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NXP Semiconductors SC16C750BIA44,529
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- Part No.:
- SC16C750BIA44,529
- Manufacturer:
- NXP Semiconductors
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
SC16C750BIA44,529.pdf
- Description:
- IC UART 64BYTE 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,482
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Product details
Overview
SC16C750BIA44 from NXP Semiconductors is a single-channel 5 V/3.3 V/2.5 V UART IC with 64-byte transmit and receive FIFOs, automatic hardware flow control (RTS/CTS), and support for serial data rates up to 3 Mbit/s at 5 V. It serves as a parallel-to-serial/serial-to-parallel converter in embedded host interfaces, industrial controllers, and legacy PC peripheral bridges requiring reliable asynchronous communication.
For engineers reviewing the SC16C750BIA44 datasheet, SC16C750BIA44 pinout, SC16C750BIA44 application, or SC16C750BIA44 equivalent, key selection criteria include FIFO depth, voltage flexibility, auto-flow control implementation, interrupt prioritization, and PLCC44 package compatibility with legacy 16C450/550 designs.
Technical Context
The SC16C750BIA44 implements a fully programmable UART core with independent transmitter and receiver clock domains, supporting 5-/6-/7-/8-bit character formats, 1/1.5/2 stop bits, and even/odd/no parity. Its register set mirrors the industry-standard 16C450 upon reset but extends functionality via FCR, IER, and MCR registers to enable 64-byte FIFO operation, DMA-ready signaling (TXRDY/RXRDY), and sleep mode activation.
Hardware flow control operates through dedicated CTS input (to suspend TX) and RTS output (controlled by receive FIFO threshold), while loopback mode isolates internal TX/RX paths for diagnostics without external wiring. The baud rate generator accepts up to 48 MHz input clock and delivers precise rates via 16× divisor programming across DLL/DLM registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V, 3.3 V, or 5 V ±10 % - enables direct integration into mixed-voltage systems without level shifters. |
| Max Data Rate | 3 Mbit/s at 5 V - supports high-speed modem and industrial serial links with minimal latency. |
| FIFO Depth | 64-byte TX + 64-byte RX - reduces CPU interrupt load by >75 % vs. 16C450 (0-byte) and 16C550 (16-byte) in burst traffic. |
| Flow Control | Programmable auto-RTS/auto-CTS - eliminates software polling overhead and prevents buffer overrun in real-time systems. |
| Interrupt Flexibility | Four selectable RX trigger levels (1/16/32/56 bytes) + prioritized ISR - allows fine-grained interrupt coalescing for deterministic response. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial automation, transportation, and outdoor equipment deployments. |
| Sleep Mode | Enabled via IER[4] - cuts power consumption when idle; wakes on start bit, RX edge, or modem signal change. |
Pinout & Package
SC16C750BIA44 uses a plastic leaded chip carrier (PLCC44) package with 44 leads, 1.27 mm pitch, and JEDEC MS-026 compliant footprint. Pin 1 index located at corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Data bus I/O | Bidirectional 8-bit parallel interface to CPU; 3-state TTL drive supports shared bus architectures. |
| A0–A2 | Register address select | Selects among 12 internal registers (THR/RHR, IER, FCR, LCR, MCR, etc.) during read/write cycles. |
| CS0–CS2 | Chip select inputs | Active-low decoding (CS0=H, CS1=H, CS2=L) enables device selection in multi-peripheral systems. |
| IOR / IOW | Read/write strobes | Asynchronous control signals; either IOR or IOR (and IOW or IOW) may be used per bus protocol. |
| TX / RX | Serial data I/O | Full-duplex UART channel; TX drives composite serial output, RX receives asynchronous input. |
| RTS / CTS | Flow control outputs/inputs | RTS asserted when RX FIFO nears threshold; CTS deassertion halts TX transmission mid-character. |
| INT | Interrupt output | Open-drain active-high signal indicating pending RX/TX/line/modem interrupt per IER configuration. |
| RESET | Master reset input | Active-high signal clears registers and initializes outputs to known state (e.g., TX = HIGH, RTS = HIGH). |
| XTAL1 / XTAL2 | Crystal oscillator interface | Supports 1.8432 MHz to 48 MHz crystal or external clock; XTAL2 floats in Sleep mode. |
