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NXP Semiconductors SC16C652BIB48,151
- Part No.:
- SC16C652BIB48,151
- Manufacturer:
- NXP Semiconductors
- Package:
- 48-LQFP
- Datasheet:
-
SC16C652BIB48,151.pdf
- Description:
- UART INTERFACE IC 2CH. UART 32B
- Quantity:
- Payment:
- Shipping:
Inventory:1,450
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Product details
Overview
SC16C652BIB48,151 from NXP Semiconductors (formerly Philips) is a dual-channel UART IC designed for high-speed serial data conversion in embedded communication interfaces. It supports up to 5 Mbit/s at 5 V/3.3 V, features independent 32-byte TX/RX FIFOs, IrDA 1.0 encoder/decoder, and operates across −40 °C to +85 °C in LQFP48 package. It serves as a drop-in upgrade for legacy 16C2450/16C2550 designs in industrial modems and multi-protocol gateways.
For engineers reviewing the SC16C652BIB48,151 datasheet, SC16C652BIB48,151 pinout, SC16C652BIB48,151 application, or SC16C652BIB48,151 equivalent, key selection criteria include dual-channel asynchronous framing support, programmable 5–115.2 kbit/s IrDA rates, hardware/software flow control implementation, and compatibility with 8-bit parallel bus interfacing using CSA/CSB channel select.
Technical Context
The SC16C652BIB48,151 implements two independent UART channels (A and B), each with dedicated 32-byte transmit and receive FIFOs, separate baud rate generators, and full modem control logic (CTS/RTS/DSR/DTR/RI/CD). Its register set includes enhanced feature registers (EFR), Xon/Xoff character comparators, and time-out detection for robust error handling.
It supports three operating voltages (5 V, 3.3 V, 2.5 V) with 5 V-tolerant inputs, uses an external crystal (XTAL1/XTAL2) or clock input up to 80 MHz for baud generation, and provides DMA-ready TXRDY/RXRDY signals synchronized to FIFO trigger levels - enabling efficient CPU offload in real-time embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 5 Mbit/s at 5 V/3.3 V; 3 Mbit/s at 2.5 V - enables high-throughput modem and networking links without external clock multiplication. |
| FIFO Depth | 32-byte TX and RX per channel - reduces CPU interrupt frequency by >50% vs. 16C2550's 16-byte FIFO, lowering host bandwidth demand. |
| Supply Voltage | 2.5 V / 3.3 V / 5 V operation with 5 V-tolerant inputs - allows direct interface to mixed-voltage legacy and modern microcontrollers. |
| IrDA Support | IrDA 1.0 compliant encoder/decoder up to 115.2 kbit/s - enables infrared wireless connectivity without external transceiver ICs. |
| Temperature Range | −40 °C to +85 °C industrial grade - ensures reliable operation in factory automation, telecom infrastructure, and outdoor gateways. |
| Interrupt Architecture | Prioritized, independently enabled TX/RX/line/modem interrupts per channel - simplifies deterministic real-time response in multi-UART applications. |
| Baud Generation | Programmable divisor (1–65535) with 16× oversampling - achieves precise standard (e.g., 115.2 kbit/s) and custom rates from 50 bit/s to 5 Mbit/s. |
Pinout & Package
LQFP48 package (7 × 7 × 1.4 mm, SOT313-2), lead-free, RoHS-compliant, with 48-pin quad flat layout optimized for 8-bit parallel bus interfacing and dual UART channel isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | Bi-directional data bus | 8-bit parallel interface to CPU; 3-state TTL drive enables shared bus operation without external buffers. |
| CSA / CSB | Channel-select chip enable | Active-low enables independent access to UART A or B registers - eliminates address decoding logic in dual-port systems. |
| TXA / TXB, RXA / RXB | Serial I/O pairs | Dedicated full-duplex signal paths per channel; internal loop-back mode isolates physical layer faults during diagnostics. |
| RTSA / RTSB, CTSA / CTSB | Hardware flow control | Asymmetric active-low signaling enables automatic buffer management with modems and RS-232 transceivers. |
| INTA / INTB | Priority-encoded interrupt outputs | Open-drain, 3-state outputs allow wired-OR interrupt aggregation - simplifies IRQ routing in multi-peripheral SoC designs. |
| TXRDYA / TXRDYB, RXRDYA / RXRDYB | DMA-ready status flags | Active-low signals indicate FIFO readiness for burst transfers - synchronizes DMA controller timing without polling overhead. |
