My Inquiry
My Account
Infineon Technologies PEF 2055 N V2.1
.jpg)
- Part No.:
- PEF 2055 N V2.1
- Manufacturer:
- Infineon Technologies
- Category:
- Telecom
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
PEF 2055 N V2.1.pdf
- Description:
- IC TELECOM INTERFACE 44LCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,685
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PEF 2055 N V2.1 from Siemens AG is a programmable Extended PCM Interface Controller (EPIC®-1) designed for digital line card and packet handler applications in ISDN and PCM-based telecommunication systems. It supports dual-interface operation (PCM + Configurable Interface), provides 32-channel time-slot switching, integrates pre-processed D-channel handling, and operates with 5 V supply and 20 MHz master clock.
For engineers reviewing the PEF 2055 N V2.1 datasheet, PEF 2055 N V2.1 pinout, PEF 2055 N V2.1 application, or PEF 2055 N V2.1 equivalent, this device serves as a core layer-1 controller for decentralized D-channel processing, mixed signaling architectures, and synchronous data routing in digital access networks - requiring precise timing alignment, register-level memory mapping, and interface configurability.
Technical Context
The PEF 2055 implements a dual-bus architecture: one dedicated to PCM frame handling (up to 32 time slots per 2.048 Mbps E1 frame), and another configurable interface (CFI) supporting custom bit-level framing for D-channel or packetized control data. Its internal memory structure includes separate upstream/downstream data memory (DM) and control memory (CM), each accessible via indirect addressing using MACR/MAAR/MADR registers.
It features hardware-assisted switching with subchannel granularity, programmable PCM offset and clock shift registers (POFD, POFU, PCSR), and integrated handlers for Monitor/Feature (MF) and Control/Signaling (CS) channels - enabling real-time D-channel message extraction without microprocessor intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Type | Dual-interface: PCM (E1/T1 compatible) + Configurable Interface (CFI) for custom framing |
| Channel Capacity | 32 time slots per PCM frame; supports subchannel switching down to 1-bit granularity |
| Supply Voltage | 5 V ±5 % - enables direct integration into legacy telecom power domains |
| Master Clock | 20 MHz - synchronizes all internal state machines and memory access cycles |
| Memory Architecture | Separate upstream/downstream Data Memory (DM) and Control Memory (CM), each 256 × 16-bit |
| Reset Behavior | Hardware reset initializes all registers to default values and clears DM/CM tristate fields |
| Interrupt Support | Dedicated ISTA register with maskable sources including FIFO full, timer expiry, and interface errors |
Pinout & Package
PEF 2055 N V2.1 is housed in a 100-pin plastic quad flat package (PQFP) with 0.65 mm pitch, compliant with JEDEC MS-026. Pin functions are defined per the Siemens User's Manual 02.97, Section 1.2–1.3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Master Clock Input | 20 MHz system timing reference; drives all internal state machines and memory access cycles |
| RESET | Active-Low Asynchronous Reset | Clears all registers, resets DM/CM tristate fields, and forces hardware initialization sequence |
| PCM_CLK | PCM Frame Clock Output | Provides 2.048 MHz E1 frame sync signal derived from CLK; used to synchronize external PCM devices |
| PCM_DATA | PCM Serial Data I/O | Bidirectional serial bus for PCM frame transmission/reception; supports TDM multiplexing |
| CFI_DATA | Configurable Interface Data I/O | Bit-serial interface for D-channel or control packets; bit rate and framing programmable via CMD1/CMD2 |
| INT | Interrupt Request Output | Open-drain active-low signal indicating pending interrupt conditions per ISTA register status |
| ADDR[7:0] | Microprocessor Address Bus | 8-bit address for indirect memory/register access; used with MACR/MAAR for DM/CM read/write |
| DATA[7:0] | Microprocessor Data Bus | 8-bit bidirectional data path for register reads/writes and memory transfers via MADR |
Key Features
| Feature | Design Value |
|---|---|
| Pre-processed D-channel handling | Hardware-accelerated extraction and insertion of D-channel messages without CPU overhead |
| Subchannel switching | Enables routing of individual bits or nibbles between PCM and CFI interfaces for protocol adaptation |
| Programmable PCM offset | POFD/POFU registers allow dynamic alignment of downstream/upstream PCM frames to compensate for propagation delay |
| Synchronous Transfer Utility | STDA/STDB and SARA/SARB registers enable burst-mode DMA-like transfers between µP and internal memories |
| Monitor/Feature Handler (MF) | Supports command-driven feature activation (e.g., loopback, test modes) via MFFIFO and MFSAR registers |
Applications
| Digital Line Card | Analog Line Card |
|---|---|
|
Use Scenario: ISDN basic rate (2B+D) or primary rate (30B+D) line termination in central office or remote concentrator. IC Role / Device Role / Timing Role: Layer-1 PCM controller managing E1 frame synchronization, time-slot assignment, and D-channel preprocessing. Use Value: Offloads D-channel parsing from host CPU, reduces firmware complexity, and ensures deterministic latency for signaling. |
Use Scenario: Hybrid analog/digital line card converting POTS signals to PCM for digital switching fabric. IC Role / Device Role / Timing Role: PCM interface bridge between codec (e.g., SLIC) and digital switch fabric; handles frame alignment and channel mapping. Use Value: Enables seamless integration of legacy analog lines into modern digital infrastructure with minimal external logic. |
| Packet Handler | Decentralized D-Channel Node |
|
Use Scenario: Protocol conversion between HDLC-formatted D-channel packets and internal memory-mapped control structures. IC Role / Device Role / Timing Role: Configurable Interface (CFI) endpoint translating bit-serial control packets into parallel memory writes for CS/MF handlers. Use Value: Eliminates need for external FPGA or ASIC glue logic to adapt proprietary signaling protocols. |
Use Scenario: Remote ISDN NT1 unit performing local D-channel termination before aggregation to central switch. IC Role / Device Role / Timing Role: Standalone D-channel processor executing LAPD link-layer functions and passing B-channel payload transparently. Use Value: Reduces backhaul bandwidth by filtering non-essential signaling traffic and enabling local service activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCM interface controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PEB 2055 | Pin-compatible variant with identical register map; differs only in EPIC®-1 vs EPIC®-S revision level and minor timing specs | Same digital line card use case but requires verification of reset timing and clock jitter tolerance per design | Select when sourcing legacy stock or maintaining compatibility with existing PEB 2055-based PCB layouts |
| PEF 2054 | Reduced channel count (16 vs 32 time slots); lacks upstream data memory tristate field initialization capability | Suitable for cost-sensitive BRI applications or single-line ISDN terminals where full E1 capacity is unnecessary | Choose for lower gate count, reduced power, and simplified memory management in non-aggregation roles |
Compared with PEF 2055 N V2.1, PEB 2055 offers identical functionality with minor silicon revision differences affecting startup timing, while PEF 2054 trades half the channel capacity and missing DM tristate control for lower cost and footprint - making it viable only in non-aggregating, low-density D-channel nodes.
