ICS84321 Datasheet, PDF (7/18 Pages) Integrated Circuit Systems – 260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER

Integrated
Circuit
Systems, Inc.
ICS84321
260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
TABLE 4C. LVPECL DC CHARACTERISTICS, V_CC = V_CCA = V_CCO = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
V_OH
Output High Voltage; NOTE 1
V_CCO - 1.4
V_CCO - 1.0
V_OL
Output Low Voltage; NOTE 1
V_CCO - 2.0
V_CCO - 1.7
V_SWING Peak-to-Peak Output Voltage Swing
0.6
1.0
NOTE 1: Outputs terminated with 50 Ω to V_CCO - 2V. See "Parameter Measurement Information" section,
"3.3V Output Load Test Circuit".
Units
V
V
V
TABLE 5. INPUT FREQUENCY CHARACTERISTICS, V_CC = V_CCA = V_CCO = 3.3V±5%, TA = 0°C TO 70°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
TEST_CLK; NOTE 1
14
40
MHz
f
IN
Input Frequency
XTAL_IN, XTAL_OUT;
NOTE 1
14
40
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 620MHz to 780MHz range. Using the minimum input frequency of 14MHz, valid values of M are 45 ≤ M ≤ 55.
Using the maximum frequency of 40MHz, valid values of M are 16 ≤ M ≤ 19.
TABLE 6. CRYSTAL CHARACTERISTICS
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
Drive Level
Test Conditions
Minimum Typical Maximum
Fundamental
14
40
50
7
1
Units
MHz
Ω
pF
mW
TABLE
7.
AC
CHARACTERISTICS,
V
CC
=
V=
CCA
V
CCO
=
3.3V±5%,
TA
=
0°C
TO
70°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
F_OUT
Output Frequency
tjit(per) Period Jitter, RMS; NOTE 1
103.3
260
3
4.5
tsk(o) Output Skew; NOTE 2, 3
15
t_R / t_F
Output Rise/Fall Time
20% to 80%
200
700
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
45
55
t_LOCK
PLL Lock Time
1
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.
Units
MHz
ps
ps
ps
ns
ns
ns
ns
ns
ns
%
ms
84321AY
www.icst.com/products/hiperclocks.html
REV. B JUNE 9, 2005
7