My Inquiry
My Account
NXP Semiconductors SC16C554IB64,128
- Part No.:
- SC16C554IB64,128
- Manufacturer:
- NXP Semiconductors
- Package:
- 64-LQFP
- Datasheet:
-
SC16C554IB64,128.pdf
- Description:
- IC UART QUAD 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,647
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 rates, and delivers four independent asynchronous serial channels for industrial communication systems requiring high-throughput, low-CPU-overhead serial I/O.
For engineers reviewing the SC16C554IB64 datasheet, SC16C554IB64 pinout, SC16C554IB64 application, or SC16C554IB64 equivalent, this device serves as a drop-in upgrade path from legacy 16C454/554 designs-offering FIFO-triggered interrupts, automatic hardware/software flow control, and integrated IrDA physical layer support without PCB layout changes in LQFP64 footprint designs.
Technical Context
The SC16C554IB64 implements four independent UART channels sharing a single 8-bit bidirectional data bus (D0–D7), with individual chip select lines (CSA–CSD) and interrupt outputs (INTA–INTD) for Intel-style 16-mode operation. Its internal architecture includes programmable baud rate generators, enhanced feature registers (EFR), and dedicated FIFO control logic enabling configurable receive trigger levels (1/4/8/14 bytes) and DMA-ready TXRDY/RXRDY signaling.
It integrates full modem control (RTS/CTS/DSR/DTR/RI/CD), false start-bit detection, line break generation/detection, and on-chip loop-back diagnostics. The device supports sleep mode and provides complete status reporting via LSR, MSR, and ISR registers-enabling robust error handling (overrun, parity, framing, break) and prioritized interrupt servicing per channel.
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 networking interfaces without external clock multiplication. |
| FIFO Depth | 16-byte TX + 16-byte RX per channel - reduces CPU polling frequency by >80% vs. legacy 1-byte-buffer UARTs in multi-channel systems. |
| Interface Mode | Intel 16-mode only (no 68-mode support) - uses CSA–CSD chip selects and INTA–INTD per-channel interrupts; compatible with standard x86/8051 bus timing. |
| IrDA Support | Integrated encoder/decoder per channel - eliminates need for external IrDA PHY; compliant with IrDA 1.0 physical layer specifications. |
| Supply Voltage | 2.5 V / 3.3 V / 5 V operation - allows direct integration into mixed-voltage industrial embedded systems without level-shifting circuitry. |
| Temperature Range | Industrial grade (−40 °C to +85 °C) - qualified for deployment in factory automation, POS terminals, and telecom infrastructure equipment. |
| Package | LQFP64 (10 × 10 × 1.4 mm, SOT314-2) - surface-mount package with 0.5 mm pitch; pin-compatible replacement for ST16C554 and TL16C554 in same footprint. |
Pinout & Package
LQFP64 package (SOT314-2), 10 mm × 10 mm body, 0.5 mm lead pitch, exposed pad not specified. Operates exclusively in 16-mode interface configuration with no 68-mode pins (e.g., A3/A4, R/W, IRQ) present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CSA–CSD | Individual channel chip select (Active-Low) | Selects UART A/B/C/D independently; enables simultaneous access to multiple channels without address decoding logic. |
| INTA–INTD | Per-channel interrupt output (Active-High) | Signals TX empty, RX ready, or error conditions per UART; eliminates software polling and enables deterministic real-time response. |
| TXA–TXD / RXA–RXD | Serial transmit/receive I/O | Four independent full-duplex asynchronous serial ports; each supports start/stop/parity framing and IrDA modulation. |
| RTSA–RTSD / CTSA–CTSD | Hardware flow control signals | Enables automatic RTS/CTS handshaking per channel when EFR[6:7] enabled; prevents buffer overflow in high-throughput applications. |
| D0–D7 | 8-bit bidirectional data bus | Shared parallel interface to host processor; 3-state drive allows connection to multiplexed system buses without contention. |
| A0–A2 | Internal register address select | Accesses THR/RHR, IER/ISR, FCR, LCR, MCR, LSR, MSR, SPR, and baud divisor registers via standard 16C554 addressing map. |
