SL2309
Low Jitter and Skew 10 to 140 MHz Zero Delay Buffer (ZDB)
Key Features
10 to 140 MHz operating frequency range
Low output clock skew: 50ps-typ
Low output clock jitter:
50 ps-typ cycle-to-cycle jitter
Low part-to-part output skew: 150 ps-typ
3.3 V power supply range
Low power dissipation:
28 mA-max at 66 MHz
44 mA –max at 140 MHz
One input drives 9 outputs organized as 4+4+1
Select mode to bypass PLL or tri-state outputs
SpreadThru™ PLL that allows use of SSCG
Standard and High-Drive options
Available in 16-pin SOIC and TSSOP packages
Available in Commercial and Industrial grades
Description
The SL2309 is a low skew, low jitter and low power Zero
Delay Buffer (ZDB) designed to produce up to nine (9)
clock outputs from one (1) reference input clock, for high
speed clock distribution applications.
The product has an on-chip PLL which locks to the input
clock at CLKIN and receives its feedback internally from
the CLKOUT pin.
The SL2309 has two (2) clock driver banks each with four
(4) clock outputs. These outputs are controlled by two (2)
select input pins S1 and S2. When only four (4) outputs
are needed, four (4) bank-B output clock buffers can be tri-
stated to reduce power dissipation and jitter. The select
inputs can also be used to tri-state both banks A and B or
drive them directly from the input bypassing the PLL and
making the product behave like a Non-Zero Delay Buffer
(NZDB).
The high-drive (-1H) version operates up to 140MHz and
low drive (-1) version operates up to 100MHz at 3.3V.
Applications
Printers and MFPs
Digital Copiers
PCs and Work Stations
DTV
Routers, Switchers and Servers
Digital Embeded Systems
Benefits
Up to nine (9) distribution of input clock
Standard and High-Dirive levels to control impedance
level, frequency range and EMI
Low power dissipation, jitter and skew
Low cost
Block Diagram
Low Pow er and
Low Jitter
P LL
C LKIN
MUX
CLK OU T
CLK A1
CLK A2
C LKA3
CLKA4
S2
Input Selection
Decoding Logic
S1
CLKB1
C LKB2
C LKB3
2
2
C LKB4
VD D
GN D
Rev 1.1, May 29, 2007
Page 1 of 12
2200 Laurelwood Road, Santa Clara, CA 95054 Tel: (408) 855-0555 Fax: (408) 855-0550 www.SpectraLinear.com
SPECTRALINEAR [ SPECTRALINEAR INC ]
