Teardown: Chromecast for your inspection
Keywords:Chromecast? LED? micro USB? Micron? DDR3 SDRAM?
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I'm not lucky enough to own a set of iFixit's fancy dissection tools, but a thin flat head screwdriver applied to the gap between the case and the HDMI connector and twisted did the trick:
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Here's what you'll see when you remove the underside of the case:
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Further remove the system from the case topside, flip it over and more metal shielding awaits your eyes:
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In the above photo, I've also shown the reset button, which mates to the switch in the upper right corner. Below the switch, on the far right side, is the micro USB connector used solely (as far as I can tell) for Chromecast power purposes. The two patches of thermal paste mate the shielding to an aluminum heat sink:
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You might guess that those same two thermal paste patches correspond to the locations of heat-generating ICs on the PCB topside, and you'd be right:
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The paste-obscured chip in the center of the PCB is a Marvell DE3005-A1 SoC, which the company also refers to as the ARMADA 1500-mini. To its right is the equally paste-masked AzureWave AW-NH387, an IC that handles 802.11b/g/n Wi-Fi, Bluetooth and FM receiver functions (the latter feature isn't harnessed by Chromecast). And speaking of wireless, in the bottom right corner you can see the PCB-etched antenna.
Flip the PCB over, remove the other Faraday shield, and you can scan the Chromecast's memories:
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On the left, closest to the HDMI connector, is a Micron MT41K256M16 4 Gbit low-power DDR3 SDRAM. Its nonvolatile counterpart to the right is a Micron MT29F16G08 16 Gbit NAND flash memory.
I'm admittedly a bit bummed that my Chromecast has expired (and speaking of bits, if I had to hazard a guess, I'd suspect that at least one of them has unintentionally flipped in the flash memory-stored software), but at $25 for a refurbished replacement (and $32 and change brand new), I'm not going to sweat the issue. Google likely priced Chromecast to best-case break even, with an expectation of making subsequent profits on streamed-content rentals and sales.
So what's the result of crossing streams? Try to imagine all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light.
About the author
Brian Dipert is Editor-in-Chief of the Embedded Vision Alliance. He is also a Senior Analyst at BDTI and Editor-in-Chief of InsideDSP, the company's online newsletter. And he's an off-hours freelancer as the Principal at Sierra Media, where he contributes to (among other things) the Brian's Brain blog at EDN Magazine. Brian has a BSEE from Purdue University in West Lafayette, IN.
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