| XTAL1 / XTAL2 | Clock input/output | Supports 1.8432 MHz crystal (for 115.2 kbit/s) or up to 80 MHz external clock - enables flexible timing source selection per system requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Independent TX/RX FIFO trigger levels | Four selectable thresholds (8/16/24/28 bytes) per channel - optimizes interrupt latency vs. CPU load trade-off in asymmetric traffic scenarios. |
| Automatic hardware flow control | RTS/CTS handshake controlled via EFR bits - prevents data loss during burst transmission without software intervention. |
| Software flow control | Programmable Xon1/Xon2 and Xoff1/Xoff2 8-bit characters - enables protocol-compliant pause/resume in ASCII-based terminal and printer interfaces. |
| Sleep mode | Low-power state reducing current draw while preserving register contents - extends battery life in portable diagnostic tools and handheld terminals. |
| False start-bit detection | Hardware rejection of spurious leading edges - improves noise immunity on long RS-485 or unshielded UART traces in industrial environments. |
| Internal loop-back diagnostics | Full channel self-test via MCR[4] - validates UART functionality pre-deployment without external loop cables or test equipment. |
Applications
| Industrial Modem Interface | Multi-Protocol Gateway |
|---|---|
Use Scenario: Connecting PLCs and HMIs to PSTN or GPRS modems in factory floor networks. IC Role / Device Role / Timing Role: Dual UART bridges parallel microcontroller bus to two independent serial modem channels with hardware flow control and IrDA fallback. Use Value: 32-byte FIFOs reduce CPU servicing overhead by 60% vs. 16C2450, enabling concurrent protocol parsing and real-time I/O scanning. | Use Scenario: Aggregating RS-232, RS-485, and infrared device streams into a single ARM-based edge controller. IC Role / Device Role / Timing Role: UART A handles RS-232 debug port; UART B manages IrDA printer link - both share same 8-bit bus and interrupt vector. Use Value: Pin-compatible replacement for SC16C2550 allows reuse of existing PCB layout while adding IrDA support and doubling FIFO depth. |
| Legacy System Upgrade | Telecom Line Card |
Use Scenario: Retrofitting aging PBX or fax server boards with higher throughput and lower interrupt load. IC Role / Device Role / Timing Role: Drop-in functional replacement for 16C2450 with identical pinout and software initialization sequence. Use Value: Power-up compatibility ensures zero firmware changes; 5 Mbit/s capability future-proofs for VoIP codec upgrades. | Use Scenario: Providing auxiliary serial management ports on carrier-grade DSLAM line cards. IC Role / Device Role / Timing Role: Dedicated UART B handles out-of-band provisioning commands while UART A monitors alarm relay status via DSR/CD pins. Use Value: Industrial temperature range and 5 V tolerance ensure stable operation in unregulated telco cabinets with wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C652BIBS | HVQFN32 package (5 × 5 × 0.85 mm); same electrical specs and register map - no functional difference. | Used where board space is constrained and thermal dissipation via exposed pad is required. | Select SC16C652BIBS for compact, thermally demanding layouts; SC16C652BIB48,151 remains optimal for through-hole prototyping and legacy LQFP tooling. |
| TL16C752BIPM | Texas Instruments part with identical 32-byte FIFOs, IrDA 1.0, and 5 Mbit/s rate; differs in interrupt polarity and reset behavior. | Requires minor driver adaptation due to inverted INT output and different power-on default register states. | Choose TL16C752BIPM only when TI ecosystem alignment or dual-sourcing strategy mandates cross-manufacturer redundancy. |
Compared with SC16C652BIB48,151, SC16C652BIBS offers identical functionality in a smaller footprint but requires requalification of soldering profiles and thermal management, while TL16C752BIPM demands firmware-level interrupt handling adjustments despite matching core UART performance.
Availability
SC16C652BIB48,151 is available at Aetrix Electronics and suitable for industrial modem interfaces, multi-protocol gateways, and legacy system upgrades requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SC16C652BIB48,151 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 SC16C652BIB48,151 belongs to NXP's legacy UART product line, originally developed by Philips Semiconductors to replace industry-standard 16C450/16C550 devices with enhanced FIFO depth, IrDA integration, and multi-voltage operation for industrial communications infrastructure.
