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NXP Semiconductors SC16C554DIB64,151
- Part No.:
- SC16C554DIB64,151
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-LQFP
- Datasheet:
-
SC16C554DIB64,151.pdf
- Description:
- IC UART QUAD 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,951
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Product details
Overview
SC16C554DIB64 from NXP Semiconductors (formerly Philips) is a quad UART IC with integrated 16-byte transmit/receive FIFOs and IrDA infrared encoder/decoder, operating at up to 5 Mbit/s (5 V/3.3 V) or 3 Mbit/s (2.5 V), supporting Intel- and Motorola-compatible bus interfaces, and used in industrial serial communication gateways requiring multi-channel asynchronous data bridging.
For engineers reviewing the SC16C554DIB64 datasheet, SC16C554DIB64 pinout, SC16C554DIB64 application, or SC16C554DIB64 equivalent, key selection considerations include its LQFP64 package, 16-mode-only interface (no 68-mode support), continuous-interrupt enable behavior via internal INTSEL-to-VCC bonding, and IrDA-compliant physical layer support for embedded wireless serial links.
Technical Context
The SC16C554DIB64 implements four independent UART channels sharing a single 8-bit bidirectional data bus (D0–D7), with register addressing via A0–A2 and chip-select logic (CSA–CSD). It supports two distinct operational modes: 16-mode (Intel-style) with individual channel interrupts (INTA–INTD) and discrete chip selects, and-unlike PLCC68 variants-exclusively 16-mode operation due to absence of the 16/68 select pin.
Its enhanced feature set includes programmable FIFO trigger levels (four receive thresholds), automatic hardware flow control (RTS/CTS), software Xon/Xoff detection, sleep mode, and on-chip IrDA encoder/decoder compliant with SIR (Serial Infrared) physical layer specifications. Internal registers-including EFR, DLL/DLM, and FCR-enable full configuration of baud rate, character format, and interrupt behavior without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 5 Mbit/s at 5 V or 3.3 V; 3 Mbit/s at 2.5 V - enables high-speed modem and network interface applications without external clock multiplication. |
| FIFO Depth | 16-byte TX and RX FIFO per channel - reduces CPU interrupt load by ~8× vs legacy 1-byte buffers, supporting sustained throughput in multi-UART systems. |
| Supply Voltage | 2.5 V / 3.3 V / 5 V operation - allows direct integration into mixed-voltage industrial control boards without level-shifting. |
| Interface Mode | 16-mode only (Intel bus compatible) - uses IOR/IOW strobes and CSA–CSD chip selects; no 68-mode (Motorola) support due to missing 16/68 pin. |
| IrDA Support | Integrated IrDA encoder/decoder - provides SIR-compliant 115.2 kbit/s infrared PHY layer, eliminating need for external transceiver ICs. |
| Interrupt Logic | Continuous-interrupt enable via internal INTSEL-to-VCC bond - ensures deterministic interrupt latency without software polling or MCR[3] dependency. |
| Temperature Range | Industrial grade (−40 °C to +85 °C) - qualified for deployment in factory automation, POS terminals, and outdoor telemetry equipment. |
Pinout & Package
SC16C554DIB64 is housed in a plastic low-profile quad flat package (LQFP64) with 64 leads, body size 10 × 10 × 1.4 mm (SOT314-2), lead pitch 0.5 mm, and exposed thermal pad (not electrically connected).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| CSA–CSD | Individual channel chip select (Active-Low) | Selects UART A–D independently in 16-mode; enables concurrent access to multiple channels without address decoding logic. |
| TXA–TXD / RXA–RXD | Transmit/Receive data I/O | Four isolated serial I/O pairs; each operates asynchronously with independent baud rate, parity, and framing settings. |
| INTA–INTD | Per-channel interrupt output (Active-High) | Enables prioritized, channel-specific interrupt handling; avoids software polling across four UARTs. |
| D0–D7 | 8-bit bidirectional data bus | Shared parallel interface to host MCU; requires external tristate control only during simultaneous multi-channel access. |
| A0–A2 | Register address select | Decodes 8 internal register addresses (THR/RHR, IER, FCR, LCR, MCR, LSR, MSR, SPR) per selected UART channel. |
| IOR / IOW | Read/Write strobe control | Intel-compatible bus timing signals; defines register read/write cycles synchronized to host CPU clock domain. |
