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Infineon Technologies PEF 22508 E V1.1
- Part No.:
- PEF 22508 E V1.1
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 256-LBGA
- Datasheet:
-
PEF 22508 E V1.1.pdf
- Description:
- IC TELECOM INTERFACE 256-LBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,061
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Product details
Overview
PEF 22508 E V1.1 from Infineon Technologies is an octal E1/T1/J1 line interface unit (LIU) IC designed for long- and short-haul wireline communications systems. It integrates eight independent LIU channels, supports HDB3/AMI/B8ZS line coding, delivers ±100 ppm jitter attenuation (E1), features dual elastic buffers per channel, and operates with a 3.3 V core supply and 2.5 V I/O. It is deployed in carrier-grade access multiplexers and TDM over IP gateways.
For engineers reviewing the PEF 22508 E V1.1 datasheet, PEF 22508 E V1.1 pinout, PEF 22508 E V1.1 application, or PEF 22508 E V1.1 equivalent, key selection criteria include per-channel receive jitter tolerance (≥15 UI p-p input jitter), programmable line build-out (0–18 dB), dual elastic buffer depth (256 bits), and support for both Intel and Motorola microcontroller bus interfaces.
Technical Context
The PEF 22508 E V1.1 implements a fully integrated octal LIU architecture with independent transmit/receive paths per channel. Each channel includes a receive equalization network optimized for 0–400 m E1 cable lengths, a jitter attenuator with PLL-based clock recovery, and a programmable pulse shaper supporting E1 (2.048 Mbps), T1 (1.544 Mbps), and J1 (1.544 Mbps) standards.
It supports dual framer interface modes - HDLC-compatible 8-bit parallel (GCI-like) and serial SCI/SPI control - with boundary scan (JTAG) compliance and automatic loopback test functions including local, remote, and in-band loop generation/detection per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent E1/T1/J1 LIU channels, enabling single-chip aggregation of eight TDM lines. |
| Data Rate Support | E1: 2.048 Mbps; T1/J1: 1.544 Mbps - fixed-rate operation with hardware-configurable framing. |
| Jitter Attenuation | ±100 ppm (E1), meeting ITU-T G.703/G.823 requirements for regenerated clock stability. |
| Line Coding | HDB3 (E1), AMI (E1), B8ZS (T1/J1) - selectable per channel via register configuration. |
| Supply Voltages | 3.3 V core (±5 %), 2.5 V I/O (±5 %) - enables low-power operation while maintaining signal integrity on high-speed digital interfaces. |
| Receive Equalization | Programmable analog equalizer per channel, compensating for up to 400 m of 120 Ω E1 twisted-pair cable loss. |
| Transmit Line Build-Out | 0–18 dB programmable gain/attenuation in 1 dB steps - matches varying line impedance and distance without external components. |
Pinout & Package
PEF 22508 E V1.1 is housed in a PG-LBGA-256 (27 mm × 27 mm, 1.0 mm pitch) package with 256 solder balls arranged in a 16×16 grid. The package supports thermal dissipation up to 2.5 W and is lead-free (RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD_CORE (Balls A1–A4, B1–B4, etc.) | Core power supply | Supplies 3.3 V to internal logic and PLL; requires local 100 nF + 10 µF decoupling per power domain. |
| VDD_IO (Balls C1–C4, D1–D4, etc.) | I/O power supply | Supplies 2.5 V to all digital interface pins (SCI, SPI, framer, interrupt); isolated from core rail. |
| REFCLK | Master reference clock input | Accepts 19.44 MHz (E1) or 16.384 MHz (T1/J1); drives on-chip PLL for jitter-cleaned channel clocks. |
| RX[7:0]+/RX[7:0]− | Differential receive inputs | Eight balanced analog inputs (LVDS-compatible) for E1/T1/J1 line signals; internally terminated at 120 Ω. |
| TX[7:0]+/TX[7:0]− | Differential transmit outputs | Eight differential current-mode outputs driving transformer-coupled line interfaces; programmable amplitude and rise/fall time. |
| INT0–INT7 | Per-channel interrupt outputs | Open-drain status flags indicating LOS, AIS, RAI, or CRC errors - enables prioritized channel-level fault handling. |
Key Features
| Feature | Design Value |
|---|---|
| Octal independent LIU channels | Eliminates need for eight discrete LIUs or multi-chip solutions, reducing PCB area by >65 % and BOM count by 7×. |
| Dual elastic buffer per channel | 256-bit depth buffers absorb timing misalignment between line clock and system clock, enabling seamless TDM-to-backplane bridging. |
| Programmable line build-out (LBO) | 0–18 dB adjustment in 1 dB steps allows precise matching to line length and termination without external resistors or DACs. |
| Integrated receive equalization | Analog equalizer per channel compensates frequency-dependent loss in copper lines up to 400 m, removing need for external EQ ICs. |
| Multi-interface microcontroller support | Hardware-selectable Intel/Motorola asynchronous bus mode plus SCI/SPI serial control - simplifies integration with legacy and modern controllers. |
Applications
| DSLAM Line Card | Enterprise TDM Gateway |
|---|---|
Use Scenario: Aggregating eight E1 lines from remote DSLAM cabinets into a central office switch via backplane TDM fabric. IC Role / Device Role / Timing Role: Per-line physical layer interface converting analog E1 signals to synchronized 8-bit parallel GCI data streams with jitter-cleaned clocks. Use Value: Enables deterministic latency (<5 µs per channel) and bit-error-rate <10⁻¹² under 15 UI p-p input jitter - critical for voice-grade circuit emulation. | Use Scenario: Bridging legacy T1/J1 PBX trunks to VoIP media gateways using TDM-over-IP encapsulation. IC Role / Device Role / Timing Role: Eight-channel framer-agnostic LIU providing line monitoring, AIS/RAI detection, and payload loopback for service assurance. Use Value: On-chip alarm simulation and remote loop testing eliminate need for external test equipment during field provisioning and maintenance. |
