Microchip Technology KSZ8382L

Overview

KSZ8382L from Microchip (acquired Micrel) is a VoIP System-on-Chip integrating a 166MHz MIPS32 4KEc CPU, 125MHz ZSP400 DSP, dual 10/100 Base-T MAC/PHY with IEEE 802.3az Energy Efficient Ethernet, and a 3-port switch - enabling IP phone endpoints with HD wideband voice (G.722.2, G.711.1), echo cancellation (G.167, 128ms tail), and SIP/RTP stack support.

For engineers reviewing the KSZ8382L datasheet, KSZ8382L pinout, KSZ8382L application, or KSZ8382L equivalent, key selection considerations include integrated EEE-compliant Ethernet switching, dual-channel telephony processing, DDR2/SDRAM memory controller support, and firmware-accessible DSP resources for custom media transport or call control.

Technical Context

The KSZ8382L implements a multiprocessor architecture with tightly coupled MIPS32 CPU and ZSP400 DSP cores, enabling concurrent SIP signaling (RFC 3261–3264), RTP/RTCP packetization (RFC 3550/3551), and real-time wideband voice processing including G.722.2 decoding and adaptive jitter buffering.

Its integrated 3-port Ethernet switch supports IEEE 802.1p QoS, 802.1Q VLANs, and IGMP v1/v2 snooping, while on-chip power management delivers sub-1W standby per EU Ecodesign Directive 2005/32/EC via hardware-accelerated EEE operation.

Key Specifications

Pinout & Package

KSZ8382L is housed in a 256-pin LFBGA package (15 mm × 15 mm, 0.8 mm pitch) with dedicated ball assignments for DDR2 SDRAM interface (32-bit data, 13-bit address), three Ethernet PHY interfaces (MDI pairs + MII/RMII), and dual audio codec I/O (I²S, PCM, DAC/ADC lines).

Key Features

Applications

Equivalent & Alternatives

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

Compared with KSZ8382Q and KSZ8381, the KSZ8382L uniquely delivers full wideband voice capability plus hardware-accelerated EEE - making it the sole option for new IP phone designs requiring both HD audio and sub-1W standby compliance.

Availability

KSZ8382L is available at Aetrix Electronics and suitable for IP phones, emergency intercom systems, cloud kiosks, and door access terminals requiring stable component supply across multi-year production cycles.

Supply support for KSZ8382L 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

Microchip Technology acquired Micrel in 2015 and maintains full support for the KSZ8382 family, providing validated reference designs, Linux BSPs, and SIP firmware stacks.

The KSZ8382L belongs to Micrel's VoIP SoC product line, engineered specifically for single-chip IP telephony endpoints demanding integrated processing, switching, wideband voice, and regulatory-compliant power efficiency.

FAQ

What is the primary function of the KSZ8382L in an IP phone design?

The KSZ8382L serves as the central VoIP SoC in IP phone designs, integrating CPU, DSP, dual 10/100 Ethernet MAC/PHY, 3-port switch, memory controllers, and audio subsystems. It executes SIP signaling, processes wideband voice codecs (G.722.2), performs echo cancellation, and manages Ethernet traffic - eliminating the need for multiple discrete ICs in the KSZ8382L-based system architecture.

Does the KSZ8382L support Energy Efficient Ethernet (EEE) and what is its compliance status?

Yes, the KSZ8382L implements hardware-accelerated IEEE 802.3az Energy Efficient Ethernet and is certified compliant with EU Ecodesign Directive 2005/32/EC for standby power - delivering <1W system-level standby consumption. This EEE capability is built into the KSZ8382L's Ethernet MAC/PHY and requires no external power management IC or firmware polling.

Which voice codecs are natively supported by the KSZ8382L DSP?

The KSZ8382L's ZSP400 DSP natively supports G.711, G.722.2, G.729A/B, iLBC, G.723, G.726, and G.711.1 wideband codecs, along with G.167 echo cancellation (128ms tail), VAD, CNG, PLC, and adaptive jitter buffering. All codec operations run in real time on the KSZ8382L without host CPU intervention.

Can the KSZ8382L boot directly from serial NOR flash, and what interface modes does it support?

Yes, the KSZ8382L supports direct boot from serial NOR flash using single, dual, or quad SPI interfaces - with quad-SPI enabling faster boot times and reduced firmware load latency. The KSZ8382L's SSP controller handles all timing and command sequences autonomously, allowing the KSZ8382L to initialize and begin executing code without external boot ROM or FPGA assistance.

How does the KSZ8382L handle security for SIP and RTP traffic?

The KSZ8382L integrates dedicated hardware engines for SIP TLS (signaling encryption) and SRTP (AES-128 media encryption per RFC 3711), enabling end-to-end security without CPU overhead. STUN support allows NAT traversal, and all security functions operate within the KSZ8382L's trusted execution environment - ensuring that KSZ8382L-based devices meet HIPAA and GDPR-compliant voice transmission requirements.