Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Interface > Telecom

Infineon Technologies PEF 2426 H V1.1 D

Name: PEF 2426 H V1.1 D
Brand: Infineon Technologies
SKU: PEF 2426 H V1.1 D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: PEF 2426 H V1.1 D

Manufacturer:: Infineon Technologies

Category:: Telecom

Package:: 44-QFP

Datasheet:: PEF 2426 H V1.1 D.pdf

Description:: IC TELECOM INTERFACE MQFP-44

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,725

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

PEF 2426 H V1.1 D from Infineon Technologies is a Quad ISDN High Voltage Power Controller (QIHPC) designed for line feed power management in digital telephony systems. It delivers up to 130 V DC per ISDN U-line, supports four independent lines with programmable current limiting (via external resistors), overcurrent indication delay (via external capacitors), and integrated thermal shutdown. Used in central office line cards compliant with ETSI TS 102 080.

For engineers reviewing the PEF 2426 H V1.1 D datasheet, PEF 2426 H V1.1 D pinout, PEF 2426 H V1.1 D application, or PEF 2426 H V1.1 D equivalent, key selection criteria include per-line current monitoring resolution, relay driver output capability (open-collector, 100 mA), thermal protection behavior, and compatibility with PEB 24901/24911/2491 interface ICs.

Technical Context

The PEF 2426 implements four independent high-voltage line feed controllers using Smart Power Technology (170 V breakdown), each with dual-threshold current sensing: one for overcurrent indication (NACKx assertion) and a higher threshold for active current limiting. Control logic accepts PF1–PF4 enable signals and returns status via NACK1–NACK4 open-drain outputs.

It integrates eight high-current open-collector relay drivers (RDout1–RDout8), each driven by corresponding RDin1–RDin8 inputs, supporting external mechanical or solid-state relays for line switching. Thermal protection operates in two stages: individual line disable during sustained current limit, and full device shutdown at chip temperature >150 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
Max Line Voltage	130 V DC - supports full ETSI-compliant ISDN U-interface line feed without external boost circuitry.
Line Count	4 independent channels - enables single-chip control of quad-line ISDN concentrators or multi-port line cards.
Current Limit Threshold	Programmable via RF resistor - sets hard current clamp (e.g., 120 mA typical) to prevent cable overheating.
Overcurrent Indication Delay	Programmable per line via CS1–CS4 capacitors - allows adjustable t_OC (e.g., 10–100 ms) to ignore transient surges.
Relay Driver Output	Open-collector, 100 mA sink - directly drives standard telecom relays without external transistors.
Thermal Shutdown	Two-stage: per-line disable at 140 °C junction, full shutdown at 150 °C - prevents thermal runaway while preserving partial functionality.
Package	P-MQFP-44 (10 × 10 mm, 0.8 mm pitch) - surface-mount compatible with high-density line card layouts.

Pinout & Package

PEF 2426 H V1.1 D uses a 44-pin Plastic Metric Quad Flat Package (P-MQFP-44) with exposed thermal pad, optimized for high-voltage isolation and thermal dissipation in telecom line card applications.

Pin/Terminal	Circuit Role	Design Meaning
PF1–PF4	Power Feed Enable Inputs	Active-high TTL/CMOS control signals enabling line feed for each of four ISDN lines.
NACK1–NACK4	Overcurrent Status Outputs	Open-drain outputs asserting low when line current exceeds programmed threshold for >t_OC.
RDin1–RDin8	Relay Driver Control Inputs	Logic-level inputs controlling eight integrated open-collector relay drivers.
RDout1–RDout8	Relay Driver Outputs	High-current (100 mA) open-collector outputs driving external telecom relays.
D1–D4	High-Voltage Line Outputs	DMOS high-side outputs delivering up to 130 V to ISDN U-line interfaces.
RFpos / RFneg	Current Sense Reference	Differential inputs connecting external RF resistor to set current limit threshold.
CS1–CS4	Overcurrent Delay Timing	Capacitor connections setting individual t_OC delay per line (e.g., 10 nF → ~20 ms).
VDD / GND	Logic Supply	5 V ±10 % digital supply for internal logic and drivers; separate from high-voltage domain.

