LMK00308 Datasheet, PDF (7/25 Pages) Texas Instruments – 3-GHz 8-Output Differential Clock Buffer/Level Translator

Symbol
F_CLK
F_XTAL
C_IN
f_{CLKout_FS}
f_{CLKout_RS}
Jitter_ADD
Jitter_ADD
Noise Floor
DUTY
V_OH
V_OL
V_OD
t_R
t_F
Parameter
Conditions
Min
Crystal Interface (OSCin, OSCout)
External Clock
Frequency Range
(Note 20)
OSCin driven single-ended,
OSCout floating
Fundamental mode crystal
Crystal Frequency Range
ESR ≤ 200 Ω (10 to 30 MHz)
10
ESR ≤ 125 Ω (30 to 40 MHz)
(Note 15)
OSCin Input Capacitance
LVPECL Outputs (CLKoutAn/CLKoutAn*, CLKoutBn/CLKoutBn*)
Maximum Output Frequency
Full V_OD Swing
(Note 20, Note 21)
Maximum Output Frequency
Reduced V_OD Swing
(Note 20, Note 21)
V_OD ≥ 600 mV,
R_L = 100 Ω
differential
Vcco = 3.3 V ± 5%,
1.0
R_T = 160 Ω to GND
Vcco = 2.5 V ± 5%,
0.75
R_T = 91 Ω to GND
Vcco = 3.3 V ± 5%,
V_OD ≥ 400 mV,
R_T = 160 Ω to GND
1.5
R_L = 100 Ω
Vcco = 2.5 V ± 5%,
differential
1.5
R_T = 91 Ω to GND
CLKin: 100 MHz, Slew
Additive RMS Jitter
Integration Bandwidth
1 MHz to 20 MHz
(Note 16)
Vcco = 3.3 V,
rate ≥ 3 V/ns
R_T = 160 Ω to GND, CLKin: 156.25 MHz,
R_L = 100 Ω
Slew rate ≥ 2.7 V/ns
differential
CLKin: 625 MHz, Slew
rate ≥ 3 V/ns
Additive RMS Jitter with
LVPECL clock source from
LMK03806
(Note 16, Note 17)
CLKin: 156.25 MHz,
Vcco = 3.3 V, J_SOURCE = 190 fs RMS
R_T = 160 Ω to GND, (10 kHz to 1 MHz)
R_L = 100 Ω
differential
CLKin: 156.25 MHz,
J_SOURCE = 195 fs RMS
(12 kHz to 20 MHz)
CLKin: 100 MHz, Slew
Vcco = 3.3 V,
rate ≥ 3 V/ns
Noise Floor
f_OFFSET ≥ 10 MHz
R_T = 160 Ω to GND, CLKin: 156.25 MHz,
R_L = 100 Ω
Slew rate ≥ 2.7 V/ns
differential
CLKin: 625 MHz, Slew
rate ≥ 3 V/ns
Duty Cycle (Note 20)
50% input clock duty cycle
45
Output High Voltage
Vcco -
1.2
Output Low Voltage
Output Voltage Swing
(Note 14)
T_A = 25 °C, DC Measurement,
R_T = 50 Ω to Vcco - 2 V
Vcco -
2.0
600
Output Rise Time
20% to 80%
Output Fall Time
80% to 20%
R_T = 160 Ω to GND,
R_L = 100 Ω differential
Typ Max
250
40
1
1.2
1.0
3.1
2.3
59
64
30
20
51
-162.5
-158.1
-154.4
Vcco -
0.9
Vcco -
1.75
55
Vcco -
0.7
Vcco -
1.5
830 1000
175
175
Units
MHz
MHz
pF
GHz
GHz
fs
fs
dBc/Hz
%
V
V
mV
ps
ps
7
www.ti.com