X9521 Datasheet, PDF (21/26 Pages) Xicor Inc. – Dual DCP, EEPROM Memory

X9521 – Preliminary Information
20-Bump Chip Scale Package (CSP B20)
Package Outline Drawing
a
Top View (Marking Side)
f
A4 A3 A2 A1
B4 B3 B2 B1
b
j
C4 C3 C2 C1
D4 D3 D2 D1
m
E4 E3 E2 E1
l
k
Bottom View (Bumped Side)
e
c
Side View
d
e
Side View
Package Dimensions
Package Width
Package Length
Package Height
Body Thickness
Ball Height
Ball Diameter
Ball Pitch – Width
Ball Pitch – Length
Ball to Edge Spacing – Width
Ball to Edge Spacing – Length
Symbol
a
b
c
d
e
f
j
k
l
m
Millimeters
Min Nominal Max
2.542 2.572 2.602
3.812 3.842 3.872
0.644 0.677 0.710
0.444 0.457 0.470
0.200 0.220 0.240
0.300 0.320 0.340
0.5
0.5
0.511 0.536 0.561
0.896 0.921 0.946
Inches
Min Nominal Max
Ball Matrix:
4
3
2
1
A RL2 RW2 Vcc NC
B NC RH2 NC NC
C WP NC NC NC
D SCL NC NC RH1
E SDA RL1 RW1 Vss
REV 1.1.9 1/30/03
www.xicor.com
Characteristics subject to change without notice. 21 of 26