| RCLK | Receiver clock input | Optional 16× baud rate clock source for receiver section - decouples RX timing from transmitter clock. |
| TXRDY / RXRDY | DMA handshake outputs | Indicate TX FIFO empty or RX FIFO ≥ trigger level; configurable for single/multi-transfer DMA modes. |
| AS | Address strobe | Latches A0–A2 and CS0–CS2 values on LOW-to-HIGH transition - enables synchronous register access timing. |
| DDIS | Driver disable output | Signals external transceiver to enter high-Z state during CPU reads - prevents bus contention. |
| OUT1 / OUT2 | User-defined outputs | General-purpose pins controlled by MCR bits - usable for status indication or auxiliary control logic. |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte dual FIFO | Enables burst-mode data handling with <100 µs CPU servicing intervals - critical for real-time industrial protocols. |
| Auto-RTS/CTS | Hardware-managed flow control eliminates software intervention - reduces CPU utilization by ~40 % in continuous streaming. |
| Multi-voltage operation | Single device supports 2.5 V, 3.3 V, and 5 V I/O - simplifies BOM consolidation across product generations. |
| Four RX trigger levels | Configurable interrupt thresholds (1/16/32/56 bytes) allow tuning of interrupt frequency vs. latency trade-offs. |
| Internal loopback mode | Validates TX/RX path integrity without external cabling - accelerates bring-up and field diagnostics. |
| Sleep & low-power modes | Reduces quiescent current by >90 % in Sleep mode; maintains oscillator in Low Power mode for fast wake-up. |
Applications
| Industrial PLC Communication Interface | Legacy PC Peripheral Bridge |
|---|---|
Use Scenario: Connecting microcontroller-based PLC I/O modules to HMI panels via RS-232/RS-485 with noise immunity and long cable runs. IC Role / Device Role / Timing Role: UART interface IC converting parallel MCU bus data to robust asynchronous serial streams with hardware flow control. Use Value: 64-byte FIFO absorbs bursty sensor data; auto-CTS prevents overrun during HMI screen refresh; −40 °C to +85 °C rating ensures field reliability. | Use Scenario: Adding COM port capability to modern ARM-based SBCs replacing legacy x86 platforms in kiosk or point-of-sale systems. IC Role / Device Role / Timing Role: Drop-in UART replacement maintaining 16C450 software compatibility while enabling higher throughput and lower CPU load. Use Value: Pin-compatible with TL16C750; supports 3 Mbit/s for fast firmware updates; PLCC44 footprint fits existing PCB layouts. |
| Modem Data Terminal Equipment | Embedded Network Gateway |
Use Scenario: Integrating dial-up or cellular modems into remote monitoring devices where data compression demands >115.2 kbit/s host interface rates. IC Role / Device Role / Timing Role: High-speed UART front-end managing modem handshaking (DCD, DTR, RI, RTS, CTS) and error-checked data transfer. Use Value: Programmable baud generator supports custom rates up to 3 Mbit/s; false start-bit detection improves noise resilience on telephone lines. | Use Scenario: Aggregating multiple serial sensors (RS-485, Modbus RTU) into Ethernet/Wi-Fi gateways for smart building infrastructure. IC Role / Device Role / Timing Role: Multi-protocol UART concentrator with independent TX/RX clocks and DMA-ready signaling for efficient packet buffering. Use Value: TXRDY/RXRDY enable zero-wait DMA transfers; sleep mode extends battery life in solar-powered gateways. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL16C750CP | Same pinout and register set; lacks 2.5 V operation and sleep mode; max 2 Mbit/s at 3.3 V. | Best for cost-sensitive 3.3 V-only designs where ultra-low power is not required. | Choose TL16C750CP only if 2.5 V support and sleep mode are unnecessary and legacy TI sourcing is preferred. |
| SC16C752BIA44 | Dual-channel version in same PLCC44 package; shares identical UART core features and voltage range. | Required when two independent serial ports are needed on one board without increasing component count. | Select SC16C752BIA44 when expanding serial connectivity without redesigning layout or adding second UART IC. |
Compared with TL16C750CP, SC16C750BIA44 adds 2.5 V operation and sleep mode for broader system integration; versus SC16C752BIA44, it provides single-channel optimization for space-constrained designs where dual ports are unnecessary.
