Manufacturer: MICRON
Order Code: 1216281
Manufacturer Part No: MT48LC16M16A2P-7E:D
Description: SDRAM 256MB, SMD, 48LC16, TSOP54
Supplier: http://nl.farnell.com/micron/mt48lc16m16a2p-7e-d/sdram-256mb-smd-48lc16-tsop54/dp/1216281
Datasheet: http://www.farnell.com/datasheets/119914.pdf
Datasheet: http://download.micron.com/pdf/datasheets/dram/sdram/256MSDRAM.pdf
Catalogue Page: 99 / EBU
Price: € 12,59

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http://download.micron.com/pdf/datasheets/dram/sdram/256MSDRAM.pdf
# page 75 of datasheet
# how is the size of the footprint pad calculated? they do fit but have
# very little space left for solder...

# MT48LC16M16A2P-7E:D
# Memory size: 256Mbit
# MT48LC16M16A2 – 4 Meg x 16 x 4 banks

http://www.micron.com/products/partdetail?part=MT48LC16M16A2P-7E
http://www.micron.com/products/dram/sdram/technotes

reasoning:
- 256Mb = 32MB x 2 = 64MB
- good documentation available
- part is available for purchase
- part is affordable
- LPC3180 has 32bit databus, two of these parts may be used parallel

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footprint:
TSOP-65P-640L1-54N__MICRON_MT48LC16M16A2P-7E.fp
54-pin TSOP II (400 mil)

TSSOP   pin spacing, lead span 1, pin count

P  pin spacing        dimension
L1 lead span 1        dimension
N  pin count          count