The document outlines IDT's ultra-low-power PCI Express (PCIe) clocking solutions for generations 1-3, showcasing products such as clock generators, buffers, and multiplexers designed for reduced power consumption and high integration. It highlights key features including low operating voltage, minimal power usage, and compact packaging suitable for applications in cloud computing, solid-state drives, and instrumentation. Additionally, it provides information on compatibility, availability, and the potential cost savings associated with using these new devices.

1. Ultra-Low-Power (ULP) Clocking Solutions
for PCI Express Gen 1-2-3
IDT 9DBVxxxx and 9FGVxxxx
August, 2012
Ron Wade
Technical Marketing Manger
Timing and Synchronization Division
Ron.Wade@idt.com
©2012 Integrated Device Technology, Inc.

2. PCI Express (PCIe) Clock Families
Decreasing Power Consumption
LP
ULP
www.IDT.co
PAGE 2

3. Ultra-Low-Power PCIe Clock Family
● IDT’s PCI Express clocks consist of three main functions:
● Clock Generators or Synthesizers
● Clock Buffers (Fan Out and Zero-Delay)
● Clock Multiplexers (with and without integrated Fan Out)
● Here is the decoder for the ULP PCIe family:
● 9FGV are clock generators (Frequency Generators)
● 9DBV are clock buffers (Differential Buffers)
● 9DMV are clock multiplexers (Differential Multiplexers)
● V indicates 1.8V operation
● The first two digits after the V indicate the number of outputs – 02, 04, 06, 09, 10, etc.
● The 31 series have external terminations
● The 41 series have internal terminations with a Zo = 100Ω
● The 51 series have internal terminations with a Zo = 85Ω
● Devices
with the same first 6 characters in the part number – 9FGV08xx are
pin compatible with each other – so 9FGV0831/41/51 are pin compatible
● The
9FGV and 9DBV devices with the same number of outputs share the
same pin out on the top, right and bottom of the device – the output side –
and have only minor differences on the input side.
●
Co-layout is possible and is fairly easy.
www.IDT.co
PAGE 3

4. Ultra-Low-Power PCIe Gen1-2-3 Clocks
● Buffers and clock generators
● Co-layout of buffers and clock
generators is possible
● 1.8V Operation
● Absolute lowest power
●2
to 8 Low-Power HCSL (LPHCSL) outputs:
●
●
Reduces IDDO from 15mA/output to
~5mA/output
Reduces or eliminates termination
resistors.
or SMBus selection
of key functions:
●
●
PLL operating mode (clock buffers)
Spread spectrum (clock generators)
● Selectable
SMBus addresses on
most devices
●
www.IDT.co
Easy use of multiple devices without
extra logic
PAGE 4
Status
PreProduction
Availability
Samples? Yes
Production
● Pin-selection
Sept. 30, 2012

5. Packaging & Typical Application Diagram
● Embedded/Communications
●
●
●
Adapter
Performance requirements are driving a transition from PCIe Gen 2 to Gen3
Board real estate is very tight due to growing functionality requirements
Power densities continue to grow, causing increased thermal concerns
PCIe IO
PCIe
PCIe
Switch
Switch
PCIe IO
Ultra Low
Ultra Low
Power
Power
PCIe Clock
PCIe Clock
CPU
Chipset
●
(4x4, 5x5 and 6x6 mm^2)
Yellow is package for old parts
●
White number is number of outputs
www.IDT.co
Memory
Embedded/Communications Adapter
Blue is package for new parts not
including termination resistors
●
Peripherals
PAGE 5

6. Key Applications
KEY APPLICATIONS
● Cloud
Computing/
Networking/Storage
● PCIe-based
Solid State Drives
● Instrumentation
● Multifunction
- PXI
Printers
● Anywhere
PCIe power/performance
is a concern
www.IDT.co
PAGE 6

7. Ultra-Low-Power PCIe Key Benefits
● Ultra-Low-Power consumption
● Less than 1/10th the power
consumption of existing devices
●
Ultra low operating costs
●
Save $0.45 per year in energy costs
per device*
● PCIe Gen1-2-3 support
● Design can be re-used through
several generations
● Small form factor
● 4x4 to 6x6 mm packages
9FG108 and 9FGV0831 8 o/p clock generators
● High integration
● Optional integrated source
terminations on LP-HCSL outputs
● Saves up to 16 resistors per device
● <1.5ps
RMS phase jitter on
REF output
Suitable for 1Gigabit Ethernet
applications
* 1W costs $0.86/year in electrical/cooling in typical data center applications
●
www.IDT.co
PAGE 7

