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NXP Semiconductors SC16C654BIB64,157
- Part No.:
- SC16C654BIB64,157
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-LQFP
- Datasheet:
-
SC16C654BIB64,157.pdf
- Description:
- IC QUAD UART 64BYTE 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,641
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Product details
Overview
SC16C654BIB64 from NXP Semiconductors (formerly Philips) is a quad UART IC designed for high-throughput serial data communication in embedded systems. It delivers 64-byte transmit and receive FIFOs, supports up to 5 Mbit/s at 3.3 V/5 V, operates across −40 °C to +85 °C, and features automatic hardware/software flow control and IrDA encoding/decoding - enabling robust multi-channel RS-232/RS-485 interface design in industrial gateways and telecom infrastructure.
For engineers reviewing the SC16C654BIB64 datasheet, SC16C654BIB64 pinout, SC16C654BIB64 application, or SC16C654BIB64 equivalent, key selection criteria include its LQFP64 package with Intel-style 16-mode bus interface, 4-channel independent interrupt support, programmable FIFO trigger levels, and compatibility with legacy ST16C654/TL16C754 designs while adding enhanced diagnostics and sleep mode.
Technical Context
The SC16C654BIB64 implements four independent asynchronous receiver/transmitter channels sharing a common 8-bit bidirectional data bus (D0–D7), address decoding (A0–A2), and chip-select logic (CSA–CSD). Its dual-mode interface (16/68) is fixed to 16 mode on LQFP64 packages, eliminating R/W and IRQ multiplexing and retaining discrete INTA–INTD outputs.
Each channel integrates a baud rate generator with crystal (XTAL1/XTAL2) or external clock input, full modem control (RTS/CTS/DSR/DTR/RI/CD), false start-bit detection, and line-break generation/detection. The 64-byte FIFOs reduce CPU interrupt load by extending service intervals up to 6.1 ms at 115.2 kbit/s versus 1.53 ms for 16-byte FIFO devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent UARTs with fully separate TX/RX paths and modem control signals |
| Max Data Rate | 5 Mbit/s at 3.3 V or 5 V; enables high-speed modem and networking interfaces |
| FIFO Depth | 64-byte transmit and receive buffers per channel - reduces CPU servicing frequency by 4× vs 16-byte FIFOs |
| Supply Voltage | 2.5 V, 3.3 V, or 5 V operation - supports mixed-voltage system integration and legacy 5 V designs |
| Temperature Range | −40 °C to +85 °C industrial grade - qualified for deployment in harsh environments |
| Interface Mode | Fixed 16-mode (Intel bus) on LQFP64 - uses IOR/IOW strobes and discrete CSA–CSD/INTA–INTD pins |
| IrDA Support | Integrated infrared encoder/decoder - enables direct IrDA 1.0 physical layer compliance without external components |
Pinout & Package
SC16C654BIB64 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. Pin functions are defined for 16-mode operation only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CSA–CSD | Individual channel chip select (active LOW) | Selects UART A–D independently; enables simultaneous multi-port access without address decoding logic |
| INTA–INTD | Per-channel interrupt output (active HIGH) | Allows prioritized, non-maskable interrupt handling per UART - eliminates polling overhead |
| TXA–TXD / RXA–RXD | Serial transmit/receive data lines | Four isolated full-duplex serial I/O pairs - supports concurrent RS-232/422/485 links |
| RTSA–RTSD / CTSA–CTSD | Hardware flow control outputs/inputs | Enables auto RTS/CTS per channel - prevents buffer overrun in high-speed burst transfers |
| D0–D7, A0–A2, IOR, IOW | 8-bit parallel bus interface | Standard Intel-style microprocessor bus timing - drop-in replacement for ST16C654 in existing 16-bit designs |
Key Features
| Feature | Design Value |
|---|---|
| 64-byte FIFO per channel | Extends CPU interrupt service interval to 6.1 ms at 115.2 kbit/s - cuts software overhead by 75% vs 16-byte FIFO UARTs |
| Auto hardware/software flow control | Eliminates manual XON/XOFF or RTS/CTS management - ensures zero-loss data transfer under variable load |
| Programmable FIFO trigger levels | Four selectable thresholds (1, 4, 8, 14 bytes) per channel - optimizes interrupt latency vs bandwidth trade-off |
| IrDA encoder/decoder | Direct SIR (Serial Infrared) 1.0 compliance - removes need for external IrPHY transceivers in handheld diagnostics |
| Sleep mode | Reduces quiescent current during idle periods - extends battery life in portable industrial terminals |
Applications
| Industrial Serial Gateway | Telecom Line Card |
|---|---|
Use Scenario: Aggregating RS-232/485 sensor data from PLCs, meters, and HMIs into a central controller via PCIe or USB-to-serial bridge. IC Role / Device Role / Timing Role: Quad UART provides four isolated, high-reliability serial ports with hardware flow control and error reporting for deterministic data capture. Use Value: 64-byte FIFOs prevent data loss at 921.6 kbit/s burst rates; industrial temp range ensures uptime in unconditioned cabinets. | Use Scenario: Adding four EIA-232/EIA-449 serial maintenance ports to a carrier-grade DSLAM or OLT line card. IC Role / Device Role / Timing Role: Acts as dedicated management UART subsystem - handles console, provisioning, and alarm logging traffic independently of main processor. Use Value: Discrete INTA–INTD outputs enable real-time fault isolation; 5 V tolerance simplifies level-shifting with legacy backplane interfaces. |
| Medical Diagnostic Terminal | Embedded Test Equipment |
