SI5341 Datasheet, PDF (9/56 Pages) Silicon Laboratories – LOW-JITTER, 10-OUTPUT, ANY-FREQUENCY, ANY-OUTPUT CLOCK GENERATOR

Si5341/40
Table 5. Differential Clock Output Specifications
(V_DD = 1.8 V ±5%, V_DDA = 3.3 V ±5%, V_DDO = 1.8 V ±5%, 2.5 V ±5%, or 3.3 V ±5%, T_A = –40 to 85 °C)
Parameter
Output Frequency
Duty Cycle
Output-Output Skew
OUT-OUT Skew
Output Amplitude^{1, 5}
Symbol
f_OUT
DC
Test Condition
f_OUT < 400 MHz
400 MHz < f_OUT <
712.5 MHz
Min Typ
0.0001 —
48
—
45
—
T_SK Outputs on same Multisynth, —
20
Normal Mode
Outputs on same Multisynth, —
20
Pow Power Mode
T_{SK_OUT} Measured from the positive —
0
to negative output pins
Normal Mode
V_OUT V_DDO = 3.3 V,
2.5 V, or 1.8 V
LVDS
350 470
V_DDO = 3.3 V
or 2.5 V
LVPECL
660 810
Max
712.5
52
55
Units
MHz
%
%
50
ps
100
ps
100
ps
550 mVpp_se
1000
V_OUT
V_DDO = 3.3 V,
2.5 V, or 1.8 V
V_DDO = 3.3 V
or 2.5 V
Low Power Mode
LVDS
300 420
LVPECL 620 820
530 mVpp_se
1060
Notes:
1. The typical normal mode (or low power mode) LVDS maximum is 100 mV (or 80 mV) higher than the TIA/EIA-644
maximum. For normal and low-power modes, the amplitudes are programmable through register settings and can be
stored in NVM. Each output driver can be programmed independently. See Appendix A of the Si5341/40 Reference
Manual.
2. Driver output impedance depends on selected output mode (Normal, Low Power).
3. Measured for 156.25 MHz carrier frequency. Sinewave noise added to VDDO (1.8 V = 50 mVpp, 2.5 V/
3.3 V = 100 mVpp) and noise spur amplitude measured.
OUTx
OUTx
Vcm
Vcm
Vpp_se
Vpp_se
Vpp_diff = 2*Vpp_se
4. Measured across two adjacent outputs, both in LVDS mode, with the victim running at 155.52 MHz and the aggressor
at 156.25 MHz. Refer to application note, “AN862: Optimizing Si534x Jitter Performance in Next Generation Internet
Infrastructure Systems”, guidance on crosstalk minimization.
5. For other amplitudes see Appendix A of the Si5341/40 Reference Manual.
6. See Note 4, but in this case the measurement is across two output clocks that have a single clock between them.
7. Same as Note 4, but the Si5340 has less crosstalk due to the spacing of adjacent outputs.
Rev. 1.0
9