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Infineon Technologies PEF 4268 F V1.2
- Part No.:
- PEF 4268 F V1.2
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 48-LQFP
- Datasheet:
-
PEF 4268 F V1.2.pdf
- Description:
- IC TELECOM INTERFACE 48-TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,278
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Product details
Overview
PEF 4268 F V1.2 from Infineon Technologies is a ringing Subscriber Line Interface Circuit (SLIC-DC) with integrated DC/DC converter for POTS line interface in VoIP gateways and CPE. It generates up to −150 V DC feed, delivers 85 Vrms sinusoidal ringing, operates from a single 9–40 V unregulated supply, supports synchronized multi-SLIC operation (up to 8 units), and interfaces directly with VINETIC-2CPE and legacy Infineon codecs.
For engineers reviewing the PEF 4268 F V1.2 datasheet, PEF 4268 F V1.2 pinout, PEF 4268 F V1.2 application, or PEF 4268 F V1.2 equivalent, key selection criteria include programmable DC feed, transversal current sensing, GR-909-compliant ITDF support, and compatibility with ADM5120SP-based ATA designs requiring low-BOM analog voice front-ends.
Technical Context
The PEF 4268 F V1.2 implements a balanced SLIC architecture with on-chip flyback DC/DC conversion enabling full POTS line powering from one input rail. Its patented ring mode dynamically reduces quiescent current during ringing, lowering thermal load without compromising peak output capability.
It features a standardized SLIC-Codec interface compatible with SLIC-S/E/P families and extended support for VINETIC-2CPE, including SYNC pin for deterministic multi-channel timing alignment and SENSE terminal for real-time transversal line current monitoring used in loop diagnostics and fault detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Ringing Voltage | Up to 85 Vrms sinusoidal - enables compliant POTS ringing across global telephony standards (e.g., FCC Part 68, ETSI EN 300 386) |
| DC Feed Voltage | Programmable up to −150 V - supports long-loop (>5 km) analog line driving with adjustable current limit and impedance matching |
| Supply Input Range | 9 V to 40 V unregulated - eliminates need for external pre-regulation; compatible with wall adapters and PoE-derived supplies |
| Multi-SLIC Sync | Supports synchronization of up to 8 devices - ensures phase-aligned ringing and coordinated diagnostic execution in multi-line systems |
| ITDF Support | Integrated Test & Diagnostic Function per GR-909 - enables automated line testing (open/short, capacitance, resistance) without external instrumentation |
| Interface Compatibility | Backward-compatible with SLIC-S/E/P; native VINETIC-2CPE mode - simplifies migration from prior Infineon voice platforms |
Pinout & Package
P-TQFP-48-1 package: 48-pin thermally enhanced thin quad flat pack with exposed thermal pad, 0.5 mm pitch, body size 7 mm × 7 mm. Designed for high-density VoIP gateway PCB layouts with mandatory GND plane under thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TIP / RING | Line interface differential pair | Direct connection to telephone line; supports ±150 V common-mode tolerance and transient protection via external components |
| ACP / ACN | AC coupling inputs | Accept codec-side AC-coupled audio signals; biasing set internally for 0 V DC offset at line interface |
| DCP / DCN | DC feed outputs | Deliver programmable −150 V DC feed; require external RC snubbers for EMI suppression and stability |
| SYNC | Multi-device synchronization input | Accepts 0–3.3 V clock signal to align ringing phase and diagnostic timing across up to 8 SLIC-DCs |
| SENSE | Transversal current sense node | Provides analog voltage proportional to line current for real-time monitoring and GR-909 loop diagnostics |
Key Features
| Feature | Design Value |
|---|---|
| Patented ring mode | Reduces average power consumption by >40% during ringing vs. conventional SLICs - lowers thermal design requirements and enables fanless enclosures |
| Integrated DC/DC converter | Eliminates need for external isolated DC/DC modules - reduces BOM count by ≥7 components and saves ≥120 mm² PCB area |
| VINETIC-2CPE interface | Native support for advanced voice processor features including echo cancellation coordination and dynamic gain control handshaking |
| GR-909 ITDF compliance | On-chip test logic enables automated line qualification per Telcordia GR-909 - removes requirement for external test microcontroller or FPGA |
| Single-supply operation | Operates from 9–40 V unregulated input - compatible with 12 V/24 V industrial rails and wide-range AC/DC adapters without LDO pre-regulation |
Applications
| Analog Telephone Adapter (ATA) | Voice over IP Gateway |
|---|---|
Use Scenario: Residential or SOHO device converting PSTN analog lines to SIP/RTP packets over Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Primary SLIC providing line battery feed, ringing generation, and hybrid interface for two-way voice path. Use Value: Integrated −150 V DC/DC and 85 Vrms ringing meet global POTS interface specs while reducing external component count by 30% vs. discrete SLIC + controller solutions. | Use Scenario: Carrier-class multi-line VoIP gateway supporting up to 4 POTS lines with simultaneous call handling and diagnostics. IC Role / Device Role / Timing Role: One of four synchronized PEF 4268 F V1.2 units delivering coordinated ringing and shared GR-909 diagnostics across all lines. Use Value: SYNC pin enables deterministic phase alignment of ringing signals, eliminating audible beat frequencies and ensuring consistent line seizure behavior. |
| xDSL Customer Premises Equipment | Small Business PABX |
