SAB 82525 N V2.2

Specialized Overview

The SAB 82525 N V2.2 is a High-Level Serial Communication Controller Extended (HSCX) manufactured by Infineon Technologies, housed in a 44-pin P-LCC surface-mount package. It operates on a single 5V supply within the 4.75V to 5.25V range and features an advanced ACMOS technology for low power consumption. The device integrates two independent full-duplex HDLC channels, each equipped with 64-byte transmit and receive FIFOs. It supports data rates up to 4 Mbit/s and includes built-in clock recovery via Digital Phase Locked Loops (DPLL). The controller provides an 8-bit demultiplexed bus interface compatible with Intel or Motorola microprocessors, facilitating efficient data transfer through DMA or interrupt requests.

Specialized Feature Summary

• Supports Layer-2 protocol functions including LAPB, LAPD, and SDLC independently of the host processor
• Integrates two independent full-duplex serial channels with dedicated baudrate generators and DPLL circuits
• Features an 8-bit demultiplexed adaptive bus interface optimized for DMA and interrupt-driven block transfers
• Includes programmable time-slot assignment and collision resolution capabilities for bus configurations

Specialized Applications

• ISDN terminal equipment and network interfaces
• High-speed synchronous serial communication links using HDLC protocols
• Time division multiplex systems and packet switching networks
• X.25 LAPB data link implementations

Specialized Procurement Notes

Verify component authenticity against official Infineon documentation due to discontinued status. Confirm package integrity and pin alignment for the 44-P-LCC form factor. Review revision history for any functional variations between manufacturing batches. Ensure compatibility with existing system bus architectures before integration into new designs.

Specialized Selection Notes

Select this component for applications requiring dual-channel HDLC processing with minimal CPU overhead. Compare against the SAB 82526 if only a single channel is necessary. Evaluate system memory constraints as the device relies on external buffers for large frame handling. Consider the availability of replacement sources given the end-of-life designation.

Specialized Part Context

This part belongs to the HSCX family, extending the functionality of the earlier SAB 82520. It was originally developed by Siemens Semiconductor Group and later transitioned to Infineon Technologies. The device serves as a bridge between high-level microprocessor buses and serial physical layers, reducing software complexity in telecommunications applications.

Specialized Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status, alternative solutions require architectural redesign or verification of cross-compatible legacy stock.