Electronics Technology


Differential clock distribution ICs

19 August 2009 Electronics Technology

Lattice Semiconductor has released its ispClock5400D family of differential clock distribution ICs, featuring the CleanClock ultra low phase noise PLL. The family currently consists of the six-output 5406D and 10-output 5410D.

The FlexiClock output section of the devices supports multiple logic standards and dual skew control features. The configuration of each device is held in on-chip non-volatile memory that is reprogrammable through a JTAG interface. Certain aspects of the device can be modified on the fly via an I²C interface. Design for the devices is supported in the Lattice PAC-Designer software tool.

Typical applications that can benefit from the ispClock5400D devices include supplying high quality reference clocks to high speed serialised communication ICs that use SERDES technology, and the consolidation of components, such as fan-out buffers and zero-delay buffers, typically used for distributing high frequency clocks in a circuit board.

The CleanClock PLL includes an on-chip programmable analog filter and a programmable VCO with input clock frequencies up to 400 MHz. The PAC-Designer software tool automatically determines the parameters of the PLL depending on the input and output clock frequencies. This wideband CleanClock PLL is compatible with the Spreadspectrum clocks required for distributing PCI Express and SATA clocks. The phase noise of the PLL is low enough to be suitable for sourcing clocks to SERDES chips.

The devices provide in-system programmable FlexiClock differential outputs. Each output can be configured to interface with a number of logic standards such as LVDS, MLVDS, HCSL, LVPECL, HSTL and SSTL. The output clock can be individually skewed using the phase angle and time skew mechanisms. In addition, the skew can be changed dynamically in-system through an I²C interface.



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Smallest automotive maXTouch controllers
29 July 2020, Altron Arrow, Avnet South Africa , DSP, Micros & Memory
To help enhance and ease today’s driving experience, automotive manufacturers are implementing additional touch displays beyond the centre infotainment display (CID). Supporting the application of these ...

Read more...
MOSFET half-bridge power stage
30 June 2020, Altron Arrow , Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...

Read more...
Cypress ships one billionth USB-C device
30 June 2020, Altron Arrow , News
Cypress, an Infineon Technologies company, announced that in less than five years, the company has achieved a landmark milestone by shipping its one billionth USB-C device. As the leading provider of ...

Read more...
18 V synchronous buck converters
30 June 2020, Altron Arrow , Power Electronics / Power Management
Suitable for consumer and industrial applications, Diodes Incorporated announced the AP62xxx family of high-efficiency synchronous step-down DC-DC converters including the AP62250 (2,5 A), AP62300 (3 A), ...

Read more...
MOSFET half-bridge power stage
30 June 2020, Altron Arrow , Power Electronics / Power Management
Vishay Intertechnology introduced a new 30 V n-channel MOSFET half-bridge power stage that combines a high-side TrenchFET MOSFET and low-side SkyFET MOSFET with integrated Schottky diode in one compact ...

Read more...
Video Reel: Microchip’s SAM L11
30 June 2020, Altron Arrow , Multimedia, Videos
This video (www.dataweek.co.za/*jun20-sam) provides a brief overview of Microchip Technology’s SAM L11 comprehensive security solution framework and demos to make implementation of security simple. Microchip’s ...

Read more...
Dual-core wireless MCU
30 June 2020, Altron Arrow , Telecoms, Datacoms, Wireless, IoT
The STM32WBx0 is a dual-core wireless MCU based on an Arm Cortex-M4 core running at 64 MHz (application processor) and an Arm Cortex-M0+ core at 32 MHz (network processor). The STM32WBx0 Value Line ...

Read more...
What’s in your healthcare monitor?
29 July 2020, Altron Arrow , Power Electronics / Power Management
System designers of portable and wireless medical monitoring devices used for in-home patient health monitoring purposes face daunting design challenges such as thermally- and space-constrained enclosures, as well as being able to transmit data without interference or interruption.

Read more...
A social distancing solution for workplaces
29 July 2020, Altron Arrow , Telecoms, Datacoms, Wireless, IoT
As South Africa gradually eases lockdown to resuscitate the economy after a hard lockdown that lasted for more than 10 weeks, there is a need to facilitate people returning to work safely. Apart from ...

Read more...
Low-voltage automotive buck converter
29 July 2020, Altron Arrow , Power Electronics / Power Management
Diodes Incorporated announced the AP61100Q, a 5,5 V, 1 A continuous output current, automotive-compliant, synchronous buck converter for point of load (POL) applications. With a fully integrated 110 mΩ ...

Read more...