Infineon Technologies PEF 24471 E V1.3

Overview

PEF 24471 E V1.3 from Infineon Technologies is a high-density, multi-protocol switching IC designed for H.1x0 and PCM-based wired communications infrastructure. It integrates a programmable switching fabric with dual-clock domain support (H-Bus up to 8.192 MHz and PCM up to 2.048 MHz), on-chip PLL with jitter-transfer optimization, and configurable 1-/2-/4-/8-bit subchannel switching modes. Used in carrier-grade PBX, VoIP gateways, and remote access servers for time-slot interconnection between TDM streams.

For engineers reviewing the PEF 24471 E V1.3 datasheet, PEF 24471 E V1.3 pinout, PEF 24471 E V1.3 application, or PEF 24471 E V1.3 equivalent, this device requires attention to H-Bus/PCM timing alignment, indirect register configuration via µP interface, interrupt-driven connection management, and hardware reset synchronization across clock domains.

Technical Context

The PEF 24471 E V1.3 implements a fully programmable switching factory supporting bidirectional, broadcast, multipoint, and stream-to-stream TDM channel mapping with subchannel granularity down to 1 bit. Its architecture includes two independent clocking units: an Analog PLL (APLL) for H-Bus synchronization and a dedicated PCM clock generator with frame-group outputs.

It features dual microprocessor interfaces (Intel/Siemens or Motorola mode, 8-/16-bit), JTAG boundary-scan compliance, and a 32-pin general-purpose port (GPIO) with configurable direction per pin. Configuration is performed via indirect register addressing using CMD1/CMD2 registers, and error handling relies on ISTA1, IESTA1/IESTA2, and INTEM2 status/mask registers.

Key Specifications

Pinout & Package

PEF 24471 E V1.3 is housed in a 256-pin plastic quad flat package (PQFP) with 0.5 mm pitch, thermally enhanced for sustained TDM switching operation. Pin functions are grouped into six interface domains: H-Bus (16-bit bidirectional data + control), PCM local bus (8-/16-bit parallel or serial), microprocessor interface (8-/16-bit address/data multiplexed or demultiplexed), JTAG (TCK/TMS/TDI/TDO/TRST), GPIO (32 pins, individually configurable), and dual power/ground sets for analog/digital isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar TDM switching applications.

Compared with PEF 20471 HTSI-L, the PEF 24471 E V1.3 adds broadcast/multipoint switching and full 1-bit granularity-enabling VoIP gateway architectures-while the HTSI-XL variant trades no functionality for higher thermal/ESD robustness, making it suitable for harsher deployment environments without firmware changes.

Availability

PEF 24471 E V1.3 is available at Aetrix Electronics and suitable for carrier-grade PBX systems, VoIP gateways, ISDN remote access servers, and computer telephony integration platforms requiring stable component supply across multi-year production cycles.

Supply support for PEF 24471 E V1.3 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, and wired/wireless communications ICs, with global R&D and manufacturing facilities.

The PEF 24471 E V1.3 belongs to Infineon's SWITI (Switching IC) product line, engineered specifically for carrier-class TDM infrastructure requiring deterministic, low-latency time-slot interconnection across heterogeneous clock domains.

FAQ

What clock sources does the PEF 24471 E V1.3 support for H-Bus and PCM interfaces?

The device supports independent clock inputs: H-Bus uses an external 8.192 MHz reference fed into the APLL for jitter cleanup, while PCM accepts either an external 2.048 MHz source or derives it internally from the APLL output via programmable dividers. Both domains maintain phase alignment through dedicated hardware logic described in Chapter 3.4.4 of the datasheet.

How is subchannel switching configured-via hardware pins or software registers?

Subchannel switching mode (1-/2-/4-/8-bit) is configured exclusively through software-accessible registers: CMD1 and CMD2 define the connection type, while the Connection Address Register (CAR) specifies source/destination time-slot and bit-width. No hardware pin strapping is used-full flexibility is achieved via µP interface writes during initialization or runtime.

Does the PEF 24471 E V1.3 include built-in memory for connection tables?

Yes-it contains 256 bytes of on-chip configuration RAM accessible via indirect addressing, storing active connection descriptors, interrupt masks, and timing parameters. This eliminates external memory requirements for basic switching configurations and enables fast context switching between up to 32 concurrent connections.

Can the GPIO pins be used for real-time status monitoring during switching operations?

Yes-each of the 32 GPIO pins can be individually configured as input or output and mapped to internal events (e.g., connection established, error detected, PLL locked) via the General Purpose Port Control Register (GPPCR). This allows hardware-level signaling to external FPGAs or microcontrollers without CPU intervention.