Infineon Technologies PEB2047-16NMTSL

Overview

PEB2047-16NMTSL from Siemens AG is a non-blocking CMOS memory time switch large (MTSL) IC for PCM telecommunication systems, supporting 4096-, 8192-, or 16 384-kHz device clocks, 16 input/8 output PCM lines, and per-time-slot programmable constant or minimal channel delay. It enables tristate expansion, built-in self-test, and µP read-access to PCM data in Motorola or Intel bus modes.

For engineers reviewing the PEB2047-16NMTSL datasheet, PEB2047-16NMTSL pinout, PEB2047-16NMTSL application, or PEB2047-16NMTSL equivalent, key selection criteria include frame-synchronized PCM switching capability, open-drain INT output timing, 5 V single-supply operation, and support for 1024×1024 channel routing in TDM infrastructure.

Technical Context

The PEB2047-16NMTSL implements a fully programmable time/space switch architecture optimized for synchronous digital telephony. It accepts up to 16 PCM inputs (including frame sync inputs FS0–FS7) and routes time slots to 8 tristatable PCM outputs with individually adjustable line delays and half-clock-step clock shift resolution.

Its register set includes Mode (MOD), Command (CMDR), Status (STAR), Interrupt Status (ISTA), Mask (MASK), and Indirect Access (IAR) registers - enabling real-time frame evaluation, indirect memory access, and in-operation bit-sampling adjustment without bit errors.

Key Specifications

Pinout & Package

LCC-44 (Plastic Leaded Chip Carrier, SMD), 44-pin, square body, gull-wing leads. Pin 1 marked by corner cut or dot; top view orientation per datasheet Figure 6.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar time-slot switching applications.

Compared with PEF2047-16NMTSL and MT8985D, the PEB2047-16NMTSL uniquely supports 16 384-kHz operation, FSx frame evaluation, and half-clock-step sampling adjustment - making it the sole option for jitter-critical, multi-rate PCM infrastructure requiring deterministic delay.

Availability

PEB2047-16NMTSL is available at Aetrix Electronics and suitable for digital telephony exchanges, PCM multiplexers, tandem switching nodes, and signaling link concentrators requiring stable component supply and long-term obsolescence management.

Supply support for PEB2047-16NMTSL 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 developed this IC in the mid-1990s as part of its telecommunication-specific analog and mixed-signal portfolio, later spun off into Infineon Technologies.

The MTSL product line targets time-division multiplexing infrastructure, delivering deterministic delay, frame-synchronized switching, and µP-configurable routing for E1/T1 and higher-density PCM systems.

FAQ

What clock frequencies does the PEB2047-16NMTSL support?

The PEB2047-16NMTSL supports three device clock frequencies: 4096 kHz, 8192 kHz, and 16 384 kHz. These correspond to standard PCM frame rates for E1 (2.048 Mbps), double-rate E1, and quad-rate E1 systems. The clock is applied to pin 44 (CLK), and the selected frequency determines internal timing resolution and maximum channel count.

How is frame synchronization achieved on the PEB2047-16NMTSL?

Frame synchronization uses the SP (Synchronization Pulse) input (pin 3) to align internal timing to the external PCM frame boundary. Additionally, pins IN8–IN15 serve as frame sync inputs (FS0–FS7), enabling measurement of frame arrival timing across multiple inputs. This dual mechanism ensures deterministic delay and supports multi-chip frame alignment in distributed switching systems.

Does the PEB2047-16NMTSL support both Intel and Motorola microprocessor interfaces?

Yes - the PEB2047-16NMTSL supports both 8-bit Intel-type (multiplexed AD0–AD7 with ALE) and Motorola-type (separate address/data with DS/RD/WR) bus protocols. Configuration is done via the Mode Register (MOD). Pin ALE (pin 2) must be tied to VSS in Intel demux mode or VDD in Motorola demux mode, per datasheet section 1.1.

What is the function of the open-drain INT pin (pin 6)?

Pin 6 is an active-low open-drain interrupt output that signals status events such as frame completion, register access completion, or error conditions. It requires an external pull-up resistor (typically 4.7 kΩ to VDD). The interrupt source is configurable via the MASK register, and status is readable in the ISTA register - enabling efficient polling or interrupt-driven host control.