參數(shù)資料
型號(hào)： T9000
英文描述： ISDN Network Termination Node (NTN) Device
中文描述： ISDN網(wǎng)絡(luò)終端節(jié)點(diǎn)（新界北）設(shè)備
文件頁數(shù)： 113/126頁
文件大?。?/td> 2127K
代理商： T9000
Lucent Technologies Inc.
113
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
T9000
21 Crystal Characteristics
Table 123. Fundamental Mode Crystal Characteristics
These are the characteristics of a parallel resonant crystal for meeting the
±
100 ppm requirements of T1.601 for
NT operation. The parasitic capacitance of the PC board to which the T9000 crystal is mounted must be kept within
the range of 0.6 pF
±
0.4 pF.
Table 124. Internal PLL Characteristics
* Set by digital PLL; therefore, variations track MTC (LT mode) or U-interface line rate (NT mode).
22 Timing Characteristics
Table 125. MTC (Master Timing Clock) Requirements and Characteristics* (LT Mode)
* To meet ANSI T1.601-1992, see not for Recommended Operating Conditions.
One UI = 12.5 μs
.
Parameter
Symbol
F
O
TOL
Test Conditions
With 25.0 pF of loading
—
Specifications
15.36
±
70
Unit
MHz
ppm
Center Frequency
Tolerance Including Calibration, Tempera-
ture Stability, and Aging
Drive Level
Series Resistance
Shunt Capacitance
Motional Capacitance
DL
R
S
C
O
C
M
Maximum
Maximum
—
—
0.5
20
mW
pF
fF
3.0
±
20%
12
±
20%
Parameter
Test Conditions
—
–3 dB point (LT)
–3 dB point (NT), 18 kft 26 AWG
at 0.15 Hz typical (LT)
at 1.5 Hz typical (NT)
Min
±
250
—
—
—
—
Typ
—
0.45*
5*
0.4*
1.0*
Max
—
—
—
—
—
Unit
ppm
Hz
Hz
dB
dB
Total Pull Range
Jitter Transfer Function
Jitter Peaking
Parameter
Min
Typ
125
—
—
—
Max
Unit
μs
MCLKs
ns
UI
MTC Clock Period
MTC High/Low Time
MTC Rise/Fall Time
MTC Jitter
125 – 32 ppm
8
—
—
125 + 32 ppm
—
60
0.259
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