| RTSA–RTSD / CTSA–CTSD | Hardware flow control I/O | Per-channel RTS (output) and CTS (input); enables automatic buffer management without CPU intervention when EFR[6:7] enabled. |
| XTAL1 / XTAL2 | Crystal oscillator interface | Supports 1–24 MHz crystal or external clock; determines maximum achievable baud rate and jitter performance. |
Key Features
| Feature | Design Value |
|---|---|
| Quad UART with 16-byte FIFOs | Reduces host CPU interrupt frequency by >90% vs legacy 1-byte buffers, enabling real-time scheduling in resource-constrained microcontrollers. |
| IrDA encoder/decoder | Integrates complete SIR physical layer (115.2 kbit/s), eliminating external IR transceiver and simplifying PCB layout for handheld diagnostics tools. |
| Auto hardware/software flow control | Eliminates data loss during burst transfers by dynamically throttling TX via RTS or injecting Xon/Xoff - configurable per channel. |
| Four selectable RX FIFO trigger levels | Allows tuning interrupt latency vs. CPU overhead: 1/4/8/14-byte thresholds optimize response time for varying packet sizes. |
| 16-mode-only LQFP64 interface | Removes ambiguity in bus timing design - fixed Intel-style protocol eliminates mode-selection logic and associated reset-state uncertainty. |
| Continuous-interrupt enable (bonded INTSEL) | Guarantees immediate interrupt assertion on event (e.g., RX ready), removing dependency on MCR[3] bit writes and reducing firmware initialization steps. |
Applications
| Industrial Serial Gateway | POS Terminal Back-End |
|---|---|
Use Scenario: Aggregating RS-232/422 data from PLCs, sensors, and HMIs into a single Ethernet or USB host interface. IC Role / Device Role / Timing Role: Quad UART bridges four legacy serial peripherals simultaneously, with independent FIFO buffering and IrDA debug port. Use Value: Enables deterministic latency control via per-channel trigger-level programming and eliminates CPU bottlenecks during concurrent multi-port polling. | Use Scenario: Connecting barcode scanners, receipt printers, and cash drawers to a central ARM-based payment controller. IC Role / Device Role / Timing Role: SC16C554DIB64 acts as a dedicated serial I/O expansion hub, managing asynchronous timing across heterogeneous peripherals. Use Value: 16-byte FIFOs prevent data overrun during high-volume scanning bursts; IrDA supports wireless firmware updates without opening the enclosure. |
| Medical Device Data Logger | Network Equipment Console Server |
Use Scenario: Capturing diagnostic logs from ECG, infusion pump, and oximeter modules over isolated RS-232 links. IC Role / Device Role / Timing Role: SC16C554DIB64 serves as a fault-tolerant serial concentrator with hardware flow control per channel. Use Value: Auto RTS/CTS prevents buffer overflow during long-duration logging sessions; industrial temperature rating ensures reliability in clinical environments. | Use Scenario: Providing out-of-band console access to routers, switches, and firewalls via RJ-45 serial ports. IC Role / Device Role / Timing Role: SC16C554DIB64 implements four independent console UARTs with IrDA fallback for emergency recovery. Use Value: Continuous-interrupt mode guarantees immediate response to console input; 5 Mbit/s capability supports fast bootlog capture during firmware upgrades. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL16C554IPN | LQFP80 package; supports both 16- and 68-mode interfaces; lacks integrated IrDA encoder/decoder. | Requires external IR transceiver for infrared functionality; suitable where dual-bus compatibility is needed. | Select TL16C554IPN if 68-mode support or larger pin count for routing flexibility is required, but accept added BOM cost for IR PHY. |
| ST16C554CJ | PLCC68 package; includes 16/68 mode select pin; no IrDA support; identical FIFO and flow control features. | Needs external level shifters for 2.5 V operation; incompatible with space-constrained LQFP64 layouts. | Choose ST16C554CJ for legacy board redesigns using PLCC sockets or where mode-select flexibility outweighs package size constraints. |
Compared with TL16C554IPN and ST16C554CJ, SC16C554DIB64 uniquely delivers IrDA PHY integration and LQFP64 compactness with guaranteed continuous-interrupt behavior - making it optimal for new designs prioritizing infrared serviceability and PCB area efficiency.
