Interface - UARTs (Universal Asynchronous Receiver Transmitter)

Part Number	Description / PDF	Quantity
SC28L92A1A,512 NXP Semiconductors	IC UART DUAL W/FIFO 44-PLCC	0
SC16C2550BIB48,157 NXP Semiconductors	IC UART DUAL W/FIFO 48-LQFP	2380
SC28L91A1B,551 NXP Semiconductors	SERIAL I/O CONTROLLER	0
SC28L194A1A,512 NXP Semiconductors	IC UART QUAD W/FIFO 68-PLCC	0
SC16C554DBIA68,518 NXP Semiconductors	IC UART QUAD 68PLCC	0
SC26C92A1B551 NXP Semiconductors	SERIAL I/O CONTROLLER	56
SC16C554BIB64,157 NXP Semiconductors	IC UART QUAD 64LQFP	0
SC26C92C1A,529 NXP Semiconductors	IC DUART 1MBPS 44PLCC	312
SC16C754BIBM,157 NXP Semiconductors	IC UART QUAD 64BYTE 64LQFP	0
SC16C752BIBS,157 NXP Semiconductors	IC DUAL UART 64BYTE 32HVQFN	5543
SC16IS741AIPWJ NXP Semiconductors	IC UART SGL I2C BUS SPI 16TSSOP	15192
SC16C654BIA68,529 NXP Semiconductors	IC QUAD UART 64BYTE 68PLCC	162
SC26C92A1A,518 NXP Semiconductors	IC DUART 1MBPS 44PLCC	0
SC26C92C1A,512 NXP Semiconductors	IC UART DUAL W/FIFO 44-PLCC	3496
SC28L194A1BE,557 NXP Semiconductors	IC UART QUAD W/FIFO 80-LQFP	0
SC16C654BIA68,512 NXP Semiconductors	ID QUAD UART 64BYTE 68PLCC	940
SC16C652BIBS,151 NXP Semiconductors	IC ENCODER/DECODER IRDA 32HVQFN	0
SC28L198A1BE,557 NXP Semiconductors	IC UART OCTAL W/FIFO 100-LQFP	0
SC28L92A1B,551 NXP Semiconductors	IC UART DUAL W/FIFO 44QFP	262
SC26C92A1A,512 NXP Semiconductors	IC UART DUAL W/FIFO 44-PLCC	3648

Interface - UARTs (Universal Asynchronous Receiver Transmitter)

1. Overview

UART (Universal Asynchronous Receiver Transmitter) is a digital integrated circuit that converts parallel data to serial format for transmission and vice versa. It implements asynchronous serial communication protocols using start/stop bits without shared clock signals. UARTs play critical roles in device-to-device communication across industrial automation, consumer electronics, IoT devices, and automotive systems due to their simplicity, reliability, and cost-effectiveness.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Standard UART	Basic async serial conversion, 8N1 format support	PC serial ports, sensor interfaces
Multi-channel UART	Supports multiple independent serial channels	Industrial controllers, server management
High-speed UART	Operates at >1Mbps baud rates	Wireless modems, industrial Ethernet gateways
FIFO UART	Integrated transmit/receive buffers (16-256 bytes)	Embedded systems, IoT hubs
IrDA UART	Infrared data association protocol support	Wireless payment terminals, remote controls

3. Structure & Composition

Typical UART architecture includes:

Transmitter section with parallel-to-serial converter
Receiver section with serial-to-parallel converter
Programmable baud rate generator
Control logic for data format configuration
Optional FIFO buffers and flow control (RTS/CTS)

Available in standard packages (DIP, SOIC) and QFN formats. High integration level devices may include GPIOs and clock generators.

4. Key Technical Specifications

Parameter	Importance
Baud Rate Range (110-921.6kbps)	Determines communication speed compatibility
Data Bits (5-8 bits)	Affects payload capacity
Stop Bits (1-2 bits)	Impacts timing tolerance
Parity Check (Even/Odd/None)	Error detection capability
Operating Voltage (1.8-5V)	System power supply compatibility
Package Type	PCB space and thermal requirements

5. Application Fields

Telecommunications: Modems, ISDN terminals
Industrial Automation: PLCs, SCADA systems
Consumer Electronics: Smart meters, wearable devices
Medical Devices: Patient monitors, diagnostic equipment
Automotive: OBD-II interfaces, telematics units

6. Leading Manufacturers & Products

Manufacturer	Representative Product	Key Features
TI	TL16C750B	16-byte FIFO, 1.5Mbps, industrial temp range
NXP	SC16IS752	I2C/SPI interface, 2-channel, 5Mbps
Microchip	MCP2200	USB-to-UART bridge, on-chip EEPROM
STMicro	ST16C550	256-byte FIFO, 5V tolerant I/O
Infineon	KINetis UART	Automotive qualified, LIN bus support

7. Selection Recommendations

Consider these factors when selecting UART ICs:

Match baud rate requirements with system clock capabilities
Verify data format compatibility (bits/parity/stop)
Assess interface voltage levels (3.3V vs 5V)
Evaluate operating temperature range for industrial/environmental applications
Consider package size constraints (QFN vs TSSOP)
Check FIFO depth requirements for high-speed applications
Analyze need for additional features (IrDA, LIN, GPIO)
Compare power consumption specifications for battery-operated devices

8. Industry Trends

Future development directions include:

Increased integration with wireless interfaces (Bluetooth/Wi-Fi)
Higher speed capabilities (>10Mbps) for industrial IoT
Lower power consumption through advanced CMOS processes
Enhanced protocol support (CANbus, Ethernet integration)
Smart UARTs with built-in security features (AES encryption)
Standardization of UART-over-USB solutions

Market growth driven by automotive electronics and industrial automation demands, with projected CAGR of 6.2% through 2027 (Source: Grand View Research).