R31DS0145EU0116 Rev. 1.16

Page 21

Sep 24, 2025

XK Datasheet

The topside markings consist of four characters as shown in Figure 21. The first character is always the prefix “S.”

The second character indicates the operating voltage and the frequency group of the oscillator. The third and

fourth character codes year and month) are described in Table 25.

For example, a top mark of “S7DK” would be 1.8V, Frequency Group 2, with a crystal data code of October, 2023.

Note that this is the crystal date code and not the silicon date code. The silicon information and customer

configuration are stored in the device at the factory.

7. Ordering Information

The example above gives us the following part number: XK33N156L312R625I. Let us dissect this part number.

We have an XK series XO in a 3225 package running from 3.3V. Three configurations are specified:

▪ Configuration 1 is a 156.25MHz LVPECL output, with an Active High OE on pin 1.

▪ Configuration 2 is a 312.5MHz LVDS output with an Active High OE on pin 1.

▪ Configuration 3 is a 625MHz HCSL output with an Active High OE on pin 1.

Table 25. Date Codes

Last Digit of Year

Year Code (y)

Month

Month Code (m)

1

A

1

A

2

B

2

B

3

C

3

C

4

D

4

D

5

E

5

E

6

F

6

F

7

G

7

G

8

H

8

H

9

J

9

J

0

K

10

K

-

-

11

L

-

-

12

M

Family

Package [1]

1. The Minimum Order Quantity (MOQ) for tape and reel packing is 2500 pieces. Orders less than 2500 pieces, or the portion of orders that

are not multiples of 2500 pieces will be packed on cut tape. For example, a 3500 piece order will be packed as 2500 pieces on tape and

reel and 1000 pieces on cut tape.

Voltage

Config. 1

(FS = low)

Config. 2

(FS = floating)

Config. 3

(FS = high)

Temperature

Range

Ordering

Code

XK

0 = 1.80 x 1.40 mm[2]

1 = 2.00 x 1.60 mm

2 = 2.50 × 2.00 mm

3 = 3.20 × 2.50 mm

2. Footprint compatible to 1612 package.

1 = 1.8V ±5%

2 = 2.5V ±5%

3 = 3.3V ±5%

Xfff

Xfff

Xfff

I: -40 to +85°C

3 = 3.20 × 2.50 mm

1 = 1.8V ±5% only

Xfff

Xfff

Xfff

K: -40 to +105°C

Example

XK

3

3

N156

L312

R625

I