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NXP Semiconductors SC28L201A1DGG,118
- Part No.:
- SC28L201A1DGG,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SC28L201A1DGG,118.pdf
- Description:
- IC UART W/FIFO 48-TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
SC28L201A1DGG from NXP Semiconductors (formerly Philips) is a high-performance, dual-voltage UART with independent 256-byte receiver and transmitter FIFOs, pin-selectable Intel 80xxx or Motorola 68000 bus interface, and support for up to 3.125 Mbit/s data transfer using a 16× clock. It operates across −40 °C to +85 °C and is used in industrial serial communication gateways requiring robust flow control and multi-drop terminal interfacing.
For engineers reviewing the SC28L201A1DGG datasheet, SC28L201A1DGG pinout, SC28L201A1DGG application, or SC28L201A1DGG equivalent, key selection considerations include its dual-baud-rate programmability per channel, real-time transmission error checking, hardware/software flow control (RTS/CTS & Xon/Xoff), 14-bit multifunction I/O port with change-of-state detection, and TSSOP48 package compatibility with legacy Philips UART designs.
Technical Context
The SC28L201A1DGG implements a full-duplex asynchronous receiver/transmitter with independently configurable baud rates-27 fixed rates (50 Bd to 2.0 MBd), external 1×/16× clocks, or user-defined rates via two 16-bit programmable counter/timers. Its timing architecture includes an on-chip crystal oscillator (7–16.2 MHz), prescalers, and dual BRG paths enabling simultaneous high-speed and low-latency channel operation.
Interrupt arbitration is intelligent and context-aware: each of 11 maskable interrupt sources drives a programmable priority level (0–255), delivers vectorized status including FIFO fill levels, and supports wire-ORed open-drain outputs. The device also integrates three-character recognition logic for address wake-up (9-bit/multi-drop), Xon/Xoff, and general-purpose pattern matching-all with four levels of automation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +3.3 V ±10 % or +5.0 V ±10 %; enables drop-in replacement in mixed-voltage legacy systems |
| Max Data Rate | 3.125 Mbit/s (16× clock mode); supports high-throughput serial bridges and clustered terminal backplanes |
| FIFO Depth | 256-byte RX/TX buffers; reduces CPU interrupt overhead by >95 % vs. 16-byte FIFO UARTs in interrupt-driven systems |
| Baud Rate Flexibility | Receiver and transmitter each support independent selection from 27 fixed rates or custom rates via C/T; critical for dual-speed protocols like RS-485 auto-turnaround |
| Bus Interface | Pin-programmable Intel 80xxx (WRN/RDN/CEN) or Motorola 68000 (R/WN/DACKN/IACKN); eliminates PCB redesign when migrating between microcontroller families |
| Operating Temperature | −40 °C to +85 °C; qualified for industrial control cabinets and outdoor communications enclosures |
| I/O Port Count | 14-bit multifunction I/O (I/O7A–I/O0A + I/O6B–I/O0B); provides modem control, DMA handshaking, and COS-triggered interrupts without external logic |
Pinout & Package
SC28L201A1DGG is housed in a 48-pin TSSOP package (SOT362-1), 6.1 mm body width, with exposed thermal pad not connected internally. Pin functions differ between Intel (80xxx) and Motorola (68000) bus modes, selected by MODE_IM pin voltage.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE_IM (19) | Bus configuration select | HIGH = Intel 80xxx mode (WRN/RDN/CEN); LOW = Motorola 68000 mode (R/WN/DACKN/IACKN) |
| IRQN (46) | Interrupt request output | Active-low open-drain signal indicating pending interrupt; supports wire-OR with other peripherals |
| X1/SCLK (47) | Clock input | Accepts crystal (7–16.2 MHz) or external clock (≤50 MHz); primary timing source for baud generation and timers |
| TXD (45) / RXD (7) | Transmit/Receive data | Full-duplex serial I/O; 'mark' = HIGH, 'space' = LOW; compatible with RS-232/RS-422/RS-485 physical layers |
| I/O7A–I/O0A (37–44) | General-purpose I/O port A | Programmable as inputs, outputs, or internal signal mirrors (RTS/CTS/DTR/DSR); all feature change-of-state detection |
| I/O6B, I/O4B–I/O0B (29,30,31,32,33) | General-purpose I/O port B | Independent COS-capable I/O; no data-path coupling-ideal for alarm monitoring or power-fail signaling |
