Si5321

Rev. 2.3

13

Wander/Jitter at 6400 Hz Bandwidth

(BWSEL[1:0] = 11 and BWBOOST = 0)

Jitter Tolerance (see Figure 7)

f= 64 Hz

1000

—

—ns

f= 640Hz

100

—

—ns

f = 6400 Hz

10

—

—ns

CLKOUT RMS Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

1.0

1.3

ps

50 kHz to 80 MHz

—

0.4

.55

ps

CLKOUT RMS Jitter Generation

FEC[2:0] = 001, 010, 100,101, 110, 111

12 kHz to 20 MHz

—

1.0

1.5

ps

50 kHz to 80 MHz

—

.45

0.7

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

9.3

13.0

ps

50 kHz to 80 MHz

—

4.1

6.0

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 001, 010, 100,101, 110, 111

12 kHz to 20 MHz

—

8.0

20.0

ps

50 kHz to 80 MHz

—

4.0

7.5

ps

Jitter Transfer Bandwidth (see Figure 6)

BW = 6400 Hz

—

6400

—Hz

Wander/Jitter Transfer Peaking

< 6400 Hz

—

0.05

0.1

dB

Wander/Jitter at 12800 Hz Bandwidth

(BWSEL[1:0] = 11 and BWBOOST = 1)

Jitter Tolerance (see Figure 7)

f = 128 Hz

500

—

—

ns

f = 1280 Hz

50

—

—

ns

f = 12800 Hz

5

—

—

ns

CLKOUT RMS Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

.85

1.2

ps

50 kHz to 80 MHz

—

.35

.55

ps

CLKOUT Peak-Peak Jitter Generation

FEC[2:0] = 000

12 kHz to 20 MHz

—

6.8

11.0

ps

50 kHz to 80 MHz

—

3.4

5.5

ps

Jitter Transfer Bandwidth (see Figure 6)

BW = 12,800 Hz

—

12800

—

Hz

Wander/Jitter Transfer Peaking

< 12,800 Hz

—

0.05

.1

dB

Acquisition Time

RSTN/CAL high to

CAL_ACTV low, with valid

clock input and VALTIME = 0

—

300

350

ms

Table 4. AC Characteristics (PLL Performance Characteristics) (Continued)

Parameter

Symbol

Test Condition

Min

Typ

Max Unit

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.