My Inquiry
My Account
NXP Semiconductors SC16C554IB64,157
- Part No.:
- SC16C554IB64,157
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-LQFP
- Datasheet:
-
SC16C554IB64,157.pdf
- Description:
- IC UART QUAD W/FIFO 64-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,620
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC16C554IB64 from NXP Semiconductors (formerly Philips) is a quad UART IC with 16-byte transmit/receive FIFOs, IrDA infrared encoder/decoder, and dual-bus interface support (Intel 16-mode only). It operates at 5 V / 3.3 V / 2.5 V, supports up to 5 Mbit/s data rate, and delivers hardware/software flow control for multi-channel serial communication in industrial embedded systems.
For engineers reviewing the SC16C554IB64 datasheet, SC16C554IB64 pinout, SC16C554IB64 application, or SC16C554IB64 equivalent, this device serves as a drop-in upgrade path from ST16C554/TL16C554 in LQFP64 footprint, enabling higher throughput via FIFO-triggered interrupts, automatic RTS/CTS management, and IrDA-compliant baseband modulation without external transceivers.
Technical Context
The SC16C554IB64 implements four independent asynchronous serial channels sharing a common 8-bit bidirectional data bus (D0–D7), address decoding (A0–A2), and Intel-style control signals (IOR/IOW/CSA–CSD). Its architecture includes dedicated 16-byte FIFO buffers per channel, programmable baud rate generator with divisor latch registers (DLL/DLM), and enhanced feature register (EFR) enabling auto-flow control and Xon/Xoff character detection.
It integrates full modem control logic (RTS/CTS/DSR/DTR/RI/DCD), line status reporting (LSR), interrupt prioritization (INTA–INTD), and internal loop-back diagnostics. The LQFP64 package supports only 16-mode operation - eliminating 68-mode pins (A3/A4, IRQ, R/W) and bonding INTSEL to GND to enable MCR[3]-controlled 3-state interrupt outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 5 Mbit/s at 5 V/3.3 V; 3 Mbit/s at 2.5 V - enables high-speed modem and network interface links without external clock multiplication. |
| FIFO Depth | 16-byte TX/RX FIFO per channel - reduces CPU interrupt load by ~8× vs legacy 1-byte-buffer UARTs in burst-traffic applications. |
| Supply Voltage | 2.5 V / 3.3 V / 5 V operation - supports mixed-voltage system integration and legacy 5 V board upgrades with no level-shifting. |
| Interface Mode | Intel 16-mode only (no 68-mode support) - simplifies PCB layout with fixed IOR/IOW/CSA–CSD pin mapping and eliminates mode-select logic. |
| IrDA Support | Integrated IrDA 1.0 encoder/decoder - performs baseband pulse shaping and demodulation internally; requires only external IR LED/photodiode. |
| Interrupt Architecture | Four independent active-HIGH interrupt outputs (INTA–INTD) - allows per-channel interrupt routing and priority handling in real-time OS environments. |
| Operating Temperature | Industrial range (−40 °C to +85 °C) - validated for deployment in factory automation, point-of-sale terminals, and telecom infrastructure equipment. |
Pinout & Package
LQFP64 package (SOT314-2), 10 × 10 × 1.4 mm body, 64-pin quad flat with exposed thermal pad (not electrically connected). Pinout conforms strictly to 16-mode interface: no A3/A4, IRQ, or R/W pins; INTSEL bonded to GND; CSA–CSD enable individual UART channel selection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D7 | 8-bit bidirectional data bus | Transfers register contents between CPU and UART; 3-state drive enables shared bus topology. |
| A0–A2 | Register address select | Selects among THR/RHR, IER/ISR, FCR, LCR, MCR/MSR, LSR, SPR, DLL/DLM, EFR, and Xon/Xoff registers. |
| CSA–CSD | Per-channel chip select (active-low) | Enables data transfer to UART A/B/C/D independently; supports discrete channel addressing without address decoding logic. |
| INTA–INTD | Individual channel interrupt output | Asserts active-HIGH when RX FIFO trigger, TX empty, line error, or modem status change occurs on respective channel. |
| TXA–TXD / RXA–RXD | Serial transmit/receive I/O | Full-duplex TTL-level serial interfaces; support RS-232/RS-422 with external level shifters or direct IrDA baseband connection. |
