SHF Communication Technologies AGWilhelm-von-Siemens-Str. 23 • Aufgang D • 12277 Berlin – Marienfelde • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: sales@shf.biz • Web: http://www.shf.biz

Datasheet
SHF 423 Demux
60 Gbps Demultiplexer ModuleDescription
The SHF 423 is a 1:4 demultiplexer operating at data rates up to 60 Gbps for use in SONET OC768 and SDH STM-256 applications, broadband test setups, and telecom transmission systems. A
60 Gbps single ended serial data stream is accepted by the demultiplexer and converted into four
single ended data signals at a nominal output data rate of 15 Gbps. A single ended clock signal(nominally 30 GHz) with a frequency half of the input data rate drives the SHF 423, and a copy ofthe divided input clock (with a nominal frequency of 15 GHz) is provided as an output signal todrive succeeding circuits or an error analyzer. Data and clock outputs are DC-coupled groundreferenced CML signals with on-chip 50 Ω terminations. The data and clock inputs are AC-coupled
and also include 50 Ω terminations.

Features
SiGe HBT technology
Supports input data rates from 2 Gbps up to 60 Gbps
Low power consumption: 3.5 W typ.
Dual power supply with internal voltage regulator ±5 V
V-type connectors for the 60 Gbps data input
K-type connectors for the data outputs and clock in-/outputs
SMB-type connectors for the clock/data bias inputs

Applications
SONET OC-768 and SDH STM-256 applications
Broadband test setups
Telecom transmission systems and transponder prototyping

OptionOption BA: two potentiometers to allow data bias and clock bias to be adjusted without theneed for additional power supplies.

Functional block diagram
50
DataBiasA
1:2C50

Data

1:250
B
1:2D50CL50:2

CL/2ClockBias
SHF reserves the right to change specifications and design without notice - SHF 423 - Rev. 1.4 - 13/SEP/2004

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Specifications – SHF 423 DEMUXParameter

UnitMin.

Data bit rate

Gbps

2

Data eye amplitudemV

Sensitivity

mV

Return loss

dB

Typ.

Max.

Conditions

Input parameters
60
1000
50150

<55 Gbps<60 Gbps-10Output parameters
Data bit rate

Gbps

0.5

Voltage high level

mV0Voltage low levelmV-300Eye amplitude

mV

Rise time

ps1520(20%...80%)

Fall time

ps1520(20%...80%)

RMS jitter

ps1Return loss

dB

250

15
single ended
-250

300

single ended
single ended-10

Clock parameters
Input level

mV

400

Clock phase margin

deg

200
160

Input return lossdB

Clock/2 output level

mV

Clock/2 output return loss

dB

1000
<50 Gbps<60 Gbps-10300350-10Power requirements
Negative supply voltage

V-6.5

-5.0

Negative supply current

mA

600

Positive supply voltage

V+5.0

Positive supply currentmA20Total power dissipation

W3.5

650700+6.5

Note: SHF also supplies adjustable delay lines for clock-data alignment purpose. See SHF
application note AN423-1 for 1:4 demultiplexing operation setup.

SHF reserves the right to change specifications and design without notice - SHF 423 - Rev. 1.4 - 13/SEP/2004

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Output waveforms

Eye Diagram at 10.75 Gbps
31(43 Gbps input data rate), PRBS 2 -1

Clock/2 Output at 43 Gbps input data rate

Eye Diagram at 12.5 Gbps
31(50 Gbps input data rate), PRBS 2 -1

Clock/2 Output at 50 Gbps input data rate

Eye Diagram at 15 Gbps
(60 Gbps input data rate), PRBS 231-1

Clock/2 Output at 60 Gbps input data rate

Measured using Agilent DCA 86100B, sampling module 83484A [50 GHz], precision timebase module
86107A, 0.5 m microwave cable assembly, 10 dB attenuator
SHF reserves the right to change specifications and design without notice - SHF 423 - Rev. 1.4 - 13/SEP/2004

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Sensitivity
150

Sensitivity [mV]

125100755025001020304050605060Input Bit Rate [Gbps]

Clock phase margin
350

Clock Phase Margin [degree]

300
250
200150100500010203040

Input Bit Rate [Gbps]

The results presented above represent the performance of a typical device
SHF reserves the right to change specifications and design without notice - SHF 423 - Rev. 1.4 - 13/SEP/2004

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Module outline
7,1

8,6

9,1

21
13
7,2

9,5

10,3ClockBias

A36+ 5V- 5VC

9,5B

Clk/2

19,3
9,3

19
26,5

Data
Bias

DClk

SHF 423
DEMUX

Data

10,6

1828384826

Ø3(4x)

16,7

Please ensure that adequate coolingof the multiplexer is guaranteed. We
recommend a heat sink with a thermal
resistance of approx. 3 K/W

PortAConnectorKBKCKDKClkK

Clk/2

K

Data

V

Clock
Bias

SMB

Data
Bias

SMB

3363

Bottom view

10,66610,3

All dimensions in mm

SHF reserves the right to change specifications and design without notice - SHF 423 - Rev. 1.4 - 13/SEP/2004

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