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Infineon Technologies PEF 20525 F V1.3
- Part No.:
- PEF 20525 F V1.3
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 100-LQFP
- Datasheet:
-
PEF 20525 F V1.3.pdf
- Description:
- IC TELECOM INTERFACE TQFP-100
- Quantity:
- Payment:
- Shipping:
Inventory:4,558
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Product details
Overview
PEF 20525 F V1.3 from Infineon Technologies is a dual-channel serial communication controller implementing HDLC and PPP protocols with integrated baud rate generation, clock recovery (DPLL), and dual SCC cores. It supports Intel/Motorola bus interfaces, external DMA, and operates at up to 40 MHz system clock with 3.3 V supply. Used in telecom access equipment for T1/E1 line interface cards requiring deterministic frame synchronization and bit-transparent data transport.
For engineers reviewing the PEF 20525 F V1.3 datasheet, PEF 20525 F V1.3 pinout, PEF 20525 F V1.3 application, or PEF 20525 F V1.3 equivalent, key selection criteria include dual-channel HDLC/PPP protocol offload capability, support for time-slot and octet-sync clock modes, programmable FIFO depth (128-byte TX/RX per channel), and JTAG boundary-scan test compliance per IEEE 1149.1.
Technical Context
The PEF 20525 F V1.3 integrates two independent Serial Communication Controllers (SCCs), each with dedicated HDLC/PPP protocol engines, 128-byte transmit and receive FIFOs, and configurable clocking modes (0–7) including time-slot (Mode 5a) and octet-sync (Mode 5b). Each SCC supports NRZ, NRZI, FM0, FM1, and Manchester encoding with automatic CRC-16/CCITT generation and checking.
Its microprocessor interface supports both Intel-style (multiplexed address/data with ALE) and Motorola-style (non-multiplexed) timing, while the DPLL provides clock recovery from incoming serial streams with ±100 ppm tolerance. External DMA support enables zero-wait-state burst transfers via dedicated DMA request/acknowledge signals (DRQx/DACKx).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protocol Support | HDLC/SDLC, PPP (bit-sync & octet-sync), Extended Transparent Mode - enables interoperability with legacy telecom framing and modern dial-up/IP encapsulation. |
| Channels | 2 independent SCCs - allows concurrent T1 and E1 line termination or dual-point-to-point links without external multiplexing. |
| FIFO Depth | 128 bytes TX + 128 bytes RX per channel - reduces CPU interrupt load and supports bursty traffic with >10 ms jitter margin at 2.048 Mbps. |
| Max System Clock | 40 MHz - enables full-duplex operation at E1 (2.048 Mbps) with 16× oversampling and real-time register access latency ≤ 250 ns. |
| Supply Voltage | 3.3 V ± 0.3 V - compatible with standard LVCMOS I/O domains and eliminates need for level-shifting in 3.3 V systems. |
| Encoding Schemes | NRZ, NRZI, FM0, FM1, Manchester - supports legacy SS7 signaling, ISDN BRI, and synchronous modem interfaces without external encoder logic. |
| DPLL Accuracy | ±100 ppm lock range - ensures stable clock recovery from degraded or jittered E1/T1 inputs without external PLL components. |
Pinout & Package
PEF 20525 F V1.3 is available in P-TQFP-100-3 (14 mm × 14 mm, 0.5 mm pitch) and P-LFBGA-80-2 (9 mm × 9 mm, 0.8 mm pitch) packages. Pin functions are identical across variants; TQFP variant used for reference below.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLKIN | System clock input | Accepts 40 MHz CMOS-level clock; drives internal PLL and synchronizes all SCC and bus logic. |
| RESET | Asynchronous active-low reset | Clears all registers, FIFOs, and state machines; requires ≥100 ns pulse width for reliable initialization. |
| RD/WR | Read/write control (Intel mode) | Combined RD/WR signal for multiplexed bus; determines direction of data transfer on AD[15:0]. |
| ALE | Address latch enable | Strobes upper address bits during Intel bus cycles; required for proper address/data demultiplexing. |
| DRQ0/DRQ1 | DMA request outputs | Asserted when respective channel FIFO reaches programmable threshold; triggers external DMA controller for bulk data transfer. |
