SI5365 Datasheet, PDF (9/18 Pages) Silicon Laboratories – PIN-PROGRAMMABLE PRECISION CLOCK MULTIPLIER

Si5365
Pin #
12
13
57
Table 3. Si5365 Pin Descriptions (Continued)
Pin Name I/O Signal Level
Description
ALRMOUT O
LVCMOS
Alarm Output Indicator.
This pin is an active high alarm output associated with CKIN4 or the
frame sync alignment alarm.
0 = ALRMOUT not active.
1 = ALRMOUT active.
CS0_C3A I/O
CS1_C4A
LVCMOS Input Clock Select/CKINn Active Clock Indicator.
If manual clock selection mode is chosen (AUTOSEL = 1), the CS[1:0]
pins function as the manual input clock selector control.
CS[1:0]
Active Input Clock
00
CKIN1
01
CKIN2
10
CKIN3
11
CKIN4
22 AUTOSEL I
29
CKIN4+ I
30
CKIN4–
34
CKIN2+ I
35
CKIN2–
37 DBL2_BY I
39
CKIN3+ I
40
CKIN3–
44
CKIN1+ I
45
CKIN1–
3-Level
MULTI
MULTI
3-Level
MULTI
MULTI
These inputs are internally deglitched to prevent inadvertent clock
switching during changes in the CSn input state.
If automatic clock detection is chosen (AUTOSEL = M or H), these pins
function as the CKINn active clock indicator output.
0 = CKINn is not the active input clock.
1 = CKINn is currently the active input clock to the PLL.
This pin has a weak pull-down.
Manual/Automatic Clock Selection.
Three level input that selects the method of input clock selection to be
used.
L = Manual.
M = Automatic non-revertive.
H = Automatic revertive.
Clock Input 4.
Differential clock input. This input can also be driven with a single-ended
signal.
Clock Input 2.
Differential input clock. This input can also be driven with a single-ended
signal.
CKOUT2 Disable/PLL Bypass Mode Control.
Controls enable of CKOUT2 divider/output buffer path and PLL bypass
mode.
L = CKOUT2 Enabled.
M = CKOUT2 Disabled.
H = BYPASS Mode with CKOUT2 enabled.
Clock Input 3.
Differential clock input. This input can also be driven with a single-ended
signal.
Clock Input 1.
Differential clock input. This input can also be driven with a single-ended
signal.
Preliminary Rev. 0.34
9