| RTSA–RTSD / CTSA–CTSD | Hardware flow control I/O | Active-LOW RTS outputs and CTS inputs - enable automatic buffer management when EFR[6:7] = 11b. |
| XTAL1/XTAL2 | Crystal oscillator interface | Accepts 1–24 MHz crystal or external clock; generates baud rates from DC to 5 Mbit/s via programmable divisor latch. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte FIFO per channel | Reduces CPU polling frequency and interrupt overhead in multi-port terminal servers and industrial gateways. |
| Programmable FIFO trigger levels | Four selectable RX interrupt thresholds (1/4/8/14 bytes) allow tuning latency vs. interrupt density for specific traffic profiles. |
| Auto hardware/software flow control | Eliminates lost frames during burst transmission by synchronizing RTS/CTS or injecting Xon/Xoff without firmware intervention. |
| IrDA 1.0 baseband encoder/decoder | Offloads pulse shaping (3/16 or 1.6 µs encoding) and demodulation from host processor; compliant with IrDA physical layer spec. |
| Modem control signal set | Full DTR/DSR/RTS/CTS/RI/DCD support enables direct connection to PSTN modems, fax machines, and legacy telecom peripherals. |
| Sleep mode | Reduces quiescent current below 10 µA - extends battery life in portable diagnostic tools and handheld field instruments. |
Applications
| Industrial HMI Terminal | Multi-Port Serial Server |
|---|---|
|
Use Scenario: Embedded panel PC connecting to PLCs, barcode scanners, and weighing scales via RS-232/422. IC Role / Device Role / Timing Role: Quad UART bridges parallel CPU bus to four isolated serial peripherals; manages timing-critical command/response cycles. Use Value: 16-byte FIFOs prevent data loss during simultaneous polling of multiple devices; IrDA enables wireless configuration updates. |
Use Scenario: Network-attached device aggregating serial data from HVAC controllers, energy meters, and access readers. IC Role / Device Role / Timing Role: Central serial interface IC converting UART streams to TCP/IP packets; handles concurrent full-duplex sessions. Use Value: Independent INTA–INTD outputs simplify Linux kernel driver IRQ handling; auto-CTS prevents buffer overflow across all ports. |
| Point-of-Sale Kiosk | Medical Diagnostic Instrument |
|
Use Scenario: Retail kiosk interfacing magnetic stripe reader, receipt printer, and PIN pad over separate serial links. IC Role / Device Role / Timing Role: Serial protocol translator and flow controller ensuring deterministic response time for PCI-compliant transactions. Use Value: Hardware RTS/CTS coordination guarantees zero-frame-loss printing; sleep mode cuts standby power in unattended kiosks. |
Use Scenario: Portable ultrasound or ECG unit requiring wired data export and wireless setup via IR. IC Role / Device Role / Timing Role: Dual-role interface: RS-232 for PC sync and IrDA for clinician-configurable parameter loading. Use Value: Integrated IrDA encoder eliminates external SIR/FIR PHY; 2.5 V operation matches low-power medical SoC voltage rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad UART applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST16C554CJ68 | PLCC68 package; supports both 16-mode and 68-mode; lacks integrated IrDA encoder/decoder. | Requires external IrDA PHY for infrared use; suitable where board space allows larger package and dual-bus flexibility is needed. | Choose when migrating legacy PLCC designs or needing Motorola bus compatibility. |
| TL16C554IPN | LQFP80 package; 16-mode only; no IrDA functionality; rated for commercial temperature range (0 °C to 70 °C). | Cannot support infrared communication; limited to benign-environment deployments like office equipment or lab instruments. | Choose for cost-sensitive, non-industrial applications where IrDA and extended temp range are unnecessary. |
Compared with ST16C554CJ68 and TL16C554IPN, the SC16C554IB64 uniquely combines LQFP64 compactness, industrial temperature rating, and on-die IrDA baseband processing - reducing BOM count and PCB area while enabling wireless configuration in harsh environments.
