SC16C654DBIB64,157

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C654DBIB64,157 is a Quad Universal Asynchronous Receiver and Transmitter (QUART) manufactured by NXP Semiconductors. It operates at supply voltages of 5 V, 3.3 V, and 2.5 V within an industrial temperature range of -40 °C to +85 °C. The device features four independent UART channels with 64-byte transmit and receive FIFOs. Data rates reach up to 5 Mbit/s at 5 V and 3.3 V, and 3 Mbit/s at 2.5 V. It supports Intel (16 mode) and Motorola (68 mode) bus interfaces, automatic hardware/software flow control, and infrared encoding/decoding. The component is housed in an LQFP64 package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Quad UART architecture with 64-byte transmit and receive FIFOs for each channel
• Supports both Intel-style 16 mode and Motorola-style 68 mode bus interfaces
• Integrated infrared encoder and decoder functionality
• Automatic hardware (RTS/CTS) and software (Xon/Xoff) flow control mechanisms

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• High-speed serial data communications systems
• Industrial equipment requiring multi-channel asynchronous connectivity
• Infrared communication interface designs
• Embedded systems utilizing shared network environments

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this variant when a quad UART configuration with 64-byte FIFOs is required alongside infrared capabilities. Ensure the design accommodates the LQFP64 package dimensions. Confirm that the target system voltage aligns with the 2.5 V, 3.3 V, or 5 V operating specifications. Verify compatibility with either Intel or Motorola bus protocols based on the 16/68 mode selection pin requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This component belongs to the SC16C654B/654DB series, which provides upward compatibility with standard 16C454/554 devices while offering enhanced performance through larger FIFO buffers. The 'DB' designation indicates specific internal bonding for continuous interrupt enable mode due to pin limitations in the 64-pin package. It serves as a high-performance replacement for legacy UARTs in applications demanding reduced CPU overhead.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Publicly confirmed substitutes include the ST16C654D and TL16C754. These components are pin-compatible and offer similar functional characteristics. Verify register-level software compatibility before implementation, as minor differences in feature sets may exist between the original and replacement parts.