SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772051-0 • Fax +49 30 7531078
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 621 A60 Gbps
1:2 Demultiplexer

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Description
The SHF 621 A is a 1:2 demultiplexer operating at data rates up to 60 Gbps for use in broadband test
setups and telecom transmission systems. A 60 Gbps single ended serial data stream is accepted by thedemultiplexer and converted into two single ended data signals at a nominal output data rate of 30 Gbps.
A single ended clock signal (nominally 30 GHz) with a frequency half of the input data rate drives the SHF
621 A. All in- and output ports are AC-coupled. Unused in- or output ports should be terminated.

Features•••••

Broadband operation up to 60 Gbps
Differential data inputs
Data Input Sensitivity <50 mVSingle ended clock input and data outputs
Bias BoardApplications•••

100G Ethernet development and prototyping
OC-768 / STM-256 applications
Telecom transmission••

Fibre Channel
Broadband test and measurement equipment®

Block Diagram®

Fibre Channel is a registered trademark of the Fibre Channel Industry Association

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Bias Board
At delivery, the bias board is mounted on a common base plate, together with the SHF 621 A DEMUX.
When using the bias board only one supply voltage of -5V needs to be applied; all operating voltages willbe provided by the bias board.
With the factory settings all bias voltages are set to optimum / maximum output voltage. However, if
required the customer can adjust input data bias voltages “DB1” and “DB2” with the appropriate trim
potentiometers on the bias board.
For system applications it is possible to remove the bias board. In that case the operating voltages haveto be supplied by the customer’s circuitry.
Not Used
Data Bias Adjust “DB1”Data inv. Bias Adjust “DB2”
Not Used-5V

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Specifications
Parameter

Unit

Symbol

Min.

Typ.

Max.

CommentMinimum Input Data Rate

Gbps

Rin,min12@ 500mVpp clock input

Maximum Input Data Rate

Gbps

Rin,max

Data Input Voltage

mVpp

Vdata in

Data Input Sensitivity

mV

Vdata in50

Clock Input Frequency

GHz

fin

230

Clock Input VoltagemVpp

Vclk in300

1000

Output Amplitude

mVVout350

Rise / Fall time

ps

tr/tf

810fsJrms

400

500

Supply Voltage

VVee-5-4.8

Supply Current

mA

Iee

300330Power DissipationmWPd1500

Input Data Bias

VDB1-3.3-1,650

Input inverted Data Bias

VDB2-3.3-1,650°CTambient

15Input Parameters

6064@ 500mVpp clock input
1000
Eye Height, see page 8

See page 8

Output Parameters

Output Jitter, RMS value

1380

Single ended
20% / 80%

Power Requirements-5.2@ VEE = -5V;
incl. Bias Board

Bias Voltages

Conditions
Operating Temperature

135

Test condition: Input Signal JitterRMS = 230 fs

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Typical Output Eye Diagrams
31

The measurements below had been performed using a SHF 12103 A BPG (PRBS 2 -1) and an Agilent
86100D DCA with Precision Time Base Module (86107A) and 70 GHz Sampling Head (86118A). The
outputs of the demultiplexer module had been connected directly to the DCA input.

Out A @ 32 Gbps

Out B @ 32 Gbps

Out A @ 30 Gbps

Out B @ 30 Gbps

Out A @ 28 Gbps

Out B @ 28 Gbps

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Out A @ 25 Gbps

Out B @ 25 Gbps

Out A @ 21,5 Gbps

Out B @ 21,5 Gbps

Out A @ 16 Gbps

Out B @ 16 Gbps

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Out A @ 14 Gbps

Out B @ 14 Gbps

Out A @ 12,5 Gbps

Out B @ 12,5 Gbps

Out A @ 8 Gbps

Out B @ 8 Gbps

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Typical Results
31

The measurements shown below had been performed using a SHF 601 A (PRBS 2 -1,VEyeHeight = 100 mV), a SHF 11100 A Error Analyzer, an Agilent 86100D DCA with Precision Time Base
Module (86107A) and a 70 GHz Sampling Head (86118A) to determine the eye height and jittercontribution of the input signal. In case of the sensitivity measurement the input signal had been reduced-9
until a BER limit of <10 was achieved. For the clock phase margin measurement the phase of the clock
signal was varied until the BER reached the 10-9 limit.

Sensitivity [mV], Eye Height

Data Input Sensitivity
14012010080604020005101520253035404550556065705055606570

Bit Rate [Gbps]

Clock Phase Margin
400
Phase Margin [°]350300250200150
100500051015202530354045

Bit Rate [Gbps]

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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Outline Drawing

3459,1

29,1

1GND
3,8
5,08
4 x 5,08

19

12,34x Ø2,7InInAB
DEMUX

292935Clk

35

XXXXX

1938

SHF 621 A

SHF AG BerlinPortConnector

Out1.85mm (V) femaleOut

1.85mm (V) female

A2.92mm (K) femaleB

2.92mm (K) female

Clk

2.92mm (K) female

PinDesignation

1nc

2

Data Bias 1 (DB1)3

Data Bias 2 (DB2)4nc

5-5V-5V

3

3

DB1 DB2

28
34
40
47,2

9,65,08
9,719,59,6

SHF reserves the right to change specifications and design without notice – SHF 621 A - V002 – April 03, 2012

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