Si550

8

Preliminary Rev. 0.3

3. Ordering Information

The Si550 was designed to support a variety of options including frequency, temperature stability, tuning slope,

Specific device configurations are programmed into the Si550 at time of shipment.

Configurations are specified using the Part Number Configuration chart shown below. Silicon Labs provides a web

browser-based part number configuration utility to simplify this process. Refer to www.silabs.com/

VCXOPartNumber to access this tool and for further ordering instructions. The Si550 VCXO series is supplied in

an industry-standard, RoHS compliant, lead-free, 6-pad, 5 x 7 mm package. Tape and reel packaging is an

ordering option.

Example Part Number: 550AF622M080BGR is a 5 x 7 mm VCXO in a 6 pad package. The nominal frequency is 622.080 MHz, with

a 3.3 V supply and LVPECL output. Temperature stability is specified as ±50 ppm and the tuning slope is 135 ppm/V. The part is

specified for a –40 to +85 C° ambient temperature range operation and is shipped in tape and reel format.

DD

R = Tape & Reel

Blank = Trays

Operating Temp Range (°C)

G

–40 to +85 °C

Device Revision Letter

Temperature

Tuning Slope

Minimum APR

Stability

Kv

(±ppm)

Code

± ppm (max)

ppm/V (typ)

@ 3.3 V

@ 2.5 V

@ 1.8 V

A

100

180

100

75

25

B

100

90

30

Note 6

Note 6

C

50

180

150

125

75

D50

90

80

30

25

E

20

45

25

Note 6

Note 6

F

50

135

100

75

50

Notes:

1. For best jitter and phase noise performance, always choose the smallest Kv that

meets the application’s minimum APR requirements. Unlike SAW-based solutions

which require higher higher Kv values to account for their higher temperature

dependence, the Si55x series provides lower Kv options to minimize noise coupling

and jitter in real-world PLL designs. See AN255 and AN266 for more information.

2. APR is the ability of a VCXO to track a signal over the product lifetime. A VCXO with

an APR of ±25 ppm is able to lock to a clock with a ±25 ppm stability, over 15 years.

4. Nominal Absolute Pull Range (±APR) = Pull range – stability – lifetime aging

5. Minimum APR values noted above include worst case values for all parameters.

6. Combination not available.

550 VCXO

Product Family

Code

VDD

Output Format

A3.3

LVPECL

B3.3

LVDS

C3.3

CMOS

D3.3

CML

E2.5

LVPECL

F2.5

LVDS

G2.5

CMOS

H2.5

CML

J1.8

CMOS

K1.8

CML

Notes:

CMOS available to 160 MHz.

Frequency (e.g. 622M080 is 622.080 MHz)

Available frequency range is 10 to 945 MHz, 970 to 1134, and 1213

to 1417 MHz. The position of “M” shifts to denote higher or lower

frequencies.

550

X

X

XXXMXXX

B

G

R