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NXP Semiconductors SC28L198A1BE,557
- Part No.:
- SC28L198A1BE,557
- Manufacturer:
- NXP Semiconductors
- Package:
- 100-LQFP
- Datasheet:
-
SC28L198A1BE,557.pdf
- Description:
- IC UART OCTAL W/FIFO 100-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,548
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Product details
Overview
SC28L198A1BE,557 from NXP Semiconductors (formerly Philips) is an octal UART IC supporting both 3.3 V and 5 V supply operation, integrating eight independent full-duplex asynchronous serial channels with 16-byte transmit and receive FIFOs per channel, programmable baud rates up to 500 kbaud, and hardware/software flow control - deployed in industrial terminal servers and process control concentrators.
For engineers reviewing the SC28L198A1BE,557 datasheet, SC28L198A1BE,557 pinout, SC28L198A1BE,557 application, or SC28L198A1BE,557 equivalent, key selection criteria include dual-voltage compatibility, 100-pin LQFP package, synchronous/asynchronous host interface timing, and multi-drop wake-up capability for legacy RS-232/422 systems.
Technical Context
The SC28L198A1BE,557 implements a synchronous host interface clocked by SCLK (up to 33 MHz), with CEN/W_RN-controlled register access across four-cycle bus cycles. Its timing architecture combines a crystal oscillator (2–8 MHz), fixed-rate BRG (22 standard rates), and two 16-bit reload counters for non-standard baud generation.
Each of the eight UART channels supports independent receiver/transmitter clocking (1x or 16x modes), automatic address recognition in multi-drop mode, and three-byte character recognition. Interrupt arbitration resolves up to 24 sources with vectored IRQN reporting including channel number, interrupt type, and FIFO fill level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V ±10% or 5 V ±10% - enables direct integration into mixed-voltage industrial backplanes without level-shifting. |
| UART Channels | 8 independent full-duplex channels - supports parallel serial I/O for multi-terminal systems without external multiplexing. |
| FIFO Depth | 16-byte TX/RX FIFO per channel - reduces CPU interrupt overhead and prevents overrun at sustained 500 kbaud data rates. |
| Baud Rate Range | 50 to 500 kbaud - covers standard telecom (50–115.2k) and high-speed industrial (230.4k–500k) protocols via BRG or counter-based generation. |
| Host Interface | Synchronous or asynchronous 8-bit parallel bus - compatible with 33 MHz microcontroller buses using CEN/W_RN and SCLK timing. |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial embedded environments including plant automation and transportation control. |
| Package | 100-pin LQFP (SOT407-1) - provides 84 functional pins including 32 I/O port lines, global I/O, and dedicated modem control signals. |
Pinout & Package
SC28L198A1BE,557 is housed in a 100-pin LQFP (SOT407-1) package with exposed thermal pad, rated for industrial temperature range (–40 °C to +85 °C). Pin functions are defined per the official Philips SC28L198 datasheet Rev. 2006 Aug 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A(7:0) | Address bus inputs | Selects internal register or FIFO address; A[6] unused per datasheet specification. |
| D(7:0) | Bi-directional data bus | Transfers command/status data and serial I/O buffers between host CPU and UART registers. |
| CEN | Chip enable (active low) | Enables I/O access to registers; must be deasserted during IACKN cycle to avoid conflict. |
| W_RN | Write/read control (active high = write) | Determines direction of D[7:0] transfer; synchronizes with SCLK and CEN timing windows. |
| IRQN | Interrupt request (open-drain, active low) | Signals pending interrupts; supports priority-based arbitration with channel-type context reporting. |
| IACKN | Interrupt acknowledge (active low) | Indicates host CPU has entered interrupt service routine; used to update CIR register and clear IRQN. |
| SCLK | System clock input | Times host interface operations; must exceed 2× highest X1/counter/TxC/RxC frequency for reliable timing. |
| X1/CCLK | Crystal or external clock input | Drives BRG and timing blocks; supports 2–8 MHz crystals or 100 kHz–10 MHz external clocks. |
| RxDa–RxDh | Receiver data inputs (8 channels) | Accept asynchronous serial input; each supports 1x/16x sampling, framing/parity error detection, and break detection. |
| TxDa–TxDh | Transmitter data outputs (8 channels) | Drive RS-232/422-level signals via external transceivers; support 1x/16x transmission and programmable data formats. |
| I/O0a–I/O3h | Configurable I/O ports (32 pins) | Support modem control (RTS/CTS), clock distribution, general-purpose I/O, and change-of-state detection. |