Key Features

Feature	Design Value
Per-line programmable current limiting	Enables precise cable-safe current clamping (e.g., 110–130 mA) without redesigning PCB layout.
Independent overcurrent indication delay	Allows tuning t_OC per line to accommodate varying loop lengths and transient profiles.
Integrated 8-channel relay drivers	Eliminates eight discrete driver transistors and associated biasing components on line cards.
Two-stage thermal protection	Maintains partial system operation during overload while preventing permanent damage under fault conditions.
ETSI TS 102 080 compliance	Meets European standard for ISDN basic rate interface power feed, simplifying regulatory certification.

Applications

ISDN Central Office Line Card

Multi-Port ISDN Terminal Adapter

Use Scenario: 16-line telecom shelf with four PEF 2426 devices managing 64 U-interfaces across multiple slots.

IC Role / Device Role / Timing Role: High-voltage line feed controller providing regulated -48 V derived power, current monitoring, and relay-based line switching.

Use Value: Reduces component count by 32 discrete drivers and enables centralized fault detection via NACKx status reporting.

Use Scenario: Compact desktop ISDN TA supporting four simultaneous BRI lines with line seizure and polarity reversal.

IC Role / Device Role / Timing Role: Quad-line power source and relay sequencer coordinating line activation, battery backup switchover, and fault isolation.

Use Value: Enables full ETSI-compliant line feed in <100 cm² PCB area, with automatic thermal rollback during extended loop tests.

DSLAM Line Interface Module

ISDN Test & Emulation Equipment

Use Scenario: Hybrid DSL/ISDN access node requiring backward-compatible ISDN support alongside VDSL2.

IC Role / Device Role / Timing Role: Dedicated ISDN line power manager interfacing with PEB 2491 (QUAD-U) analog front-end.

Use Value: Guarantees interoperability with legacy ISDN terminals while sharing board space and thermal budget with DSL PHY.

Use Scenario: Lab-grade ISDN protocol analyzer simulating up to 4 concurrent U-interface loops with configurable faults.

IC Role / Device Role / Timing Role: Programmable line feed injector enabling controlled short-circuit, open-loop, and overload testing.

Use Value: Supports automated conformance testing per ETSI EN 300 096 with repeatable current-limit and thermal-fault injection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN line feed controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
PEB 2426	Same die, different marking - identical electrical specs and pinout; H V1.1 D denotes enhanced thermal grade.	No functional difference; used interchangeably in new designs where extended temperature margin is not required.	Select PEB 2426 for cost-sensitive volume production where full industrial temp range is not mandated.
MAX14915	Single-channel, 120 V max, SPI-configurable thresholds - lacks integrated relay drivers and per-line t_OC capacitors.	Requires external drivers and MCU coordination; suited for modular, software-defined line cards rather than fixed-function hardware.	Choose MAX14915 only when design requires digital configurability and distributed control architecture.

Compared with PEB 2426 and MAX14915, the PEF 2426 H V1.1 D uniquely combines quad-channel high-voltage feed, analog-programmable protection, and integrated relay drivers in one MQFP package - eliminating FPGA I/O overhead and reducing BOM count by ≥24 components versus discrete solutions.

Availability

PEF 2426 H V1.1 D is available at Aetrix Electronics and suitable for ISDN central office line cards, multi-port terminal adapters, and telecom test equipment requiring stable component supply and long-term lifecycle support.

Supply support for PEF 2426 H V1.1 D 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 industrial control ICs, with global R&D and manufacturing infrastructure.

The QIHPC (Quad ISDN High Voltage Power Controller) product line targets telecom infrastructure applications requiring robust, standards-compliant line feed power with integrated protection and relay control - specifically engineered for ETSI-compliant ISDN deployment.