FAQ
What voltage levels does the SC16C652BIB48,151 support, and are its inputs 5 V tolerant?
The SC16C652BIB48,151 operates at 2.5 V, 3.3 V, or 5 V supply voltage and features 5 V-tolerant inputs across all digital pins including D0–D7, CSA, CSB, IOR, IOW, and RESET. This allows direct connection to 5 V microcontrollers or level-shifting logic without external translators, simplifying design in mixed-voltage systems where the SC16C652BIB48,151 serves as a universal serial bridge.
How does the SC16C652BIB48,151 handle IrDA communication, and what is its maximum supported data rate?
The SC16C652BIB48,151 integrates a fully compliant IrDA 1.0 encoder/decoder supporting data rates up to 115.2 kbit/s. It performs pulse shaping, encoding (RZI), and decoding internally, eliminating the need for external IrDA transceivers. The SC16C652BIB48,151 configures IrDA mode via the Enhanced Feature Register (EFR), and its timing accuracy meets IrDA physical layer specifications when driven by a stable 1.8432 MHz crystal - making SC16C652BIB48,151 ideal for infrared printer and PDA docking interfaces.
Can the SC16C652BIB48,151 be used as a direct replacement for the 16C2450, and what initialization steps are required?
Yes, the SC16C652BIB48,151 powers up functionally equivalent to the 16C2450 and is pin-compatible in the LQFP48 package. No hardware changes are needed. Software initialization remains identical: configure LCR for word length/stop bits/parity, load DLL/DLM for baud rate, and enable interrupts via IER. The SC16C652BIB48,151 retains full software compatibility with 16C450/16C550 drivers, ensuring seamless integration into legacy codebases without modification.
What are the FIFO trigger level options for transmit and receive channels on the SC16C652BIB48,151?
The SC16C652BIB48,151 provides four selectable FIFO trigger levels per channel: 8, 16, 24, or 28 bytes for both transmit and receive FIFOs. These are configured independently via the FIFO Control Register (FCR) bits [7:6] for RX and [5:4] for TX. Unlike earlier UARTs, SC16C652BIB48,151 allows full customization of both TX and RX thresholds - enabling fine-grained tuning of interrupt frequency and DMA burst size to match application-specific traffic patterns.
Does the SC16C652BIB48,151 support automatic hardware flow control, and how is it enabled?
Yes, the SC16C652BIB48,151 supports automatic RTS/CTS hardware flow control. It is enabled by setting EFR[7] (CTS) and EFR[6] (RTS) to logic 1, then configuring the modem control register (MCR) appropriately. When CTS deasserts, transmission halts after the current character's stop bit; when RTS is asserted, it signals local buffer readiness. This behavior is fully implemented in hardware, requiring no CPU polling - a key advantage of SC16C652BIB48,151 over basic UARTs in high-speed modem applications.
SC16C652BIB48,151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 2, DUART
- FIFO's:
- 32 Byte
- Protocol:
- -
- Data Rate (Max):
- 5Mbps
- 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)
SC16C652BIB48,151 FAQ
1.How can I place an order for SC16C652BIB48,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C652BIB48,151 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 SC16C652BIB48,151 reliable?
The price and inventory of SC16C652BIB48,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C652BIB48,151 is usually 5 days.
3.What payment methods are accepted for SC16C652BIB48,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C652BIB48,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C652BIB48,151?
SC16C652BIB48,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C652BIB48,151 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 SC16C652BIB48,151?
For technical support, including SC16C652BIB48,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C652BIB48,151 requirements.
6.How does Aetrix verify that SC16C652BIB48,151 is sourced from the original manufacturer or authorized distributors?
All SC16C652BIB48,151 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 SC16C652BIB48,151 meets industry standards.
7.What is the process for return or replacement of SC16C652BIB48,151?
All SC16C652BIB48,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C652BIB48,151, 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 SC16C652BIB48,151 part is unused and in its original packaging.
Return procedure for SC16C652BIB48,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C652BIB48,151 Tags
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SC16IS741AIPWJ
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