Infineon Technologies PSB 21553 E V1.4-G

Overview

PSB 21553 E V1.4-G from Infineon is a VoIP System-on-Chip (SoC) integrating MIPS32 4Kc CPU, dual 10/100 Ethernet MAC+PHY, 3-port wire-speed switch, AFE with 100 mW speaker driver, and DSP supporting G.711/G.723.1/G.729A/B/G.722 codecs, acoustic echo cancellation, and DES/3DES/AES encryption - deployed in IP deskphones and conferencing terminals.

For engineers reviewing the PSB 21553 E V1.4-G datasheet, PSB 21553 E V1.4-G pinout, PSB 21553 E V1.4-G application, or PSB 21553 E V1.4-G equivalent, key selection criteria include integrated Ethernet switching capability, hands-free audio processing performance, VoIP codec support, security acceleration, and SDRAM interface timing compliance.

Technical Context

The device implements a tightly coupled subsystem architecture: a 100 MHz MIPS32 4Kc RISC CPU with separate 16 KB I-cache and 16 KB D-cache, MMU with 16-entry TLB, and 5-channel DMA controller interfaces directly to on-chip peripherals including DSP core, AFE, and Ethernet switch fabric.

Audio processing is handled by a dedicated DSP subsystem with integrated AFE featuring analog microphone input, stereo DAC output, 100 mW Class-D speaker driver, and real-time acoustic echo cancellation - all synchronized via shared memory (YRAM/PRAM/DROM) and mailbox-based inter-processor communication with the CPU.

Key Specifications

Pinout & Package

PSB 21553 E V1.4-G is housed in a P-LBGA-324-3 package (324-pin Low-Profile Ball Grid Array, 1.0 mm pitch, 17 mm × 17 mm body).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar VoIP SoC applications.

Compared with TI TMS320VC5509A+DP83848 and Conexant CX82300, PSB 21553 E V1.4-G delivers higher integration density, deterministic QoS switching, and hardware-accelerated AES - reducing design cycle time for carrier-grade IP telephony terminals.

Availability

PSB 21553 E V1.4-G is available at Aetrix Electronics and suitable for IP deskphones, VoIP conference terminals, and secure enterprise gateways requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PSB 21553 E V1.4-G 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 MCUs, and communications ICs - with global R&D centers and ISO 9001-certified wafer fabs.

The INCA-IP product line was designed specifically for single-chip VoIP terminal systems, targeting reduced bill-of-materials, minimized PCB footprint, and certified interoperability with SIP-based service providers and PBX platforms.

FAQ

What is the maximum SDRAM capacity supported by PSB 21553 E V1.4-G?

The PSB 21553 E V1.4-G SDRAM controller supports up to 64 MB of external SDRAM using standard x16 devices. It implements row/column addressing with programmable CAS latency (CL=2 or CL=3), burst length (1–4), and auto-refresh timing aligned to JEDEC JESD21-C specifications. No external address multiplexing logic is required.

Does PSB 21553 E V1.4-G support Power over Ethernet (PoE)?

PSB 21553 E V1.4-G does not integrate a PoE power sourcing equipment (PSE) or powered device (PD) interface. However, its Ethernet PHYs comply with IEEE 802.3af Class 0 detection signatures, allowing use with external PoE injectors or midspans. The chip's 1.8 V core and 3.3 V I/O rails are compatible with standard PoE-derived DC-DC converter outputs.

Can the integrated DSP handle custom voice algorithms beyond standard codecs?

No - the DSP core is a fixed-function hardware accelerator optimized for G.711/G.723.1/G.729A/B/G.722 encoding/decoding, AEC, and noise suppression. It does not support user-loaded firmware or programmable instruction sets. Custom audio processing requires an external programmable DSP such as TI C55xx or Analog Devices SHARC.

Is the RMII interface electrically compatible with common external PHYs like LAN8720?

Yes - PSB 21553 E V1.4-G RMII interface complies with IEEE 802.3u RMII specification (1.8 V CMOS levels, 50 Ω impedance control, 50 MHz reference clock). It has been validated with Microchip LAN8720A and Realtek RTL8201CP, supporting full-duplex 10/100 operation with automatic MDI/MDIX crossover.