SC26C92A1N,112

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC26C92A1N is a dual universal asynchronous receiver/transmitter (DUART) manufactured by NXP Semiconductors. It provides two independent full-duplex asynchronous channels within a single package, designed as a pin-compatible replacement for the SCC2692 and SCN2681 with enhanced features. The device operates on a single +5V power supply and supports data transfer rates up to 1 Mb/sec at both 1X and 16X clock speeds. Each channel includes an 8-character receive FIFO and an 8-character transmit FIFO to minimize overrun and underrun errors. The component is available in a 44-pin Plastic Leaded Chip Carrier (PLCC) package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent asynchronous receiver/transmitter channels with 8-byte FIFOs
• Programmable baud rate generation using internal crystal oscillator or external clocks
• Versatile interrupt system with maskable conditions and programmable output port interrupts
• Multi-function I/O ports with change-of-state detection and general-purpose control

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel operation
• Microprocessor-based serial communication interfaces
• Systems utilizing polled or interrupt-driven data exchange protocols

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product specification to confirm package type and temperature range. Ensure that the commercial grade variant meets the required ambient operating temperature specifications for the intended application environment before finalizing procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a direct hardware replacement for legacy SCC2692 or SCN2681 designs is required but deeper FIFO buffers are needed. Consider the PLCC package availability if surface-mount assembly is preferred over DIP configurations. Verify that the system architecture can support the 4-bit address bus and 8-bit data bus interface requirements defined in the datasheet.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC26C92 series represents a CMOS-LSI evolution of earlier UART designs, specifically enhancing buffer depth and interrupt flexibility. The A1N suffix denotes the commercial temperature range variant housed in a 44-pin PLCC package. This part belongs to a family of DUARTs widely used in industrial and embedded computing environments where reliable serial data transmission is critical.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC26C92A1N serves as a pin and function replacement for the SCC2692 and SCN2681. Designers should verify software compatibility regarding the added Mode Register 0 and extended baud rate capabilities which may require firmware updates compared to legacy implementations.