PEF2256HV2.2 - Quad E1/T1/J1 Framer & LIU | Infineon | MQFP-80
Teilenummer: PEF2256HV2.2 ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $38.5 | $38,50 |
| 10 | $34.2 | $342,00 |
| 100 | $28.9 | $2.890,00 |
| 250 | $25.4 | $6.350,00 |
| 500 | $22.1 | $11.050,00 |
PEF2256HV2.2 Übersicht
A Line Interface Unit (LIU) is the analog front-end of a TDM telecom system that interfaces between the physical twisted-pair line and the digital PCM backplane. The PEF2256 quad-LIU topology places four such analog interfaces on one chip, allowing one device to terminate an entire T1/E1 quad trunk - reducing board area, BOM count, and power per channel compared with four discrete LIUs. The device belongs to the FALC56 family of framers and line interface components, itself part of the broader framer/line-interface-unit category within telecom interface ICs.
Key features include programmable pulse shaping for short-haul and long-haul operation, integrated receive equalization, on-chip jitter attenuator, HDLC controllers per channel, and a flexible parallel micro-controller interface. The device handles both unipolar and bipolar line signalling and provides diagnostic loopback modes (local, remote, payload) per channel. Built-in BERT (Bit Error Rate Test) pattern generation and checking aid field deployment and production test.
Typical applications include ISDN PRI (Primary Rate Interface) cards, channel banks, digital cross-connect systems, PBX trunk interfaces, cellular base station backhaul, and multi-port T1/E1/J1 line cards. With four channels per chip, designers can build a 4-port line card with one LIU, simplifying PCB layout and reducing overall system cost.
When designing with the PEF2256HV2.2, ensure the analog line-side circuits (transformer, protection, termination) are placed close to the LIU pins to minimize crosstalk between the four on-chip channels. The internal jitter attenuator simplifies clock-recovery design and is configurable per channel via the microcontroller interface.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes that complement the manufacturer datasheet. Prices are listed as of 2026-10-09 from authorized distributors.
Drop-in-Alternativen für PEF2256HV2.2 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PEF2256HV2.1
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PEF2256HV1.2
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PEF2256HV2.0
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PEF2256HV2.2 Technische Daten
| Funktion | Quad E1/T1/J1 Framer and Line Interface Unit (LIU) |
| Family | FALC56 |
| Number of Channels | 4 (quad) |
| Supported Line Rates | E1 (2.048 Mbps), T1/J1 (1.544 Mbps) |
| Line Type | Long-haul and short-haul |
| PCM Highway Interface | H.100 / H.110 / H-MVIP |
| Gehäuse | P-MQFP-80-1 (Metric QFP, 80-pin) |
| Pin-Anzahl | 80 |
| Terminal Form | Gull-wing |
| Package Code | QFP (square, Metric Quad Flat Pack) |
| Temperature Grade | Industrial |
| On-chip Jitter Attenuator | Yes (per channel) |
| HDLC Controllers | Yes (per channel) |
| BERT Support | Yes (pattern generation/check) |
| Diagnostic Loopback | Local, remote, payload (per channel) |
| Microcontroller Interface | Parallel |
| RoHS-Status | Compliant (Infineon product family standard) |
| Montageart | Surface Mount |
PEF2256HV2.2 qfp (square, metric quad flat pack) Pinbelegungsleitfaden
Pinbelegung für PEF2256HV2.2 (qfp (square, metric quad flat pack)-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für PEF2256HV2.2.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
PEF2256HV2.2 ist geeignet für 6 Anwendungs: ISDN PRI Line Card, Cellular Base Station Backhaul Termination, Multi-Port T1/E1/J1 Router Module, Digital Cross-Connect System (DCS), Channel Bank Aggregation, PBX Trunk Interface Card.
ISDN PRI Line Card
The PEF2256HV2.2's four independent E1/T1/J1 framer/LIU channels make it ideal for ISDN Primary Rate Interface (PRI) line cards where one chip terminates all four PRI trunks. With 4 channels on a single die, designers replace four discrete LIUs with one device, cutting board area by approximately 60% and BOM cost proportionally. Per-channel HDLC controllers handle the D-channel signalling overhead, while the H.100/H.110/H-MVIP interface ties directly into standard CT-bus backplanes used in telecom cards. Industrial temperature grade suits central-office deployment.
Empfohlen
Cellular Base Station Backhaul Termination
Cellular base stations require E1/T1 leased-line backhaul to interconnect BTS and BSC nodes. The PEF2256HV2.2 terminates up to four backhaul trunks simultaneously, with on-chip per-channel jitter attenuators delivering clean clock recovery required for cellular timing synchronization. Long-haul line support handles multi-kilometre plant without external repeaters. The industrial temperature grade and surface-mount MQFP-80 package suit outdoor-cabinet and base-station rack-mount deployment where reliability is critical.
