SM55T Series 2.5 V

CMOS Clock Oscillators

June 2007

www.pletronics.com

425-776-1880

2

Part Number:

SM55

45

T

E

W

-XX

Packaging code or blank

T250 = 250 per Tape and Reel

T500 = 500 per Tape and Reel

T1K = 1000 per Tape and Reel

Part Marking:

PFF.FFF M

C YMDxx

or

PFF.FFF M

C YYWWxx

or

PLE SM55

FF.FFF M

CYMDxx

or

P5xYWWx

C FF.FF Mxxx

or

5xYWWxx

FF.FFF M

CPLE xxx

Frequency in MHz

Supply Voltage V

CC

W

= 2.5V +

_ 10%

Optional Enhanced OTR

Blank

E

Series Model

Frequency Stability

45

= +

_ 25 ppm

20

= +

_ 20 ppm

Series Model

Marking Legend:

PLE = Pletronics

FF.FFF

M = Frequency in MHz

YYWW or YWW or YMD = Date of Manufacture (year and week, or year-month-day)

All other marking is internal factory codes

Specifications such as frequency stability, supply voltage and operating temperature range, etc.

are not identified from the marking. External packaging labels and packing list will correctly

identify the ordered Pletronics part number.

Codes for Date Code YMD

Code

6

7

8

9

0

1

2

Year

2006

2007

2008

2009

2010

2011

2012

Code

A

B

C

D

E

F

G

H

J

K

L

M

Month

JAN

FEB

MAR

APR

MAY

JUN

JUL

AUG

SEP

OCT

NOV

DEC

Code

123456789

A

B

C

Day

123456789

10

11

12

Code

D

E

F

G

H

J

K

L

M

N

P

R

Day

13

14

15

16

17

18

19

20

21

22

23

24

Code

T

U

V

W

X

Y

Z

Day

25

26

27

28

29

30

31

Legacy Part Numbers:

‘S’

Denoted Symmetry of 45%/55% at 50% of V

inthe part number. We will still support part numbers with the ‘S’. For example: SM5545TW and SM5545TSW

describe the same specifications and can be used interchangeably by the customer.

-30 or -50

Denoted Output Load other than the standard 15 pF. Data sheets now reflect the specifications at all

available loads so this load designation is no longer needed. We will still support part numbers with this load

designation.