MC74LCX244_16 Datasheet, PDF (9/10 Pages) ON Semiconductor – Low-Voltage CMOS Octal Buffer

MC74LCX244
PACKAGE DIMENSIONS
D
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ PIN ONE REFERENCE
QFN20, 2.5x4.5 MM
CASE 485AA
ISSUE B
A
B
E
2X
0.15 C
2X
0.15 C
TOP VIEW
0.10 C
20X 0.08 C
(A3)
A1
SIDE VIEW
20X L 9
D2
e
11
12
A
C
SEATING
PLANE
e
E2
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ASME Y14.5M, 1994.
2. CONTROLLING DIMENSION: MILLIMETERS.
3. DIMENSIONS b APPLIES TO PLATED
TERMINAL AND IS MEASURED BETWEEN
0.25 AND 0.30 MM FROM TERMINAL.
4. COPLANARITY APPLIES TO THE EXPOSED
PAD AS WELL AS THE TERMINALS.
MILLIMETERS
DIM MIN MAX
A 0.80 1.00
A1 0.00 0.05
A3 0.20 REF
b 0.20 0.30
D
2.50 BSC
D2 0.85 1.15
E
4.50 BSC
E2 2.85 3.15
e
0.50 BSC
K 0.20 ---
L 0.35 0.45
20X b
0.10 C A B ²
0.05 C _{NOTE 3}
1 20
19 20X
K
BOTTOM VIEW
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