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NXP Semiconductors SC16C554IB80,557
- Part No.:
- SC16C554IB80,557
- Manufacturer:
- NXP Semiconductors
- Package:
- 80-LQFP
- Datasheet:
-
SC16C554IB80,557.pdf
- Description:
- IC UART QUAD 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,381
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Product details
Overview
SC16C554IB80,557 from NXP Semiconductors (formerly Philips) is a quad UART IC with integrated 16-byte transmit/receive FIFOs and IrDA infrared encoder/decoder functionality. It operates at 5 V, 3.3 V, or 2.5 V, supports up to 5 Mbit/s serial data rates, and interfaces via Intel- or Motorola-style parallel buses. It serves as a high-throughput serial bridge in industrial control panels requiring multi-channel RS-232/RS-485 modem interfacing with hardware flow control.
For engineers reviewing the SC16C554IB80,557 datasheet, SC16C554IB80,557 pinout, SC16C554IB80,557 application, or SC16C554IB80,557 equivalent, key selection criteria include LQFP80 package compatibility, 16/68 bus mode configuration, IrDA support, FIFO trigger level programmability, and auto RTS/CTS hardware flow control implementation across four independent UART channels.
Technical Context
The SC16C554IB80,557 implements four independent asynchronous serial channels with fully programmable character formatting (5–8-bit data, 1/1.5/2 stop bits, even/odd/no parity) and standard framing (start/stop/parity/break). Its dual-mode interface-selectable via the 16/68 pin-supports both Intel-style (IOR/IOW/CSA–CSD) and Motorola-style (R/W/CS/A3–A4) bus protocols on the same die.
Internally, it integrates a programmable baud rate generator (DC to 5 Mbit/s), enhanced feature register (EFR) for flow control enablement, and dedicated status registers for line, modem, and error reporting. The device provides wire-ORed TXRDY/RXRDY outputs and supports DMA transfers via FIFO trigger levels and ready signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 4 independent UARTs with separate TX/RX, CTS/RTS, and modem control lines |
| FIFO depth | 16-byte transmit and receive FIFO per channel; reduces CPU interrupt load in burst-data applications |
| Max data rate | 5 Mbit/s at 5 V/3.3 V; 3 Mbit/s at 2.5 V - enables high-speed modem and networking links |
| Interface modes | Configurable 16-mode (Intel) or 68-mode (Motorola); selected by 16/68 pin logic level |
| IrDA support | Integrated infrared encoder/decoder compliant with IrDA 1.0 physical layer standards |
| Supply voltage | 2.5 V, 3.3 V, or 5 V operation - supports mixed-voltage system integration |
| Temperature range | Industrial grade: −40 °C to +85 °C - suitable for embedded control and factory automation |
Pinout & Package
LQFP80 package: plastic low-profile quad flat package, 80 leads, body size 12 × 12 × 1.4 mm (SOT315-1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXA–TXD | Transmit data outputs (A–D) | Active-HIGH serial output per channel; disabled during reset or local loop-back |
| RXA–RXD | Receive data inputs (A–D) | Active-HIGH serial input per channel; internally connected to TX in loop-back mode |
| RTSA–RTSD | Request-to-Send outputs (A–D) | Active-LOW hardware flow control signals; controlled by EFR[6] and FIFO fill level |
| CTSA–CTSD | Clear-to-Send inputs (A–D) | Active-LOW remote flow control inputs; suspend TX when asserted (EFR[7] enabled) |
| CSA–CSD | Chip select inputs (A–D) | Active-LOW 16-mode selects individual UARTs; not used in 68-mode |
| A0–A2 | Address select bits | Select internal register address (THR, IER, FCR, LCR, etc.) in both 16- and 68-modes |
| 16/68 | Interface mode select | Logic HIGH = 16-mode (Intel); Logic LOW = 68-mode (Motorola); not present on LQFP64 |
| TXRDY / RXRDY | Transmit/Receive Ready outputs | Active-LOW wire-OR of all four channels' FIFO/THR/RHR status - simplifies interrupt polling |
| XTAL1 / XTAL2 | Clock input/output | Supports crystal (up to 24 MHz) or external clock source for precise baud rate generation |
Key Features
| Feature | Design Value |
|---|---|
| Auto hardware flow control | Enables RTS/CTS handshaking per channel via EFR bits - eliminates software polling overhead |
| Four selectable FIFO trigger levels | Allows tuning of RX interrupt frequency (1/4/8/14 bytes) to match host CPU latency and buffer management |
| Sleep mode | Reduces power consumption during idle periods while retaining register state and wake-on-RX capability |
| Internal loop-back diagnostics | Validates UART functional integrity without external cabling - critical for field-deployed equipment self-test |
| Programmable Xon/Xoff characters | Supports two independent Xon/Xoff word pairs (16-bit each) for robust software flow control negotiation |
Applications
| Industrial HMI Terminal | Multi-Port Serial Server |
|---|---|
Use Scenario: A panel-mounted human-machine interface connects to four PLCs via isolated RS-232 ports. IC Role / Device Role / Timing Role: SC16C554IB80,557 acts as the central serial protocol bridge, managing simultaneous bidirectional communication with hardware flow control and IrDA debug port. Use Value: 16-byte FIFOs prevent data loss during CPU context switches; 5 Mbit/s capability supports fast firmware updates over serial link. | Use Scenario: Rack-mounted Ethernet-to-serial gateway routes TCP/IP traffic to legacy serial devices across eight physical ports. IC Role / Device Role / Timing Role: Two SC16C554IB80,557 ICs provide eight UART channels with shared DMA access and synchronized interrupt handling. Use Value: Wire-ORed TXRDY/RXRDY signals reduce GPIO count; IrDA interface enables secure local configuration without opening enclosure. |
| Medical Diagnostic Equipment | Telecom Base Station OAM |
