LD8251A

$61.45

Description：LD8251A - SERIAL I/O CONTROLLER,
Series：*

SKU:258902452525 Category: UARTs (Universal Asynchronous Receiver Transmitter) Brand: Rochester Electronics, LLC

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Product introduction

Product Detailed Parameters

Description：LD8251A - SERIAL I/O CONTROLLER,
Series：*
Mfr：Rochester Electronics, LLC
Package：Bulk
Features：-
Number of Channels：-
FIFO's：-
Protocol：-
Data Rate (Max)：-
Voltage - Supply：-
With Auto Flow Control：-
With IrDA Encoder/Decoder：-
With False Start Bit Detection：-
With Modem Control：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Grade：-
Qualification：-

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LD8251A

Overview

The LD8251A is a Universal Synchronous/Asynchronous Receiver/Transmitter (USART) manufactured by Rochester Electronics, LLC. It serves as an industry-standard programmable communication interface designed for data communications with microprocessor families such as MCS-48, 80, 85, and iAPX 86, 88. The device accepts parallel data characters from the CPU and converts them into a continuous serial data stream for transmission. Simultaneously, it receives serial data streams and converts them into parallel data characters for the CPU. The USART signals the CPU upon character availability or error conditions.

Feature Summary

Provides programmable serial-to-parallel and parallel-to-serial data conversion capabilities
Supports virtually any serial data transmission technique including IBM bi-sync protocols
Offers real-time status reporting to the CPU regarding data transmission errors and control signals

Applications

Data communications interfaces for MCS-48 microprocessor families
Peripheral connectivity for Intel 80 and 85 series processors
Communication links within iAPX 86 and 88 system architectures

Procurement Notes

Verify component authenticity through authorized distributor channels or direct manufacturer certification. Confirm package type and date code alignment with specific project requirements. Review datasheet specifications for electrical characteristics and operating temperature ranges prior to integration. Ensure supply chain documentation supports traceability needs for critical applications.

Selection Notes

Select this component when interfacing legacy microprocessor systems requiring standard USART functionality. Consider compatibility with target CPU families such as MCS-48 or iAPX series. Evaluate pinout and package constraints against existing board layouts. Verify that synchronous and asynchronous mode support meets the specific protocol requirements of the application design.

Part Context

Rochester Electronics, LLC specializes in providing lifecycle solutions for semiconductors, acting as an authorized source for components from over 70 leading manufacturers. The LD8251A represents a continuation of the classic Intel 8251A architecture, ensuring availability for systems requiring long-term component support beyond original production cycles.