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LMK61E07: HCSL Oscillator Recommendation

Izzy Lee
Prodigy 280 points
Part Number: LMK61E07
Other Parts Discussed in Thread: LMK6H

Hi team, 

I'm looking for the right clock generator or oscillator for the customer with HCSL low-jitter 400MHz output. Their looking for an oscillator for their SoC. I think LMK61E07 may fit their requirements but seems with too big footprint. Do we have any proper solution for this? Please refer to the requirements below.

Function

Pin Name

Pin Type

IO Level

Description

System Clock

REFCLK_p

REFCLK_n

HCSL Input

1.15V

Low-jitter 400MHz differential REFCLK input

This pin shall not contain spread-spectrum clocking(SSC)

Parameter

Symbol

Min

Typ

Max

Units

Output Frequency

 

 

400

 

MHz

Duty Cycle

 

40

50

60

%

Frequency Tolerance

 

-100

0

100

Ppm

Rise/Fall Time

 

 

100

400

pS

Single-Ended Voltage Limits

 

-0.3

 

1.2

V

Differential Swing

Vdiff

500

800

1500

mV

Input Common Mode

 

-0.3+Vdiff/4

 

1.2-Vdiff/4

V

Clock Source Output DC Impedance

 

40

 

60

Ohm

Narrowband Jitter (12kHz to 20Mhz)

 

 

 

 

 
  • +1
    TI__Genius 11960 points

    Hi Izzy, 

    The LMK6H will most likely be the best solution for this application. It's available in either a DLE(3.2 mm x 2.5 mm) or DLF (2.5 mm x 2.0 mm) package and can meet +- 25 ppm frequency stability. The only other standalone oscillator we currently produce that can output 400 MHz HCSL is the LMK61E07/E08, but as you mentioned it comes in a larger package size. The LMK6H is planned to launch in Q1 2023, although we do not have a confirmed release date for the 400 MHz variant yet.

    We can continue our discussion about sample availability via email. 

    Regards, 

    Connor