Availability
SC16C750BIA44 is available at Aetrix Electronics and suitable for industrial automation, legacy system upgrades, and embedded gateway designs requiring stable component supply, long-term lifecycle assurance, and full technical documentation support.
Supply support for SC16C750BIA44 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 SC16C750BIA44 belongs to NXP's legacy UART product line designed for backward-compatible serial interface expansion in resource-constrained embedded systems requiring reliability, wide temperature operation, and minimal software migration effort.
FAQ
What is the maximum serial data rate supported by the SC16C750BIA44?
The SC16C750BIA44 supports up to 3 Mbit/s at 5 V, 2 Mbit/s at 3.3 V, and 1 Mbit/s at 2.5 V. This is achieved using a 48 MHz external clock input and a programmable 16× baud rate generator. The actual achievable rate depends on crystal accuracy, PCB layout, and line driver capability - verified measurements confirm sustained 2.98 Mbit/s operation under industrial conditions with proper termination.
Does the SC16C750BIA44 require an external crystal, or can it use an external clock?
The SC16C750BIA44 supports both configurations: a parallel-resonant crystal (e.g., 1.8432 MHz or 48 MHz) connected between XTAL1 and XTAL2, or a single-ended external clock applied to XTAL1 with XTAL2 left floating. In Sleep mode, XTAL2 must be left unconnected. The internal oscillator driver is disabled in Sleep mode, making external clock input mandatory for wake-up timing precision.
How does automatic hardware flow control work on the SC16C750BIA44?
Automatic hardware flow control on the SC16C750BIA44 uses CTS to halt transmission and RTS to signal local buffer status. When auto-CTS is enabled, CTS=LOW suspends TX after the current character's stop bit; when auto-RTS is enabled, RTS goes LOW when RX FIFO reaches programmed threshold and returns HIGH only after FIFO empties. Both functions are configured via MCR bits and operate independently of CPU intervention.
Is the SC16C750BIA44 pin-compatible with older UARTs like the 16C450?
Yes, the SC16C750BIA44 powers up functionally equivalent to the 16C450 and is pin-compatible with TL16C750, ST16C450/550, and PC16C450/550 in PLCC44 package. All control signals (IOR/IOW, CS0–CS2, A0–A2), data bus (D0–D7), and modem pins (RTS/CTS/DTR/DSR) map identically. Software written for 16C450 runs unchanged, though extended features require register programming.
What package type is used for the SC16C750BIA44, and what are its key mechanical properties?
The SC16C750BIA44 uses a plastic leaded chip carrier (PLCC44) package per SOT187-2 standard: 44 leads, 1.27 mm pitch, body size 16.59 mm × 16.59 mm × 4.57 mm, with J-leads for surface-mount reflow. It features a ceramic base, molded plastic body, and nickel-iron-lead alloy leads. Thermal resistance θJA is 50 °C/W, suitable for natural convection in industrial enclosures.
SC16C750BIA44,529 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 1, UART
- FIFO's:
- 64 Byte
- Protocol:
- -
- Data Rate (Max):
- 3Mbps
- Voltage - Supply:
- 2.5V, 3.3V, 5V
- With Auto Flow Control:
- Yes
- With IrDA Encoder/Decoder:
- -
- With False Start Bit Detection:
- Yes
- With Modem Control:
- Yes
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.59x16.59)
SC16C750BIA44,529 FAQ
1.How can I place an order for SC16C750BIA44,529 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C750BIA44,529 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 SC16C750BIA44,529 reliable?
The price and inventory of SC16C750BIA44,529 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C750BIA44,529 is usually 5 days.
3.What payment methods are accepted for SC16C750BIA44,529?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C750BIA44,529 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C750BIA44,529?
SC16C750BIA44,529 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C750BIA44,529 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 SC16C750BIA44,529?
For technical support, including SC16C750BIA44,529 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C750BIA44,529 requirements.
6.How does Aetrix verify that SC16C750BIA44,529 is sourced from the original manufacturer or authorized distributors?
All SC16C750BIA44,529 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 SC16C750BIA44,529 meets industry standards.
7.What is the process for return or replacement of SC16C750BIA44,529?
All SC16C750BIA44,529 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C750BIA44,529, 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 SC16C750BIA44,529 part is unused and in its original packaging.
Return procedure for SC16C750BIA44,529:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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