參數(shù)資料
型號: SI5320
廠商: Electronic Theatre Controls, Inc.
英文描述: SONET/SDH PRECISION CLOCK MULTIPLIER IC
中文描述: SONET / SDH的精密時鐘倍頻集成電路
文件頁數(shù): 13/34頁
文件大?。?/td> 538K
代理商: SI5320
Si5320
Rev. 2.3
13
Acquisition Time
T
AQ
RSTN/CAL high to
CAL_ACTV low, with valid
clock input and
VALTIME = 0
300
350
ms
Clock Output Wander with
Temperature Gradient
1,2
C
CO_TG
Stable Input Clock;
Temperature
Gradient <10
°
C/min;
800 Hz Loop BW
50
ps/
°
C/
min
Initial Frequency Accuracy in Digital Hold
Mode (first 100 ms with supply voltage and tem-
perature held constant)
C
DH_FA
Stable Input Clock
Selected until entering
Digital Hold
10
ppm
Clock Output Frequency Accuracy Over
Temperature in Digital Hold Mode
C
DH_T
Constant Supply Voltage
16.7
30
ppm
/
°
C
Clock Output Frequency Accuracy Over Supply
Voltage in Digital Hold Mode
C
DH_V33
Constant Temperature
250
ppm
/V
Clock Output Phase Step
3
(See Figure 8)
t
PT_MTIE
When hitlessly recovering
from Digital Hold mode
1/1
–200
0
200
ps
Clock Output Phase Step Slope
3
(See Figure 8)
BWSEL[1:0] = 11, FEC[1:0] = 00, DBLBW = 0
BWSEL[1:0] = 00, FEC[1:0] = 00, DBLBW = 0
BWSEL[1:0] = 01, FEC[1:0] = 00, DBLBW = 0
BWSEL[1:0] = 10, FEC[1:0] = 00, DBLBW = 0
m
PT
When hitlessly recovering
from Digital Hold mode
6400 Hz, No Scaling
3200 Hz, No Scaling
1600 Hz, No Scaling
800 Hz, No Scaling
10
5
2.5
1.25
ps/
μ
s
Table 4. AC Characteristics (PLL Performance Characteristics) (Continued)
(V
DD33
= 3.3 V ±5%, TA = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max Unit
Notes:
1.
Higher PLL bandwidth settings provide smaller clock output wander with temperature gradient.
2.
For reliable device operation, temperature gradients should be limited to 10 °C/min.
3.
Telcordia GR-1244-CORE requirements specify maximum phase transient slope during clock rearrangement in terms of
nanoseconds per millisecond. The equivalent ps/
μ
s unit is used here since the maximum phase transient magnitude for the
Si5320 (tPT_MTIE) never reaches one nanosecond.
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