Model 645H
Very Low Jitter HCSL Clock
Features
ꢀ High Speed Current Steering Logic [HCSL] Output
ꢀ Ceramic Surface Mount Package
ꢀ Low Phase Jitter Performance, 500fs Typical
ꢀ Fundamental or 3rd Overtone Crystal Design
ꢀ Frequency Range 13.5MHz – 160MHz *
ꢀ +2.5V or +3.3V Operation
Part Dimensions:
5.0 × 3.2 × 1.4mm • 58.1mg
ꢀ Output Enable Standard
ꢀ Tape and Reel Packaging, EIA-481
Standard Frequencies
* See Page 8 for common frequencies.
Applications
Check with factory for availability of frequencies not listed.
ꢀ PCI Express [PCIe]
ꢀ Intel Chipsets
ꢀ Data Storage Systems
ꢀ Ethernet Line Cards
ꢀ Serial ATA Express [SATAe]
ꢀ Network Servers
ꢀ Switches and Routers
ꢀ Set-Top Boxes/DVRs
Description
CTS Model 645H is a low cost, high performance clock oscillator supporting HCSL output. Employing the latest IC
technology, M645H has excellent stability and low phase jitter performance.
Ordering Information
Output
Type
H
Frequency
Stability
3
Temperature
Supply
Voltage
3
Frequency Code
[MHz]
Packaging
T
Model
Range
I
645
XXX or XXXX
Output
Stability
±25ppm
±30ppm
±50ppm
±100ppm
Voltage
+2.5Vdc
+3.3Vdc
Code
H
Code
Code
HCSL - Pin 1 Enable
5
4
3
2
2
3
Frequency
Product Frequency Code 1
Temp. Range
-20°C to +70°C
-40°C to +85°C
-40°C to +105°C 2
Packing
Code
Code
Code
T
1k pcs./reel
C
I
G
Notes:
1] Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies <100MHz, 4-digits for frequencies 100MHz or greater.
Check factory for availability. Stability codes 2 and 3 only.
2]
Not all performance combinations and frequencies may be available.
Contact your local CTS Representative or CTS Customer Service for availability.
This product is specified for use only in standard commercial applications. Supplier disclaims all express and implied warranties and liability in connection with any use of this
product in any non-commercial applications or in any application that may expose the product to conditions that are outside of the tolerances provided in its specification.
DOC# 008-0582-1 Rev. E
Page 1 of 8
©2017 CTS® Corporation. Information/product(s) subject to change. No warranty that product(s) will meet the stated specifications for customer specific applications or test
equipment. Visit www.ctscorp.com for list of applicable patent(s), more information, or to request a quote.