Infineon Technologies PEB2047NV2.1

Overview

PEB2047NV2.1 from Siemens AG is a non-blocking CMOS memory time switch large (MTSL) IC for PCM telecommunication systems, supporting 2048–16384 kbit/s data rates, 16 input/8 output PCM lines, and programmable per-slot channel delay with ±½-clock-step resolution. It operates on a single 5 V ±5 % supply and integrates µP interface (8-bit Motorola/Intel), built-in self-test, and tristate-capable output drivers for tandem expansion.

For engineers reviewing the PEB2047NV2.1 datasheet, PEB2047NV2.1 pinout, PEB2047NV2.1 application, or PEB2047NV2.1 equivalent, key selection criteria include frame-synchronized PCM switching capability, register-accessible delay calibration per input line, open-drain interrupt signaling, and LCC-44 surface-mount packaging compatible with legacy telecom timing architectures.

Technical Context

The PEB2047NV2.1 implements a time-space switch architecture optimized for constant-frame-delay operation in digital telephony infrastructure. It supports three device clock frequencies (4096/8192/16384 kHz), enables independent configuration of input and output modes, and provides individual line delay measurement for all eight PCM inputs via dedicated FSx pins.

Its µP interface operates in multiplexed (Intel/Motorola) or demultiplexed mode, with address/data bus sharing (AD0–AD7), chip-select (CS), read/write control (R/W or WR/RD), and address latch enable (ALE). The INT pin delivers active-low open-drain interrupt signals synchronized to frame boundaries.

Key Specifications

Pinout & Package

P-LCC-44 surface-mount package with 44 gull-wing leads; body size 16.6 mm × 16.6 mm, lead pitch 0.8 mm, JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar memory time switch applications.

Compared with PEF2047-N-16 and PEB2047-16, the PEB2047NV2.1 offers identical switching architecture and µP interface but excludes 16384-kHz clock mode activation-making it suitable for cost-optimized E1/T1 systems where maximum clock rate is not required.

Availability

PEB2047NV2.1 is available at Aetrix Electronics and suitable for digital line card switching, E1/T1 multiplexer timing control, tandem digital cross-connect systems, and legacy PBX time-slot reassignment requiring stable component supply and long-term obsolescence management.

Supply support for PEB2047NV2.1 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 before spinning off its chip business in 1999.

The PEB2047NV2.1 belongs to Siemens' MTSL (Memory Time Switch Large) product line, designed specifically for non-blocking PCM time-slot interchange in digital telephony infrastructure including central office switches and remote line concentrators.

FAQ

What µP bus protocols does the PEB2047NV2.1 support?

The PEB2047NV2.1 supports both Intel-type (with ALE, RD, WR) and Motorola-type (with DS, R/W) 8-bit parallel microprocessor interfaces. Configuration is determined by external wiring: ALE tied to VSS for Intel demultiplexed mode, or to VDD for Motorola demultiplexed mode. Multiplexed operation uses AD0–AD7 for both address and data.

Does the PEB2047NV2.1 support 16384-kHz operation?

No-the PEB2047NV2.1 supports device clock frequencies of 4096 kHz and 8192 kHz only. Full 16384-kHz capability is exclusive to the PEB2047-16 variant, as confirmed in the "Important Note" on page 6 of the 03.95 datasheet. Using PEB2047NV2.1 at 16384 kHz violates absolute maximum ratings and may cause functional failure.

How is frame synchronization implemented on the PEB2047NV2.1?

Frame synchronization is achieved via the SP (Synchronization Pulse) input (Pin 3) and eight configurable FSx inputs mapped to IN8–IN15. These allow real-time frame boundary detection on selected PCM inputs. The STAR register (Status Register) provides flags indicating frame alignment status and error conditions for each monitored line.

What is the function of the INT pin, and how should it be interfaced?

Pin 6 (INT) is an active-low open-drain interrupt output. It asserts when internal events occur-such as completion of indirect register access or frame boundary detection-and requires an external pull-up resistor (typically 4.7 kΩ to VDD) to generate a valid logic-high level. Multiple PEB2047 devices can share a single interrupt line via wired-OR connection.