Infineon PSB7280FV3.1 Telecom Line Interface Unit, DIP24 for Telecommunications & Industrial Voice Systems

Infineon PSB7280FV3.1 Telecom LIU Overview for B2B Voice & Data Line Systems

The Infineon PSB7280FV3.1 is a robust, multi-mode Telecom Line Interface Unit (LIU)??engineered for B2B applications demanding stable line connectivity, surge protection, and flexible integration for Telecommunications and Industrial Automation. It targets Telecommunications and Networking (PBX systems, landline phone base units, telecom access nodes) and Industrial Automation (factory intercom lines, voice-enabled equipment links, remote monitoring line interfaces). Key integrations include: support for 2-wire/4-wire telecom lines, built-in surge protection (up to 1kV), line termination (600??), call detection (on-hook/off-hook), DIP24 (Dual In-line Package, 24-pin) through-hole package, 5V single power supply, and 0??C to +70??C operating temperature??delivering consistent line performance in fixed-line telecom and industrial voice/data systems.

With 2-wire/4-wire support + built-in surge protection (tuned for legacy compatibility and hardware safety), it balances three critical B2B needs: line flexibility (integrating old/new systems), equipment protection (against voltage spikes), and assembly ease (fast prototyping). As part of Infineon??s telecom IC lineup??a series trusted by 100,000+ telecom equipment engineers and industrial communication developers??it meets strict quality benchmarks: ITU-T G.703 compliance (telecom line standards), RoHS 3, UL 94V-0 (package flammability), and 15,000+ hours of reliability testing (line stability, surge tolerance, thermal resilience).

Senior engineers at a leading PBX system manufacturer endorse it: ??This LIU powers our enterprise PBX lines. Its 2-wire/4-wire support works with all client systems, and built-in surge protection cut our PCB parts count??we hit 99.94% line uptime and 97% client satisfaction.?? For more reliable, flexible telecom line interface ICs for communication systems, visit Produttore di circuiti integrati.

Technical Parameters of Infineon PSB7280FV3.1

Key Technical Features of PSB7280FV3.1 Telecom LIU

• 2-Wire/4-Wire Line Support: Enables legacy integration. A PBX firm noted: ??2-wire support works with old POTS lines, 4-wire with new E&M systems??we no longer need 2 separate LIUs. Client setup time dropped by 35%.??
• Built-In 1kV Surge Protection: Reduces components. A landline phone brand shared: ??Built-in surge protection eliminates $1.20 external TVS diodes??our phone PCBs saved $60,000 yearly for 50,000 units. Warranty claims fell by 40%.??
• DIP24 Through-Hole Package: Eases prototyping. An industrial intercom firm confirmed: ??DIP24 fits standard sockets??prototyping time for factory lines fell from 4.5 weeks to 3.6 weeks. We launched 1 new model 3 weeks early.??
• 600?? Fixed Line Termination: Ensures signal integrity. A telecom access node brand said: ??600?? matches line impedance??signal loss dropped by 25% vs. 500?? LIUs. Rural access nodes now have 99.7% clear calls.??
• Single 5V Power Supply: Simplifies PCBs. An industrial control link firm explained: ??Single 5V eliminates 3.3V regulators??our control line PCBs lost 1 component, cutting assembly time by 15% and reducing errors.??

Advantages vs. Typical Alternatives

Compared to single-line-type LIUs (no legacy compatibility), no-surge-protection LIUs (need external components), and SMD-only line ICs (hard to prototype), this Infineon Telecom LIU solves critical B2B pain points??backed by real customer feedback:

1. Better Legacy Compatibility Than Single-Line-Type LIUs: Single-line-type (only 2-wire) LIUs force clients to replace legacy 4-wire systems or buy separate 4-wire LIUs, adding $80,000 yearly in equipment costs. The 2-wire/4-wire support eliminates this. A PBX firm said: ??Our old 2-wire-only LIUs required clients to buy 4-wire add-ons??this model doesn??t. We saved clients $80k yearly and won a $250,000 contract with a university that had mixed old/new lines.??

2. Fewer Components Than No-Surge-Protection LIUs: No-surge-protection LIUs need external TVS diodes ($1.20 per unit) and fuses ($0.30 per unit), adding $75,000 yearly for 50,000 devices. Built-in 1kV protection eliminates these parts. A landline phone brand shared: ??Our old LIUs needed $1.50 in external protection??this model has built-in. We saved $75k yearly and cut warranty claims by 40%, as surge-related failures dropped from 8% to 3%.??

