Si5321 Datasheet, PDF (7/34 Pages) List of Unclassifed Manufacturers – SONET/SDH PRECISION CLOCK MULTIPLIER IC

Si5321
Table 3. AC Characteristics
(V_DD33 = 3.3 V ±5%, T_A = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ Max Unit
Input Clock Frequency (CLKIN)
FEC[2:0] = 000 (non FEC)
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
f_CLKIN
No FEC Scaling
19.436 — 21.685
38.872 — 43.369 MHz
77.744 — 86.738
155.48 — 173.48
310.97 — 346.95
621.95 — 693.90
Input Clock Frequency (CLKIN)
FEC[2:0] = 001 (forward FEC)
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
f_CLKIN
255/238 FEC Scaling
18.142 — 20.239
36.284 — 40.478 MHz
72.568 — 80.955
145.13 — 161.91
290.27 — 323.82
580.54 — 647.64
Input Clock Frequency (CLKIN)
FEC[2:0] = 010 (reverse FEC)
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
f_CLKIN
238/255 FEC Scaling
20.826 — 23.234
41.652 — 46.465 MHz
83.305 — 92.934
166.61 — 185.87
333.22 — 371.74
666.44 — 743.47
Input Clock Frequency (CLKIN)
FEC[2:0] = 100 (forward FEC)
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
f_CLKIN
255/237 FEC Scaling
Minimum input frequency
is in the 155 MHz range
N/A
N/A
N/A
144.52
289.05
578.11
N/A
N/A
N/A
N/A MHz
N/A
N/A
— 161.23
— 322.46
— 644.92
Input Clock Frequency (CLKIN)
FEC[2:0] = 101 (reverse FEC)
INFRQSEL[2:0] = 001
INFRQSEL[2:0] = 010
INFRQSEL[2:0] = 011
INFRQSEL[2:0] = 100
INFRQSEL[2:0] = 101
INFRQSEL[2:0] = 110
f_CLKIN
237/255 FEC Scaling
Minimum input frequency
is in the 155 MHz range
N/A
N/A
N/A
167.31
334.62
669.25
N/A
N/A
N/A
N/A MHz
N/A
N/A
— 186.66
— 373.31
— 746.61
Note: The Si5321 provides a 1/32x, 1/16x, 1/8x, 1/4x, 1/2x, 1x, 2x, 4x, 8x, 16x, 32x, 64x, or 128x clock multiplication function
with an option for additional frequency scaling by a factor of 255/238, 238/255, 255/237, 237/255, 66/64, or 64/66 for
FEC rate conversion.
Rev. 2.3
7