554AA000256DG Silicon Laboratories Inc, 554AA000256DG Datasheet - Page 8

• Manufacturer Part Number: 554AA000256DG
• Manufacturer: Silicon Laboratories Inc

Specifications of 554AA000256DG

• Lead Free Status / Rohs Status: Compliant

Si 554
3. Ordering Information
The Si554 supports a variety of options including frequency, temperature stability, tuning slope, output format, and
V
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
and for further ordering instructions. The Si554 VCXO series is supplied in an industry-standard, RoHS-compliant,
lead-free, 8-pad, 5 x 7 mm package. Tape and reel packaging is an ordering option.
8
Example Part Number: 554AF000124DGR is a 5 x 7 mm Quad VCXO in an 8 pad package. Since the six digit code (000124) is > 000100, f0 is
622.08 MHz (lowest frequency), f1 is 644.53125, f2 is 657.42188, and f3 is 669.32658 MHz (highest frequency), with a 3.3 V supply, LVPECL
output, and Output Enable active high polarity. 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
A
B
C
D
E
F
G
H
J
K
M
N
P
Q
R
S
T
U
V
W
Note:
CMOS available to 160 MHz.
.
V
3.3
3.3
3.3
3.3
2.5
2.5
2.5
2.5
1.8
1.8
3.3
3.3
3.3
3.3
2.5
2.5
2.5
2.5
1.8
1.8
DD
Specific device configurations are programmed into the Si554 at time of shipment. Configurations are
Output Format Output Enable Polarity
LVPECL
LVDS
CMOS
CML
LVPECL
LVDS
CMOS
CML
CMOS
CML
LVPECL
LVDS
CMOS
CML
LVPECL
LVDS
CMOS
CML
CMOS
CML
1
st
Option Code
554 Quad VCXO
Product Family
554
High
High
High
High
High
High
High
High
High
High
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
X
Figure 1. Part Number Convention
X
Code
Notes:
1. For best jitter and phase noise performance, always choose the smallest Kv that meets
2. APR is the ability of a VCXO to track a signal over the product lifetime. A VCXO with an
3. Nominal Pull range (±) = 0.5 x V
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.
Four unique frequencies can be specified within the following bands of frequencies: 10 to
945 MHz, 970 to 1134 MHz, and 1213 to 1417 MHz. A six digit code will be assigned for
the specified combination of frequencies. Codes > 000100 refer to XOs programmed with
the lowest frequency value selected when FS[1:0] = 00, and the highest value when
FS[1:0] = 11. Six digit codes < 000100 refer to XOs programmed with the highest
frequency value selected when FS[1:0] = 00, and the lowest value when FS[1:0] = 11.
A
B
C
D
E
F
G
H
J
K
M
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.
APR of ±25 ppm is able to lock to a clock with a ±25 ppm stability over 15 years over all
operating conditions.
XXXXXX
Temperature
± ppm (max)
Rev. 0.6
Stability
100
100
100
20
20
20
20
50
50
20
50
www.silabs.com/VCXOPartNumber
Tuning Slope
ppm/V (typ)
6-digit Frequency Designator Code
180
135
180
180
135
356
356
33
Kv
90
90
45
D
= 0.5 x V
DD
2
x tuning slope.
nd
Option Code
DD
G
x tuning slope – stability – 10 ppm
3.3 V
100
150
100
295
375
185
130
12
30
80
25
(±ppm) for VDD @
Minimum APR
Device Revision Letter
R
Note 6
Note 6
Note 6
Operating Temp Range (°C)
2.5 V
145
220
300
104
125
G
75
30
75
R = Tape & Reel
Blank = Trays
to access this tool
–40 to +85 °C
Note 6
Note 6
Note 6
1.8 V
155
105
235
25
75
25
50
70