HS-1840ARH, HS-1840BRH
7
FN4355.3
September 14, 2010
Ceramic Metal Seal Flatpack Packages (Flatpack)
NOTES:
1. Index area: A notch or a pin one identification mark shall be located
adjacent to pin one and shall be located within the shaded area
shown. The manufacturer’s identification shall not be used as a pin
one identification mark. Alternately, a tab (dimension k) may be
used to identify pin one.
2. If a pin one identification mark is used in addition to a tab, the limits
of dimension k do not apply.
3. This dimension allows for off-center lid, meniscus, and glass over-
run.
4. Dimensions b1 and c1 apply to lead base metal only. Dimension M
applies to lead plating and finish thickness. The maximum limits of
lead dimensions b and c or M shall be measured at the centroid of
the finished lead surfaces, when solder dip or tin plate lead finish is
applied.
5. N is the maximum number of terminal positions.
6. Measure dimension S1 at all four corners.
7. For bottom-brazed lead packages, no organic or polymeric materi-
als shall be molded to the bottom of the package to cover the leads.
8. Dimension Q shall be measured at the point of exit (beyond the me-
niscus) of the lead from the body. Dimension Q minimum shall be
reduced by 0.0015 inch (0.038mm) maximum when solder dip lead
finish is applied.
9. Dimensioning and tolerancing per ANSI Y14.5M - 1982.
10. Controlling dimension: INCH.
-D-
-C-
0.004 H A - B
M
D
S S
-A- -B-
0.036 H A - B
M
D
S S
e
E
A
Q
L
D
A
E1
SEATING AND
LE2
E3 E3
BASE PLANE
-H-
b
C
S1
M
c1
b1
(c)
(b)
SECTION A-A
BASE
LEAD FINISH
METAL
PIN NO. 1
ID AREA
A
M
K28.A MIL-STD-1835 CDFP3-F28 (F-11A, CONFIGURATION B)
28 LEAD CERAMIC METAL SEAL FLATPACK PACKAGE
SYMBOL
INCHES MILLIMETERS
NOTESMIN MAX MIN MAX
A 0.045 0.115 1.14 2.92 -
b 0.015 0.022 0.38 0.56 -
b1 0.015 0.019 0.38 0.48 -
c 0.004 0.009 0.10 0.23 -
c1 0.004 0.006 0.10 0.15 -
D - 0.740 - 18.80 3
E 0.460 0.520 11.68 13.21 -
E1 - 0.550 - 13.97 3
E2 0.180 - 4.57 - -
E3 0.030 - 0.76 - 7
e 0.050 BSC 1.27 BSC -
k 0.008 0.015 0.20 0.38 2
L 0.250 0.370 6.35 9.40 -
Q 0.026 0.045 0.66 1.14 8
S1 0.00 - 0.00 - 6
M - 0.0015 - 0.04 -
N28 28-
Rev. 0 5/18/94
