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NXP Semiconductors SC16C650BIB48,151
- Part No.:
- SC16C650BIB48,151
- Manufacturer:
- NXP Semiconductors
- Package:
- 48-LQFP
- Datasheet:
-
SC16C650BIB48,151.pdf
- Description:
- IC UART SINGLE W/FIFO 48-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,750
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Product details
Overview
SC16C650BIB48 from NXP Semiconductors (formerly Philips) is a single-channel UART IC for asynchronous serial communication, featuring 32-byte transmit and receive FIFOs, IrDA 1.0 encoder/decoder, programmable auto-RTS/CTS, and operation at 2.5 V, 3.3 V, or 5 V. It supports up to 3 Mbit/s at 5 V and targets embedded industrial control, modem interfaces, and legacy RS-232/RS-485 systems requiring high-throughput serial bridging.
For engineers reviewing the SC16C650BIB48 datasheet, SC16C650BIB48 pinout, SC16C650BIB48 application, or SC16C650BIB48 equivalent, key selection considerations include FIFO trigger level configurability, IrDA baseband support, voltage-flexible I/O tolerance, DMA-ready RXRDY/TXRDY signaling, and compatibility with 16C450/16C550 software stacks.
Technical Context
The SC16C650BIB48 implements a dual-FIFO architecture with independent 32-byte TX/RX buffers and four selectable interrupt trigger levels per FIFO. Its baud rate generator accepts up to 48 MHz input clock and delivers precise division via DLL/DLM registers, supporting DC–3 Mbit/s with 16× oversampling.
Hardware flow control uses dedicated CTS/RTS pins with auto-CTS (transmit gating) and auto-RTS (FIFO-level-driven assertion), while software flow control compares incoming data against programmable Xon/Xoff characters. The device includes full modem control (DTR/DSR/RI/DCD), loop-back diagnostics, and sleep mode with floating XTAL2.
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 industrial systems without level shifters. |
| Max Data Rate | 3 Mbit/s at 5 V (48 MHz clock) - supports high-speed modem and network interface applications. |
| FIFO Depth | 32-byte TX + 32-byte RX - reduces CPU interrupt load by >75% vs. 16C450 (0-byte) and 16C550 (16-byte). |
| IrDA Support | IrDA 1.0 physical layer (115.2 kbit/s) - provides integrated infrared baseband encoding/decoding without external transceivers. |
| Interrupt Priority | Prioritized ISR with independent TX/RX/line/modem sources - allows deterministic real-time response in multitasked firmware. |
| Operating Temp | −40 °C to +85 °C - qualified for industrial temperature range deployment in harsh environments. |
| Reset Behavior | Power-up identical to 16C450 register map - ensures drop-in replacement for legacy 16C450 software drivers. |
Pinout & Package
LQFP48 package: plastic low-profile quad flat package, 48 leads, body size 7 × 7 × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Data bus I/O | 8-bit bidirectional parallel interface to CPU or microcontroller; 3-state TTL drive for shared bus systems. |
| TX / RX | Serial I/O | Asynchronous transmit output and receive input; compatible with RS-232/RS-485 transceivers or IrDA PHY layers. |
| RTS / CTS | Flow control | Hardware handshaking signals; auto-RTS asserts when RX FIFO exceeds threshold; auto-CTS halts TX on remote buffer full. |
| RCLK / BAUDOUT | Clock I/O | RCLK accepts external 16× receiver clock; BAUDOUT outputs 16× transmitter clock for synchronous slave timing or external receiver use. |
| INT / RXRDY / TXRDY | Interrupt & DMA | INT signals pending events; RXRDY/TXRDY provide DMA-ready strobes with configurable single/multi-transfer modes. |
| XTAL1 / XTAL2 | Oscillator | Crystal input (parallel-resonant, 22–33 pF load) or external clock source; XTAL2 floats in sleep mode. |
| A0–A2 / AS / CS0–CS2 | Address decode | Standard 8-bit ISA-style address/data multiplexing; AS enables direct register select; CS0/CS1/CS2 enable chip selection logic. |
| IOR / IOW | Bus control | Active-HIGH or active-LOW read/write strobes - supports both Intel- and Motorola-style bus timing conventions. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable FIFO trigger levels | Four selectable thresholds (8/16/24/28 bytes) per FIFO - enables fine-grained trade-off between latency and CPU overhead. |
