842023 Datasheet, PDF (4/15 Pages) Integrated Device Technology – Femtoclock™ Crystal-to-HSTL Clock Generator

842023 DATA SHEET
Table 4. Crystal Characteristics
Parameter
Test Conditions
Mode of Oscillation
Frequency
Equivalent Series Resistance (ESR)
Shunt Capacitance
NOTE: It is not recommended to overdrive the crystal input with an external clock.
Minimum Typical Maximum
Fundamental
24.5
34
50
7
Units
MHz

pF
AC Electrical Characteristics
Table 5A. AC Characteristics, V_DD = 3.3V ± 5%, T_A = 0°C to 70°C
Parameter Symbol
Test Conditions
f_OUT
tjit(Ø)
Output Frequency
RMS Phase Jitter,
Random; NOTE 1
250MHz
Integration Range: 1.875MHz – 20MHz
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
Minimum
245
200
48
NOTE 1: Please refer to Phase Noise Plots.
Typical
0.36
Maximum Units
340
MHz
ps
700
ps
52
%
Table 5B. AC Characteristics, V_DD = 2.5V ± 5%, T_A = 0°C to 70°C
Parameter Symbol
Test Conditions
f_OUT
tjit(Ø)
Output Frequency
RMS Phase Jitter,
Random; NOTE 1
250MHz
Integration Range: 1.875MHz – 20MHz
t_R / t_F
odc
Output Rise/Fall Time
Output Duty Cycle
20% to 80%
Minimum
245
200
48
NOTE 1: Please refer to Phase Noise Plots.
Typical
0.32
Maximum Units
340
MHz
ps
700
ps
52
%
FEMTOCLOCK™ CRYSTAL-TO-HSTL CLOCK GENERATOR
4
Rev A 8/14/15