参数资料
型号: 554CD000130BG
厂商: SILICON LABORATORIES
元件分类: VCXO, clock
英文描述: VCXO, CLOCK, 74.25 MHz, CMOS OUTPUT
封装: ROHS COMPLIANT, SMD, 8 PIN
文件页数: 39/115页
文件大小: 3254K
代理商: 554CD000130BG
Si554
Rev. 0.5
3
Table 3. CLK± Output Frequency Characteristics
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
Nominal Frequency1,2,3
fO
LVDS/CML/LVPECL
10
945
MHz
CMOS
10
160
Temperature Stability1,4
f/fO
TA = –40 to +85 C
–20
–50
–100
+20
+50
+100
ppm
Absolute Pull Range1,4
APR
±25
±150
ppm
Aging
Frequency drift over 15
year life.
——
±10
ppm
Power up Time5
tOSC
——
10
ms
Settling Time After FS[1:0] Change
tFRQ
Both FS[1] and FS[0]
changing simultaneously
——
20
ms
Notes:
1. See Section 3. "Ordering Information" on page 7 for further details.
2. Specified at time of order by part number. Also available in frequencies from 970 to 1134 MHz and 1213 to 1417 MHz.
3. Nominal output frequency set by VCNOM =3/8 xVDD.
4. Selectable parameter specified by part number.
5. Time from power up or tristate mode to fO (to within ±1 ppm of fO).
Table 4. CLK± Output Levels and Symmetry
Parameter
Symbol
Test Condition
Min
Typ
Max
Units
LVPECL Output Option1
VO
mid-level
VDD – 1.42
VDD – 1.25
V
VOD
swing (diff)
1.1
1.9
VPP
VSE
swing (single-ended)
0.5
0.93
VPP
LVDS Output Option2
VO
mid-level
1.125
1.20
1.275
V
VOD
swing (diff)
0.32
0.40
0.50
VPP
CML Output Option2
VO
mid-level
VDD – 0.75
V
VOD
swing (diff)
0.70
0.95
1.20
VPP
CMOS Output Option3
VOH
IOH =32mA
0.8 x VDD
VDD
V
VOL
IOL =32mA
——
0.4
Rise/Fall time (20/80%)
tR, tF
LVPECL/LVDS/CML
350
ps
CMOS with CL = 15 pF
1
ns
Symmetry (duty cycle)
SYM
LVPECL:
VDD – 1.3 V (diff)
LVDS:
1.25 V (diff)
CMOS:
VDD/2
45
55
%
Notes:
1. 50
to VDD – 2.0 V.
2. Rterm = 100 (differential).
3. CL = 15 pF
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