8. Ultra-Low-Power PCIe Roadmap
www.IDT.co
PAGE 8

9. About the Ultra-Low-Power PCIe Family
● These
● All
devices are part of IDT’s PCIe Clocking Devices.
families offer PCIe Gen1-2-3 compliant devices.
9FGL LP
9DBL
9ZXL
ULP
557-xx
5V4106x
5V4123x
9FG
9DB
9ZX2
Power
Supply(ies)
3.3V
3.3V
3.3V Core
1.05V-3.3V O/P
1.8V Core
1.05V-1.8V O/P
Output Type
HCSL
HCSL
LP- HCSL
LP-HCSL
#Outputs
1-4
4-19
4-19
2-8 (initially)
REF output
No
Yes
No
Yes
Pin Counts
Packages
8-20
SOIC,
TSSOP,QF
N
28-72
TSSOP,
QFN
20-72
QFN
24-48
QFN
4 External
4 External
2 External or
0 External
2 External or
0 External
412mW
(4 O/P)
580mW
165mW
57mW
Term.
Resistors
(per Dif pair)
Power
(8 O/P Clock
Gen)
www.IDT.co
PAGE 9
9FGV
9DBV

10. 9FGV Family Clock Generator Features
www.IDT.co
PAGE 10

11. 9DBV Family Buffer Features
www.IDT.co
PAGE 11

12. Design Documentation
Visit www.idt.com for additional information
THANK YOU!
www.IDT.co
PAGE 12

13. Transcript
●
Hi, there. My name is Ron Wade, Technical Marketing Manager in the Timing and Synchronization Division of IDT. I'm going to give you a quick overview of our brand new ultra low power PCI
Express Timing Solutions family.
●
So, PCI Express can be thought of as having three generations of timing parts. The original technology was 3.3 volt HCSL output structure, which was developed in the early 2000's. For
comparison sake here I'm taking an eight output clock generator from each technology. You can see that in this case the 3.3 volt HCSL which is the yellow and black burns 580 milliwatts of
power to give you an eight output clock generator. In the mid 2000's, we developed a low-power HCSL output for use in notebook PC's, and normalizing to an eight output clock generator, that
technology was able to provide a reduced power consumption of 165 milliwatts. What we're introducing today is an ultra low power PCI Express family and again, an eight output clock
generator using the 9FGV or 9DBV devices which are the blue and white can give you that PCI Express Gen1, two, three clock generator for as little as 57 milliwatts. You can see that as we're
decreasing the power here significantly we're also still providing you with the PCI Express Gen1 to Gen2 to Gen3 capability.
●
So, the ultra low power PCI Express family consists of three main building blocks. There's the clock generators, there's the clock buffers, which are both fanout mode and zero delay, and the
clock multiplexers, which have a single output or they have integrated fanout. The ultra low power PCI Express family part numbers all kind of play together and hang together and once you
figure out the decoder ring, which is really simple here, you can kind of figure out what kind of part you need to plop into your design without any complicated selector guides. So, the FGV
parts for the clock generators, FG stands for frequency generator. The DBV parts are the clock buffers. DV stands for differential buffer. The DMV parts are the clock multiplexers, which
stands for differential multiplexers and the V indicates 1.8 volt operation. The first two digits are the V are the number of outputs, which currently range from two to eight, but will eventually
range from one to ten. The 31 series parts have external terminations. The 41 series parts have a 100 ohm differential output termination and the 51 series parts have an 85 ohm output
termination, to support the newer practices in PCI Express. So, devices with the first six characters in the part number say, 9FGV0831 or 41 or 51 are all compatible with each other except for
that difference in the output terminations. For parts that have the same number of outputs whether it's a buffer or a clock generator, the output side of the part is identical between them. So, an
831 clock generator and a 831 buffer, the top, the right side and the bottom of the parts are all the same pin out which makes it easy to switch from one to the other in co-layout.
●
So, the clocks as mentioned, the main functions are the buffers in the clock generators. These are 1.8 volt operation for the absolute lowest power consumption. We did do a lot of work to
actually reduce the current required and these devices do actually draw less current than the yellow and the green technology parts that I'd mentioned previously. So, again, the outputs are
two to eight today. They are low power HCSL which to the receiver looks exactly the same as the kind of legacy HCSL technology. The benefit here is that the current per output drops from 15
milliamps down to five and then we have the ability to integrate or have external the termination resistors. The other key thing we have is you may not have an SM bus handy and you don't
