Broadcom / TECHNICAL REFERENCE

BCM56990

Tomahawk4 Ethernet switching silicon; public specifications describe the BCM56990 base device.

FPGA.io Part Number FIO-993C6656888CD129Internal catalogue reference · manufacturer MPN remains unchanged

Technical reference · Base device — ordering suffix not specified · Checked 2026-09-28

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BCM56990 — technical feature overview — Technical schematicFPGA.io technical schematic for BCM56990. Values summarize the documented fields below; consult their source conditions. This is an abstract diagram, not a product photograph, package drawing or pinout. Parameter sources below ↓

DOCUMENTED FACTS

Technical parameters

4 source-linked fields

Values apply to the device and conditions identified in each source. Family maxima, package limits and full ordering-code specifications must not be treated as interchangeable.

Parameter	Documented value	Source & conditions
Single-chip switching bandwidth	Up to 25.6 Tb/s	Broadcom Tomahawk4 / BCM56990 ↗Overview and Features
Switching functions	L2 and L3 switching, routing and tunneling	Broadcom Tomahawk4 / BCM56990 ↗Overview and Features
Embedded processors	Four Arm processors at 1 GHz	Broadcom Tomahawk4 / BCM56990 ↗Overview and Features
Process technology	7 nm	Broadcom Tomahawk4 / BCM56990 ↗Overview and Features

Official documents

Broadcom Tomahawk4 / BCM56990Overview and FeaturesWeb ↗

Ordering and board constraints

This reference identifies a base device. Package, speed grade, temperature, qualification and packing suffixes have not been inferred.

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Series & categories

Ethernet switching →

COMPLETE PART IDENTITIES

Ordering numbers for BCM56990

0 documented codes

These references belong to this device. Evidence labels distinguish reviewed specifications, public listings and manufacturer coding examples. Counts describe this site’s documented coverage, not stock or all configurations offered by the manufacturer.

Exact ordering code requires confirmation

The cited public material did not establish a literal complete ordering row in this pass. This is an evidence limit, not a claim that no code exists. The existing device identity is retained; no suffix combinations, neighboring chips, boards or systems are substituted.

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