W24257S-70LL-TR Datasheet, PDF (9/10 Pages) Winbond – 32K × 8 CMOS STATIC RAM

W24257
PACKAGE DIMENSIONS
28-pin SO Wide Body
28
15
e1
E HE
L
Detail F
1
14
b
D
A2 A
S
e
y
A1
Seating Plane
e1
c
LE
See Detail F
Symbol
A
A1
A2
b
c
D
E
e
HE
L
LE
S
y
θ
Dimension in Inches Dimension in mm
Min. Nom. Max. Min. Nom. Max.
0.112
2.85
0.004
0.10
0.093 0.098 0.103 2.36 2.49 2.62
0.014 0.016 0.020 0.36 0.41 0.51
0.008 0.010 0.014 0.20 0.25 0.36
0.713 0.733
18.11 18.62
0.326 0.331 0.336 8.28
0.044 0.050 0.056 1.12
8.41
1.27
8.53
1.42
0.453 0.465 0.477 11.51 11.81 12.12
0.028 0.036 0.044 0.71 0.91 1.12
0.059 0.067 0.075 1.50 1.70 1.91
0.047
1.19
0.004
0.10
0
10
0
10
Notes:
1. Dimension D Max. & S include mold flash
or tie bar burrs.
2. Dimension b does not include dambar
protrusion/intrusion.
3. Dimension D & E inc. lude mold mismatch
and determined at the mold parting line.
4. Controlling dimension: Inches.
5. General appearance spec should be based
on final visual inspection spec.
28-pin Standard Type One TSOP
HD
D
1
e
b
θ
L
L1
c
E
A2 A
A1
Y
Dimension In Inches Dimension In mm
Symbol
Min. Nom. Max. Min. Nom. Max.
A
A1
A2
b
c
D
E
HD
e
L
L1
Y
θ
0.047
1.20
0.002
0.006 0.05
0.15
0.035 0.040 0.041
0.007 0.008 0.011
0.004 0.006 0.008
0.461 0.465 0.469
0.311 0.315 0.319
0.95
0.17
0.10
11.70
7.90
1.00 1.05
0.20 0.27
0.15 0.21
11.80 11.90
8.00 8.10
0.520
0.020
0.528 0.536
0.022
0.024 0.028
0.010
13.20
0.50
13.40
0.55
0.60
0.25
13.60
0.70
0.000
0.004 0.00
0.10
0
3
5
0
3
5
Controlling dimension: Millimeters
Publication Release Date: May 2000
-9-
Revision A14