Use Scenario: Connecting ultrasound probes, ECG modules, and barcode scanners to a Linux-based medical tablet via isolated serial expansion. IC Role / Device Role / Timing Role: Provides IrDA-compliant infrared link for secure, cable-free firmware updates and patient data export. Use Value: Integrated IrDA encoder/decoder meets HIPAA-compliant wireless transfer requirements without added PHY ICs or RF certification. | Use Scenario: Enabling simultaneous firmware flashing, debug logging, and instrument control over four RS-232 ports in automated test fixtures. IC Role / Device Role / Timing Role: Serves as programmable serial hub - manages timing-critical JTAG-over-UART, UART bootloader, and ASCII command protocols. Use Value: Sleep mode cuts power during idle test phases; false start-bit detection improves reliability on noisy factory floors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST16C654CJ68 | PLCC68 package; supports both 16- and 68-mode interfaces; includes CLKSEL and INTSEL pins not present on SC16C654BIB64 | Requires PCB layout changes for pin count and footprint; supports flexible bus architecture but lacks LQFP64 compactness | Select when dual-mode interface flexibility or clock-select configuration at boot is required |
| TL16C754BPZ | LQFP64 package; identical pinout and 16-mode interface; 64-byte FIFOs and IrDA support; rated for commercial temperature only (0 °C to +70 °C) | Not qualified for industrial environments; no extended temperature validation or long-term supply assurance | Select for cost-sensitive, non-industrial applications where ambient temperature remains controlled |
Compared with ST16C654CJ68 and TL16C754BPZ, the SC16C654BIB64 uniquely combines industrial temperature rating, LQFP64 compactness, and fixed 16-mode simplicity - making it optimal for space-constrained, field-deployed equipment requiring guaranteed long-term availability and ruggedness.
Availability
SC16C654BIB64 is available at Aetrix Electronics and suitable for industrial serial gateways, telecom line cards, medical diagnostic terminals, and embedded test equipment requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for SC16C654BIB64 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 markets, with deep heritage in legacy Philips logic and interface ICs.
The SC16C654BIB64 belongs to NXP's high-reliability UART product line, engineered specifically for industrial and telecom infrastructure demanding long-lifecycle support, extended temperature operation, and backward compatibility with 16C454/654-based designs.
FAQ
What is the maximum data rate supported by the SC16C654BIB64?
The SC16C654BIB64 supports up to 5 Mbit/s at 3.3 V or 5 V supply voltage, and up to 3 Mbit/s at 2.5 V. This performance is achieved using an external clock input; with a 24 MHz crystal, the device operates reliably up to 1.5 Mbit/s. The SC16C654BIB64 achieves this speed while maintaining full compatibility with standard UART framing (start/stop/parity bits) and error detection mechanisms.
Does the SC16C654BIB64 support both Intel and Motorola bus interfaces?
No, the SC16C654BIB64 is configured exclusively for the 16-mode (Intel-style) interface due to its LQFP64 package constraints. Unlike the PLCC68 variant, it does not expose the 16/68 mode-select pin or R/W/IRQ signals. The SC16C654BIB64 uses IOR/IOW strobes and discrete CSA–CSD/INTA–INTD pins - matching the ST16C654 pinout and register mapping for seamless drop-in replacement.
How does the 64-byte FIFO in the SC16C654BIB64 improve system performance?
The 64-byte FIFO in the SC16C654BIB64 extends the CPU interrupt service interval to 6.1 ms at 115.2 kbit/s (vs 1.53 ms for 16-byte FIFOs), reducing interrupt overhead by ~75%. This allows the host processor to execute longer uninterrupted tasks, improves real-time responsiveness in multi-threaded environments, and lowers average power consumption - especially critical in fanless industrial controllers and battery-powered test gear.
Is IrDA functionality integrated into the SC16C654BIB64?
Yes, the SC16C654BIB64 includes a fully integrated infrared encoder and decoder compliant with IrDA 1.0 SIR (Serial Infrared) physical layer specifications. This eliminates the need for external IrPHY transceivers, reduces BOM count, avoids additional RF certification, and enables secure, short-range wireless firmware updates and data exchange in medical and portable diagnostic devices.
What are the key differences between SC16C654BIB64 and SC16C654DBIB64?
The SC16C654BIB64 and SC16C654DBIB64 share identical LQFP64 packaging and 16-mode interface, but differ in interrupt behavior: SC16C654BIB64 uses MCR[3] to control 3-state INTA–INTD outputs, while SC16C654DBIB64 bonds INTSEL internally to VCC for continuous interrupt enable mode. This makes SC16C654DBIB64 suitable for systems requiring immediate interrupt assertion without software gating.
SC16C654BIB64,157 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:
- 64 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)
SC16C654BIB64,157 FAQ
1.How can I place an order for SC16C654BIB64,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C654BIB64,157 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 SC16C654BIB64,157 reliable?
The price and inventory of SC16C654BIB64,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C654BIB64,157 is usually 5 days.
3.What payment methods are accepted for SC16C654BIB64,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C654BIB64,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C654BIB64,157?
SC16C654BIB64,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C654BIB64,157 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 SC16C654BIB64,157?
For technical support, including SC16C654BIB64,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C654BIB64,157 requirements.
6.How does Aetrix verify that SC16C654BIB64,157 is sourced from the original manufacturer or authorized distributors?
All SC16C654BIB64,157 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 SC16C654BIB64,157 meets industry standards.
7.What is the process for return or replacement of SC16C654BIB64,157?
All SC16C654BIB64,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C654BIB64,157, 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 SC16C654BIB64,157 part is unused and in its original packaging.
Return procedure for SC16C654BIB64,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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