Key Features
| Feature | Design Value |
|---|---|
| Real-time transmission error check | Compares delayed transmit data with echoed receive data within 1–2 bit times; detects channel corruption before software validation |
| Independent RX/TX baud rate control | Enables asymmetric protocols-e.g., 115.2 kbps upstream / 9.6 kbps downstream in terminal concentrators |
| Three-character recognition engine | Simultaneously monitors for Xon/Xoff, address wake-up, and custom patterns; triggers interrupt or automatic state transition |
| Power-down mode | Consumes <10 µA; retains register state and enables fast wake-up for battery-backed remote terminals |
| Receiver time-out and watchdog timer | Prevents lock-up during broken-line conditions; generates interrupt if no character received for programmable duration |
| Auto echo / local / remote loopback | Validates UART core, processor interface, and external cabling without external test equipment |
Applications
| Industrial Serial Gateway | Multi-Drop Terminal Cluster |
|---|---|
Use Scenario: Aggregating data from multiple Modbus RTU sensors into a single Ethernet backbone via protocol converter. IC Role / Device Role / Timing Role: UART channel handles RS-485 half-duplex framing with automatic RTS-controlled turnaround; 256-byte FIFO absorbs burst traffic from 12+ nodes. Use Value: Eliminates packet loss during sensor polling storms; reduces host CPU load by 70 % compared to 16-byte FIFO alternatives. | Use Scenario: Central controller managing 32 ASCII terminals over a single RS-422 multidrop bus with address-based wake-up. IC Role / Device Role / Timing Role: Implements 9-bit address recognition and auto-wake/auto-doze; receiver FIFO holds incoming commands while transmitter remains idle. Use Value: Cuts average system power by 40 %; enables selective wake-up without continuous polling or external address decoders. |
| Legacy System Upgrade | Industrial PC Expansion Card |
Use Scenario: Replacing obsolete SC26C92 UARTs in aging CNC machine controllers without board rework. IC Role / Device Role / Timing Role: Pin-compatible upgrade path with identical power-up defaults (9600 baud, 8N1); MODE_IM pin retains original bus interface behavior. Use Value: Zero firmware changes required; adds 256-byte FIFOs and dual-baud capability transparently to existing drivers. | Use Scenario: Adding isolated RS-232/485 ports to an industrial PC via PCIe-to-parallel expansion with parallel-to-serial bridge. IC Role / Device Role / Timing Role: Provides 14-bit I/O for handshaking (RTS/CTS/DTR/DSR), DMA request signaling, and COS-triggered event capture from field devices. Use Value: Offloads timing-critical interrupt handling from main CPU; enables deterministic response to field alarms within 5 µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SC16C2552IBS,118 | 2-channel, 64-byte FIFO, 5 V only, no 3.3 V support, lacks real-time error check and COS detection | Suitable for cost-sensitive dual-port applications where voltage flexibility and advanced diagnostics are unnecessary | Choose when consolidating two legacy UARTs onto one die-but verify 3.3 V compatibility and diagnostic requirements |
| TL16C752BPTR | 2-channel, 64-byte FIFO, 3.3 V only, TI-specific register map, no pin-programmable bus interface | Designed for embedded Linux systems with standard 16550-compatible drivers; lacks multi-drop wake-up and 14-bit I/O | Select for new designs targeting kernel UART driver reuse-but expect layout changes and firmware adaptation |
Compared with SC16C2552IBS,118 and TL16C752BPTR, the SC28L201A1DGG uniquely combines dual-voltage operation, 256-byte FIFOs, pin-selectable bus interface, and integrated COS detection-making it the only option for upgrading industrial gateways requiring zero-hardware-change migration and deterministic field-event response.
Availability
SC28L201A1DGG is available at Aetrix Electronics and suitable for industrial serial gateways, multi-drop terminal clusters, legacy system upgrades, and industrial PC expansion cards requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SC28L201A1DGG 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. Formerly Philips Semiconductors, it maintains legacy product support with full documentation and long-term availability commitments.
