939 Datasheet by Adafruit Industries LLC

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USB MicroSD Card Reader/Writer -
microSD / microSDHC / microSDXC
PRODUCT ID: 939
Description
This is the cutest little microSD card reader/writer - but don't be fooled by its adorableness! It's wicked fast
and supports up to 64 GB SDXC cards! Simply slide the card into the edge and plug it into your computer.
No drivers are required, it shows up as a standard 'Mass Storage' device under any OS. You can swap cards
while the USB port is kept plugged in.
Comes with a handy little cord so you can attach it to your datalogger project. Also has a little plastic cover
for the USB A connector part so it won't short against nearby electronics.
Max read speed is 16 MB/sec, max write speed is 6 MB/sec - most microSD cards are not this fast so the
bottleneck will be the card, not the reader
Does not come with a microSD card! We do carry microSD cards in the shop that go great with the
reader.
Technical Details
Reader Specifications:
o Dimensions — 0.984" x 0.478" x 0.104" (24.99mm x 12.14mm x 2.64mm)
o Operating Temperature — 0° to 60° C / 32° to 140° F
o Storage temperatures — -40° to 85° C / -40° to 185° F
o Weight — 0.137 oz (3.8g)
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