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MECHANICALS FOR THE K25C81-FN

N

Y BRK

D

L

44

Leads

PLCC

M

B

0.18 (0.007)

M

T N

S

-

P

S

L

S

-

M

S

U

W

Z1

D

0.18 (0.007)

M

T N

S

-

P

S

L

S

-

M

S

Note 1

(Note 1) 44

1

P

V

A

Z

0.18 (0.007)

M

T L

S

-

M

S

N

S

-

P

S

X

View D-D

G1

0.25 (0.010)

M

T N

S

-

P

S

L

S

-

M

S

R

0.18 (0.007)

M

T L

S

-

M

S

N

S

-

P

S

H

C

+

+

0.18 (0.007)

M

T L

S

-

M

S

N

S

-

P

S

0.18 (0.007)

M

T N

S

-

P

S

L

S

-

M

S

E

G

K1

K

F

44

(Note 1)

0.18 (0.007)

0.18 (0.007)

M

M

T L

S

-

M

S

N

S

-

P

S

T N

S

-

P

S

L

S

-

M

S

J

G1

0.25 (0.010)

M

Detail S

0.010 (0.004)

T

Detail S

Seating Plane

MILLIMETERS

INCHES

T L

S

-

M

S

N

S

-

P

S

Notes:

1. Due to space limitation, the chip

is represented by a general (smaller)

case outline drawing rather than

showing all 44 leads.

2. Datums L, M, N, and P determine where

the top of the lead shoulder exits plastic

body at mold parting line

3. DIM G1, true position to be measured

at Datum T, Seating Plane

4. DIM R and U do not include mold

protusion. Allowable mold protusion is

0.25 (0.010) per side.

5. Dimensioning and tolerancing per Ansi

Y14.5M, 1982

6. Controlling dimension: Inch

DIM

A

B

C

E

F

G

H

J

K

R

U

V

W

X

Y

Z

G1

K1

Z1

MIN MAX

17.40 17.65

17.40 17.65

4.20 4.57

2.29 2.79

0.33 0.48

1.27 BSC

0.66 0.81

0.51

-

0.64

-

16.51 16.66

16.51 16.66

1.07 1.21

1.07 1.21

1.07 1.42

-

0.50

2

0

10

0

15.50 16.00

1.02

-

2

0

10

0

MIN MAX

0.685 0.695

0.685 0.695

0.165 0.180

0.090 0.110

0.013 0.019

0.050 BSC

0.026 0.032

0.020

-

0.025

-

0.650 0.656

0.650 0.656

0.042 0.048

0.042 0.048

0.042 0.056

-

0.020

2

0

10

0

0.610 0.630

0.040

-

2

10

0

Copyright Semtech, 1997-2001

DOC5-C81-DS-105

9

www.semtech.com

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