SI5332C-C-GM3R View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

MFG CO.

SI5332C-C-GM3R

6/8/12-Output Any-Frequency Clock Generator

Silicon Laboratories 

Si5332 Data Sheet

Functional Description

Output Enable

A universal hardware input pin can be defined to control output enable of a differential output, a bank of differential outputs, or as a

global output enable pin controlling all outputs. Upon de-assertion of an OE pin, the corresponding output will be disabled within 2-6

clock cycles. Asserting an OE pin from disable to enable will take <20 µs for the output to have a clean clock. OE pins have program-

mable 100 kΩ pull-up/pull-down or no pull resistors setting

The disable state is programmable as 0, 1, Hi-Z, or free running. See the Si5332 Family Reference Manual for details.

Output enabled/disabled for LVCMOS are done in pairs. Each differential buffer True and Compliment output can generate an

LVCMOS clock and the OE pin associated with the True and Compliment output buffer will control the respective LVCMOS pair.

For example: If DIFF0 is configured to be SE1 and DIFF0# is configured to be SE2 and OE1 is the associated OE pin, de-asserting the

OE1 pin will disable both SE1 and SE2 outputs. The disable and enable of the outputs to a known state is glitch free.

I2C Address Pin

This pin sets the LSB of the I2C address. For example, if the I2C address is A6h, setting this pin high will set the I2C address to A7h.

CLKIN_SEL[0:1] Pins

These pins are used to set the input source clock between the input clock channels (Crystal, CLKIN_2/CLKIN_2# or CLKIN_3/

CLKIN_3#). Upon switching the input clock source, the output will not be glitch free. It is intended for the user to set this pin to a known

state before the system is powered up or have the receiver address any unintended output signals when switching to a different input

source clock. This pin has an internal 50 kΩ internal pull-up or pull-down at all times.

3.8 Custom Factory Pre-programmed Parts

Custom pre-programmed parts can be ordered corresponding to a specific configuration file generated using the ClockBuilder Pro soft-

ware utility. Silicon Labs writes the configuration file into the device prior to shipping. Use the ClockBuilder Pro custom part number

wizard (http://www.silabs.com/clockbuilderpro) to quickly and easily generate a custom part number for your ClockBuilder Pro configu-

ration file. A factory pre-programmed part will generate clocks at power-up.

In less than three minutes, you will be able to generate a custom part number with a detailed data sheet addendum matching your

design’s configuration. Once you receive the confirmation email with the data sheet addendum, simply place an order with your local

Silicon Labs sales representative. Samples of your pre-programmed device will ship within two weeks.

3.9 I2C Serial Interface

The Si5332 is fully compliant to rev6 of the I2C specification, including Standard, Fast, and Fast+ modes.

Configuration and operation of the Si5332 can be controlled by reading and writing registers using the I2C . Communication with a 1.8 V

to 3.3 V host is supported. See the Si5332 Family Reference Manual for details.

3.10 In-Circuit Programming

The Si5332 is fully configurable using the I2C serial interface. At power-up the device downloads its default register values from internal

non-volatile memory (NVM). Refer to the Si5332 Family Reference Manual for a detailed procedure for writing registers to volatile mem-

ory.

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