SI5325C-C-GM Datasheet, PDF (37/178 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCKS

Si53xx-RM
5. Pin Control Parts (Si5316, Si5322, Si5323, Si5365, Si5366)
These parts provide high-performance clock multiplication with simple pin control. Many of the control inputs are
three levels: High, Low, and Medium. High and Low are standard voltage levels determined by the supply voltage:
V_DD and Ground. If the input pin is left floating, it is driven to nominally half of V_DD. Effectively, this creates three
logic levels for these controls.
These parts span a range of applications and I/O capacity as shown in Table 3.
Table 3. Si5316, Si5322, Si5323, Si5365 and Si5366 Key Features
SONET Frequencies
DATACOM Frequencies
DATACOM/SONET internetworking
Fixed Ratio between input clocks
Flexible Frequency Plan
Number of Inputs
Number of Outputs
Jitter Attenuation
Si5316



2
1

Si5322




2
2
Si5323




2
2

Si5365




4
5
Si5366




4
5

5.1. Clock Multiplication (Si5316, Si5322, Si5323, Si5365, Si5366)
By setting the tri-level FRQSEL[3:0] pins these devices provide a wide range of standard SONET and data
communications frequency scaling, including simple integer frequency multiplication to fractional settings required
for coding and decoding.
5.1.1. Clock Multiplication (Si5316)
The device accepts dual input clocks in the 19, 39, 78, 155, 311, or 622 MHz frequency range and generates a de-
jittered output clock at the same frequency. The frequency range is set by the FRQSEL [1:0] pins, as shown in
Table 4.
Table 4. Frequency Settings
FRQSEL[1:0]
LL
LM
LH
ML
MM
MH
Output Frequency (MHz)
19.38–22.28
38.75–44.56
77.50–89.13
155.00–178.25
310.00–356.50
620.00–710.00
Rev. 1.2
37