SAB82526N-V21

Specialized Overview

The SAB82526N-V21 is a High-Level Serial Communication Controller Extended (HSCX) fabricated using advanced CMOS technology. It features one independent full-duplex HDLC channel, supporting data rates up to 4 Mbit/s. The device includes on-chip clock generation, baudrate generators, and Digital Phase Locked Loops (DPLL) for clock recovery. It provides 64-byte FIFOs per channel and direction, an 8-bit demultiplexed bus interface compatible with Intel or Motorola microcontrollers, and supports protocols such as LAPB, LAPD, and SDLC.

Specialized Feature Summary

• Supports full-duplex HDLC protocol handling including flag insertion, bit stuffing, and CRC generation
• Integrates internal oscillator, baudrate generators, and DPLL circuits for flexible clock management
• Features 64-byte transmit and receive FIFOs to decouple serial interfaces from the system bus
• Provides DMA capability via a dedicated interface for efficient block data transfers

Specialized Applications

• ISDN applications utilizing time-division multiplex methods
• Packet switching systems requiring high-speed synchronous communication
• Time-slot oriented PCM systems
• Industrial automation control components

Specialized Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm package integrity and pin alignment against P-LCC-44 specifications. Review datasheet electrical characteristics for operating range compliance. Ensure proper ESD handling during storage and installation. Validate revision markings match the V21 designation.

Specialized Selection Notes

Select this model when a single full-duplex HDLC channel is sufficient for the application. Compare with the SAB82525 if two independent channels are required. Ensure the host system supports the 8-bit demultiplexed bus interface or configure for Intel/Motorola compatibility. Verify power supply requirements align with the +5V specification.

Specialized Part Context

The SAB82526 is part of the HSCX family, which includes the SAB82525. While the SAB82525 offers two independent channels, the SAB82526 provides one channel (Channel B), maintaining pin and software compatibility with the dual-channel variant. Both devices share identical functional descriptions and register sets for their respective active channels.

Specialized Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.