Si5344H/42H Rev D HIGH-FREQUENCY, ULTRA-LOW JITTER ATTENUATOR CLOCK WITH DIGITALLY-CONTROLLED OSCILLATOR Features High-speed outputs generate an Hitless input clock switching: ultra-low jitter output up to 2.75 GHz automatic or manual Up to four Multi-Synth outputs Automatic free-run and holdover generate any frequency up to modes 717.5 MHz Glitchless on the fly output Input frequency range: frequency changes 8 kHz to 750 MHz Locks to gapped clock inputs Maximum Output frequency: DCO mode: as low as 0.001 ppb steps. High-Frequency Mode: 2.75 GHz Core voltage MultiSynth Mode: 717.5 MHz V : 1.8 V 5% Jitter performance: DD High Frequency Mode: V : 3.3 V 5% DDA Ordering Information: <50 fs typ (1 MHz40 MHz) Independent output supply pins: See Section 7. MultiSynth Mode: 3.3V, 2.5V, or 1.8V <150 fs typ (12 kHz20 MHz) 2 Serial interface: I C or SPI Pin Assignments Programmable jitter attenuation In-circuit programmable with bandwidth: 10 Hz to 4 kHz non-volatile OTP memory Highly configurable outputs TM Si5342H 44QFN ClockBuilder Pro software compatible with LVDS, LVPECL, Top View simplifies device configuration LVCMOS, CML, and HCSL with programmable voltage swing and Si5342H: 2 input, 2 output, QFN44 common mode Si5344H, 2 input, 4 output, QFN44 LVPECL-only in High Frequency Temperature range: 40 to +85 C IN1 1 33 INTR Mode IN1 2 32 VDD Pb-free, RoHS-6 compliant IN SEL0 3 31 LOS1 Status monitoring (LOS, OOF, LOL) X1 4 30 LOS0 XA 5 29 VDDS GND XB 6 28 LOS XAXB Applications Pad X2 7 27 LOL VDDS VDDA 8 26 25 OUT1 VDDA 9 100G/200G/400G Optical Wireless base-stations 10 24 NC OUT1 Transceivers 11 23 VDDO1 NC Description This specialized jitter attenuating clock multiplier combines fourth-generation DSPLL with ultra-low phase jitter and MultiSynth technologies to enable high Si5344H 44QFN Top View data rate coherent optical transceiver design. Up to four outputs can be assigned to High Frequency Mode capable of up to 2.75 GHz at 50 fs-rms typical phase jitter (1 MHz-40 MHz). Each output may also be configured as MultiSynth Mode any-frequency outputs when added frequency flexibility is required, such as clocking Forward Error Correction (FEC) while still delivering <150 fs-rms typical IN1 1 33 INTR IN1 2 32 VDD phase jitter (12 kHz-20 MHz). The Si5344H and Si5342H also feature DCO- IN SEL0 3 31 OUT2 control with as low as 0.001 ppb step control and locks to gapped clock inputs. 4 30 OUT2 XGND 5 29 VDDO2 XA GND These devices are programmable via a serial interface with in-circuit 6 28 LOS XAXB XB Pad XGND 7 27 LOL programmable non-volatile memory (NVM) so that they always power up with a VDDA 8 26 VDDS known frequency configuration. The loop filter is fully integrated on-chip 9 25 OUT1 VDDA 10 24 OUT1 NC eliminating the risk of potential noise coupling associated with discrete solutions. 11 23 VDDO1 NC Programming the Si5342H/44H is made easy with Skyworks Solutions ClockBuilder Pro software. Factory preprogrammed devices are also available. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice November 9, 2021 12 44 12 OE IN0 OE 44 IN0 SDA/SDIO 13 43 SDA/SDIO 13 43 IN0 IN0 SCLK 14 42 SCLK 14 42 NC NC A1/SDO 15 41 A1/SDO 15 41 NC NC 16 A0/CS 16 40 VDD A0/CS 40 VDD 17 39 RST 17 39 VDD RST VDD 18 38 VDDO0 18 38 I2C SEL VDDO0 I2C SEL OUT0 19 37 RSVD GND OUT0 19 37 IN SEL1 20 36 OUT0 NC OUT0 20 36 OUT3 VDD 21 35 NC 21 VDD 35 OUT3 22 34 VDDS 34 NC NC 22 VDDO3Si5344H/42H Rev D TABLE OF CONTENTS Section Page 1. Typical Application Schematic 3 2. Electrical Specifications .4 3. Typical Operating Characteristics 22 4. Functional Description .25 4.1. Frequency Configuration 25 4.2. DSPLL Loop Bandwidth 25 4.3. Modes of Operation 25 4.4. External Reference (XA/XB) .27 4.5. Digitally Controlled Oscillator (DCO) Mode 27 4.6. Inputs (IN0, IN1) 29 4.7. Fault Monitoring 31 4.8. Outputs .35 4.9. Power Management .39 4.10. In-Circuit Programming 39 4.11. Serial Interface 39 4.12. Custom Factory Preprogrammed Parts .39 4.13. Enabling Features and/or Configuration Settings Unavailable in ClockBuilder Pro for Factory Preprogrammed Devices .39 5. Register Map 41 5.1. Addressing Scheme .41 5.2. High-Level Register Map 41 6. Pin Descriptions .43 7. Ordering Guide 49 7.1. Ordering Part Number Fields 50 8. Package Outlines 51 8.1. 7x7 mm 44-QFN Package Diagram .51 9. PCB Land Pattern 52 10. Top Marking .53 11. Device Errata 54 Document Change List .55 Contact Information 56 2 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice November 9, 2021