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Infineon Technologies SAF 82526 N V2.2
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- Part No.:
- SAF 82526 N V2.2
- Manufacturer:
- Infineon Technologies
- Category:
- Specialized
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
SAF 82526 N V2.2.pdf
- Description:
- IC INTERFACE SPECIALIZED 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,906
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Product details
Overview
SAF 82526 N V2.2 from Siemens AG is a single-channel High-Level Serial Communication Controller Extended (HSCX) IC implementing HDLC/LAPB/LAPD/SDLC Layer-2 protocol handling with integrated DPLL clock recovery, 64-byte TX/RX FIFOs, and DMA/interrupt data transfer. It operates at up to 4 Mbit/s, consumes 25 mW active power at 4 MHz, and targets ISDN terminal adapters and X.25 packet-switching equipment.
For engineers reviewing the SAF 82526 N V2.2 datasheet, SAF 82526 N V2.2 pinout, SAF 82526 N V2.2 application, or SAF 82526 N V2.2 equivalent, key selection criteria include its single-HDLC-channel architecture, P-LCC-44 package compatibility with SAB 82525/SAF 82525, 8-bit demultiplexed bus interface, and support for auto/non-auto/transparent operating modes in telecom infrastructure designs.
Technical Context
The SAF 82526 implements one full-duplex HDLC channel with independent command/status registers and dedicated 64-byte transmit/receive FIFOs. Its DPLL enables robust clock recovery from serial data streams, and dual baudrate generators (one per channel in dual variants; one in SAF 82526) support programmable time-slot assignment (1–256 bits) for TDM systems.
It supports three primary operating modes: Auto-mode for LAPB/LAPD/SDLC frame handling (I/S/U frames, modulo-8/128), Non-Auto mode for manual control of HDLC functions, and Transparent modes for raw byte transmission without flag insertion, bit stuffing, or CRC. The 8-bit demultiplexed adaptive bus interface ensures direct compatibility with Intel/Motorola 8/16-bit microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Single-channel HDLC data link controller supporting LAPB, LAPD, SDLC-NRM protocols |
| Max Data Rate | 4 Mbit/s - enables ISDN B-channel and high-speed packet links |
| FIFO Depth | 64 bytes per direction - decouples serial I/O from CPU, reducing interrupt load |
| Power Consumption | 25 mW active / 4 mW standby at 4 MHz - suitable for low-power telecom line cards |
| Bus Interface | 8-bit demultiplexed - directly interfaces 80C86, 68000, and compatible microprocessors |
| Operating Modes | Auto, Non-Auto, Transparent Mode 0/1, Extended Transparent - configurable for protocol stack offload or raw transport |
| DPLL Support | On-chip digital phase-locked loop per channel - recovers clock from NRZ data without external components |
Pinout & Package
SAF 82526 N V2.2 is housed in a P-LCC-44 (plastic leaded chip carrier, 44-pin, surface-mount) package with 1.27 mm pitch and JEDEC MO-052 compliance. Pin assignments are validated per Siemens document ITP00945 (SAB/SAF 82526 P-LCC-44 top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RES | Reset Input | Active-low asynchronous reset; initializes all registers and FIFOs |
| CS | Chip Select | Enables register access when low; supports multi-device bus decoding |
| WR/IC0, RD/IC1 | Write/Read Control | Demultiplexed bus control lines for register read/write cycles |
| D0–D7 | Data Bus | 8-bit bidirectional data path for register and FIFO access |
| INT | Interrupt Output | Open-drain interrupt request signaling DMA completion, error, or frame ready |
| DRQTB, DRQRB | DMA Request | Transmit/receive DMA request lines for burst transfers to/from system memory |
| RxDB, TxDB | Serial Data I/O | Channel B receive/transmit data pins - primary HDLC interface for SAF 82526 |
| RxCLKB, TxCLKB | Serial Clock I/O | Receive/transmit clock inputs for synchronous HDLC operation |
| RTSB, CTSB/CxDB | Modem Control | Request-to-send and clear-to-send/carrier-detect for flow control and line status |
| AxCLKB | External Clock Input | Provides reference clock for DPLL or direct baudrate generation |
Key Features
| Feature | Design Value |
|---|---|
| Single HDLC Channel (B) | Optimized silicon area and power vs. dual-channel SAB 82525; reduces BOM cost in single-link applications |
| 64-Byte Dual FIFO | Enables 32-byte DMA bursts without CPU intervention; eliminates per-byte overhead in packet processing |
| DPLL Clock Recovery | Eliminates need for external clock recovery ICs in ISDN or leased-line modems |
| Transparent Mode Support | Allows raw byte streaming without HDLC framing-essential for proprietary or non-standard protocols |
| Programmable Time-Slot Length | Configurable 1–256 bit slots enable precise alignment with PCM/TDM frame structures (e.g., E1/T1) |
Applications
| ISDN Terminal Adapter | X.25 Packet Switch Node |
|---|---|
Use Scenario: Connecting analog PBX or fax machines to ISDN basic rate interface (BRI) via S/T reference point. IC Role / Device Role / Timing Role: HDLC controller implementing LAPD protocol stack for D-channel signaling and B-channel data framing. Use Value: Offloads LAPD frame assembly/disassembly, CRC checking, and bit stuffing from host MCU-reducing firmware complexity and latency. | Use Scenario: Edge node in public data network aggregating asynchronous terminals onto X.25 virtual circuits. IC Role / Device Role / Timing Role: LAPB-compliant data link layer engine managing link establishment, error recovery, and frame sequencing. Use Value: Enables deterministic 128-byte frame handling with modulo-128 windowing-meeting ITU-T X.25 Annex D timing requirements. |
