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84321I Datasheet, PDF (6/18 Pages) Integrated Device Technology – 260MHz, Crystal-to-3.3V Differential
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84321I DATA SHEET
TABLE 4C. LVPECL DC CHARACTERISTICS, VCC = VCCA = VCCO = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical
VOH
Output High Voltage; NOTE 1
VCCO - 1.4
VOL
Output Low Voltage; NOTE 1
VCCO - 2.0
VSWING Peak-to-Peak Output Voltage Swing
0.6
NOTE 1: Outputs terminated with 50 Ω to VCCO - 2V. See “Parameter Measurement Information” section,
“3.3V Output Load Test Circuit”.
Maximum
VCCO - 0.9
VCCO - 1.7
1.0
Units
V
V
V
TABLE 5. INPUT FREQUENCY CHARACTERISTICS, VCC = VCCA = VCCO = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum Units
TEST_CLK; NOTE 1
14
40
MHz
fIN
Input Frequency XTAL1, XTAL2; NOTE 1
S_CLOCK
14
40
MHz
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
Test Conditions
Minimum Typical Maximum
Fundamental
14
40
50
7
Units
MHz
Ω
pF
TABLE 7. AC CHARACTERISTICS, VCC = VCCA = VCCO = 3.3V±5%, TA = -40°C TO 85°C
Symbol Parameter
Test Conditions
Minimum Typical Maximum
FOUT
Output Frequency
tjit(per) Period Jitter, RMS; NOTE 1
103.3
260
3
5
tsk(o) Output Skew; NOTE 2, 3
15
tR / tF
Output Rise/Fall Time
20% to 80%
200
700
M, N to nP_LOAD
5
tS
Setup Time S_DATA to S_CLOCK
5
S_CLOCK to S_LOAD
5
M, N to nP_LOAD
5
tH
Hold Time S_DATA to S_CLOCK
5
S_CLOCK to S_LOAD
5
odc
Output Duty Cycle
45
55
tLOCK
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
260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
6
LVPECL FREQUENCY SYNTHESIZER
REVISION B 11/5/15
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