SI53313 Datasheet, PDF (1/33 Pages) Silicon Laboratories – DUAL 1:5 LOW-JITTER, ANY-FORMAT BUFFER/LEVEL TRANSLATOR

Si53313
DUAL 1:5 LOW-JITTER, ANY-FORMAT BUFFER/LEVEL
TRANSLATOR (<1.25 GHZ)
Features
 2 independent banks of 5x
 Output clock division: /1, /2, /4 (dc to
differential outputs
725 MHz for /2 and /4)
 Ultra-low additive jitter: 45 fs rms
 Wide frequency range:
 Independent V_DD and V_DDO:
1.8/2.5/3.3 V
dc to 1.25 GHz
 Excellent power supply noise
 Any-format input with pin selectable rejection (PSRR)
output formats: LVPECL, Low Power _{ Small size: 44-QFN (7 mm x 7 mm)}
LVPECL, LVDS, CML, HCSL,
 RoHS compliant, Pb-free
LVCMOS
 Industrial temperature range:
 Asynchronous output enable
–40 to +85 °C
 Low output-output skew: <70 ps
Applications
 High-speed clock distribution
 Ethernet switch/router
 Optical Transport Network (OTN)
 SONET/SDH
 PCI Express Gen 1/2/3
 Storage
 Telecom
 Industrial
 Servers
 Backplane clock distribution
Ordering Information:
See page 27.
Pin Assignments
Si53313
Description
DIVA 1
33 DIVB
The Si53313 is an ultra low jitter dual 1:5 differential buffer with pin-selectable
SFOUTA[1] 2
SFOUTA[0] 3
32 _SFOUTB[1]
31 _SFOUTB[0]
output clock signal format and divider selection. The Si53313 utilizes Silicon
Q2 4
30 _Q7
Laboratories' advanced CMOS technology to fanout clocks from dc to 1.25 GHz
with guaranteed low additive jitter, low skew, and low propagation delay variability.
Q2 ⁵
GND 6
Q1 7
GND
PAD
29 Q7
28 NC
27 Q8
The Si53313 features minimal cross-talk and provides superior supply noise
Q1 8
Q0 ⁹
26 Q8
25 Q9
rejection, simplifying low jitter clock distribution in noisy environments.
Q0 ¹⁰
24 Q9
Independent core and output bank supply pins provide integrated level translation
NC 11
23 _NC
without the need for external circuitry.
Functional Block Diagram
Patents pending
VREF
CLK0
CLK0
Vref
Generator
Power
Supply
Filtering
DivA
DIVA
VDDOA
SFOUTA[1:0]
OEA
Q0, Q1, Q2, Q3, Q4
Q0, Q1, Q2, Q3, Q 4
CLK1
CLK1
DivB
DIVB
VDDOB
SFOUTB[1:0]
OEB
Q5, Q 6, Q7, Q8, Q9
Q5, Q6, Q7, Q8, Q9
Rev. 1.0 12/15
Copyright © 2015 by Silicon Laboratories
Si53313