Use Scenario: Ultrasound machine uses four serial links to coordinate transducer array calibration, thermal sensor monitoring, and service port logging. IC Role / Device Role / Timing Role: SC16C554IB80,557 handles time-critical serial telemetry streams with deterministic latency via programmable FIFO triggers and priority interrupt routing. Use Value: Industrial temperature range ensures reliability inside sealed chassis; sleep mode extends battery backup runtime during standby. | Use Scenario: Cellular base station controller requires out-of-band management via four independent modem links for remote site provisioning and fault reporting. IC Role / Device Role / Timing Role: SC16C554IB80,557 manages AT-command-based modem handshaking, carrier detection (CD), ring indicator (RI), and DTR/DSR signaling per channel. Use Value: Full modem control register set (MCR/MSR) and false start-bit detection improve connection stability in noisy RF environments. |
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; no IrDA encoder/decoder; max 3 Mbit/s at 3.3 V; lacks sleep mode | Requires external IrDA PHY for infrared use; lower max data rate limits high-speed modem use | Choose when IrDA is unnecessary and cost sensitivity outweighs feature set |
| ST16C554CJ | PLCC68 package; identical 16-byte FIFO and IrDA support; 5 V only; no 2.5 V operation | Not pin-compatible due to different package and pin count; requires PCB redesign | Choose only if legacy PLCC68 footprint and 5 V-only supply are acceptable |
Compared with TL16C554IPN and ST16C554CJ, the SC16C554IB80,557 uniquely combines LQFP80 packaging, triple-voltage operation (2.5/3.3/5 V), integrated IrDA PHY, and sleep mode - making it optimal for space-constrained, power-aware, infrared-capable industrial gateways.
Availability
SC16C554IB80,557 is available at Aetrix Electronics and suitable for industrial HMI terminals, multi-port serial servers, medical diagnostic equipment, and telecom base station OAM requiring stable component supply across extended product lifecycles.
Supply support for SC16C554IB80,557 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.
The SC16C554IB80,557 belongs to NXP's legacy high-performance UART product line, designed specifically for demanding multi-channel serial infrastructure in industrial control, medical instrumentation, and telecom management systems.
FAQ
What bus interface modes does the SC16C554IB80,557 support?
The SC16C554IB80,557 supports both Intel-style 16-mode (using IOR/IOW/CSA–CSD) and Motorola-style 68-mode (using R/W/CS/A3–A4), selected by the 16/68 pin. In 16-mode, it behaves like a standard 16C554; in 68-mode, it emulates the 68C554. This dual-mode capability allows drop-in replacement in diverse microprocessor architectures without redesigning the host interface logic.
Does the SC16C554IB80,557 include infrared (IrDA) functionality?
Yes, the SC16C554IB80,557 integrates a full IrDA 1.0-compliant encoder/decoder, enabling direct infrared communication without external PHY components. This built-in capability supports 9.6 kbit/s to 115.2 kbit/s SIR modes and eliminates the need for discrete IrDA transceivers in portable diagnostic tools, service ports, and secure configuration interfaces.
How many UART channels does the SC16C554IB80,557 provide, and what is the FIFO depth per channel?
The SC16C554IB80,557 provides four independent UART channels (A–D), each with a dedicated 16-byte transmit FIFO and 16-byte receive FIFO. Each receive FIFO includes error flags (break, parity, framing, overrun), and both FIFOs support programmable trigger levels - enabling efficient burst-data handling and reduced CPU interrupt frequency in real-time systems.
What is the maximum serial data rate supported by the SC16C554IB80,557?
The SC16C554IB80,557 supports up to 5 Mbit/s at 5 V and 3.3 V supply voltages, 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 maximum achievable rate is 1.5 Mbit/s. These rates enable compatibility with high-speed modems, ISDN terminal adapters, and proprietary high-throughput serial protocols.
Is the SC16C554IB80,557 pin-compatible with other industry-standard quad UARTs?
The SC16C554IB80,557 is pin-compatible with the ST16C554 and TL16C554 in the same LQFP80 package, but not with PLCC68 or LQFP64 variants. Pin compatibility applies strictly to signal mapping, power, and ground pins - however, the 16/68 mode select pin and IrDA functionality are unique to the SC16C554/554D family and require verification in existing designs before substitution.
SC16C554IB80,557 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-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:
- 80-LQFP (12x12)
SC16C554IB80,557 FAQ
1.How can I place an order for SC16C554IB80,557 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C554IB80,557 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 SC16C554IB80,557 reliable?
The price and inventory of SC16C554IB80,557 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C554IB80,557 is usually 5 days.
3.What payment methods are accepted for SC16C554IB80,557?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C554IB80,557 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C554IB80,557?
SC16C554IB80,557 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C554IB80,557 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 SC16C554IB80,557?
For technical support, including SC16C554IB80,557 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C554IB80,557 requirements.
6.How does Aetrix verify that SC16C554IB80,557 is sourced from the original manufacturer or authorized distributors?
All SC16C554IB80,557 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 SC16C554IB80,557 meets industry standards.
7.What is the process for return or replacement of SC16C554IB80,557?
All SC16C554IB80,557 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C554IB80,557, 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 SC16C554IB80,557 part is unused and in its original packaging.
Return procedure for SC16C554IB80,557:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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