| Gin0/Gin1 | Global input pins | Available to all channels for synchronized event capture (e.g., external trigger or status flag). |
| Gout0 | Global output pin | Provides channel-agnostic output signal (e.g., system ready, watchdog timeout, or shared interrupt indicator). |
Key Features
| Feature | Design Value |
|---|---|
| Independent RX/TX clocking | Enables dual-speed full-duplex operation per channel (e.g., 9600 bps RX / 115.2 kbps TX) for clustered terminal applications. |
| Programmable interrupt vector format | Supports three IRQN encoding modes: unmodified vector, channel-number-modified, or channel-type-modified - simplifying ISR dispatch logic. |
| In-band Xon/Xoff flow control | Allows software-defined pause/resume characters per channel, eliminating need for external handshaking lines in point-to-point links. |
| Multi-drop wake-up mode | Permits selective activation of individual UARTs on shared bus via address recognition - reducing power and noise in distributed systems. |
| Power-down mode with register retention | Stops crystal oscillator while preserving all register contents, cutting dynamic power by orders of magnitude during idle periods. |
| False start-bit and line-break detection | Improves robustness in noisy industrial environments by rejecting spurious leading edges and enabling clean break signaling for remote reset. |
Applications
| Terminal Server | Process Control Concentrator |
|---|---|
Use Scenario: Aggregating serial console access from dozens of network devices (routers, switches, PDUs) into a single Ethernet-connected management port. IC Role / Device Role / Timing Role: SC28L198A1BE,557 serves as the core serial I/O engine, managing eight concurrent RS-232 sessions with hardware flow control and deep FIFO buffering. Use Value: Eliminates per-port microcontrollers; reduces BOM cost and PCB area while maintaining deterministic latency under burst traffic loads. | Use Scenario: Centralized collection of sensor data (temperature, pressure, flow) from multiple PLCs and field instruments across a factory floor. IC Role / Device Role / Timing Role: SC28L198A1BE,557 acts as a data concentrator UART, interfacing with Modbus RTU or ASCII slaves over RS-485 multidrop networks. Use Value: Enables automatic address recognition and wake-up mode to selectively poll devices, minimizing bus contention and power consumption. |
| ISDN Front End | Automotive Diagnostic Hub |
Use Scenario: Bridging legacy ISDN BRI (2B+D) interfaces to modern packet-switching infrastructure in telecom access nodes. IC Role / Device Role / Timing Role: SC28L198A1BE,557 handles D-channel framing, HDLC processing, and protocol translation between ISDN layer 2 and host processor. Use Value: Provides precise 16x oversampling and programmable data formats required for reliable D-channel bit recovery at 16 kbps. | Use Scenario: Unified diagnostic gateway connecting J1939 (CAN), K-Line (ISO 9141), and UART-based ECU debug ports in heavy-duty vehicle ECUs. IC Role / Device Role / Timing Role: SC28L198A1BE,557 manages multiple serial diagnostic interfaces simultaneously, including bootloader communication and flash programming channels. Use Value: Supports simultaneous 500 kbaud firmware updates and low-speed parameter reads without CPU intervention via FIFO and interrupt arbitration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC28L198A1A | Identical functionality and register set; differs only in 84-pin PLCC (SOT189-2) packaging instead of 100-pin LQFP. | Requires PCB redesign due to different footprint, pin count, and thermal characteristics; suitable where PLCC reworkability or legacy board compatibility is prioritized. | Select SC28L198A1A only when PLCC mounting and hand-soldering capability are required; not drop-in compatible with SC28L198A1BE,557 layout. |
| EXAR XR16L788 | Pin-compatible 100-pin LQFP octal UART with 64-byte FIFOs, integrated RS-232 transceivers, and PCIe interface option - but lacks multi-drop wake-up and global I/O pins. | Targets newer designs requiring higher FIFO depth and integrated level-shifting; unsuitable for legacy systems relying on SC28L198A1BE,557's Gin/Gout or character recognition features. | Choose XR16L788 for greenfield designs needing larger buffers and transceiver integration; retain SC28L198A1BE,557 for existing industrial installations requiring exact feature parity. |
Compared with SC28L198A1A, the SC28L198A1BE,557 offers superior thermal performance and routing density in LQFP, while the XR16L788 trades legacy compatibility for modern integration - making SC28L198A1BE,557 the optimal choice for industrial upgrades requiring unchanged firmware and identical interrupt behavior.