Availability
PEF 2055 N V2.1 is available at Aetrix Electronics and suitable for digital line cards, ISDN packet handlers, and analog-to-digital line interface units requiring stable component supply across extended product lifecycles.
Supply support for PEF 2055 N V2.1 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
Siemens AG Semiconductor Group (now Infineon Technologies) was a leading European semiconductor manufacturer specializing in industrial, automotive, and telecommunications ICs until its semiconductor division was spun off in 1999.
PEF 2055 belongs to the EPIC®-1 family of Extended PCM Interface Controllers, developed specifically for layer-1 signal processing in ISDN and PCM-based access networks - emphasizing deterministic timing, hardware-accelerated channel switching, and flexible interface configuration.
FAQ
What is the function of the PCM-Offset Downstream Register (POFD)?
The POFD register configures the phase offset between the internal PCM frame clock and the downstream PCM data stream. It allows fine-grained alignment (±16 bit periods) to compensate for board-level propagation delays or clock skew in multi-chip PCM chains. This ensures reliable sampling of incoming PCM frames without bit slips, especially critical in cascaded line card deployments.
Does PEF 2055 N V2.1 support both E1 and T1 framing?
Yes - the device supports E1 (2.048 Mbps, 32 time slots) and T1 (1.544 Mbps, 24 time slots) through software-configurable PCM mode registers (PMOD) and bit-number-per-frame (PBNR) settings. Frame structure, bit order, and clock polarity are fully programmable, enabling deployment in both European and North American telecom infrastructures without hardware change.
How does the Configurable Interface (CFI) differ from the PCM interface?
The CFI is a bit-serial, fully programmable interface independent of PCM timing - supporting arbitrary bit rates, word lengths, and framing patterns via CMD1/CMD2 registers. Unlike the fixed-format PCM interface, CFI handles D-channel packets, HDLC frames, or proprietary control streams, making it ideal for out-of-band signaling, feature activation, or protocol bridging in hybrid access systems.
Is external memory required for PEF 2055 N V2.1 operation?
No - the device integrates 256 × 16-bit upstream/downstream Data Memory and Control Memory on-die. These memories store time-slot assignments, switching tables, and D-channel buffers. External memory is only needed if the application exceeds internal capacity or requires persistent storage across power cycles - not for standard ISDN line card operation.
PEF 2055 N V2.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- EPIC®
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- PCM Interface Controller
- Interface:
- ISDN, PCM
- Number of Circuits:
- 1
- Voltage - Supply:
- 5V
- Current - Supply:
- 9.5mA
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- P-LCC-44-1
PEF 2055 N V2.1 FAQ
1.How can I place an order for PEF 2055 N V2.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for PEF 2055 N V2.1 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 2055 N V2.1 reliable?
The price and inventory of PEF 2055 N V2.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PEF 2055 N V2.1 is usually 5 days.
3.What payment methods are accepted for PEF 2055 N V2.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PEF 2055 N V2.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PEF 2055 N V2.1?
PEF 2055 N V2.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PEF 2055 N V2.1 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 2055 N V2.1?
For technical support, including PEF 2055 N V2.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PEF 2055 N V2.1 requirements.
6.How does Aetrix verify that PEF 2055 N V2.1 is sourced from the original manufacturer or authorized distributors?
All PEF 2055 N V2.1 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 2055 N V2.1 meets industry standards.
7.What is the process for return or replacement of PEF 2055 N V2.1?
All PEF 2055 N V2.1 units undergo pre-shipment inspection (PSI). If there is an issue with PEF 2055 N V2.1, 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 2055 N V2.1 part is unused and in its original packaging.
Return procedure for PEF 2055 N V2.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PEF 2055 N V2.1 Tags
-
LMC567CMX/NOPB
Texas Instruments
-
LM567CMX/NOPB
Texas Instruments
-
LM567CM/NOPB
Texas Instruments
-
VSC8531XMW-02
Microchip Technology
-
VSC8531XMW-05
Microchip Technology
-
GPY115C0VI
MaxLinear, Inc.
-
SI32185-A-FMR
Skyworks Solutions Inc.
-
VSC8541XMV-05
Microchip Technology
-
SI32178-B-FM1R
Skyworks Solutions Inc.
-
GPY215C0VI
MaxLinear, Inc.
-
CPC7514ZTR
Littelfuse Inc.
-
VSC8502XML-03
Microchip Technology
Tech Hub
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…
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…
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…
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…
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…
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.
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.…
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…
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…
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…
