
Si552
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 Change
tFRQ
——
10
ms
Notes:
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