Si5321 Datasheet, PDF (13/34 Pages) List of Unclassifed Manufacturers – SONET/SDH PRECISION CLOCK MULTIPLIER IC

Si5321
Table 4. AC Characteristics (PLL Performance Characteristics) (Continued)
(V_DD33 = 3.3 V ±5%, TA = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min Typ Max Unit
Wander/Jitter at 6400 Hz Bandwidth
(BWSEL[1:0] = 11 and BWBOOST = 0)
Jitter Tolerance (see Figure 7)
J_TOL(PP)
f = 64 Hz
f = 640 Hz
1000 —
100 —
— ns
— ns
f = 6400 Hz
10 — — ns
CLKOUT RMS Jitter Generation
FEC[2:0] = 000
J_GEN(RMS)
12 kHz to 20 MHz
50 kHz to 80 MHz
— 1.0 1.3 ps
— 0.4 .55 ps
CLKOUT RMS Jitter Generation
J_GEN(RMS)
FEC[2:0] = 001, 010, 100,101, 110, 111
12 kHz to 20 MHz
50 kHz to 80 MHz
— 1.0 1.5 ps
— .45 0.7 ps
CLKOUT Peak-Peak Jitter Generation
FEC[2:0] = 000
J_GEN(PP)
12 kHz to 20 MHz
50 kHz to 80 MHz
— 9.3 13.0 ps
— 4.1 6.0 ps
CLKOUT Peak-Peak Jitter Generation J_GEN(PP)
FEC[2:0] = 001, 010, 100,101, 110, 111
12 kHz to 20 MHz
50 kHz to 80 MHz
— 8.0 20.0 ps
— 4.0 7.5 ps
Jitter Transfer Bandwidth (see Figure 6)
F_BW
Wander/Jitter Transfer Peaking
J_P
Wander/Jitter at 12800 Hz Bandwidth
(BWSEL[1:0] = 11 and BWBOOST = 1)
Jitter Tolerance (see Figure 7)
BW = 6400 Hz
< 6400 Hz
f = 128 Hz
— 6400 — Hz
— 0.05 0.1 dB
500 — — ns
f = 1280 Hz
50 — — ns
f = 12800 Hz
5
— — ns
CLKOUT RMS Jitter Generation
FEC[2:0] = 000
J_GEN(RMS)
12 kHz to 20 MHz
50 kHz to 80 MHz
— .85 1.2 ps
— .35 .55 ps
CLKOUT Peak-Peak Jitter Generation
FEC[2:0] = 000
J_GEN(PP)
12 kHz to 20 MHz
50 kHz to 80 MHz
— 6.8 11.0 ps
— 3.4 5.5 ps
Jitter Transfer Bandwidth (see Figure 6)
Wander/Jitter Transfer Peaking
Acquisition Time
F_BW
BW = 12,800 Hz
— 12800 — Hz
J_P
< 12,800 Hz
— 0.05 .1 dB
T_AQ
RSTN/CAL high to
— 300 350 ms
CAL_ACTV low, with valid
clock input and VALTIME = 0
Notes:
1. Higher PLL bandwidth settings provide smaller clock output wander with temperature gradient.
2. For reliable device operation, temperature gradients should be limited to 10 °C/min.
3. Telcordia GR-1244-CORE requirements specify maximum phase transient slope during clock rearrangement in terms
of nanoseconds per millisecond. The equivalent ps/µs unit is used here since the maximum phase transient magnitude
for the Si5321 (tPT_MTIE) never reaches one nanosecond.
Rev. 2.3
13