SC26C92A1A,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC26C92A1A is a dual universal asynchronous receiver/transmitter (DUART) manufactured by NXP USA Inc. It provides two independent full-duplex channels within a single package, featuring 8-character FIFOs for both receive and transmit operations to minimize overrun and underrun risks. The device supports programmable data formats including 5 to 8 data bits, parity options, and 1, 1.5, or 2 stop bits. It operates on a single +5V supply and includes an on-chip crystal oscillator. Key electrical parameters include a maximum clock frequency of 8 MHz, a maximum data transfer rate of 1 Mb/sec at 16X clocking, and an operating temperature range of -40°C to +85°C for the industrial variant.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent asynchronous receiver/transmitter channels with 8-byte FIFOs
• Programmable baud rates selectable from fixed rates or external clocks
• Integrated multipurpose I/O ports and versatile interrupt system
• Supports modem interface, DMA interface, and power-down mode

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel operation
• Microprocessor-based polled or interrupt-driven communication systems
• Industrial equipment utilizing RS-232 or similar serial interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the SC26C92 series is available in DIP, PLCC, and PQFP configurations. Confirm the temperature grade corresponds to commercial or industrial specifications before finalizing procurement. Ensure compatibility with existing microprocessor bus timing requirements regarding setup and hold times.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when pin and function compatibility with the SCC2692 or SCN2681 is required alongside enhanced FIFO depth. Consider the SC26C92A1A specifically for applications needing the 44-pin PLCC package and industrial temperature rating. Evaluate the need for independent baud rate generation per channel and the availability of internal pull-up resistors on input pins.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC26C92A1A belongs to the Philips/NXP SC26C92 family of DUARTs. It serves as a direct replacement for legacy devices like the SCC2692 while offering improved performance through deeper buffers and additional control registers. The 'A' suffix typically denotes the industrial temperature range, distinguishing it from commercial variants.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Public confirmed substitutes include the SCC2692 and SCN2681, which share pin and function compatibility. The D2692 is also noted as software compatible but offers different bus interfaces.