| XTAL1/XTAL2 | Crystal oscillator input/output | Supports 1–24 MHz crystal or external clock; enables precise baud rate generation from DC to 5 Mbit/s using programmable divisor latches. |
Key Features
| Feature | Design Value |
|---|---|
| 16-byte TX/RX FIFO per channel | Reduces host CPU interrupt load by ~94% compared to 1-byte buffers; supports burst transfers and DMA coexistence. |
| Four selectable RX FIFO trigger levels | Configurable thresholds (1/4/8/14 bytes) allow tuning of interrupt latency vs. CPU overhead for specific protocol stack requirements. |
| Automatic hardware/software flow control | Eliminates lost characters during high-speed transfers; hardware CTS/RTS and Xon/Xoff character detection operate concurrently per channel. |
| Integrated IrDA encoder/decoder | Provides full 115.2 kbit/s IrDA 1.0 physical layer compliance per UART; removes need for discrete IrPHY ICs and associated passive components. |
| Full modem control interface | Supports DTR/DSR/RTS/CTS/RI/CD signals per channel - enables direct connection to RS-232 transceivers and legacy modems without glue logic. |
| Sleep mode with wake-on-RX | Reduces quiescent current to <10 µA while retaining ability to detect incoming start bits - extends battery life in portable industrial devices. |
Applications
| Industrial Serial Gateway | POS Terminal Communication Hub |
|---|---|
|
Use Scenario: Aggregating serial data from multiple PLCs, barcode scanners, and weight scales into a central controller via RS-485/RS-232 links. IC Role / Device Role / Timing Role: Quad UART handles four concurrent serial streams with independent baud rates, FIFO buffering, and hardware flow control per port. Use Value: Eliminates need for four discrete UARTs or FPGA-based bridging logic; reduces BOM cost by 60% and PCB area by 45% versus dual-SC16C550 solutions. |
Use Scenario: Enabling simultaneous communication between cash drawer, receipt printer, magnetic stripe reader, and PIN pad in retail point-of-sale systems. IC Role / Device Role / Timing Role: Provides four isolated, interrupt-driven serial interfaces with IrDA support for contactless payment peripherals. Use Value: Enables true plug-and-play peripheral expansion without CPU resource contention; IrDA capability supports EMV-compliant wireless card readers. |
| Telecom Line Card Interface | Medical Device Data Logger |
|
Use Scenario: Interfacing legacy T1/E1 framing equipment, alarm panels, and remote management consoles in telecom central office line cards. IC Role / Device Role / Timing Role: Acts as serial protocol bridge between microcontroller and multiple out-of-band management ports with strict timing and error recovery. Use Value: Built-in false start-bit detection and line break generation ensure reliable command/response integrity over noisy telco wiring environments. |
Use Scenario: Collecting time-stamped sensor data (ECG, SpO₂, NIBP) from analog front-ends and transmitting via RS-232 to PC-based analysis software. IC Role / Device Role / Timing Role: Provides deterministic, low-jitter serial transmission with programmable stop bits and parity formats required by FDA-regulated medical protocols. Use Value: Sleep mode and wake-on-RX reduce power consumption by 70% during idle periods - critical for battery-powered portable diagnostic tools. |
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 (68-pin); supports both 16-mode and 68-mode interfaces; lacks IrDA encoder/decoder. | Requires PCB redesign for LQFP64 footprint; suitable for Motorola bus systems but not IrDA-enabled designs. | Choose when migrating from legacy PLCC-based systems or when 68-mode compatibility is required. |
| TL16C554IPN | 64-pin LQFP package; identical pinout to SC16C554IB64; no IrDA support; max data rate 3 Mbit/s at 3.3 V. | Drop-in replacement for non-IrDA applications; lower maximum speed limits use in high-speed modem interfaces. | Choose when IrDA functionality is unnecessary and cost sensitivity outweighs performance headroom. |
Compared with ST16C554CJ68 and TL16C554IPN, the SC16C554IB64 uniquely combines LQFP64 footprint compatibility, IrDA PHY integration, and 5 Mbit/s operation - making it the only option for space-constrained, infrared-capable, high-throughput quad UART designs without package or interface compromise.
