authorized distributors?
All SC16C852LIBS,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 SC16C852LIBS,157 meets industry standards.
7.What is the process for return or replacement of SC16C852LIBS,157?
All SC16C852LIBS,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C852LIBS,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 SC16C852LIBS,157 part is unused and in its original packaging.
Return procedure for SC16C852LIBS,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C852LIBS,157 Tags
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SC16IS741AIPWJ
NXP Semiconductors
-
TL16C550CPTR
Texas Instruments
-
TL16C550CIPTR
Texas Instruments
-
SC16C752BIB48,128
NXP Semiconductors
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