Availability
SC16C554DIB64 is available at Aetrix Electronics and suitable for industrial serial gateways, POS terminal back-ends, medical data loggers, and network console servers requiring stable component supply and long-term lifecycle assurance.
Supply support for SC16C554DIB64 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 (originally Philips Semiconductors) is a global leader in high-performance mixed-signal ICs, specializing in secure connectivity, automotive, and industrial control solutions.
The SC16C554DIB64 belongs to NXP's legacy industrial UART product line, designed specifically for robust multi-channel serial bridging in harsh environments where reliability, low-power sleep mode, and infrared serviceability are critical.
FAQ
What is the maximum data rate supported by the SC16C554DIB64?
The SC16C554DIB64 supports up to 5 Mbit/s at 5 V or 3.3 V supply, and 3 Mbit/s at 2.5 V. This is achieved using an external clock input; with a 24 MHz crystal, the maximum rate is 1.5 Mbit/s. The actual achievable baud rate depends on divisor register settings and clock source stability, and must be validated against the target system's timing margin requirements. SC16C554DIB64 does not support oversampling beyond its specified limits.
Does the SC16C554DIB64 support both Intel and Motorola bus interfaces?
No, the SC16C554DIB64 supports Intel-style (16-mode) interface only. Unlike the PLCC68 variant (SC16C554DIA68), the LQFP64 package omits the 16/68 mode-select pin. Therefore, SC16C554DIB64 is hardwired for 16-mode operation with IOR/IOW strobes and discrete CSA–CSD chip selects - it cannot be configured for Motorola-style (68-mode) addressing.
How does the SC16C554DIB64 handle interrupt generation compared to other quad UARTs?
The SC16C554DIB64 uses internal bonding to tie the INTSEL pin to VCC, enabling continuous-interrupt mode by default. This means INTA–INTD assert immediately on event (e.g., RX FIFO threshold met) without requiring MCR[3] bit writes. In contrast, standard SC16C554 variants require software configuration of MCR[3] to enable 3-state interrupts, adding initialization complexity and potential latency.
Can the SC16C554DIB64 be used for infrared communication?
Yes, the SC16C554DIB64 integrates a fully compliant IrDA encoder/decoder supporting SIR (Serial Infrared) at 115.2 kbit/s. It handles pulse shaping, encoding (RZI), and decoding internally - no external transceiver is needed. The IrDA interface shares the same TX/RX pins as the UART, and is enabled via the Enhanced Feature Register (EFR), making SC16C554DIB64 suitable for wireless diagnostics and firmware updates.
What are the power supply requirements for reliable operation of the SC16C554DIB64?
The SC16C554DIB64 operates across three nominal supply voltages: 2.5 V, 3.3 V, and 5 V, with full specification compliance across the industrial temperature range (−40 °C to +85 °C). Each voltage rail must be decoupled with ≥100 nF ceramic capacitors near the VCC pins. At 2.5 V, maximum data rate is limited to 3 Mbit/s; all timing parameters and drive strength scale accordingly per supply voltage.
SC16C554DIB64,151 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- -
- Number of Channels:
- 4, QUART
- FIFO's:
- 16 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:
- 64-LQFP (10x10)
SC16C554DIB64,151 FAQ
1.How can I place an order for SC16C554DIB64,151 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C554DIB64,151 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 SC16C554DIB64,151 reliable?
The price and inventory of SC16C554DIB64,151 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C554DIB64,151 is usually 5 days.
3.What payment methods are accepted for SC16C554DIB64,151?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C554DIB64,151 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C554DIB64,151?
SC16C554DIB64,151 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C554DIB64,151 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 SC16C554DIB64,151?
For technical support, including SC16C554DIB64,151 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C554DIB64,151 requirements.
6.How does Aetrix verify that SC16C554DIB64,151 is sourced from the original manufacturer or authorized distributors?
All SC16C554DIB64,151 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 SC16C554DIB64,151 meets industry standards.
7.What is the process for return or replacement of SC16C554DIB64,151?
All SC16C554DIB64,151 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C554DIB64,151, 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 SC16C554DIB64,151 part is unused and in its original packaging.
Return procedure for SC16C554DIB64,151:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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