SC26C92C1B,551

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC26C92C1B,551 is a Dual Universal Asynchronous Receiver/Transmitter (DUART) manufactured by NXP Semiconductors. It provides two independent full-duplex asynchronous channels within a single package. The device features an 8-byte FIFO for both the receiver and transmitter to minimize overrun and underrun errors. It supports programmable data formats including 5 to 8 data bits, parity options, and 1, 1.5, or 2 stop bits. Baud rates are selectable from 27 fixed rates up to 230.4k baud, or via a programmable counter/timer. The component operates on a single +5V power supply and is housed in a 44-pin Plastic Quad Flat Pack (PQFP).

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent full-duplex asynchronous receiver/transmitter channels.
• Integrated 8-character FIFOs for both receive and transmit operations.
• Programmable baud rate generation using internal counters or external clocks.
• Versatile interrupt system with maskable conditions and watchdog timers.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications.
• Programmable Logic Controllers (PLCs) and remote I/O modules.
• Industrial control systems utilizing polled or interrupt-driven architectures.

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Confirm availability status as commercial variants may have different lifecycle stages than industrial versions. Ensure the PQFP-44 package matches the target PCB footprint requirements before finalizing procurement orders.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual independent UART channels are required in a single footprint. Compare the 8-byte FIFO depth against application buffer requirements to determine if interrupt overhead is manageable. Verify that the +5V operating voltage aligns with the system power rails. Consider the PQFP-44 package constraints regarding thermal dissipation and board space compared to DIP or PLCC alternatives.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC26C92 serves as a pin and function replacement for legacy devices like the SCC2692 and SCN2681 while offering enhanced performance through deeper FIFOs and extended baud rate capabilities. The 'C' designation indicates the commercial temperature grade variant, specifically rated for operation between 0°C and +70°C. This model belongs to the broader SC26C92 family which includes industrial and DIP package variations.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC26C92C1B is functionally compatible with the SCC2692 and SCN2681. For direct pin-for-pin replacement in existing designs, verify that the system can accommodate the slightly different power-up configuration of the SC26C92 compared to its predecessors.