SC16C654BIB64,128

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC16C654BIB64,128 is a quad universal asynchronous receiver and transmitter (QUART) manufactured by NXP Semiconductors. It operates within a voltage range of 2.25 V to 5.5 V, supporting 2.5 V, 3.3 V, and 5 V logic levels. The device provides four independent UART channels with data rates up to 5 Mbit/s at 5 V and 3.3 V, and up to 3 Mbit/s at 2.5 V. Each channel includes 64-byte transmit and receive FIFOs. It features automatic hardware or software flow control, infrared encoder/decoder capabilities, and an internal loop-back mode for diagnostics. The component is housed in a 64-lead LQFP package and supports both Intel and Motorola bus interfaces.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Quad UART architecture with 64-byte transmit and receive FIFOs per channel
• Supports Intel (16 mode) and Motorola (68 mode) bus interface compatibility
• Integrated infrared (IrDA) encoder/decoder and standard modem interface controls
• Automatic hardware (RTS/CTS) and software (Xon/Xoff) flow control mechanisms

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Telecommunication network routers
• Portable appliances requiring serial communication
• Cellular data devices
• Factory automation and process controls

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix ',128' against official NXP documentation to confirm tape and reel packaging specifications. Ensure the component meets required RoHS compliance standards for the target application environment. Confirm availability status as distribution listings may indicate discontinued or limited stock conditions.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a design requires four independent serial ports with high-capacity buffering to reduce CPU interrupt load. It is suitable for systems needing compatibility with legacy 16C454/554 software while utilizing enhanced FIFO features. Verify that the LQFP64 package dimensions fit the PCB layout constraints and that the operating temperature range meets environmental requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC16C654B/654DB family of QUARTs. It is pin-compatible with ST16C654 and TL16C754 devices. The 'B' variant typically denotes specific interface configurations compared to the 'DB' variant, particularly regarding interrupt output modes on the 64-pin package. It serves as an upgrade path from 16-byte FIFO devices like the 16C554.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Publicly confirmed substitutes include SC16C654DIB64,128 and SC16C654IBM. Verify functional equivalence regarding interrupt polarity and FIFO trigger levels before replacement.