| Auto-RTS/CTS hardware flow control | On-chip logic eliminates need for external GPIO polling or firmware-based handshaking - improves real-time determinism. |
| IrDA 1.0 encoder/decoder | Integrated baseband modulation/demodulation for 115.2 kbit/s infrared links - removes discrete IrDA PHY IC and associated BOM cost. |
| Enhanced feature register (EFR) | Enables advanced functions including double-Xon/Xoff detection, special character recognition, and enhanced interrupt masking - extends legacy driver compatibility. |
| Sleep mode with floating XTAL2 | Reduces quiescent current during idle periods while preserving register state - suitable for battery-backed or energy-sensitive designs. |
Applications
| Industrial Modem Interface | Legacy RS-232 Bridge |
|---|---|
Use Scenario: Connecting PLCs or HMIs to dial-up modems in remote telemetry systems operating across −40 °C to +85 °C environments. IC Role / Device Role / Timing Role: UART performs parallel-to-serial conversion, manages RTS/CTS handshaking, and generates precise baud clocks for 33.6 kbit/s modem signaling. Use Value: 32-byte FIFOs prevent data loss during burst transmissions; auto-flow control eliminates firmware polling; 5 V tolerance simplifies interface to legacy modem ICs. | Use Scenario: Replacing obsolete 16C450/16C550 UARTs in medical diagnostic equipment requiring long-term component availability and unchanged PCB layout. IC Role / Device Role / Timing Role: Drop-in functional replacement providing identical register mapping post-reset, with enhanced FIFO and interrupt capabilities transparent to existing BIOS/firmware. Use Value: Pin-compatible LQFP48 footprint enables zero-layout-change upgrade; 16C450 software compatibility avoids driver revalidation; industrial temp grade ensures field reliability. |
| IrDA-Based Remote Control | Multi-Channel Serial Hub |
Use Scenario: Enabling infrared remote configuration of HVAC controllers or smart meters using standard IrDA 1.0 protocols at 115.2 kbit/s. IC Role / Device Role / Timing Role: Performs IrDA physical layer encoding/decoding, serial framing, and error checking - eliminating need for separate IrDA transceiver IC. Use Value: Integrated IrDA logic reduces BOM count and board area; 32-byte RX FIFO accommodates command bursts; low-power sleep mode extends battery life. | Use Scenario: Serving as primary serial controller in network-attached storage (NAS) enclosures managing multiple SATA-to-serial bridges and environmental sensors. IC Role / Device Role / Timing Role: Central UART aggregator handling concurrent high-throughput streams from multiple peripherals via DMA-triggered RXRDY/TXRDY signaling. Use Value: Independent TX/RX FIFO trigger levels optimize throughput per channel; prioritized interrupts prevent starvation; 3 Mbit/s capability supports fast sensor telemetry aggregation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL16C750IPM | 32-byte FIFO, 5 V only, no IrDA, higher max data rate (5 Mbit/s), different pinout (64-pin TQFP) | Targeted at high-speed industrial backplanes where IrDA is unnecessary and 5 V supply is fixed | Select when IrDA is not required and higher speed or 5 V-only operation is acceptable; requires PCB redesign due to non-pin-compatible package. |
| SC16C750BIB48 | Same LQFP48 package, adds 64-byte FIFOs, IrDA 1.1, extended baud range, but requires updated driver initialization sequence | Used in next-generation designs needing deeper buffering and faster IrDA (up to 4 Mbit/s) | Choose for forward-compatible upgrades where firmware can be modified; maintains same footprint and voltage flexibility as SC16C650BIB48. |
Compared with TL16C750IPM and SC16C750BIB48, the SC16C650BIB48 uniquely balances IrDA 1.0 integration, multi-voltage operation, and 16C450 software compatibility - making it optimal for cost-sensitive, mixed-voltage legacy system upgrades where minimal firmware changes and infrared capability are essential.
Availability
SC16C650BIB48 is available at Aetrix Electronics and suitable for industrial modem interfaces, legacy RS-232 bridge replacements, IrDA-based remote control systems, and multi-channel serial hub applications requiring stable component supply across extended product lifecycles.
