Clock buffer driver distributor chip 9ZX21901BKLFT
19-Output Differential Zbuffer for PCIe Gen2/3 and QPI
Description
The 9ZX21901 is a version of the Intel DB1900Z Differential Buffer
with an ajdustable external feedback path allowing the user to
eliminate trace delays from their design. It is suitable for PCIe
Gen3
or QPI applications. The part is backwards compatible to PCIe
Gen1 and Gen2. The device maintains low drift for critical QPI
applications. In bypass mode, the IDT9ZX21901 can provide outputs
up to 400MHz.
Features/Benefits
9ZX21901B
• External feedback path; Adjustable input-to-output delay
• 9 Selectable SMBus addresses/ Multiple devices can
share same SMBus segment
• 8 dedicated OE# pins/ hardware control of outputs
• PLL or bypass mode/ PLL can dejitter incoming clock
Recommended Application
19 output PCIe Gen3/QPI buffer with adjustable feedback for Romley
platforms
Output Features
• 19 - 0.7V current mode differential HCSL output pairs
Functional Block Diagram
8
OE(5_12)#
DIF_IN
DIF_IN#
• Selectable PLL BW/ minimizes jitter peaking in
downstream PLL's
• Spread spectrum compatible/tracks spreading input clock
for EMI reduction
• SMBus Interface/ unused outputs can be disabled
• 100MHz & 133.33MHz PLL mode/ Legacy QPI support
• Undriven differential outputs in Power Down mode for
maximum power savings
Key Specifications
• Cycle-to-cycle jitter: < 50ps
• Output-to-output skew: <65ps
• Input-to-output delay: User adjustable
• Input-to-output delay variation: <50ps
• Phase jitter: PCIe Gen3 < 1ps rms
• Phase jitter: QPI 9.6GB/s < 0.2ps rms
Packaging and transportation instructions
- According to the standard export packaging.
Customers can choose from cartons, wooden cases and wooden pallets
according to their own requirements.
Q&A
1. How to obtain the price?
We usually quote within 24 hours after receiving your inquiry
(except weekends and holidays). If you are in urgent need of a
price, please send us an email or contact us in any other way so
that we can provide you with a quotation.
2. What is your delivery time?
This depends on the quantity of the order and the season in which
you place the order. Usually, we can ship the goods within 7 to 15
days (for small batches), and for large batches, it takes about 30
days.
3. What are your payment terms?
Factory price, 30% deposit, 70%T/T payment before shipment.
4. What is the mode of transportation?
It can be transported by sea, air or express delivery (EMS, UPS,
DHL, TNT, FEDEX, etc.). Please confirm with us before placing an
order.
5. How do you help our business establish a long-term and good
relationship?
We maintain good quality and competitive prices to ensure that our
customers benefit.
2. We respect every customer as our friend. We do business with
them sincerely and make friends with them, no matter where they
come from.
