Infineon Technologies PEB2091NV5.2

Overview

PEB2091NV5.2 from Siemens AG is an ISDN echo cancellation circuit compliant with IEC-Q standards, implementing full-duplex U-interface signal processing for NT/TE repeater and wireless local loop base station applications. It supports IOM®-2 serial interface (8.192 MHz master clock), features undervoltage detection (UVDET at 4.5 V ±0.15 V), consumes ≤120 mW typical at 5 V, and operates across –40°C to +85°C industrial temperature range.

For engineers reviewing the PEB2091NV5.2 datasheet, PEB2091NV5.2 pinout, PEB2091NV5.2 application, or PEB2091NV5.2 equivalent, this device serves as a dedicated ISDN physical layer controller with integrated S/G bit state management, µP bus interface (Siemens/Intel & Motorola modes), and configurable wake-up signaling in LT repeater mode.

Technical Context

The PEB2091NV5.2 implements a dual-mode ISDN physical layer controller supporting both NT (Network Termination) and TE (Terminal Equipment) roles via programmable mode selection pins. Its architecture integrates an IOM®-2 interface with jitter-reduced clock generation (CLS output), a U-interface transceiver with selectable S/G bit polarity, and hardware-level undervoltage reset (RST assertion at 4.5 V).

It provides two operational configurations: Standalone mode using dedicated control pins (e.g., DIN, DOUT, SG, CLS), and Microprocessor mode with 8-bit parallel data bus, address lines A0–A2, and control signals RD, WR, CS. Register-based configuration (ADF, ADF2, CIWU) enables dynamic activation, superframe marker enable, and monitor channel filtering.

Key Specifications

Pinout & Package

PEB2091NV5.2 is available in three surface-mount packages: P-LCC-44 (plastic leaded chip carrier), M-QFP-64 (metric quad flat pack), and T-QFP-64 (thin quad flat pack). Pin functions are identical across packages; pin numbering follows top-view layout per Figure 1 (M/T-QFP-64) and Figure 24 (P-LCC-44) in the original delta sheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN physical layer controller applications.

Compared with PEF2091V5.3 and PSB21910V5.2, PEB2091NV5.2 delivers certified IEC-Q reliability, built-in UVDET with hysteresis, and lower jitter-making it optimal for new industrial-grade ISDN infrastructure requiring zero external reset components and tight timing margins.

Availability

PEB2091NV5.2 is available at Aetrix Electronics and suitable for ISDN repeater systems, wireless local loop base stations, dual-mode PC card adapters, and NT-auto activation terminals requiring stable component supply across extended product lifecycles.

Supply support for PEB2091NV5.2 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 communications, automotive, and industrial ICs before its semiconductor division was spun off in 1999.

PEB2091NV5.2 belongs to the IEC-Q-certified ISDN physical layer controller product line, designed specifically for carrier-class U-interface repeaters, wireless local loop infrastructure, and dual-mode terminal equipment meeting stringent ETSI and ITU-T requirements.

FAQ

What is the purpose of the SG pin on PEB2091NV5.2?

The SG pin is an open-drain output that reflects the current state of the S/G (Separation/Guard) bit defined in ITU-T I.430 for U-interface framing. It indicates whether the device is operating in separation mode (SG = high) or guard mode (SG = low), enabling external logic to synchronize with U-frame boundaries. Its status is updated synchronously with CLS and can be inverted via register ADF:CBAC.

Does PEB2091NV5.2 support both Siemens/Intel and Motorola microprocessor bus timing?

Yes, PEB2091NV5.2 supports both bus protocols through internal timing configuration. The mode is selected via pin MODE[1:0] and controlled by register bits SWST:BS and SWST:SGL. Timing parameters-including setup/hold times for RD/WR and address latch enable-are fully specified for both architectures in Sections 5.3.1.1 and 5.3.1.2 of the delta sheet, with no external glue logic required.

How does the undervoltage detection (UVD) function operate in PEB2091NV5.2?

UVD monitors VDD and asserts active-low RST when voltage falls below 4.5 V ±0.15 V. A Schmitt trigger with 150 mV hysteresis ensures clean release once VDD rises above 4.65 V, preventing oscillation during slow power ramp-up. This function is always enabled and requires no register configuration, providing fail-safe reset behavior independent of firmware state.

Can PEB2091NV5.2 be used in wireless local loop (WLL) base station designs?

Yes, PEB2091NV5.2 is explicitly validated for WLL base station use per Section 1.5.2 and Figure 3 of the delta sheet. It provides the U-interface physical layer interface, IOM®-2 framing, and activation signaling required to terminate multiple ISDN subscriber lines and interface with RF modems. Its constant propagation delay characteristic (Section 3.8) ensures predictable timing in radio-over-copper architectures.