Supply support for SC16C650BIB48 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, formerly Philips Semiconductors, is a global leader in high-performance mixed-signal ICs, with expertise in connectivity, security, and automotive electronics.
The SC16C650BIB48 belongs to NXP's legacy UART product line, designed specifically for industrial and telecom infrastructure requiring robust, long-lifecycle serial communication solutions with backward compatibility and enhanced FIFO performance.
FAQ
What voltage levels does the SC16C650BIB48 support, and how does that affect system design?
The SC16C650BIB48 operates at 2.5 V, 3.3 V, or 5 V ±10%, with 5 V-tolerant inputs. This allows direct interfacing with legacy 5 V logic, modern 3.3 V microcontrollers, and low-power 2.5 V subsystems without external level shifters. System designers benefit from simplified power architecture and reduced BOM cost, especially in mixed-voltage industrial equipment where the SC16C650BIB48 serves as a universal serial bridge.
Does the SC16C650BIB48 support IrDA, and what version and data rate is implemented?
Yes, the SC16C650BIB48 integrates an IrDA 1.0 encoder/decoder supporting up to 115.2 kbit/s baseband signaling. It handles pulse shaping, RZI modulation, and demodulation internally, eliminating the need for an external IrDA PHY IC. This capability is confirmed in the official Philips product data sheet Rev. 03 and enables compact infrared remote control or configuration interfaces in devices using the SC16C650BIB48.
How many FIFO levels does the SC16C650BIB48 provide, and how are they configured?
The SC16C650BIB48 provides independent 32-byte transmit and 32-byte receive FIFOs, each configurable with four interrupt trigger levels: 8, 16, 24, or 28 bytes. Configuration is performed via the FIFO Control Register (FCR), and the transmit trigger level defaults to 16 after reset. This granularity allows designers to tune latency versus CPU interrupt frequency - a critical advantage over 16C450 (no FIFO) and 16C550 (16-byte) when deploying the SC16C650BIB48 in high-throughput serial gateways.
Is the SC16C650BIB48 pin-compatible with earlier UARTs, and which ones?
Yes, the SC16C650BIB48 is pin-compatible with the ST16C650A and functionally equivalent to the 16C450 at power-up. It also maintains software compatibility with ST16C650 and supports legacy 16C450 drivers out-of-the-box. The LQFP48 variant (SC16C650BIB48) shares identical pin assignments for core signals (D0–D7, TX, RX, RTS, CTS, INT, etc.) with other SC16C650B package variants, ensuring mechanical and electrical interoperability in existing layouts.
What are the key differences between SC16C650BIB48 and SC16C750BIB48?
The SC16C750BIB48 extends the SC16C650BIB48 with 64-byte FIFOs, IrDA 1.1 support (up to 4 Mbit/s), wider baud rate range, and additional enhanced features - but requires updated driver initialization. Both share the same LQFP48 package and voltage flexibility. The SC16C650BIB48 remains preferred where IrDA 1.0 suffices, firmware reuse is mandatory, and cost sensitivity favors proven maturity over newer capabilities.
SC16C650BIB48,151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 1, UART
- FIFO's:
- 32 Byte
- Protocol:
- -
- Data Rate (Max):
- 3Mbps
- Voltage - Supply:
- 2.5V, 3.3V, 5V
- 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:
- 48-LQFP (7x7)
SC16C650BIB48,151 FAQ
1.How can I place an order for SC16C650BIB48,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C650BIB48,151 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 SC16C650BIB48,151 reliable?
The price and inventory of SC16C650BIB48,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C650BIB48,151 is usually 5 days.
3.What payment methods are accepted for SC16C650BIB48,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C650BIB48,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C650BIB48,151?
SC16C650BIB48,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C650BIB48,151 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 SC16C650BIB48,151?
For technical support, including SC16C650BIB48,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C650BIB48,151 requirements.
6.How does Aetrix verify that SC16C650BIB48,151 is sourced from the original manufacturer or authorized distributors?
All SC16C650BIB48,151 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 SC16C650BIB48,151 meets industry standards.
7.What is the process for return or replacement of SC16C650BIB48,151?
All SC16C650BIB48,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C650BIB48,151, 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 SC16C650BIB48,151 part is unused and in its original packaging.
Return procedure for SC16C650BIB48,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C650BIB48,151 Tags
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