| Leased-Line Modem Controller | TDM Multiplexer Interface |
Use Scenario: Embedded controller in point-to-point 64 kbps leased-line modem for SCADA telemetry. IC Role / Device Role / Timing Role: HDLC link controller with DPLL recovering clock from NRZ-encoded data stream. Use Value: Achieves bit-synchronous operation without external clock source-simplifying hardware design and improving jitter tolerance. | Use Scenario: Interfacing microcontroller to 2.048 Mbps E1 line with 32 time-slots using G.704 framing. IC Role / Device Role / Timing Role: Time-slot oriented serial controller assigning fixed-length slots (e.g., 8 bits) to individual channels. Use Value: Supports programmable slot length (1–256 bits) and independent slot assignment-enabling custom TDM mapping without FPGA logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar HDLC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAB 82525 N | Dual-channel HDLC controller; identical pinout and software interface; higher power (active ~35 mW) | Supports two independent HDLC links (A+B); required where dual-BRI or redundant link needed | Select when dual-channel capability justifies added cost and power |
| SAF 82525 N | Pin/software compatible dual-channel variant in same P-LCC-44 package; identical electrical specs | Same dual-link functionality as SAB 82525 but with SAF-series qualification (e.g., extended temp range) | Choose for industrial environments requiring wider operating temperature or enhanced reliability screening |
Compared with SAB 82525 N and SAF 82525 N, SAF 82526 N V2.2 provides identical feature depth and timing performance in a lower-cost, lower-power single-channel configuration-making it optimal for cost-sensitive, single-link telecom endpoints where dual-channel redundancy is unnecessary.
Availability
SAF 82526 N V2.2 is available at Aetrix Electronics and suitable for ISDN terminal adapters, X.25 packet switch nodes, and leased-line modem controllers requiring stable component supply across long-lifecycle telecom deployments.
Supply support for SAF 82526 N V2.2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Siemens AG Semiconductor Group (now Infineon Technologies) was a leading European semiconductor manufacturer, specializing in industrial, automotive, and telecommunications ICs using advanced CMOS processes.
SAF 82526 belongs to the HSCX (High-Level Serial Communication Controller Extended) product line, designed specifically to offload HDLC/LAPB/LAPD protocol processing from host processors in ISDN, X.25, and TDM-based communication equipment.
FAQ
Is SAF 82526 N V2.2 pin-compatible with SAB 82525?
Yes, SAF 82526 N V2.2 is pin-compatible with SAB 82525 N in the P-LCC-44 package. However, pins 30 (DACKA), 36 (TxCLKA), and 39 (DRQRA) are No Connect on SAF 82526, reflecting its single-channel (B-only) implementation versus the dual-channel SAB 82525.
What clock sources does the SAF 82526 support for HDLC operation?
The SAF 82526 supports both external clock input (via AxCLKB) and on-chip DPLL-based clock recovery from the RxDB data stream. The DPLL locks to NRZ-encoded signals within ±100 ppm frequency deviation, enabling reliable operation without a separate clock line in many ISDN and leased-line applications.
Does SAF 82526 support both LAPB and LAPD protocols simultaneously?
No. The SAF 82526 supports LAPB (X.25) and LAPD (ISDN D-channel) in Auto-mode, but only one protocol instance per channel. Since it implements only Channel B, it handles either LAPB or LAPD-not both concurrently. Protocol selection is configured via mode register bits during initialization.
Can SAF 82526 operate in transparent mode without HDLC framing?
Yes. In Transparent Mode 0 or 1 (selected by MDS1/MDS0/ADM pins), the SAF 82526 bypasses flag detection, bit stuffing, and CRC generation-transferring raw bytes between RxDB/TxDB and FIFOs. This mode is used for proprietary protocols or when framing is handled externally by FPGA or DSP.
SAF 82526 N V2.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- Serial
- Voltage - Supply:
- 4.75V ~ 5.25V
- Supplier Device Package:
- P-LCC-44-1
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
SAF 82526 N V2.2 FAQ
1.How can I place an order for SAF 82526 N V2.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SAF 82526 N V2.2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SAF 82526 N V2.2 reliable?
The price and inventory of SAF 82526 N V2.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SAF 82526 N V2.2 is usually 5 days.
3.What payment methods are accepted for SAF 82526 N V2.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SAF 82526 N V2.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SAF 82526 N V2.2?
SAF 82526 N V2.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SAF 82526 N V2.2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SAF 82526 N V2.2?
For technical support, including SAF 82526 N V2.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SAF 82526 N V2.2 requirements.
6.How does Aetrix verify that SAF 82526 N V2.2 is sourced from the original manufacturer or authorized distributors?
All SAF 82526 N V2.2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SAF 82526 N V2.2 meets industry standards.
7.What is the process for return or replacement of SAF 82526 N V2.2?
All SAF 82526 N V2.2 units undergo pre-shipment inspection (PSI). If there is an issue with SAF 82526 N V2.2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SAF 82526 N V2.2 part is unused and in its original packaging.
Return procedure for SAF 82526 N V2.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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