SI5355 Datasheet, PDF (14/22 Pages) Silicon Laboratories – ANY-FREQUENCY 1–200 MHZ QUAD FREQUENCY 8-OUTPUT CLOCK GENERATOR

Si5355
4. Pin Descriptions
Top View
24 23 22 21 20 19
XA 1
18 _CLK2
XB 2
17 _CLK3
P1 ³
CLKIN 4
GGNNDD
16 _VDDOB
15 _VDDOC
P4 ⁵
14 _CLK4
P5 ⁶
13 _CLK5
7
8
9 10 11 12
Note: Center pad must be tied to GND for normal operation.
Table 11. Si5355 Pin Descriptions
Pin # Pin Name I/O
Description
1
XA
I External Crystal.
If a 25 or 27 MHz crystal is used as the device frequency reference, connect it across
XA and XB. If an input clock is used on pin 4, this pin should be tied to GND.
2
XB
I External Crystal.
If a 25 or 27 MHz crystal is used as the device frequency reference, connect it across
XA and XB. If an input clock is used on pin 4, this pin should be tied to GND.
3
P1
I Multi-Function Input (3.3 V Tolerant).
This pin functions as a multi-function input pin. The pin function (OEB_ALL, OEB_A,
OEB_B, OEB_C, OEB_D, or Reset) is user-selectable at time of configuration using the
ClockBuilder configuration utility.
4
CLKIN
I Single-Ended Input Clock.
If a single-ended clock is used as the device frequency reference, connect it to this pin.
This pin functions as a high-impedance input for CMOS clock signals. The input should
be dc coupled. If a crystal is used as the device frequency reference, this pin should be
tied to GND.
14
Rev. 1.1