need an SM bus to control the basic functions of the parts. The clock generator, for instance, there's a spread enable pin that enables you to have not only spread off, but to have a quarter
percent down spread or half a percent down spread as a pin selection. Likewise, the buffers have a pin that allows you to select either high or low bandwidth or a bypass mode, which is a
fanout with the PLL, as the name implies, bypassed and turned off. Also, the device that synthesizers have, two selectable SM bus addresses so that you can use up to two of them on the
same segment. Most of the fanout buffers have three selectable SM bus addresses so that up to three of those devices can be used on the same SM bus segment and the buffers in the
synthesizer addresses do not overlap. It's very easy to have up to five of these devices on the same segment without any external logic. All the parts are pre-production right now, samples are
available now and will be in full production by the end of September.
●
A typical application for these is an embedded communications adapter where you've got a PCI Express switch, PCI Express IO, a CPU chip set or an FPGA and various peripherals in
memory and performance requirements are from Gen1 to Gen2, going to Gen3. These parts cover the whole gambit of that performance envelope. The other thing in these types of
applications as you cram more and more functionality in the same space as board real estate becomes very tight. Also, power densities continue to grow and as the power density grows, then
thermal concerns tend to show up as well. So, these parts are available in commercial and industrial temperature ranges. They have a very low thermal profile and they are very small
package-wise. Package comparison, not including the external termination resistors and not including the leads of the packages is shown here, where the original yellow parts are the T-SOP
and SOIC-type packages. The blue boxes are the QFN's at the 9DBV and FGV parts come in. At the eight output level, a six by six millimeter QFN is significantly smaller than the original 48
pin T-SOP used by the eight output parts in the 3.3 volt HCSL range.
●
Key applications, again, these parts are very much at home in cloud computing and in networking and storage. They're finding a very nice reception in PCI Express-based solid state drives
due to their thermal characteristics, i.e. low power, pixie instrumentation, multi-function printers and basically anywhere where you need PC Express Gen1, 2, 3 with a very low power footprint.
●
The key benefits of the ultra low power PCI Express or certainly the power consumption, it's less than one-tenth of the comparable function in the original 3.3 volt HCSL technology. Lower
power consumption directly translates into lower operating cost. And using a benchmark of one watt cost 86 cents per year in a data center for not only the powering of the device, but the
cooling of the device. Saving one watt saves 86 cents a year. So, going from an eight output yellow synthesizer to an eight output blue synthesizer results in 45 cents a year in reduced energy
cost. These devices are PCI Express Gen1, 2, 3, which means that you can reuse the same device through multiple generations of your product. They're a small form factor. They're a four by
four to six by six millimeters QFN's today. We will have a three by three for some of the very small parts in the near future. They have high integration. We have integrated output terminations
for those environments where you're driving a homogeneous type of transmission line. In other words, all the transmissions lines are 100 ohm or 85 ohm. We also offer it without the internal
terminations for cases where you may need to terminate to different types of loads. The ref on the synthesizers or the clock generators is a copy of the crystal and it is less than 1.5
picoseconds RMS phase jitter which means that it is suitable for gigabit Ethernet, which adds more integration capability to this device for your design.
●
I'm not going to spend too much time on these slides. You can view these at your leisure. The clock generator family as it exists today, on August, 20, 2012 is shown here, where we segregate
the number of outputs and basically allow you to pick your device based on your particular application requirements. Then likewise, the differential buffer family features are shown here where
you've got the number of outputs, the number of OE pins, et cetera, end count, et cetera, et cetera, and schedule for the parts.
●
In closing, I'd like to mention you can go to www.IDT.com for additional information and I would like to extend a very warm thank you for taking time to learn about IDT's ultra low power PCI
Express Timing Solutions.
www.IDT.co
PAGE 13