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Si5357 Reference Manual
The Si5357 is a high-performance, low-jitter clock generator capable of synthesizing
five independent banks of user-programmable clock frequencies up to 312.5 MHz. The
device supports free run operation using an external crystal, or it can lock to an external
clock signal. The output drivers support up to twelve LVCMOS clocks. Separate output
supply pins allow supply voltages of 3.3, 2.5, 1.8 V and 1.5 V to power the output driv-
ers. The core voltage supply (VDD) accepts 3.3, 2.5,or 1.8 V and is independent from
the output supplies (VDDOs). Using its two-stage synthesis architecture and patented
high-resolution Multisynth technology, the Si5357 can generate three fully independent /
non-harmonically-related bank frequencies from a single input frequency.
÷ P
PFD
LF
÷M
n
/M
d
÷R
÷R
÷R
÷R
÷R
÷R
÷N
0
÷N
1
÷O
0
÷O
1
÷O
2
÷O
3
÷O
4
1-31
10-255
10-50 MHz
2.375-2.625 GHz
10-255
8-255
10-170 MHz
10-170 MHz
10-170 MHz
10-170 MHz
10-170 MHz
10-170 MHz
10-170 MHz
1-63
10-50 MHz
10-170 MHz
10-170 MHz
10-30 MHz
VDD_XTAL
VDDA
VDDOA
VDDOB
VDDOC
VDDOD
VDDOE
XA/CLKIN_1
XB
CLKIN_2
nCLKIN_2
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
KEY FEATURES
• Any-Frequency 12-output programmable
clock generator
• Offered in 32-pin QFN package
• Multisynth technology enables any
frequency synthesis on any output up to
170 MHz
• Highly configurable output path featuring a
cross point mux
• Up to three independent fractional
synthesis output paths
• Up to five independent integer dividers
• Embedded 50 MHz crystal option
• Input frequency range:
• External crystal: 16 to 50 MHz
• Differential clock: 10 to 170 MHz
• LVCMOS clock: 10 to 170 MHz
• Output frequency range:
• LVCMOS: 5 to 170 MHz
• Temperature range: –40 to +85 °C
• Pb-free, RoHS-6 compliant
• For more information, refer to the
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
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Rev. 0.2 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021
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