My Inquiry
My Account
NXP Semiconductors SC16IS741IPW,118
- Part No.:
- SC16IS741IPW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Controllers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SC16IS741IPW,118.pdf
- Description:
- IC UART SGL I2C BUS SPI 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC16IS741IPW,118 from NXP Semiconductors is a single-channel UART bridge IC with I²C-bus or SPI slave interface, 64-byte TX/RX FIFOs, IrDA SIR support, and RS-485 auto-direction control. It operates at up to 5 Mbit/s baud rate, supports 2.5 V/3.3 V supply, and delivers <30 μA sleep current - enabling low-power serial protocol conversion in portable industrial devices.
For engineers reviewing the SC16IS741IPW,118 datasheet, SC16IS741IPW,118 pinout, SC16IS741IPW,118 application, or SC16IS741IPW,118 equivalent, key selection considerations include I²C/SPI interface mode selection, RTS-driven RS-485 driver control, programmable FIFO trigger levels, and 16C450 register compatibility for legacy software porting.
Technical Context
The SC16IS741IPW,118 implements a full-duplex UART core with backward-compatible 16C450 register mapping, supporting both I²C-bus (fast-mode, 400 kbit/s) and SPI (Mode 0, slave-only) host interfaces. Its internal oscillator accepts crystal (XTAL1/XTAL2) or external clock input, feeding a programmable baud rate generator with 16× oversampling and optional divide-by-4 prescaler.
Hardware flow control uses RTS/CTS signals with auto-handshaking enabled via EFR[7:6]; RS-485 direction is managed automatically by RTS assertion/deassertion. Sleep mode activation requires EFR[4] and IER[4] set, and halts UART clocks only when RX is idle, TX FIFO/shift register are empty, and no pending non-THR interrupts exist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Baud Rate | Up to 5 Mbit/s in 16× clock mode - enables high-speed serial links without CPU overhead. |
| FIFO Depth | 64 bytes TX + 64 bytes RX - reduces interrupt frequency and host polling burden in burst data transfers. |
| Supply Voltage | 2.5 V or 3.3 V - supports dual-voltage system integration and low-power battery operation. |
| Sleep Current | <30 μA at 3.3 V - extends battery life in handheld and remote sensor applications. |
| Interface Modes | I²C-bus (400 kbit/s) or SPI (Mode 0, slave) - selectable via I2C/SPI pin; no firmware reconfiguration needed. |
| RS-485 Control | Automatic driver direction via RTS signal - eliminates external logic or GPIO timing constraints. |
| Temperature Range | −40 °C to +95 °C - qualified for industrial automation and factory floor deployment. |
Pinout & Package
TSSOP16 package (SOT403-1), 4.4 mm body width, surface-mount compatible - optimized for space-constrained portable and embedded designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply | 2.5 V or 3.3 V main supply; decoupling required per layout guidelines. |
| CS/A0 (Pin 2) | I²C address select / SPI chip select | Configures I²C base address (with A1) or acts as active-low SPI enable. |
| SI/A1 (Pin 3) | I²C address select / SPI data input | Completes I²C device addressing or receives SPI command/data. |
| SO (Pin 4) | SPI data output | 3-stateable output in SPI mode; undefined (n.c.) in I²C mode. |
| SCL/SCLK (Pin 5) | I²C clock / SPI clock | Shared clock input; Schmitt-triggered for noise immunity on both interfaces. |
| SDA (Pin 6) | I²C bidirectional data | Open-drain I²C bus line; must tie to VSS in SPI configuration. |
| IRQ (Pin 7) | Interrupt output | Active-low open-drain interrupt; requires external pull-up (1 kΩ @ 3.3 V). |
| I2C/SPI (Pin 8) | Interface select | Logic HIGH = I²C mode; LOW = SPI mode - hardwired at power-up. |
| VSS (Pin 9) | Ground | Digital ground reference; separate analog/digital grounding not required. |
| RTS (Pin 10) | UART request-to-send | Drives RS-485 transceiver direction; auto-controlled for hardware flow or RS-485. |
| CTS (Pin 11) | UART clear-to-send | Input for auto CTS flow control; status readable via MSR[4]. |
| TX (Pin 12) | Transmit output | UART serial output; disabled during local loopback mode. |
| RX (Pin 13) | Receive input | UART serial input; disabled during local loopback mode. |
| RESET (Pin 14) | Hardware reset | Active-low asynchronous reset; initializes registers except DLL/DLH/XON/XOFF. |
| XTAL1 (Pin 15) | Clock input | Crystal or external clock input; forms oscillator with XTAL2. |
| XTAL2 (Pin 16) | Clock output | Crystal oscillator output; no external load required in crystal mode. |
