Skyworks Si5332-AM1 - User Manual

Si5332-AM1/2/3 Automotive Grade Device
Reference Manual
The Si5332-AM1/2/3 is a family of high-performance, low-jitter clock generators capable
of synthesizing five independent banks of user-programmable clock frequencies up to
333.33 MHz, while providing up to 12 differential or 24 single-ended output clocks.
The Si5332 supports free run operation using an external crystal as well as lock to an
external clock signal. The output drivers are configurable to support common signal for-
mats, such as LVPECL, LVDS, HCSL, and LVCMOS. Separate output supply pins allow
supply voltages of 3.3 V, 2.5 V, 1.8 V and 1.5 V (CMOS only) to power the multi-format
output drivers. The core voltage supply (VDD) accepts 3.3 V, 2.5 V, or 1.8 V and is inde-
pendent from the output supplies (VDDOs). Using its two-stage synthesis architecture
and patented high-resolution Multisynth technology, the Si5332 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
÷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
10-250 MHz
10-250 MHz
10-312.5 MHz
10-312.5 MHz
10-312.5 MHz
10-312.5 MHz
10-312.5 MHz
1-63
10-50 MHz
10-250 MHz
10-250 MHz
10-250 MHz
10-30 MHz
VDD_XTAL
VDDA
VDDOA
VDDOB
VDDOC
VDDOD
VDDOE
XA/CLKIN_1
XB
CLKIN_2
nCLKIN_2
CLKIN_3
nCLKIN_3
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
OUT10
OUT11
RELATED DOCUMENTS
• Any-Frequency 6/8/12-output
programmable clock generators
• Offered in three different package sizes,
supporting different combinations of output
clocks and user configurable hardware
input pins
• 32-pin QFN, up to 6 outputs
• 40-pin QFN, up to 8 outputs
• 48-pin QFN, up to 12 outputs
• Multisynth technology enables any
frequency synthesis on any output up to
250 MHz using N dividers.
• Output frequencies up to 333.33 MHz
using O dividers.
• Highly configurable output path featuring a
cross point mux
• Up to three independent fractional
synthesis output paths
• Up to five independent integer dividers
• Down and center spread spectrum
• Input frequency range:
• External crystal: 16 MHz to 50 MHz
• Differential clock: 10 MHz to 250 MHz
• LVCMOS clock: 10 MHz to 170 MHz
• Output frequency range:
• Differential: 5 MHz to 333.33 MHz
• LVCMOS: 5 MHz to 170 MHz
• User-configurable clock output signal
format per output: LVDS, LVPECL, HCSL,
LVCMOS
• Easy device configuration using our
ClockBuilder Pro™ (CBPro™) software
tool available for download from our web
site
• Temperature range: –40 to +105 °C
• Pb-free, RoHS-6 compliant
• For more information, refer to the Si5332
Automotive Grade Data Sheet
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
1 Rev. 0.3 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • July 26, 2021 1

Summary

1. Overview of Si5332 Automotive Grade Device

2. Power Supply Sequencing for Si5332

3. Input Clocks for Si5332

3.1 Input Clock Terminations

Details on connecting external crystals and single-ended/differential clock sources.

3.2 Calculating Crystal Loading Capacitance

Guidance on calculating and setting crystal loading capacitance using internal variable capacitors.

4. GPIO Pin Functions for Si5332

5. Output Clock Terminations

5.1 DC-Coupled Output Clock Terminations

Configuration options and diagrams for DC-coupled output clock terminations.

5.2 AC-Coupled Output Clock Terminations

Configuration options and diagrams for AC-coupled output clock terminations.

6. Programming the Volatile Memory (Registers)

6.1 Programming the PLL

Constraints and equations for programming the Phase-Locked Loop (PLL).

6.2 Programming the Clock Path

Setting up output mux clock sources and programming divider values.

6.3 Programming the Output Clock Frequency

Mapping divider values to register fields for output frequency configuration.

6.4 Programming the Output Clock Format

Tables defining driver setup options and driver mode configurations.

6.5 Programming for Frequency Select Operations

Using bank A/B dividers and control bits for frequency selection.

6.6 Programming Spread Spectrum

Configuration of spread spectrum clocking (SSC) on Multisynth outputs.

7. Si5332 Pinout and Package Variant

8. Recommended Schematic and Layout Practices

9. Si5332 Common Registers

10. Si5332 32-QFN Specific Registers

11. Si5332 40-QFN Specific Registers

12. Si5332 48-QFN Specific Registers

13. Revision History

Skyworks Si5332-AM1 Specifications

General

Brand	Skyworks
Model	Si5332-AM1
Category	Clock
Language	English