Availability
SC16C554IB64 is available at Aetrix Electronics and suitable for industrial serial gateways, POS terminal communication hubs, telecom line card interfaces, and medical device data loggers requiring stable component supply across extended product 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in legacy Philips logic and interface products.
The SC16C554IB64 belongs to NXP's industrial UART family, designed specifically for high-reliability embedded systems needing multi-channel, low-power, and protocol-flexible serial communication - especially where legacy 16C454/554 upgrades and IrDA integration are critical.
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 is achieved using an external clock input; with a 24 MHz crystal, the maximum achievable rate is 1.5 Mbit/s. These rates apply per UART channel and are fully programmable via the divisor latch registers (DLL/DLM).
Does the SC16C554IB64 support both Intel and Motorola bus interfaces?
No - the SC16C554IB64 operates exclusively in Intel 16-mode interface configuration. It uses individual chip select lines (CSA–CSD) and per-channel interrupts (INTA–INTD), and does not expose 68-mode pins (A3/A4, R/W, IRQ). The LQFP64 package variant is hardwired for 16-mode operation only.
How does the IrDA functionality work in the SC16C554IB64?
The SC16C554IB64 integrates a full IrDA 1.0-compliant encoder/decoder per UART channel. It accepts standard UART serial data and performs pulse-width modulation (8/16 µs) and RZI encoding for transmission, and decodes incoming IrDA signals into standard NRZ serial data - eliminating the need for external IrPHY ICs or discrete IR components.
Can the SC16C554IB64 be used as a direct replacement for the ST16C554?
Yes - the SC16C554IB64 is explicitly stated as pin compatible with the ST16C554 and TL16C554 in LQFP64 packages. It powers up functionally equivalent to the 16C454 and adds enhanced features (FIFOs, IrDA, auto-flow control) via register programming, requiring no hardware changes in existing ST16C554 designs.
What power supply voltages does the SC16C554IB64 support?
The SC16C554IB64 supports three nominal supply voltages: 2.5 V, 3.3 V, and 5 V. It operates across the full industrial temperature range (−40 °C to +85 °C) at all three voltages, with corresponding data rate limitations: 3 Mbit/s maximum at 2.5 V, and 5 Mbit/s maximum at 3.3 V and 5 V.
SC16C554IB64,128 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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)
SC16C554IB64,128 FAQ
1.How can I place an order for SC16C554IB64,128 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC16C554IB64,128 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 SC16C554IB64,128 reliable?
The price and inventory of SC16C554IB64,128 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC16C554IB64,128 is usually 5 days.
3.What payment methods are accepted for SC16C554IB64,128?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC16C554IB64,128 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC16C554IB64,128?
SC16C554IB64,128 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC16C554IB64,128 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 SC16C554IB64,128?
For technical support, including SC16C554IB64,128 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC16C554IB64,128 requirements.
6.How does Aetrix verify that SC16C554IB64,128 is sourced from the original manufacturer or authorized distributors?
All SC16C554IB64,128 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 SC16C554IB64,128 meets industry standards.
7.What is the process for return or replacement of SC16C554IB64,128?
All SC16C554IB64,128 units undergo pre-shipment inspection (PSI). If there is an issue with SC16C554IB64,128, 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 SC16C554IB64,128 part is unused and in its original packaging.
Return procedure for SC16C554IB64,128:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC16C554IB64,128 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…
