SI5369 Datasheet, PDF (74/84 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

Si5369
Table 10. Si5369 Pin Descriptions (Continued)
Pin #
Pin Name I/O Signal Level
Description
5, 6, 15, 27,
V_DD
62, 63, 76,
Vdd Supply V_DD.
The device operates from a 1.8, 2.5, or 3.3 V supply. Bypass
79, 81, 84,
86, 89, 91,
94, 96, 99,
100
capacitors should be associated with the following V_DD pins:
Pins
Bypass Cap
5, 6
0.1 µF
15
0.1 µF
27
0.1 µF
62, 63
0.1 µF
76, 79
1.0 µF
81, 84
0.1 µF
86, 89
0.1 µF
91, 94
0.1 µF
96, 99, 100 0.1 µF
7, 8, 14, 18,
GND
GND Supply Ground.
19, 21, 26,
This pin must be connected to system ground. Minimize the
28, 31, 33,
ground path impedance for optimal performance.
36, 38, 41,
43, 46, 54,
55, 64, 65
9
C1B
O LVCMOS CKIN1 Invalid Indicator.
This pin performs the CK1_BAD function if CK1_BAD_PIN = 1
and is tristated if CK1_BAD_PIN = 0. Active polarity is con-
trolled by CK_BAD_POL.
0 = No alarm on CKIN1.
1 = Alarm on CKIN1.
10
C2B
O LVCMOS CKIN2 Invalid Indicator.
This pin performs the CK2_BAD function if CK2_BAD_PIN = 1
and is tristated if CK2_BAD_PIN = 0. Active polarity is con-
trolled by CK_BAD_POL.
0 = No alarm on CKIN2.
1 = Alarm on CKIN2.
11
C3B
O LVCMOS CKIN3 Invalid Indicator.
This pin performs the CK3_BAD function if CK3_BAD_PIN = 1
and is tristated if CK3_BAD_PIN = 0. Active polarity is con-
trolled by CK_BAD_POL.
0 = No alarm on CKIN3.
1 = Alarm on CKIN3.
12
INT_ALM O LVCMOS Interrupt/Alarm Output Indicator.
This pin functions as a maskable interrupt output with active
polarity controlled by the INT_POL register bit. The INT output
function can be turned off by setting INT_PIN = 0. If the ALR-
MOUT function is desired instead on this pin, set
ALRMOUT_PIN = 1 and INT_PIN = 0.
0 = ALRMOUT not active.
1 = ALRMOUT active.
The active polarity is controlled by CK_BAD_POL. If no function
is selected, the pin tristates.
Note: Internal register names are indicated by underlined italics, e.g., INT_PIN. See Si5369 Register Map.
74
Rev. 1.0