Key Features
| Feature | Design Value |
|---|---|
| 16C450 register compatibility | Enables drop-in software reuse from legacy UART platforms without driver rewrite. |
| Auto RS-485 direction control | Eliminates need for external direction-control logic or timing-critical GPIO toggling. |
| Independent TX/RX FIFO enable | Allows selective buffering - e.g., enable RX FIFO for burst reception while disabling TX FIFO for polled transmit. |
| Programmable Xon/Xoff characters | Supports single or dual-character software flow control with configurable detection logic. |
| IrDA SIR encoder/decoder | Integrates infrared physical layer support - avoids external IrDA PHY IC in remote control or medical devices. |
| Software reset capability | Permits full UART reinitialization via register write, independent of hardware RESET pin state. |
Applications
| Industrial PLC Communication | Portable Data Terminal |
|---|---|
Use Scenario: Connecting microcontroller-based PLC modules to RS-485 fieldbus networks for sensor/actuator control. IC Role / Device Role / Timing Role: UART bridge translating SPI commands from MCU into RS-485 frames with automatic driver direction and hardware flow control. Use Value: Reduces BOM count by integrating RS-485 direction logic and eliminating discrete level shifters or flow-control GPIOs. |
Use Scenario: Enabling barcode scanner or RFID reader communication in handheld inventory devices powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power serial interface handling intermittent data bursts between host processor and peripheral over I²C, with deep-sleep current <30 μA. Use Value: Extends operational runtime by minimizing active and quiescent power consumption during idle periods. |
| Cellular Modem Interface | Factory Automation Gateway |
Use Scenario: Interfacing 3G/4G LTE modems requiring AT-command UART to application processors using I²C or SPI buses. IC Role / Device Role / Timing Role: Protocol converter bridging modem's 3.3 V UART to host's I²C-bus, with 64-byte FIFOs absorbing command-response latency spikes. Use Value: Prevents command loss during high-throughput data sessions by decoupling host I²C timing from modem UART timing. |
Use Scenario: Integrating legacy RS-232/RS-485 equipment (e.g., HMIs, motor drives) into modern EtherNet/IP or PROFINET gateways. IC Role / Device Role / Timing Role: Serial interface providing register-level access to host SoC via SPI, supporting multiple concurrent UART sessions through software-managed context switching. Use Value: Enables multi-protocol gateway design with minimal FPGA or ASIC logic - all UART control handled in firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16IS750IPW,118 | Dual-channel UART; identical I²C/SPI interface, same TSSOP16 package, but adds second UART channel and shared IRQ. | Required where two independent serial peripherals must be bridged simultaneously (e.g., modem + GPS). | Select SC16IS750IPW,118 only if dual UART functionality is needed - otherwise SC16IS741IPW,118 offers lower cost and simpler register management. |
| MAX3107EAE+T | Single UART with SPI-only interface (no I²C); 128-byte FIFOs; integrated ±15 kV ESD protection on TX/RX; operates down to 1.71 V. | Better suited for ultra-low-voltage or ESD-critical environments (e.g., medical handhelds), but lacks I²C option and RS-485 auto-direction. | Choose MAX3107EAE+T when ESD robustness or sub-2.5 V operation is mandatory; retain SC16IS741IPW,118 for I²C systems or RS-485 direction automation. |
Compared with SC16IS750IPW,118 and MAX3107EAE+T, the SC16IS741IPW,118 uniquely balances I²C/SPI flexibility, RS-485 driver automation, and 16C450 software compatibility - making it optimal for cost-sensitive, single-peripheral industrial bridges where interface choice and protocol transparency matter most.
Availability
SC16IS741IPW,118 is available at Aetrix Electronics and suitable for factory automation, portable data terminals, and cellular modem interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SC16IS741IPW,118 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 broad IP portfolios in RF, security, and mixed-signal processing.
The SC16IS741IPW,118 belongs to NXP's SC16IS family of intelligent UART bridges, designed specifically to simplify serial peripheral integration in resource-constrained embedded systems using standard I²C or SPI buses.
FAQ
What interface protocols does the SC16IS741IPW,118 support?
