SHF reserves the right to change specifications and design without notice – SHF 404 MUX - V006 – 10.12.2009

Page 1/6

Description
The SHF 404 MUX is a 4:1 multiplexer which operates at data rates up to 60 Gbps for use in
SONET OC-768 and SDH STM-256 applications, broadband test setups and telecom
transmission systems. Four single ended data channels are accepted by the multiplexer at anominal input data rate of 15 Gbps and combined into a 60 Gbps differential serial data stream. Asingle ended clock signal (nominally 30 GHz) with a frequency of half the output data rate drives
the SHF 404 MUX and a copy of the divided input clock at a nominal frequency of 15 GHz isprovided as an output signal to drive preceding circuits or pattern generators. For extra flexibility,
the output amplitude of the multiplexer can be adjusted between 200 mV and 400 mV. Data andclock outputs are DC-coupled ground referenced 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 output data rates from 2 Gbps up to 60 Gbps
Optimized performance for operation from 38 Gbps to 56 Gbps
Low power consumption: 3.5 W typ.
Single ended AC-coupled inputs 400…1000 mV
Dual power supply with internal voltage regulator ±5 V
V-type connectors for the 60 Gbps outputs
K-type connectors for the data inputs and clock in-/outputs
SMB-type connectors for the clock/data bias and amplitude adjust inputs
Adjustable output amplitude

Applications•••

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

Option•Option BA: two potentiometers to allow clock bias and output amplitude to be adjusted without theneed for additional power supplies.

Functional block diagram
Data
Bias

Amplitude
Adjust
50Ω

50Ω

A
2:1
C50Ω

50Ω
Y

2:1
Y50Ω

50Ω

B
2:1
D50Ω

50Ω
CL:2

CL/2ClockBias

SHF reserves the right to change specifications and design without notice – SHF 404 MUX - V006 – 10.12.2009

Page 2/6

Specifications – SHF 404 MUXParameter

UnitMin.

Typ.

Max.

Data rate

Gbps

0.5

15Eye amplitude

mV

400

1000

Return loss

dBConditions

Input parameters-10Output parameters
1

Data bit rate

Gbps

2

Voltage high level

mV0

Voltage low level

mV

-400

Eye amplitude

mV

Rise time

300

60
single ended-300

single ended

400

single ended

ps9(20%...80%)

Fall timeps9(20%...80%)

RMS jitter

fs

Return loss

dB

400

450

500
-10

Clock parameters
Input level

mV

Input return lossdB

Clock/2 output level

mV

Clock/2 output return loss

dB

400

1000
-10300350-10Power requirements
Negative supply voltage

V-6.5-5.0

Negative supply current

mA

600

Positive supply voltage

V+5.0

Positive supply current

mA

20

Total power dissipation

W3.5

650

700
+6.5

Please note: SHF also supplies adjustable delay lines for clock-data alignment purpose. See SHF application note
AN404-1 for 4:1 multiplexing operation setup.

1

Optimized performance for operation from 38 Gbps to 56 Gbps

SHF reserves the right to change specifications and design without notice – SHF 404 MUX - V006 – 10.12.2009

Page 3/6

Output waveforms

31

Clock/2 output at 43 Gbps output data rate

31

Clock/2 output at 50 Gbps output data rate

31Clock/2 output at 60 Gbps output data rate

Eye diagram at 43 Gbps, PRBS 2 -1

Eye diagram at 50 Gbps, PRBS 2 -1

Eye diagram at 60 Gbps, PRBS 2 -1

Measured using Agilent DCA 86100B, sampling module 86118A [70 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 404 MUX - V006 – 10.12.2009

Page 4/6

Amplitude adjust at 50 Gbps

Amplitude adjust = 5 V; Output = 418 mV

Amplitude adjust = 4 V; Output = 379 mV

Amplitude adjust = 3 V; Output = 334 mV

Amplitude adjust = 2 V; Output = 285 mV

Amplitude adjust = 1 V; Output = 229 mV

Amplitude adjust = 0 V; Output = 170 mV

Measured using Agilent DCA 86100B, sampling module 86118A [70 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 404 MUX - V006 – 10.12.2009

Page 5/6

Module outline
7,18,69,121
13
7,2

9,510,3Clock
Bias

Clk/2

D36+ 5V- 5VAmpl.
AdjustClk/Clk

B

9,5AY

19,39,39,319
26,5Data
Bias

Y

SHF 404MUXC

10,618283848

26

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

PortA

Connector
K

B

K

CK

DK

Clk

K

Clk/2

KY
_YV

Clock
Bias
Data Bias
Amplitude
Adjust

V
SMB
SMB
SMB

3363

Bottom view

10,666

10,3All dimensions in mm

SHF reserves the right to change specifications and design without notice – SHF 404 MUX - V006 – 10.12.2009

Page 6/6