SAB82526NV2.2

Specialized Overview

The SAB82526NV2.2 is a High-Level Serial Communication Controller Extended (HSCX) manufactured by Infineon Technologies, originally developed by Siemens. It operates within a supply voltage range of 4.75V to 5.25V and utilizes a 44-LCC (J-lead) surface-mount package. The device implements one full-duplex HDLC channel (Channel B), distinguishing it from the dual-channel SAB 82525 variant. It supports data rates up to 4 Mbit/s and features an 8-bit demultiplexed adaptive bus interface compatible with Intel or Motorola microcontroller systems. Key internal components include on-chip FIFOs with a storage capacity of up to 64 bytes per channel and direction, a Digital Phase Locked Loop (DPLL) for clock recovery, and independent baudrate generators.

Specialized Feature Summary

• Supports Layer-2 protocol functions including LAPB, LAPD, and SDLC handling independently of the host processor.
• Integrates a 4-channel DMA interface to optimize data throughput between system memory and serial interfaces.
• Provides programmable time-slot assignment and collision resolution capabilities for bus configurations.
• Includes on-chip clock generation via internal oscillator or external sources with DPLL-based clock recovery.

Specialized Applications

• ISDN applications requiring high-level serial communication control.
• Time-division multiplex methods such as time-slot oriented PCM systems.
• Packet switching systems utilizing HDLC protocols.
• Integration with 8-bit or 16-bit microcontroller systems like the SAB 8051 or SAB 80188.

Specialized Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific revision level matches project requirements. Check for end-of-life status implications regarding long-term availability. Ensure compatibility with existing PCB footprints for the P-LCC-44 package. Review datasheet electrical characteristics against system power constraints.

Specialized Selection Notes

Select this model when only a single HDLC channel is required, offering cost efficiency over the dual-channel SAB 82525. Ensure the host system supports the necessary 8-bit bus interface modes. Verify that the application does not require two independent serial channels. Consider the pinout differences compared to the SAF variants if radiation hardening is needed. Confirm software compatibility with the HSCX register set.

Specialized Part Context

This component belongs to the HSCX family designed for high-speed synchronous communications. It serves as an evolution of the SAB 82520 HSCC with extended functionality. The SAB 82526 variant specifically provides one channel, whereas the SAB 82525 provides two. Both are fabricated using advanced ACMOS technology. The device decouples serial interfaces from the system bus to reduce CPU load.

Specialized Replacement Considerations

The SAB 82525 N is a functional substitute if two channels are acceptable. The SAF 82526 N offers identical functionality in the same package but may differ in environmental qualification. Verify pin compatibility and software register mapping before substitution.