84321AY www.idt.com REV. D 2/25/15
7
ICS84321
260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL F
REQUENCY 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 Units
V
OH
Output High Voltage; NOTE 1 V
CCO
- 1.4 V
CCO
- 0.9 V
V
OL
Output Low Voltage; NOTE 1 V
CCO
- 2.0 V
CCO
- 1.7 V
V
SWING
Peak-to-Peak Output Voltage Swing 0.6 1.0 V
NOTE 1: Outputs terminated with 50 Ω to V
CCO
- 2V. See “Parameter Measurement Information” section,
“3.3V Output Load Test Circuit”.
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
f
IN
Input Frequency
TEST_CLK; NOTE 1 14 40 MHz
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 Test Conditions Minimum Typical Maximum Units
Mode of Oscillation Fundamental
Frequency 14 40 MHz
Equivalent Series Resistance (ESR) 50
Ω
Shunt Capacitance 7pF
Drive Level 1mW
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 Units
F
OUT
Output Frequency 103.3 260 MHz
tjit(per) Period Jitter, RMS; NOTE 1 3 4.5 ps
tsk(o) Output Skew; NOTE 2, 3 15 ps
t
R
/ t
F
Output Rise/Fall Time 20% to 80% 200 700 ps
t
S
Setup Time
M, N to nP_LOAD 5 ns
S_DATA to S_CLOCK 5 ns
S_CLOCK to S_LOAD 5 ns
t
H
Hold Time
M, N to nP_LOAD 5 ns
S_DATA to S_CLOCK 5 ns
S_CLOCK to S_LOAD 5 ns
odc Output Duty Cycle 45 55 %
t
LOCK
PLL Lock Time 1ms
See Parameter Measurement Information section.
NOTE 1: Jitter performance using XTAL inputs.
NOTE 2: Defi ned 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 defi ned in accordance with JEDEC Standard 65.
