Datenblatt für SN54LVC74A, SN74LVC74A von Texas Instruments
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INVERTING AND NDNINVERTING OUTPUTS
Low-AND HIGH-LEVEL ENABLING
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MECHANICAL DATA
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MECHANICAL DATA
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INSI'RUMENT‘S
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THERMAL PAD MECHANICAL DATA
RGY (87PVQFN7N14) PLASTlC QUAD FLATPACK NOiLEAD
THERMAL lNFORMATlON
This package incorporates an exposed thermal pad that is designed to be attached directly to an external
heatsink. The thermal pad must be soldered directly to the printed circuit board (PCB). After soldering, the
PCB can be used as a heatsink. In addition, through the use of thermal vias, the thermal pad can be attached
directly to the appropriate copper plane shown in the electrical Schematic for the device, or alternatively, can be
attached to a special heatsink structure designed into the PCB, This design optimizes the heat transfer from the
integrated circuit (IC).
For iniormatlon on the Quad Flatpack No—Lead (QFN) package and its advantages. reier to Application Report.
OFN/SON PCB Attachment. Texas instruments Literature No. SLUA271. This document is available at wwwti‘cam,
The exposed thermal pad dimensions for this package are shown in the following illustration.
—Exposed Thermal Pad
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Exposed Thermal Pad Dimensions
4206353—2/P 03/14
NOTE: All linear dimensions are in millimeters
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LAND PATTERN DATA
PLASTIC QUAD FLATPACK NO—LEAD
RGY (s—PVQFN—Ni 4)
Example Stencil Design
0‘125mm stencil ihichness
Example Eaard Lawut (Note E)
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Customers should
Laser cutting apertures with trapezoidal walls and also rounding carriers will orler better paste release.
Reler to we 7525 tor stencil design considerations.
contact their board ossemoly site tar stencil design recommendations,
Customers should contact their board fabrication site for minimum solder mask wea tolerances between signal pods.
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MECHANICAL DATA
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INSTRUMEN'IS
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GENERIC PACKAGE VIEW
J 14 CDIP - 5.08 mm max heigm
CERAMIC DUAL IN LINE PACKAGE
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Images above are jusl a represenlalion of the package family, aclual package may vary
Refel lo the produd dala sheel for package details.
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MECHANICAL DATA
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nter‘ec: flash sfu‘ not exceed 0017 (043) each swde
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LAND PATTERN DATA
D (R7PDSOmGl4) PLASTlC SMALL OUTLINE
Example Board Layout Sterlazlogpeulyngs
(Mole c)
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Example
Non Soldermask Delined Pad Example
Pad Geometry
(See Note c)
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Example
l / Solder Mask Opening
7 0 07 f (See Note E)
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NOTES: A. All linear dimensions are in millimeters.
a, Tnis drawan is subject to cnonae wl'lhuul notice.
c. Publlcutl’on chs7351 is recommended tor alternate desl’gns.
D. Laser ctming apertures w‘lth trapezoidal walls and also roundlng comers wlll otter better paste release. Customers should
contact their board assembly site for stencil design recommendations, Reter tc ch—7525 lor otner stencil recommendations.
E. Customers snoola contact their ooard looricotion site lor solder musk tolerances between ond oroond signol oods.
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MECHANICAL DATA
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LAND PATTERN DATA
PLASTHC SMALL OUTLINE
Example Board Layout
(Male 0)
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MECHANICAL DATA
W (R—GDFP—F14) CERAM‘C DUAL FLATPACK
Ease and Seating Wane
0.250 (6.60)
00‘5 (W) 0235 (5.97)
f 0. 026 (0 as)
‘ ‘ 0.005 0.20
_ 00 2.03) 0.004 (0.10)
0,045 1.14
47 0,280 (7.11) MAX 4»
0.019 0.48
1 H i 0.015 50.35;
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:I I: 0.050 (1.27)
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0.390 (9 91)
7' I: :1
0.335 (0.51) :l I:
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0.560 (9.11) 0.360 (0.14)
0.250 (0.35) 0,250 (6.35)
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NOTES: A. AH Hnear dimensions are in inches (m1111meters).
B. This dram’ng 1: 5mm \0 change mm nofice.
c, This package can be hermeticany sea1ed mm 0 ceramic lid usmg glass iriL
0, \ndex paint '15 pmw'ded an cap for terminm idenmcutiun omy.
E. Faus within M1L STD 1835 GDFPW’FH
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