ICS8442I Datasheet, PDF (6/15 Pages) Integrated Circuit Systems – 700MHZ, CRYSTAL OSCILLATOR-TO-DIFFERENTIAL LVDS FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS8442I
700MHZ, CRYSTAL OSCILLATOR-TO-DIFFERENTIAL
LVDS FREQUENCY SYNTHESIZER
TABLE 5. INPUT FREQUENCY CHARACTERISTICS, V_DD = V_DDA = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
TEST_CLK; NOTE 1
10
25
MHz
f_IN
Input Frequency
XTAL_IN, XTAL_OUT;
NOTE 1
10
25
MHz
S_CLOCK
50
MHz
NOTE 1: For the input crystal and TEST_CLK frequency range the M value must be set for the VCO to operate within the
250MHz to 700MHz range. Using the minimum input frequency of 10MHz valid values of M are 25 ≤ M ≤ 70. Using the
maximum frequency of 25MHz valid values of M are 10 ≤ M ≤ 28.
TABLE 6. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
Test Conditions
Minimum Typical Maximum
Fundamental
10
25
50
7
1
Units
MHz
Ω
pF
mW
TABLE 7. AC CHARACTERISTICS, V_DD = V_DDA = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
F_OUT
tjit(cc)
Output Frequency
Cycle-to-Cycle Jitter; NOTE 1, 3
N = 1, 2
N=4
31.25
700
18
32
29
55
tjit(per) Period Jitter, RMS; NOTE 1, 3
3.5
11
tsk(o) Output Skew; NOTE 2, 3
15
t_R / t_F
Output Rise/Fall Time
20% to 80%
150
750
M, N to nP_LOAD
5
t_S
Setup Time S_DATA to S_CLOCK
5
S_CLOCK to S_LOAD
5
M, N to nP_LOAD
5
t_H
Hold Time S_DATA to S_CLOCK
5
S_CLOCK to S_LOAD
5
odc
Output Duty Cycle; NOTE 4
N>1
47
53
t_PW
Output Pulse Width
N=1
t_Period/2 - 150
t_Period/2 + 150
t
PLL Lock Time
1
LOCK
See Parameter Measurement Information section.
NOTE 1: Jitter performance using XTAL inputs.
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.
Measured at the output differential cross points.
NOTE 3: This parameter is defined in accordance with JEDEC Standard 65.
NOTE 4: In the Application Section, please refer to the application note, "Differential Duty Cycle Improvement".
Units
MHz
ps
ps
ps
ps
ps
ns
ns
ns
ns
ns
ns
%
ps
ms
8442AYI
www.icst.com/products/hiperclocks.html
6
REV. C MAY 10, 2005