Use Scenario: Integrated xDSL modem/router with embedded voice port for fax/voice backup over copper line. IC Role / Device Role / Timing Role: SLIC-DC interfacing with DuSLIC codec to provide analog line interface alongside ADSL2+ data path. Use Value: Backward-compatible SLIC-S/E interface allows reuse of existing firmware drivers and layout footprints from prior Infineon-based designs. | Use Scenario: Compact 4-line business phone system with centralized ringing control and remote management. IC Role / Device Role / Timing Role: Centralized SLIC managing battery feed and ringing for all extensions; SENSE pin feeds line status to host MCU for fault reporting. Use Value: Transversal current sensing enables real-time detection of off-hook, short-circuit, and open-loop conditions - critical for automated maintenance alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC-DC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PEF 4268 T | Different package: P-DSO-24-8 (24-pin SOIC); lacks SYNC and SENSE pins; lower max ringing voltage (75 Vrms) | Suitable only for single-line, non-synchronized CPE; no GR-909 diagnostics support | Select when board space permits larger SOIC footprint and multi-line sync or advanced diagnostics are unnecessary |
| Si3226x (Skyworks) | Higher integration: includes integrated codec and DSP; requires separate 3.3 V digital supply; different register map and interface protocol | Targeted at fully integrated single-chip VoIP SoCs; not drop-in compatible with Infineon VINETIC-based platforms | Select when migrating to new platform with unified voice processing and reduced external memory requirements |
Compared with PEF 4268 T and Si3226x, the PEF 4268 F V1.2 uniquely balances high-voltage line driving, multi-unit synchronization, and legacy codec compatibility - making it optimal for incremental upgrades of Infineon-based multi-line VoIP gateways requiring field-proven reliability and minimal firmware changes.
Availability
PEF 4268 F V1.2 is available at Aetrix Electronics and suitable for Analog Telephone Adapters, VoIP Gateways, and xDSL CPE requiring stable component supply, long-lifecycle support, and qualified sourcing for production volumes.
Supply support for PEF 4268 F V1.2 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
Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and communications ICs, with core expertise in high-voltage analog and mixed-signal design.
The SLIC-DC product line targets cost-optimized, high-reliability voice interface solutions for carrier-grade and enterprise VoIP infrastructure, emphasizing low thermal footprint, regulatory compliance, and seamless integration with Infineon's voice processor ecosystem.
FAQ
What is the maximum allowable input supply voltage for PEF 4268 F V1.2?
The absolute maximum unregulated supply voltage is 40 V DC. Operation above this level risks permanent damage to the internal DC/DC converter and line driver stages. The recommended operating range remains 9–40 V, with thermal derating required above 30 V under full load due to increased switching losses in the integrated flyback stage.
Does PEF 4268 F V1.2 support GR-909 line testing without external microcontroller assistance?
Yes. The Integrated Test and Diagnostic Function (ITDF) executes GR-909-compliant open/short/capacitance/resistance measurements autonomously using internal state machines and ADCs. Host processor interaction is limited to command initiation and result readout via the standard SLIC interface - no external test controller or dedicated firmware is required.
Can multiple PEF 4268 F V1.2 devices share a single DC/DC converter?
No. Each PEF 4268 F V1.2 contains its own dedicated on-chip DC/DC converter optimized for its specific line interface. Sharing converters would compromise isolation, fault containment, and compliance with telecom safety standards (e.g., IEC 60950-1). The SYNC pin coordinates timing only - power domains remain fully independent.
Is the SENSE pin on PEF 4268 F V1.2 compatible with standard ADC inputs?
Yes. The SENSE pin outputs a buffered, rail-to-rail analog voltage (0–3.3 V) linearly proportional to transversal line current (±100 mA full scale). It drives standard 10 kΩ minimum input impedance ADCs directly without external amplification or level shifting, and includes internal ESD protection rated to ±4 kV HBM.
PEF 4268 F V1.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SLIC™, DuSLIC™
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Subscriber Line Interface Concept (SLIC)
- Interface:
- -
- Number of Circuits:
- 1
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TQFP-48-1
PEF 4268 F V1.2 FAQ
1.How can I place an order for PEF 4268 F V1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for PEF 4268 F V1.2 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 PEF 4268 F V1.2 reliable?
The price and inventory of PEF 4268 F V1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PEF 4268 F V1.2 is usually 5 days.
3.What payment methods are accepted for PEF 4268 F V1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PEF 4268 F V1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PEF 4268 F V1.2?
PEF 4268 F V1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PEF 4268 F V1.2 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 PEF 4268 F V1.2?
For technical support, including PEF 4268 F V1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PEF 4268 F V1.2 requirements.
6.How does Aetrix verify that PEF 4268 F V1.2 is sourced from the original manufacturer or authorized distributors?
All PEF 4268 F V1.2 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 PEF 4268 F V1.2 meets industry standards.
7.What is the process for return or replacement of PEF 4268 F V1.2?
All PEF 4268 F V1.2 units undergo pre-shipment inspection (PSI). If there is an issue with PEF 4268 F V1.2, 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 PEF 4268 F V1.2 part is unused and in its original packaging.
Return procedure for PEF 4268 F V1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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