| DACK0/DACK1 | DMA acknowledge inputs | Sampled on rising edge of CLKIN; enables burst-mode data transfer without CPU intervention. |
| TxD0/TxD1 | Serial transmit outputs | Differential-capable CMOS outputs; support direct connection to line drivers (e.g., DS34LV87) for E1/T1 physical layer. |
| RxD0/RxD1 | Serial receive inputs | CMOS inputs with hysteresis; accept NRZ-encoded signals up to 2.048 Mbps with built-in DPLL clock recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent SCC cores | Enables simultaneous HDLC framing on two physical lines - eliminates need for two discrete controllers in multi-port access concentrators. |
| Programmable clock modes (0–7) | Supports T1 (1.544 Mbps), E1 (2.048 Mbps), and custom time-slot allocation via Mode 5a - simplifies integration into PDH and PCM infrastructure. |
| JTAG boundary-scan (IEEE 1149.1) | Enables board-level interconnect testing without physical probe access - critical for high-density telecom backplanes. |
| General-purpose port (GPP) | 8-bit bidirectional port with interrupt capability - allows direct monitoring of external line status (e.g., LOS, AIS) without GPIO expansion. |
| Automode HDLC address recognition | Hardware-accelerated address filtering with 32-entry table - reduces CPU overhead in multi-drop HDLC networks (e.g., SCADA telemetry). |
Applications
| DSLAM Line Card | E1/T1 Channel Bank |
|---|---|
|
Use Scenario: Aggregating multiple ADSL lines onto a single E1 trunk in digital subscriber line access multiplexers. IC Role / Device Role / Timing Role: Dual-channel HDLC controller handling LAPD signaling (D-channel) and user data (B-channels) with precise time-slot alignment. Use Value: Offloads framing, CRC, and bit-stuffing from host processor, enabling deterministic 2 ms frame processing latency at full E1 rate. |
Use Scenario: Converting between T1 (1.544 Mbps) and E1 (2.048 Mbps) physical layers in carrier-grade channel banks. IC Role / Device Role / Timing Role: Protocol converter with DPLL-based clock recovery and programmable clock mode selection for seamless rate adaptation. Use Value: Eliminates external clock synthesizers and reduces component count by integrating dual-rate framing logic in one IC. |
| SS7 Signaling Gateway | Industrial Remote Terminal Unit (RTU) |
|
Use Scenario: Interfacing legacy SS7 MTP Level 2 links to IP-based signaling transport in telecom gateways. IC Role / Device Role / Timing Role: HDLC controller with automode address recognition and CRC-16/CCITT compliance for MTP2 frame validation. Use Value: Ensures bit-level conformance to ITU-T Q.703 and reduces firmware complexity for SS7 stack implementation. |
Use Scenario: Connecting SCADA master stations to field RTUs over leased E1 circuits in power substations. IC Role / Device Role / Timing Role: Robust HDLC link-layer engine supporting half-duplex SDLC-NRM with automatic retransmission and error recovery. Use Value: Guarantees >99.999% link uptime under electromagnetic interference common in high-voltage environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial communication controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Infineon PEB 20525 V1.2 | Same die, minor revision - corrected OSR/CD and OST/CTS pin multiplexing; identical electrical specs and register map. | No functional change; suitable for new designs but not drop-in replacement for V1.2 boards using prior pin mapping. | Select V1.3 for new designs requiring updated timing diagrams and corrected signal routing documentation. |
| Motorola MC68360 | Integrated PowerPC core + QUICC engine - includes processor, memory controller, and dual SCCs in one package; higher power and BOM cost. | Used where embedded protocol stack execution is required on-chip; not suitable for pure offload-only roles. | Choose MC68360 only if real-time HDLC/PPP stack execution and local decision-making (e.g., dynamic link reconfiguration) are needed. |
Compared with PEB 20525 V1.2, the PEF 20525 F V1.3 offers verified pinout corrections for modem control signals and updated timing diagrams for Intel bus mode, while the MC68360 trades protocol offload simplicity for integrated processing - making it over-engineered for fixed-function line card applications.
