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Switching Mainboard

Assembly

Overview

The switching mainboard is the printed-circuit assembly that does the actual packet work. It hosts the data-plane switching ASIC, the control-plane processor, the memory and lookup resources, and the copper PHYs that drive the front-panel ports.

Construction

A 12-layer Bare PCB provides the controlled-impedance routing that high-speed serial lanes demand. The switching fabric is delivered by a Compute SoC Module sitting at the board's center, surrounded by Ethernet PHY transceivers, six octal devices feeding the 48 access ports. The Control-Plane CPU runs the operating system and routing stack, backed by DDR4 DRAM DRAM and a NAND Flash device holding the boot loader and firmware. Line-rate access-control and route lookups run through dedicated TCAM memory. A Clock Generator supplies the low-jitter reference the serial links need, and extruded Heatsink blocks pull heat off the ASIC and CPU into the forced-air stream.

Switching Mainboard parts and their functions

10 top-level parts · 816 parts in total · full bill of materials below
Switching Mainboard parts diagram: 1 bare PCB, 2 compute SoC module, 3 control-plane CPU, 4 DDR4 DRAM, 5 NAND flash, 6 TCAM, 7 ethernet PHY, 8 clock generator, 9 heatsink, 10 SMD passive (R/C/L). 816 parts in 10 top-level items.
Switching Mainboard parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Bare PCB 1× 12-layer mainboard PCB
2 Compute SoC Module 1× Switching ASIC / fabric
3 Control-Plane CPU 1× Control-plane CPU
4 DDR4 DRAM 2× DDR4 control-plane DRAM
5 NAND Flash 1× NAND boot/firmware
6 TCAM 1× ACL/route lookup TCAM
7 Ethernet PHY 6× Octal Gigabit PHY transceivers
8 Clock Generator 1× Reference clock generator
9 Heatsink 2× ASIC + CPU heatsinks
10 SMD Passive (R/C/L) 800× Decoupling and bias

3D model

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Build & assembly graph

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Bill of materials for Switching Mainboard

10 top-level lines · 10 rows shown · 816 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Bare PCB pcb-bare 1× 1 · part
2 Compute SoC Module soc-module 1× 1 · part
3 Control-Plane CPU network-switch-cpu 1× 1 · part
4 DDR4 DRAM network-switch-ram 2× 2 · part
5 NAND Flash network-switch-flash 1× 1 · part
6 TCAM network-switch-tcam 1× 1 · part
7 Ethernet PHY network-switch-phy 6× 6 · part
8 Clock Generator network-switch-clock-gen 1× 1 · part
9 Heatsink network-switch-heatsink 2× 2 · part
10 SMD Passive (R/C/L) smd-passives 800× 800 · part

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Where the switching mainboard is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Network Switch

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $1–$200. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳JLCPCB
jlcpcb.com ↗ 		Shenzhen, CN PCB fabrication 100 pcs 2–4 wks
🇨🇳PCBWay
pcbway.com ↗ 		Shenzhen, CN PCB fab & assembly 100 pcs 2–4 wks
🇨🇳Shennan Circuits
scc.com.cn ↗ 		Shenzhen, CN PCB manufacturer 100 pcs 2–4 wks
🇮🇳Shogini Technoarts
shogini.com ↗ 		Mumbai, IN PCB manufacturer 100 pcs 2–4 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 100 pcs 2–4 wks

162-word article