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DOC# 008-0582-0 Rev. C

Page 1 of 7

Model 643H

Very Low Jitter HCSL Clock

Features



High Speed Current Steering Logic [HCSL] Output



Ceramic Surface Mount Package



Low Phase Jitter Performance, 500fs Typical





Frequency Range 13.5MHz – 156.25MHz *



+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

Description

CTS Model 643H is a low cost, high performance clock oscillator supporting HCSL output. Employing the latest IC

technology, M643H has excellent stability and low phase jitter performance.

Ordering Information

Model

643

Code

Code

Code

H

5

2

4

3

3

2

Code

Code

Code

C

R

I

G

Notes:

1]

2]

Refer to document 016-1454-0, Frequency Code Tables. 3-digits for frequencies <100MHz, 4-digits for frequencies 100MHz or greater.

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.

Packing

-20°C to +70°C

3k pcs./reel

-40°C to +85°C

Check factory for availability. Stability codes 2 and 3 only.

±30ppm

+3.3Vdc

±50ppm

±100ppm

Frequency

Temp. Range

Output

Stability

Voltage

HCSL - Pin 1 Enable

±25ppm

+2.5Vdc

H

XXX or XXXX

3

I

3

R

Output

Type

Frequency Code

[MHz]

Frequency

Stability

Temperature

Range

Supply

Voltage

Packaging

Part Dimensions:

3.2 × 2.5 × 1.2mm • 24mg

Standard Frequencies

- 25MHz

- 100MHz

- 155.52MHz

- 27MHz

- 106.25MHz

- 156.25MHz

- 50MHz

- 125MHz

* Check with factory for availability of frequencies not listed.