The SC28L201A1DGG belongs to NXP's IMPACT family of data communications ICs, engineered specifically for high-reliability industrial serial infrastructure-emphasizing voltage flexibility, deep buffering, deterministic interrupt handling, and backward compatibility with Philips UART architectures.
FAQ
What bus interface modes does the SC28L201A1DGG support, and how is mode selection implemented?
The SC28L201A1DGG supports both Intel 80xxx (WRN/RDN/CEN) and Motorola 68000 (R/WN/DACKN/IACKN) bus interfaces. Mode selection is controlled solely by the MODE_IM pin: HIGH or floating configures 80xxx mode; LOW configures 68000 mode. No register writes or external components are needed-mode is fixed at power-up based on this pin's voltage, ensuring deterministic initialization in mixed-platform systems.
Does the SC28L201A1DGG support true hardware flow control, and how is it implemented?
Yes, the SC28L201A1DGG supports full RTS/CTS hardware flow control. RTS is generated by the UART's internal logic and driven on a programmable I/O pin (e.g., I/O0A); CTS is monitored on another I/O pin (e.g., I/O1A). Flow control activation is fully configurable via control registers and can operate autonomously-halting transmission when CTS deasserts-without CPU intervention, ensuring reliable operation in noisy industrial environments.
What is the maximum achievable data rate for the SC28L201A1DGG, and what clocking configuration is required?
The SC28L201A1DGG achieves a maximum data rate of 3.125 Mbit/s when operating in 16× clock mode with a 50 MHz external clock applied to X1/SCLK. With its default 14.7456 MHz crystal, the maximum rate is 3.125 Mbit/s (25 × 14.7456 MHz / 16). The device supports both 1× and 16× sampling modes, and the clock source may be derived from the on-chip oscillator, external crystal, or direct clock input-enabling precise rate matching across diverse system clocks.
How does the SC28L201A1DGG handle multi-drop (9-bit) communication, and what features enable low-power wake-up?
The SC28L201A1DGG implements multi-drop mode via its 9-bit address recognition system, which detects a leading address byte followed by data bytes. It supports automatic wake-up: upon detecting a valid address, the receiver exits low-power mode, fills its 256-byte FIFO, and asserts IRQN-allowing the host to remain in sleep until targeted. This eliminates continuous polling and reduces average system current by up to 40 % in terminal cluster applications.
Can the SC28L201A1DGG's 14-bit I/O port be used for both modem control and event monitoring simultaneously?
Yes. The SC28L201A1DGG's 14-bit I/O port (I/O7A–I/O0A + I/O6B–I/O0B) is fully programmable per pin: individual bits may serve as modem signals (RTS/CTS/DTR/DSR), DMA handshakes, or change-of-state (COS) detectors for external events (e.g., door open, power fail). All inputs remain active even when configured as outputs, enabling concurrent monitoring and control-critical for industrial edge devices requiring deterministic response to field events.
SC28L201A1DGG,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Series:
- Impact
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Features:
- Configurable GPIO, Internal Oscillator, Timer/Counter
- Number of Channels:
- 1, UART
- FIFO's:
- 256 Byte
- Protocol:
- RS485
- Data Rate (Max):
- 3.125Mbps
- 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:
- 48-TSSOP
SC28L201A1DGG,118 FAQ
1.How can I place an order for SC28L201A1DGG,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC28L201A1DGG,118 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 SC28L201A1DGG,118 reliable?
The price and inventory of SC28L201A1DGG,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC28L201A1DGG,118 is usually 5 days.
3.What payment methods are accepted for SC28L201A1DGG,118?
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4.How is shipping managed for SC28L201A1DGG,118?
SC28L201A1DGG,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC28L201A1DGG,118 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 SC28L201A1DGG,118?
For technical support, including SC28L201A1DGG,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC28L201A1DGG,118 requirements.
6.How does Aetrix verify that SC28L201A1DGG,118 is sourced from the original manufacturer or authorized distributors?
All SC28L201A1DGG,118 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 SC28L201A1DGG,118 meets industry standards.
7.What is the process for return or replacement of SC28L201A1DGG,118?
All SC28L201A1DGG,118 units undergo pre-shipment inspection (PSI). If there is an issue with SC28L201A1DGG,118, 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 SC28L201A1DGG,118 part is unused and in its original packaging.
Return procedure for SC28L201A1DGG,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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