Availability
PEF 20525 F V1.3 is available at Aetrix Electronics and suitable for DSLAM line cards, E1/T1 channel banks, and SS7 signaling gateways requiring stable component supply, long-term obsolescence management, and traceable sourcing for telecom infrastructure deployments.
Supply support for PEF 20525 F V1.3 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and communications solutions, with headquarters in Munich and global R&D centers.
The SEROCCO-H product line - including PEF 20525 - was designed specifically for carrier-class datacom applications requiring deterministic HDLC/PPP offload, low-latency interrupt response, and robust clock recovery in E1/T1 physical layer interfaces.
FAQ
What bus interface standards does PEF 20525 F V1.3 support?
The PEF 20525 F V1.3 supports both Intel-style (multiplexed AD[15:0] with ALE strobe) and Motorola-style (separate address/data buses) microprocessor interfaces. Timing diagrams for both are fully specified in the datasheet, including setup/hold requirements for 40 MHz operation and compatibility with 80C186, 68000, and ARM7-based hosts.
Does PEF 20525 F V1.3 support JTAG boundary-scan testing?
Yes, the device implements IEEE 1149.1-compliant JTAG boundary-scan functionality with dedicated TCK, TMS, TDI, TDO, and TRST pins. The scan chain covers all I/O pins and internal register paths, enabling automated PCB interconnect testing and in-system programming verification per section 8.1 of the datasheet.
Can PEF 20525 F V1.3 operate in half-duplex SDLC-NRM mode?
Yes, the SCC cores support half-duplex SDLC-NRM (Normal Response Mode) as defined in ISO/IEC 3309 and ANSI T1.403. Configuration is done via register writes to the Mode Register (MR) and Command Register (CR), with hardware-assisted polling, response timing, and frame retransmission handling per section 4.4.2 of the datasheet.
What is the maximum supported data rate per channel?
The PEF 20525 F V1.3 supports serial data rates up to 2.048 Mbps per channel (E1 standard) with full HDLC/PPP protocol processing, including CRC generation/checking, bit-stuffing, and address recognition. At this rate, the DPLL maintains lock with ±100 ppm input jitter, and FIFO buffering prevents overrun under worst-case interrupt latency conditions.
PEF 20525 F V1.3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 100-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Serial Optimized Communications Controller
- Interface:
- ASYNC, BISYNC, HDLC, PPP
- Number of Circuits:
- 2
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- 50mA
- Power (Watts):
- 150 mW
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TQFP-100-3
PEF 20525 F V1.3 FAQ
1.How can I place an order for PEF 20525 F V1.3 through Aetrix?
Please submit a Request for Quotation (RFQ) for PEF 20525 F V1.3 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 PEF 20525 F V1.3 reliable?
The price and inventory of PEF 20525 F V1.3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PEF 20525 F V1.3 is usually 5 days.
3.What payment methods are accepted for PEF 20525 F V1.3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PEF 20525 F V1.3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PEF 20525 F V1.3?
PEF 20525 F V1.3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PEF 20525 F V1.3 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 PEF 20525 F V1.3?
For technical support, including PEF 20525 F V1.3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PEF 20525 F V1.3 requirements.
6.How does Aetrix verify that PEF 20525 F V1.3 is sourced from the original manufacturer or authorized distributors?
All PEF 20525 F V1.3 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 PEF 20525 F V1.3 meets industry standards.
7.What is the process for return or replacement of PEF 20525 F V1.3?
All PEF 20525 F V1.3 units undergo pre-shipment inspection (PSI). If there is an issue with PEF 20525 F V1.3, 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 PEF 20525 F V1.3 part is unused and in its original packaging.
Return procedure for PEF 20525 F V1.3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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