Availability
SC16C554IB64 is available at Aetrix Electronics and suitable for industrial HMI terminals, multi-port serial servers, point-of-sale kiosks, medical diagnostic instruments, and telecom infrastructure requiring stable component supply across long production lifecycles.
Supply support for SC16C554IB64 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, formerly Philips Semiconductors, is a global leader in high-performance mixed-signal ICs for automotive, industrial, and communication markets, with deep expertise in serial interface and connectivity solutions.
The SC16C554IB64 belongs to NXP's legacy UART product line designed for robust, multi-channel serial communication in industrial control, instrumentation, and embedded networking - emphasizing reliability, pin compatibility, and backward interoperability.
FAQ
What is the maximum data rate supported by the SC16C554IB64?
The SC16C554IB64 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 are confirmed in the official Philips SC16C554/554D Product Data Rev. 05 (2004), Section 6.
Does the SC16C554IB64 support both Intel and Motorola bus interfaces?
No, the SC16C554IB64 supports Intel 16-mode only. Its LQFP64 package omits pins required for 68-mode operation (A3, A4, IRQ, R/W) and bonds INTSEL to GND to enable MCR[3]-controlled interrupt outputs. This is explicitly stated in Section 5.1.2 (LQFP64 pin configuration) and Section 6 of the datasheet.
How does the IrDA functionality work in the SC16C554IB64?
The SC16C554IB64 integrates an IrDA 1.0-compliant baseband encoder/decoder that performs pulse shaping (3/16 or 1.6 µs encoding) and demodulation internally. It requires only an external IR LED and photodiode - no additional PHY IC. This capability is documented in the device description (Section 1) and functional overview (Section 6).
What are the key differences between SC16C554IB64 and SC16C554DIB64?
The SC16C554IB64 bonds INTSEL to GND for MCR[3]-controlled interrupts, while SC16C554DIB64 bonds INTSEL to VCC for continuous interrupt enable mode. Both share identical pinout, LQFP64 package, and 16-mode-only operation. This distinction is specified in Section 6 of the datasheet under "Interrupt Select (INTSEL)" and ordering information Table 1.
Can the SC16C554IB64 be used in 2.5 V systems?
Yes, the SC16C554IB64 is fully specified for 2.5 V operation, including all logic thresholds, timing parameters, and 3 Mbit/s maximum data rate. Its triple-voltage capability (2.5 V / 3.3 V / 5 V) is highlighted in Section 2 (Features) and Section 6 (Functional Description) of the datasheet.
SC16C554IB64,157 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- -
- Packaging:
- Bag
- 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)
SC16C554IB64,157 FAQ
1.How can I place an order for SC16C554IB64,157 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C554IB64,157 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 SC16C554IB64,157 reliable?
The price and inventory of SC16C554IB64,157 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C554IB64,157 is usually 5 days.
3.What payment methods are accepted for SC16C554IB64,157?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C554IB64,157 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C554IB64,157?
SC16C554IB64,157 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C554IB64,157 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 SC16C554IB64,157?
For technical support, including SC16C554IB64,157 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C554IB64,157 requirements.
6.How does Aetrix verify that SC16C554IB64,157 is sourced from the original manufacturer or authorized distributors?
All SC16C554IB64,157 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 SC16C554IB64,157 meets industry standards.
7.What is the process for return or replacement of SC16C554IB64,157?
All SC16C554IB64,157 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C554IB64,157, 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 SC16C554IB64,157 part is unused and in its original packaging.
Return procedure for SC16C554IB64,157:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C554IB64,157 Tags
-
SC16IS741AIPWJ
NXP Semiconductors
-
TL16C550CPTR
Texas Instruments
-
TL16C550CIPTR
Texas Instruments
-
SC16C752BIB48,128
NXP Semiconductors
-
ST16C2550CQ48-F
MaxLinear, Inc.
-
ST16C2550CJ44-F
MaxLinear, Inc.
-
ST16C2552CJ44-F
MaxLinear, Inc.
-
ST16C1550IQ48-F
MaxLinear, Inc.
-
ST16C2550IQ48-F
MaxLinear, Inc.
-
ST16C554DIQ64-F
MaxLinear, Inc.
-
ST16C554DCQ64-F
MaxLinear, Inc.
-
XR17V352IB113-F
MaxLinear, Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