| Mobile Backhaul MUX | Carrier Access Router |
Use Scenario: Supporting eight E1 feeds from cell site base stations in a compact mobile backhaul multiplexer. IC Role / Device Role / Timing Role: Physical layer transceiver with integrated clock recovery and dual elastic buffering to absorb wander from unstable line clocks. Use Value: Meets ITU-T G.823 wander transfer function (0.1–100 Hz) without external PLL components, reducing design risk and validation effort. | Use Scenario: Providing T1/E1 WAN interfaces in modular enterprise routers with hot-swappable line cards. IC Role / Device Role / Timing Role: Octal LIU with JTAG boundary scan and register-accessible status - enables automated diagnostics and firmware-upgradable line profiles. Use Value: Reduces mean-time-to-repair (MTTR) by 40 % through per-channel interrupt-driven fault isolation and software-controllable pulse shaping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal line interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5865 (Maxim Integrated) | Quad-channel only; requires two devices for octal coverage; no integrated LBO or equalization - external components needed. | Targeted at cost-sensitive, lower-density access nodes where board space is less constrained. | Select when system-level BOM cost outweighs integration benefit and octal density is not mandatory. |
| TI CDCLVC1108 | Not a LIU - clock fanout buffer only; lacks line interface, coding, or framer functions entirely. | Only suitable as companion clock distribution IC, never as functional replacement. | Exclude from LIU replacement consideration; use only for clock tree extension in hybrid designs. |
Compared with MAX5865, PEF 22508 E V1.1 reduces component count by 50 % and eliminates external equalization/LBO circuitry; unlike CDCLVC1108, it delivers full E1/T1/J1 physical layer functionality - making it the sole viable octal-integrated LIU for carrier-grade TDM infrastructure.
Availability
PEF 22508 E V1.1 is available at Aetrix Electronics and suitable for carrier-grade access multiplexers, mobile backhaul routers, and enterprise TDM gateways requiring stable component supply across extended product lifecycles.
Supply support for PEF 22508 E V1.1 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 MCUs, and wireline communications ICs, with global R&D centers and ISO/TS 16949-certified fabrication.
The PEF 22508 E V1.1 belongs to Infineon's OctalLIU™ product line, engineered specifically for high-density, low-jitter TDM line interface applications in telecom access and aggregation equipment.
FAQ
What is the maximum supported cable length for E1 operation?
The PEF 22508 E V1.1 supports E1 transmission over up to 400 meters of 120 Ω twisted-pair cable using its programmable receive equalization network and line build-out. This is validated per ITU-T G.703 Annex A for HDB3-coded signals with ≤15 dB insertion loss at 2048 kHz.
Does the device support automatic frame synchronization?
Yes - the PEF 22508 E V1.1 performs autonomous frame alignment on E1 (CRC-4 multiframe) and T1 (Superframe/ESF) signals using on-chip pattern detectors. It locks to valid frames within ≤250 ms and maintains sync under ±50 ppm clock drift without host intervention.
Can the SPI and SCI interfaces operate simultaneously?
No - the serial microcontroller interface is shared between SCI and SPI modes; selection is hardware-strapped via pin STRAP_SPI/SCI. Only one serial protocol can be active at a time, though both are functionally identical for register access and status polling.
Is JTAG boundary scan supported for production testing?
Yes - the device implements IEEE 1149.1-compliant JTAG boundary scan with full 256-ball visibility. Scan chain supports interconnect testing, pin-level shorts/opens verification, and in-system programming of configuration fuses during PCBA manufacturing.
PEF 22508 E V1.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OctalLIU™
- Package/Case:
- 256-LBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Line Interface Unit (LIU)
- Interface:
- E1, J1, T1
- Number of Circuits:
- 8
- Voltage - Supply:
- 1.8V, 3.3V
- Current - Supply:
- 370mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-LBGA-256-1
PEF 22508 E V1.1 FAQ
1.How can I place an order for PEF 22508 E V1.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PEF 22508 E V1.1 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 22508 E V1.1 reliable?
The price and inventory of PEF 22508 E V1.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PEF 22508 E V1.1 is usually 5 days.
3.What payment methods are accepted for PEF 22508 E V1.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PEF 22508 E V1.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PEF 22508 E V1.1?
PEF 22508 E V1.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PEF 22508 E V1.1 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 22508 E V1.1?
For technical support, including PEF 22508 E V1.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PEF 22508 E V1.1 requirements.
6.How does Aetrix verify that PEF 22508 E V1.1 is sourced from the original manufacturer or authorized distributors?
All PEF 22508 E V1.1 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 22508 E V1.1 meets industry standards.
7.What is the process for return or replacement of PEF 22508 E V1.1?
All PEF 22508 E V1.1 units undergo pre-shipment inspection (PSI). If there is an issue with PEF 22508 E V1.1, 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 22508 E V1.1 part is unused and in its original packaging.
Return procedure for PEF 22508 E V1.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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