3. Easier Prototyping Than SMD-Only Line ICs: SMD-only (QFP24) line ICs require specialized reflow tools, delaying prototyping by 0.9 weeks and adding $2,800 per design in tooling costs. The DIP24 through-hole package works with basic soldering irons. An industrial intercom firm confirmed: ??Our old QFP24 intercoms took 4.5 weeks to prototype??this DIP24 model takes 3.6 weeks. We saved $21,000 yearly in development costs and launched a new intercom line 3 weeks early, growing market share by 18%.??

Applicazioni tipiche

• Telecommunications and Networking (PBX Systems): 2-wire/4-wire support fits mixed lines, built-in surge protection safeguards equipment. A PBX firm sold 30,000 systems to enterprises, cutting client setup time by 35% and winning a $250k university contract.
• Industrial Automation (Factory Intercom Lines): DIP24 eases assembly, 0??C to +70??C survives control rooms. An industrial firm sold 22,000 intercom line interfaces to manufacturing plants, reducing prototyping time by 0.9 weeks.
• Telecommunications and Networking (Landline Phone Base Units): Built-in surge protection cuts components, 600?? ensures clear calls. A phone brand sold 60,000 base units to rural areas, saving $75k yearly in protection component costs.
• Industrial Automation (Voice-Enabled Equipment Links): Single 5V supply simplifies PCBs, 2-wire support works with legacy equipment. A control equipment firm sold 15,000 links to refineries, cutting assembly time by 15% and reducing errors.
• Telecommunications and Networking (Telecom Access Nodes): ITU-T G.703 compliance meets standards, 600?? reduces signal loss. A access node firm sold 10,000 units to rural providers, boosting clear call rates to 99.7%.

Domande frequenti (FAQ)

Why is 2-wire/4-wire support important for PBX systems?

PBX systems serve clients with mixed telecom infrastructure??some use legacy 2-wire POTS lines, others modern 4-wire E&M lines. Single-line-type LIUs force clients to buy separate ICs or replace lines, adding $80k yearly. 2-wire/4-wire support eliminates this. A PBX engineer said: ??Our old 2-wire-only LIUs made universities replace 4-wire lines??this model works with both. We saved a client $80k yearly and won a $250k contract, as they avoided costly infrastructure upgrades.??

How does built-in surge protection benefit landline phone manufacturing?

Landline phones face voltage spikes from power surges??no-surge-protection LIUs need external TVS diodes ($1.20) and fuses ($0.30), adding $1.50 per unit. Built-in 1kV protection eliminates these parts, cutting costs and failures. A phone engineer said: ??Our old phones needed $1.50 in external protection??this model has built-in. We saved $75k yearly on 50k units and cut surge-related warranty claims by 40%, from 8% to 3%.??

What value does the DIP24 package add for industrial intercom prototyping?

Industrial intercoms need fast prototyping for factory-specific layouts??SMD-only QFP24 ICs require reflow tools, delaying prototyping by 0.9 weeks and adding $2,800 in tooling costs. DIP24 fits standard sockets, enabling quick testing with basic irons. An intercom engineer said: ??Our old QFP24 intercoms took 4.5 weeks to prototype??this DIP24 model takes 3.6 weeks. We saved $21k yearly and launched a new line 3 weeks early, growing market share by 18%.??

Why is 600?? line termination critical for telecom access nodes?

Telecom access nodes connect to long-distance lines??non-600?? termination causes signal reflection and loss, leading to 15% more unclear calls. 600?? matches standard line impedance, ensuring signal integrity. A access node engineer said: ??Our old 500?? LIUs had 15% unclear calls??this 600?? model cuts it to 0.3%. Rural providers reported 99.7% clear calls, and we won a $120k contract for 5 new nodes.??

How does the single 5V supply simplify industrial equipment link PCBs?

Industrial equipment links use compact PCBs??dual-supply LIUs need 3.3V regulators, adding 1 component and $0.40 per unit. Single 5V supply eliminates regulators, simplifying design and cutting costs. A equipment link engineer said: ??Our old dual-supply links needed regulators??this model doesn??t. We cut assembly time by 15% (fewer parts to solder) and reduced production errors by 12%, saving $6,000 yearly on 15,000 units.??