Si5321 Datasheet, PDF (9/34 Pages) List of Unclassifed Manufacturers – SONET/SDH PRECISION CLOCK MULTIPLIER IC

Si5321
Table 3. AC Characteristics (Continued)
(V_DD33 = 3.3 V ±5%, T_A = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ Max Unit
Transitionless Period Required
t_LOS
on CLKIN for Detecting a LOS
Condition.
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
Figure 3
24_{/fo_622}
—
32_{/fo_622}
16_{/fo_622}
—
32_{/fo_622}
s
12_{/fo_622}
—
32_{/fo_622}
10_{/fo_622}
—
32_{/fo_622}
9_{/fo_622}
—
32_{/fo_622}
8_{/fo_622}
—
32_{/fo_622}
Recovery Time for Clearing an
LOS Condition
VALTIME = 0
VALTIME = 1
t_VAL
Measured from when a
valid reference clock is
applied until the LOS flag _1.6
clears
90
—
3.2
ms
—
220
Note: The Si5321 provides a 1/32x, 1/16x, 1/8x, 1/4x, 1/2x, 1x, 2x, 4x, 8x, 16x, 32x, 64x, or 128x clock multiplication function
with an option for additional frequency scaling by a factor of 255/238, 238/255, 255/237, 237/255, 66/64, or 64/66 for
FEC rate conversion.
Rev. 2.3
9