si5321 Silicon Laboratories, si5321 Datasheet - Page 9

• Manufacturer Part Number: si5321
• Description: Sonet/sdh Precision Clock Multiplier Ic
• Manufacturer: Silicon Laboratories

Table 3. AC Characteristics (Continued)
(V
Parameter
Transitionless Period Required
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
Recovery Time for Clearing an
LOS Condition
VALTIME = 0
VALTIME = 1
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
DD33
= 3.3 V ±5%, T
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.
A
= –20 to 85 °C)
Symbol
t
t
LOS
VAL
applied until the LOS flag
Measured from when a
valid reference clock is
Rev. 2.4
Test Condition
Figure 3
clears
24
16
12
10
9
8
/
/
/
/
/
/
Min
fo_622
fo_622
1.6
fo_622
fo_622
fo_622
fo_622
90
Typ
—
—
—
—
—
—
—
—
32
32
32
32
32
32
Si5321
Max
/
/
/
/
/
/
220
fo_622
fo_622
fo_622
fo_622
fo_622
fo_622
3.2
Unit
ms
s
9