Today we’ll be taking a look at a router, the SMC Networks ADSL2/2+ Barricade G Wireless Modem/Router (SMC7901WBEA2 B1) which is a 1 LAN Port Wireless ADSL2Modem/Router in a small form factor compared to other routers but that’s mostly due to it having only 1 LAN port.
Four screws later, the top pops out and we’re in.
We’ve got 3 main chips plus the Wifi chip shielded with a fair bit of capacitors, 4x 16V 1000uF KMG branded caps near the input and we have 2x AP1534 and 1x AP34063 DC-DC converters, the inductors aren’t glued down at all. Interestingly there may have been the possibility to shield the SDRAM and one side of the SoC too, I guess it wasn’t needed. We have a u.FL connector going to the antenna. PCB date code is 46th week of 2009.
Realtek ADSL2+ SoC
Features a 200MHz clock, 10/100Mbps Ethernet PHY, PCI, USB PHY, SPI, etc.
Can be combined with the RTL8271B for the front end which we do see.
RTL8671BH
Realtek ADSL2+ Analog Front End
Running with a 17MHz crystal
RTL8271B
Winbond 128Mbit SDRAM
W9812G6IH
EON 32Mbit Flash
EN25F32-100HIP
Realtek 802.11b/g Wifi
RTL8187
Underneath the shield, we have the RTL8187SU Wifi chip running with a 40Mhz crystal.
And that’s all.