Empfohlen
Multi-Port T1/E1/J1 Router Module
Multi-service routers and access concentrators require modular T1/E1 ports for WAN connectivity. The PEF2256HV2.2's quad-LIU integration lets a router module deliver 4 WAN ports with a single FALC56 chip, simplifying board layout and reducing power per port. The flexible parallel microcontroller interface allows the router CPU to control all four channels with a single driver stack. Built-in BERT per channel enables on-field commissioning and link diagnostics without external test equipment.
Empfohlen
Digital Cross-Connect System (DCS)
Digital cross-connect systems re-route DS0/DS1/E1 timeslots between multiple T1/E1 trunks without back-to-back FRADs. The PEF2256HV2.2's quad-LIU density suits DCS line cards where many trunks converge. On-chip HDLC controllers per channel handle SS7 signalling transparently. H-MVIP compatibility allows timeslot switching fabrics to share PCM highway bandwidth across the cross-connect backplane, while industrial temperature grade suits central-office and outdoor-cabinet DCS deployments.
Empfohlen
Channel Bank Aggregation
Channel banks aggregate multiple voice circuits onto T1/E1 trunks for transport. The PEF2256HV2.2 quad-LIU handles four trunks in a single device, ideal for small-to-medium channel banks where density matters. Built-in jitter attenuation per channel keeps DS0 voice quality clean across the aggregation backplane. Programmable pulse shaping supports both short-haul DSX-1 cross-connects and long-haul CSUs in the same design, simplifying inventory across channel-bank product lines.
Empfohlen
PBX Trunk Interface Card
Enterprise PBX systems require T1/E1 PRI trunks for connectivity to the PSTN and ISDN networks. The PEF2256HV2.2 quad-LIU lets a PBX trunk card deliver 4 PRI spans (up to 120 voice channels in E1 mode or 96 in T1 mode) with a single FALC56 device. HDLC controllers per channel handle Layer-2 D-channel signalling. The parallel microcontroller interface allows direct connection to the PBX mainboard CPU without an intermediate bridge, simplifying firmware and reducing latency for call-setup messaging.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PEF2256HV2.2 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PEF2256HV2.1 | PEF2256HV1.2 | PEF2256HV2.0 |
|---|---|---|---|---|
| Package | P-MQFP-80-1 (Metric QFP, 80-pin) | P-MQFP-80-1 - same | P-MQFP-80-1 - same | P-MQFP-80-1 - same |
| Brand | Infineon | Infineon | Infineon | Infineon |
| Number of Channels | 4 (quad) | 4 (quad) | 4 (quad) | 4 (quad) |
| Supported Line Rates | E1/T1/J1 | E1/T1/J1 | E1/T1/J1 | E1/T1/J1 |
| Silicon Revision | v2.2 | v2.1 | v1.2 | v2.0 |
| Jitter Attenuator | Yes (per channel) | Yes (per channel) | Yes (per channel) | Yes (per channel) |
| HDLC Controllers | Yes (per channel) | Yes (per channel) | Yes (per channel) | Yes (per channel) |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial |
Wichtigste Unterscheidungsmerkmale
- Quad-LIU integration on a single die (vs. Discretel-LIU designs)
- Industrial temperature grade in MQFP-80 (vs. Commercial-grade T1/E1 LIUs)
- Per-channel on-chip jitter attenuator (vs. LIUs requiring external jitter attenuator ICs)
Designhinweise
Place the four analog LIU line-side circuits (transformer, secondary protection, termination resistor network) as close as possible to the corresponding LIU pins to minimize crosstalk between the four on-chip channels. Use a dedicated analog ground plane beneath the line-side circuitry, tied to the chip's analog ground pin at a single point near the IC. Route the four receive and transmit pairs as differential microstrip with controlled 100-ohm differential impedance.
The PEF2256HV2.2 typically requires multiple supply rails (e.g., 3.3V digital, 5V analog) - decouple each pin with a 100nF ceramic plus a 10uF bulk capacitor placed within 5mm of the supply pin. According to FALC56 datasheet guidance, use separate regulator outputs for the analog and digital supplies and place ferrite beads between them if a single regulator must be shared, to keep digital switching noise out of the analog LIU section.
Do not assume the four on-chip LIU channels are fully independent at power-up - the microcontroller interface must explicitly configure each channel's line rate, pulse shape and termination mode before the corresponding trunk is enabled. Failing to do so can leave a channel in an undefined state that draws excess current or fails to detect line signals. Also ensure the H.100/H.110 PCM highway clock is stable before releasing the device's reset to avoid PCM bus contention on multi-card backplanes.
Compliance-Informationen
RoHS compliant per Infineon product family standard. P-MQFP-80-1 package is lead-free with matte-tin plating. AEC-Q100 not applicable - this is a telecom infrastructure IC, not an automotive-grade part.
