si5351 Silicon Laboratories, si5351 Datasheet - Page 37

• Manufacturer Part Number: si5351
• Description: Si5350a Factory-programmable Cmos Clock Generator
• Manufacturer: Silicon Laboratories

13. Si5351C Pin Descriptions (20-Pin QFN, 24-Pin QSOP)
*Note: I = Input, O = Output, P = Power
*Note: Input pins are not internally pulled up
Pin Name
VDDOC
VDDOD
VDDOA
VDDOB
CLKIN
CLK0
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
INTR
GND
OEB
VDD
SCL
SDA
XA
XB
Center Pad
20-QFN
INTR
SDA
SCL
XA
XB
13
12
19
17
16
15
20
10
18
14
11
1
2
9
8
3
4
5
6
7
Pin Number
1
5
2
3
4
Si5351C 20-QFN
Top View
5, 8, 17, 19
GND
PAD
24-QSOP
21
20
15
14
24
23
10
12
13
18
16
22
11
6
7
3
1
9
4
2
15
14
13
12
11
CLK7
VDDOD
CLK1
VDDOA
CLK0
Pin Type*
I/O
O
O
O
O
O
O
O
O
O
P
P
P
P
P
P
I
I
I
I
I
Input pin for external crystal.
Input pin for external crystal.
Output clock 0.
Output clock 1.
Output clock 2.
Output clock 3.
Output clock 4.
Output clock 5.
Output clock 6.
Output clock 7.
Interrupt pin. High = interrupt active.
I
I
PLL clock input.
Output driver enable. Low = enabled, High = disabled.
Core voltage supply pin
Output voltage supply pin for CLK0 and CLK1. See 6.2
Output voltage supply pin for CLK2 and CLK3. See 6.2
Output voltage supply pin for CLK4 and CLK5. See 6.2
Output voltage supply pin for CLK6 and CLK7. See 6.2
Ground.
Rev. 0.1
2
2
C bus serial clock input. Pull-up to VDD core with 1 k
C bus serial data input. Pull-up to VDD core with 1 k
VDDOC
CLKIN
CLK5
CLK4
INTR
GND
GND
VDD
SDA
SCL
XA
XB
Si5351C 20-QSOP
1
2
3
4
5
6
7
8
9
10
11
12
Function
Top View
Si5351A/B/C
24
23
22
21
20
19
18
17
16
15
14
13
CLK6
CLK7
VDD0D
CLK0
CLK1
GND
VDDOA
GND
VDD0B
CLK2
CLK3
OEB
37