The SC16IS741IPW,118 supports two host-side interface protocols: I²C-bus (fast-mode, up to 400 kbit/s) and SPI (Mode 0, slave-only). Interface selection is determined by the logic level on the I2C/SPI pin at power-up - HIGH for I²C, LOW for SPI. Both modes share the same UART register map and functional behavior, allowing hardware-agnostic firmware design.
How does RS-485 driver direction control work on the SC16IS741IPW,118?
The SC16IS741IPW,118 provides automatic RS-485 driver direction control via its RTS pin: RTS goes LOW when the transmitter has data ready and remains LOW until the TX FIFO empties or the RX FIFO nears capacity. This eliminates external direction-control circuitry. Direction inversion is supported via EFR bit, and RTS polarity can be configured to match transceiver requirements.
Does the SC16IS741IPW,118 support software reset, and how is it triggered?
Yes, the SC16IS741IPW,118 supports software reset via the Enhanced Feature Register (EFR). Setting EFR[0] to '1' initiates a full internal reset - clearing most registers (except DLL, DLH, SPR, and XON/XOFF words) and returning the UART to its post-hardware-reset state. This allows runtime recovery without asserting the physical RESET pin, preserving system-level power sequencing.
What is the maximum baud rate achievable with the SC16IS741IPW,118, and what clock source is required?
The SC16IS741IPW,118 achieves up to 5 Mbit/s in 16× clock mode. To reach this, a minimum crystal or external clock frequency of 80 MHz is required (5 Mbit/s × 16 = 80 MHz). With common crystals (e.g., 1.8432 MHz or 3.072 MHz), maximum practical baud rates are 38.4 kbit/s and 57.6 kbit/s respectively - verified in Tables 7 and 8 of the datasheet.
Is the SC16IS741IPW,118 compatible with legacy 16C450 UART software drivers?
Yes, the SC16IS741IPW,118 maintains full register-level compatibility with the industry-standard 16C450 UART. All base registers (RHR, THR, IER, IIR, LCR, MCR, LSR, MSR) map identically, including bit definitions and reset values. This allows existing 16C450 drivers to operate without modification - only minor initialization adjustments (e.g., enabling FIFOs or setting I2C/SPI mode) are needed for full feature utilization.
SC16IS741IPW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Programmable:
- Not Verified
- Protocol:
- RS232, RS485
- Function:
- Controller
- Interface:
- I2C, SPI, UART
- Standards:
- -
- Voltage - Supply:
- 2.5V, 3.3V
- Current - Supply:
- 6mA
- Operating Temperature:
- -40°C ~ 95°C
- Supplier Device Package:
- 16-TSSOP
- Grade:
- -
- Qualification:
- -
SC16IS741IPW,118 FAQ
1.How can I place an order for SC16IS741IPW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16IS741IPW,118 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 SC16IS741IPW,118 reliable?
The price and inventory of SC16IS741IPW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16IS741IPW,118 is usually 5 days.
3.What payment methods are accepted for SC16IS741IPW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16IS741IPW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16IS741IPW,118?
SC16IS741IPW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16IS741IPW,118 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 SC16IS741IPW,118?
For technical support, including SC16IS741IPW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16IS741IPW,118 requirements.
6.How does Aetrix verify that SC16IS741IPW,118 is sourced from the original manufacturer or authorized distributors?
All SC16IS741IPW,118 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 SC16IS741IPW,118 meets industry standards.
7.What is the process for return or replacement of SC16IS741IPW,118?
All SC16IS741IPW,118 units undergo pre-shipment inspection (PSI). If there is an issue with SC16IS741IPW,118, 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 SC16IS741IPW,118 part is unused and in its original packaging.
Return procedure for SC16IS741IPW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16IS741IPW,118 Tags
-
PTN5150AHXMP
NXP Semiconductors
-
USB3740B-AI9-TR
Microchip Technology
-
USB3740B-AI2-TR
Microchip Technology
-
USB3300-EZK-TR
Microchip Technology
-
USB3300-EZK
Microchip Technology
-
FUSB340TMX
onsemi
-
FUSB302BMPX
onsemi
-
DP83826IRHBR
Texas Instruments
-
MCP2518FDT-E/QBB
Microchip Technology
-
FUSB302MPX
onsemi
-
MCP2518FDT-E/SL
Microchip Technology
-
FT260Q-R
FTDI, Future Technology Devices International Ltd
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