Availability
SC28L198A1BE,557 is available at Aetrix Electronics and suitable for industrial terminal servers, process control concentrators, and automotive diagnostic hubs requiring stable component supply across extended product lifecycles.
Supply support for SC28L198A1BE,557 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, with roots in Philips' pioneering analog and mixed-signal design heritage.
The SC28L198A1BE,557 belongs to NXP's legacy communications interface portfolio, engineered specifically for high-reliability, multi-channel serial bridging in industrial automation and telecom infrastructure where long-term availability and deterministic timing are critical.
FAQ
What voltage supplies does the SC28L198A1BE,557 support?
The SC28L198A1BE,557 operates from either a 3.3 V ±10% or 5 V ±10% single supply, with TTL-compatible I/O levels maintained across both rails. It does not require dual-supply sequencing or external level shifters, simplifying power design in mixed-voltage systems where the SC28L198A1BE,557 interfaces with both 3.3 V microcontrollers and legacy 5 V peripherals.
How many serial channels does the SC28L198A1BE,557 provide, and what is the FIFO depth per channel?
The SC28L198A1BE,557 integrates eight independent full-duplex UART channels, each with a dedicated 16-byte transmit FIFO and 16-byte receive FIFO. This depth minimizes interrupt frequency and prevents data loss at sustained baud rates up to 500 kbaud, making the SC28L198A1BE,557 suitable for high-throughput industrial telemetry applications.
Does the SC28L198A1BE,557 support hardware flow control, and how is it implemented?
Yes, the SC28L198A1BE,557 supports both hardware (RTS/CTS) and software (Xon/Xoff) flow control. Hardware handshaking uses dedicated I/O port pins (e.g., I/O0a–I/O3h configured as RTSN/CTSN), while in-band Xon/Xoff is programmable per channel with user-defined ASCII characters - enabling flexible flow control without additional signal lines in the SC28L198A1BE,557's implementation.
What is the maximum baud rate achievable with the SC28L198A1BE,557, and how is it generated?
The SC28L198A1BE,557 supports baud rates up to 500 kbaud using its dual 16-bit programmable counters or external 16x clock inputs. Standard rates (50–230.4 kbaud) are generated by the built-in BRG; doubling is achieved with 7.3728 MHz crystals or faster clocks, and non-standard rates rely on counter reload values - all configurable independently for RX and TX in each of the eight channels of the SC28L198A1BE,557.
Is the SC28L198A1BE,557 pin-compatible with other members of the SC28L198 family?
The SC28L198A1BE,557 shares identical pinout and register mapping with the SC28L198A1A variant, differing only in package (100-pin LQFP vs. 84-pin PLCC). No other SC28L198 variants offer pin compatibility; substitution requires matching the exact suffix (A1BE) and verifying LQFP mechanical constraints, thermal pad connection, and PCB layout for the SC28L198A1BE,557.
SC28L198A1BE,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 100-LQFP
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Features:
- Internal Oscillator, Timer/Counter
- Number of Channels:
- 8
- FIFO's:
- 16 Byte
- Protocol:
- -
- Data Rate (Max):
- -
- Voltage - Supply:
- 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:
- 100-LQFP (14x14)
SC28L198A1BE,557 FAQ
1.How can I place an order for SC28L198A1BE,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC28L198A1BE,557 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 SC28L198A1BE,557 reliable?
The price and inventory of SC28L198A1BE,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC28L198A1BE,557 is usually 5 days.
3.What payment methods are accepted for SC28L198A1BE,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC28L198A1BE,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC28L198A1BE,557?
SC28L198A1BE,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC28L198A1BE,557 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 SC28L198A1BE,557?
For technical support, including SC28L198A1BE,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC28L198A1BE,557 requirements.
6.How does Aetrix verify that SC28L198A1BE,557 is sourced from the original manufacturer or authorized distributors?
All SC28L198A1BE,557 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 SC28L198A1BE,557 meets industry standards.
7.What is the process for return or replacement of SC28L198A1BE,557?
All SC28L198A1BE,557 units undergo pre-shipment inspection (PSI). If there is an issue with SC28L198A1BE,557, 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 SC28L198A1BE,557 part is unused and in its original packaging.
Return procedure for SC28L198A1BE,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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