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-communication.com • Web: http://www.shf-communication.com

Datasheet
SHF C642 B
60 GHz T-Flip-Flop (TFF)
1:2 Frequency Divider

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 1/9

Description
The SHF C642 B is a T-Flip-Flop (TFF) module capable of broadband operation up to 60 GHz using asinusoidal input signal. A frequency of half the input frequency is provided at the outputs. It offers highquality output signals together with a compact size and ease of operation.

FeaturesBroadband operation up to 60 GHz
Two differential output ports with 90° phase shift between the outputs
700 mVpp single ended output swing
Single ended or differential operation (either In or In! or both can be used)

Applications


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

Fibre Channel
Broadband test and measurement equipment®

Block DiagramInInSHFC642 B

Out2

Out1TFF
Out2

Out1
Mini-USB(Service only)+5VFEAccessories1
 +5V Power Supply Desktop Adapter
 Functional earth cable  Connection to test setup ground has to be set up first before any otherconnection to prevent instrument damage!

®
1

Fibre Channel is a registered trademark of the Fibre Channel Industry Association
Mini-USB port is only for service purposes, no USB cable will be provided

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 2/9

Absolute Maximum RatingsParameter

Unit

SymbolInput Voltage

mVVclk inExternal DC Voltage on
RF Input Ports

VVDCinExternal DC Voltage on
RF Output PortsV

DC Supply Voltage

Min.

Typ.

Max.

Comment

Input Parameters
900

Peak-to-Peak-6+6

AC coupled input

VDCout-6+6

AC coupled output

VVcc

0+6Unit

SymbolMin.

GHz

fin,minGHz

fin,max

60

mV

Vin

500
600

900
3900

3

≤ 50GHz> 50GHz
Single ended, peak-topeak, see page 7mVVout

500

900

Single ended, peak-topeak, see page 7

Supply Voltage

VVcc

4.8

Supply Current

mA

Power Dissipation

Specifications
Parameter

Typ.

Max.

Comment12@ 500mV input
amplitude, see page 7

Input Parameters
Minimum Input Frequency

2Maximum Input Frequency
Input Voltage

62@ 500mV input
amplitude, see page 7

Output Parameters
Output Voltage
Power Requirements
5.0

5.2

Icc

630

700mW

Pd3150°C

Tambient@ VCC = +5VConditions
Operating Temperature

152

Theoretical limit is DC, practical limit depends on slew rate of input signal

3corresponds to a maximum sinusoidal input signal of +3dBm

35

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 3/9

Typical Output Waveforms
The measurements below had been performed using an Agilent 86100B DCA with Precision Time Base
Module (86107A) and 70 GHz Sampling Head (86118A). The output of the TFF had been connected directly
to the DCA input.

Output signal @ fout = 30 GHz

Output signal @ fout = 28 GHz

Output signal @ fout = 25 GHz

Output signal @ fout = 21.5 GHz

Output signal @ fout = 16 GHz

Output signal @ fout = 14 GHz

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 4/9

Output signal @ fout = 12.5 GHz

Output signal @ fout = 8 GHz

Output signal @ fout = 0.5 GHz

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 5/9

Output Signal Timing
The measurements had been performed using an Agilent 86100B DCA with Precision Time Base Module(86107A) and 70 GHz Sampling Head (86118A). The output of the TFF had been connected directly to theDCA input. The screenshots shown below describe the phase relation between the 2 differential output
signals with its 90° phase shift between output port 1 and output port 2.

Out1 @ fout = 5 GHz

Out1 inverted @ fout = 5 GHz

Out2 @ fout = 5 GHz

Out2 inverted @ fout = 5 GHz

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 6/9

Typical Results

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 7/9

Outline Drawing – Moduleb ca4028
104xØ2.7

13.6

12.4

13.6

InInOut1Out2SHF C642 BTFFOut2Out13

SHF Communication
Technologies AG+5 V DCPortConnector

In1.85mm (V) female

In1.85mm (V) female

Out12.92mm (K) female

Out1

2.92mm (K) female

Out2

2.92mm (K) female

Out2

2.92mm (K) female

13.6

3413.6

23.7USB

354554514535

XXXXX

PortConnector

aMini-USB

bPowerc

Functional earth (FE)All dimensions are in mm.

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 8/9

Outline Drawing – Module with Heat Sinkb ca52.7
1019.66

In19.6

InOut1Out2SHF C642 BTFF

Out2Out1XXXXX+5 V DC

70101111

USB111101120132.4

SHF Communication
Technologies AGPortConnector

In120

PortConnector

1.85mm (V) female

aMini-USB

1.85mm (V) female

bPower

2.92mm (K) femalecFunctional earth (FE)Out1

2.92mm (K) female

Out2

2.92mm (K) female

Out2

2.92mm (K) female

37InOut1All dimensions are in mm.

SHF reserves the right to change specifications and design without notice – SHF C642 B - V001 – September 23, 2020 Page 9/9