MT48LC64M4A2_99 Datasheet, PDF (75/77 Pages) Micron Technology – Synchronous DRAM 256Mb: x4, x8, x16 SDRAM

Package Dimensions
Figure 55: 54-Pin Plastic TSOP (400 mil)
PIN #1 ID
256Mb: x4, x8, x16 SDRAM
Package Dimensions
0.10
1.2 MAX
0.375 ±0.075 TYP
22.22 ±.08
0.80 TYP
(FOR REFERENCE
ONLY)
2X R 0.75
2X R 1.00
0.15
+0.03
-0.02
2X 0.71
2X 0.10
PLATED LEAD FINISH: 90% Sn, 10% Pb OR 100%Sn
PLASTIC PACKAGE MATERIAL: EPOXY NOVOLAC
PACKAGE WIDTH AND LENGTH DO NOT
INCLUDE MOLD PROTRUSION. ALLOWABLE
PROTRUSION IS 0.25 PER SIDE.
2.80
10.16 ±0.08
11.76 ±0.20
SEE DETAIL A
0.10
+0.10
-0.05
GAGE PLANE
0.25
0.50 ±0.10
0.80
Notes:
DETAIL A
1. All dimensions in millimeters.
2. Package width and length do not include mold protrusion; allowable mold protrusion is
0.25mm per side.
3. “2X” means the notch is present in two locations (both ends of the device).
PDF: 09005aef8091e6d1/Source: 09005aef8091e6a8
256MSDRAM_2.fm - Rev. L 10/07 EN
75
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