FAQ

What is the maximum continuous output voltage per line?

The PEF 2426 H V1.1 D supports up to 130 V DC per line under steady-state conditions, verified per absolute maximum ratings in the 06.99 preliminary datasheet. This enables full compliance with ETSI TS 102 080 for ISDN U-interface line feed, including battery backup scenarios where nominal -48 V systems may reach +82 V during float charging.

How is current limiting configured for each channel?

Current limiting is set by an external resistor (RF) connected between RFpos and RFneg pins. The datasheet specifies a linear relationship: I_LIM = 1.25 V / R_F, allowing precise adjustment (e.g., 120 mA with 10.4 kΩ). This resistor defines the upper current threshold at which DMOS output enters constant-current mode.

Does the device support automatic polarity reversal for ISDN lines?

No - polarity reversal is not handled internally. The PEF 2426 provides unidirectional high-side line feed (D1–D4). Polarity switching must be implemented externally using relay drivers (RDout1–RDout8) controlling H-bridge or DPDT relays, as shown in Figure 2 and Figure 7 of the datasheet.

What is the function of the CS1–CS4 pins?

CS1–CS4 accept external capacitors that set the overcurrent indication delay (t_OC) per line. As shown in Figure 6, t_OC ≈ 1.2 × C_S × 10⁴ µs (e.g., 10 nF yields ~120 ms). This delay prevents false NACK assertions during inrush or transient events while retaining fast fault detection for sustained overloads.

PEF 2426 H V1.1 D Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 44-QFP

Packaging:: Tray

Product Status:: Obsolete

Function:: High Voltage Power Controller

Interface:: ISDN, SHDSL

Number of Circuits:: 4

Voltage - Supply:: 3V ~ 6V

Current - Supply:: 700µA

Power (Watts):: -

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: P-MQFP-44

PEF 2426 H V1.1 D FAQ

1.How can I place an order for PEF 2426 H V1.1 D through Aetrix?

Please submit a Request for Quotation (RFQ) for PEF 2426 H V1.1 D 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 2426 H V1.1 D reliable?

The price and inventory of PEF 2426 H V1.1 D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PEF 2426 H V1.1 D is usually 5 days.

3.What payment methods are accepted for PEF 2426 H V1.1 D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PEF 2426 H V1.1 D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PEF 2426 H V1.1 D?

PEF 2426 H V1.1 D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PEF 2426 H V1.1 D 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 2426 H V1.1 D?

For technical support, including PEF 2426 H V1.1 D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PEF 2426 H V1.1 D requirements.

6.How does Aetrix verify that PEF 2426 H V1.1 D is sourced from the original manufacturer or authorized distributors?

All PEF 2426 H V1.1 D 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 2426 H V1.1 D meets industry standards.

7.What is the process for return or replacement of PEF 2426 H V1.1 D?

All PEF 2426 H V1.1 D units undergo pre-shipment inspection (PSI). If there is an issue with PEF 2426 H V1.1 D, 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 2426 H V1.1 D part is unused and in its original packaging.

Return procedure for PEF 2426 H V1.1 D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…

2026-08-11 LDO Regulator: Dropout Voltage, Noise, PSRR and Power Dissipation

LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…

2026-08-06 Conditional Access Module: CAM, CI/CI+ and DVB Security

Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…

2026-08-03 Electronic Component Obsolescence: EOL Risks, Replacement Options and Last-Time Buy Strategy

Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.

2026-07-29 18650 Battery: Voltage, Capacity, Charging and Pack Design

18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…

2026-07-27 Hall Effect Sensor: Working Principle, Types, Circuits and Applications

Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…

2026-07-20 Product Change Notification (PCN) in Electronic Components: Meaning and Supply Chain Response

Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…

2026-07-19 Blend Door Actuator: Symptoms, Location, Reset and Replacement Guide

A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…