645H Clock Datasheet

645H Datasheet, PDF, Equivalent


Part Number

645H

Description

Very Low Jitter HCSL Clock

Manufacture

CTS

Total Page 7 Pages
Datasheet
Download 645H Datasheet


645H
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
Output Enable Standard
Tape and Reel Packaging, EIA-418
Applications
PCI Express [PCIe]
Data Storage Systems
Ethernet Line Cards
Serial ATA Express [SATAe]
Intel Chipsets
Network Servers
Switches and Routers
Set-Top Boxes/DVRs
Part Dimensions:
5.0 × 3.2 × 1.4mm • 58.1mg
Standard Frequencies
- 25MHz
- 100MHz
- 27MHz
- 106.25MHz
- 50MHz
- 125MHz
- 155.52MHz
- 156.25MHz
* Check with factory for availability of frequencies not listed.
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
Model
645
Output
Type
H
Frequency Code
[MHz]
XXX or XXXX
Frequency
Stability
3
Temperature
Range
I
Supply
Voltage
3
Packaging
T
Code
H
Output
HCSL - Pin 1 Enable
Code
5
4
3
2
Stability
±25ppm
±30ppm
±50ppm
±100ppm
Code
2
3
Voltage
+2.5Vdc
+3.3Vdc
Code Frequency
Code Temp. Range
Code Packing
Product Frequency Code 1
C -20°C to +70°C
I -40°C to +85°C
T 1k pcs./reel
G -40°C to +105°C 2
Notes:
1] Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies <100MHz, 4-digits for frequencies 100MHz or greater.
2] Check factory for availability. Stability codes 2 and 3 only.
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. C
Page 1 of 7
©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.

645H
Electrical Specifications
Operating Conditions
PARAMETER
SYMBOL
Maximum Supply Voltage
VCC
Supply Voltage
VCC
Supply Current
ICC
Operating Temperature
Storage Temperature
TA
TSTG
CONDITIONS
-
±5%
Maximum Load
Maximum Current Value @ +3.3V
-
-
Model 645H
Very Low Jitter HCSL Clock
MIN
TYP
MAX
UNIT
-0.3 - 4.0 V
2.375 2.5 2.625
3.135 3.3 3.465
V
- - 60 mA
-20 +70
-40 +25 +85
°C
-40 +105
-50
-
+125
°C
Frequency Stability
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
Frequency Range
Frequency Stability
[Note 1]
Aging
fO
Δf/fO
Δf/f25
-
-
First Year @ +25°C, nominal VCC
13.5 - 160
25, 30, 50 or 100
-5 ±3
5
1.] Inclusive of initial tolerance at time of shipment, changes in supply voltage, load, temperature and 1st year aging.
UNIT
MHz
±ppm
ppm
Output Parameters
PARAMETER
Output Type
Output Load
Output Voltage Levels
Output Duty Cycle
Differential Output Voltage
Rise and Fall Time
SYMBOL
-
RL
VOH
VOL
SYM
VOD
TR, TF
CONDITIONS
-
Terminated to ground
HCSL Load
Differential Output, @ VCC - 1.3V
RL = 50 Ohms to ground
@ 20%/80% Levels, RL = 50 Ohms to ground
MIN
-
-580
-150
45
0.4
-
TYP
HCSL
50
-
-
-
-
0.50
MAX
-
850
150
55
-
0.70
UNIT
-
Ohms
mV
%
Vp-p
ns
Output Parameters
PARAMETER
Start Up Time
Enable Function [Standby]
Enable Input Voltage
Disable Input Voltage
Disable Current
Enable Time
Phase Jitter, RMS
SYMBOL
TS
VIH
VIL
IIL
TPLZ
tjrms
CONDITIONS
Application of VCC
Pin 1 Logic '1', Output Enabled
Pin 1 Logic '0', Output Disabled
Pin 1 Logic '0', Output Disabled
Pin 1 Logic '1', Output Enabled
Bandwidth 12 kHz - 20 MHz
MIN
TYP
MAX
UNIT
- 5 10 ms
0.7VCC
-
-
- - 0.3VCC
- 15 -
- -2
- 500 -
V
V
µA
ms
fs
DOC# 008-0582-1 Rev. C
Page 2 of 7
©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.


Features Model 645H Very Low Jitter HCSL Clock F eatures  High Speed Current Steering Logic [HCSL] Output  Ceramic Surfac e Mount Package  Low Phase Jitter Pe rformance, 500fs Typical  Fundamenta l or 3rd Overtone Crystal Design  Fr equency Range 13.5MHz – 160MHz *  +2.5V or +3.3V Operation  Output Ena ble Standard  Tape and Reel Packagin g, EIA-418 Applications  PCI Expres s [PCIe]  Data Storage Systems  E thernet Line Cards  Serial ATA Expre ss [SATAe]  Intel Chipsets  Netw ork Servers  Switches and Routers Set-Top Boxes/DVRs Part Dimensions: 5.0 × 3.2 × 1.4mm • 58.1mg Standar d Frequencies - 25MHz - 100MHz - 27M Hz - 106.25MHz - 50MHz - 125MHz - 1 55.52MHz - 156.25MHz * Check with fact ory for availability of frequencies not listed. Description CTS Model 645H is a low cost, high performance clock osc illator supporting HCSL output. Employi ng the latest IC technology, M645H has excellent stability and low phase jitter performance. Ordering Information Model 645 Output Type H.
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