SI5338 Datasheet, PDF (160/170 Pages) Silicon Laboratories – I2C-PROGRAMMABLE ANY-FREQUENCY, ANY-OUTPUT QUAD CLOCK GENERATOR

Si5338
7. Pin Descriptions
Top View
24 23 22 21 20 19
IN1 1
18 CLK1A
IN2 2
17 _CLK1B
IN3 3
IN4 4
GPGNaNdDD
16 VDDO1
15 VDDO2
IN5 ⁵
14 CLK2A
IN6 ⁶
13 _CLK2B
7 8 9 10 11 12
Note: Center pad must be tied to GND for normal operation.
Table 17. Si5338 Pin Descriptions
Pin # Pin Name
1,2
IN1/IN2
I/O Signal Type
Description
CLKIN/CLKINB.
These pins are used as the main differential clock input or as the
XTAL input. See "3.2. Input Stage" on page 17, Figure 3 and
Figure 4, for connection details. Clock inputs to these pins must be
I
Multi
ac-coupled. Keep the traces from pins 1,2 to the crystal as short as
possible and keep other signals and radiating sources away from
the crystal.
When not in use, leave IN1 unconnected and IN2 connected to
GND.
160
Rev. 0.6