Datasheet

Si5351A/B/C-B
Rev. 1.0 27
9.3. Si5351C 20-Pin QFN
Table 13. Si5351C Pin Descriptions
Pin Name
Pin
Number
Pin Type
1
Function
20-QFN
XA 1 I Input pin for external crystal.
XB 2 I Input pin for external crystal.
CLK0 13 O Output clock 0.
CLK1 12 O Output clock 1.
CLK2 9 O Output clock 2.
CLK3 8 O Output clock 3.
CLK4 19 O Output clock 4.
CLK5 17 O Output clock 5.
CLK6 16 O Output clock 6.
CLK7 15 O Output clock 7.
INTR 3 O Interrupt pin. Open drain active low output, requires a pull-up
resistor greater than 1 k
SCL 4 I I
2
C bus serial clock input. Pull-up to VDD core with 1 k
SDA 5 I/O I
2
C bus serial data input. Pull-up to VDD core with 1 k
CLKIN 6 I PLL clock input.
OEB 7 I Output driver enable. Low = enabled, High = disabled.
VDD 20 P Core voltage supply pin
VDDOA 11 P Output voltage supply pin for CLK0 and CLK1. See 6.2
VDDOB 10 P Output voltage supply pin for CLK2 and CLK3. See 6.2
VDDOC 18 P Output voltage supply pin for CLK4 and CLK5. See 6.2
VDDOD 14 P Output voltage supply pin for CLK6 and CLK7. See 6.2
GND Center Pad P Ground.
Notes:
1.
I = Input, O = Output, P = Power.
2. Input pins are not internally pulled up.
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
20
19
18
17
16
XA
XB
INTR
SCL
SDA
OEB
CLK3
CLK2
VDDOB
CLKIN
GND
PAD
CLK6
CLK5
VDDOC
CLK4
VDD
VDDOA
CLK1
CLK0
VDDOD
CLK7