For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
1
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
The HMC842LC4B is a 1:2 Fanout Buffer designed
to support data transmission rates up to 45 Gbps.
The device can also operate with clock signals up to
28 GHz. During normal operation, input data (or clock)
is transferred to both output channels. Differential input
and output signals of the HMC842LC4B are terminated
with 50 Ohms to ground on-chip, and may be either AC
or DC coupled. The Outputs can be connected directly
to a 50 Ohms-to-ground terminated system, while DC
blocking capacitors should be used if the terminating
system is 50 Ohms to a non-ground DC voltage.
The HMC842LC4B also features two separate output
level control pins, VAC1 and VAC2 which provide loss
compensation and signal level optimization for each
output channel independently. The HMC842LC4B
operates from a single -3.3V DC supply and is available
in a ceramic RoHS compliant 4 x 4 mm SMT package.
General Description
Features
Functional Diagram
Supports Clock Frequencies up to 28 GHz
Independent Programmable Output Swing for
Each Channel: 400 - 1200 mVp-p Diff.
Supports Single-Ended or Differential Operation
Power Consumption: 465 mW
Less than 500 fs Additive RMS Jitter
Fast Rise and Fall Times: <12ps
24 Lead 4x4mm SMT Package: 16mm2
Typical Applications
The HMC842LC4B is ideal for:
• OC-768 and SDH STM-256 Equipment
• RF ATE Applications
• Short, intermediate, & Long Haul Fiber Optic
Applications
• Broadband Test & Measurement
• Serial Data Transmission up to 45 Gbps
• Clock Buffering up to 28 GHz
Electrical Specications, TA = +25°C, Vee = -3.3V
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage ±5 % Tolerance -3.47 -3.3 - 3.13 V
Power Supply Current VAC1 = VAC2 = -0.3V
(Vout = 930 mVp-p diff @ 40 Gbps) 120 140 160 mA
Output Amplitude Control Voltage [1]
(VAC1, VAC2) -1.4 -0.3 0 V
Maximum Data Rate 45 Gbps
Maximum Clock Rate 28 32 GHz
Input Amplitude Single-ended, peak-to-peak 50 1000 mVp-p
Differential, peak-to-peak 100 2000
Input High Voltage -0.5 0.5 V
Input Low Voltage -1 0 V
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
2
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Electrical Specications, (continued)
Parameter Conditions Min. Typ. Max Units
Output Amplitude Differential, peak-to-peak @ 40 Gbps 400 1200 mVp-p
Output High Voltage VAC = -0.3 -10 mV
Output Low Voltage VAC = -0.3 -550 mV
Input Return Loss frequency < 32 GHz 10 dB
Output Return Loss frequency < 32 GHz 7 dB
Deterministic Jitter, Jd [2] 3 ps, pp
Additive Random Jitter Jr @ 28 GHz Clock Input 0.3 ps rms
@ 32 GHz Clock Input 0.6 ps rms
Rise Time, tr [2] 11 ps
Fall Time, tf [2] 11 ps
Propagation Delay, td 10 ps
OUT1 to OUT2 Data Skew, tskew [2] 2ps
[1] VAC1=VC2 and VAC2=VC1 on evaluation board
[2] Data Input: 40 Gbps PRBS 223-1 pattern, 150 mVp-p single-ended
[1] VAC = -0.3V [2] Input data rate: 40 Gbps PRBS 223-1 [3] Frequency = 20 GHz
DC Current vs. Supply Voltage [1] [2]
Differential Output Swing vs.
Supply Voltage [1] [2]
Differential Output Swing vs. VAC [3] Differential Output Swing vs. Frequency [1]
50
75
100
125
150
175
200
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
+25C
+70C
-40C
SUPPLY VOLTAGE Vee (V)
DC CURRENT (mA)
0
200
400
600
800
1000
1200
1400
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0
+25C
+70C
-40C
CONTROL VOLTAGE VAC (V)
DIFFERENTIAL VOLTAGE (mVp-p)
600
700
800
900
1000
1100
1200
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
+25C
+70C
-40C
SUPPLY VOLTAGE Vee (V)
DIFFERENTIAL VOLTAGE (mVp-p)
0
200
400
600
800
1000
1200
1400
0 4 8 12 16 20 24 28 32
+25C
+70C
-40C
FREQUENCY (GHz)
DIFFERENTIAL VOLTAGE (mVp-p)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
3
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
[1] VAC = -0.3V [2] Input data rate: 40 Gbps PRBS 223-1 [3] Data was taken at single ended output
[4] Source jitter was not deembeded [5] Device measured on evaluation board with single-ended time domain gating.
Rise / Fall Time vs. VAC [1][2][3]
Input Return Loss vs. Frequency [1][5]
Peak-to-Peak Jitter vs. Supply Voltage [1][2][3][4]
Output Return Loss vs. Frequency [1][5]
Fall Time vs. Supply Voltage [1][2][3]
Rise Time vs. Supply Voltage [1][2][3]
6
8
10
12
14
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
+25C
+70C
-40C
SUPPLY VOLTAGE Vee (V)
RISE TIME (ps)
6
8
10
12
14
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0
Rise Time
Fall Time
CONTROL VOLTAGE VAC (V)
RISE/FALL TIME (ps)
-30
-25
-20
-15
-10
-5
0
0 4 8 12 16 20 24 28 32
Data
FREQUENCY (GHz)
RESPONSE (dB)
6
8
10
12
14
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
+25C
+70C
-40C
SUPPLY VOLTAGE Vee (V)
FALL TIME (ps)
0
2
4
6
8
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
+25C
+70C
-40C
SUPPLY VOLTAGE Vee (V)
P-P JITTER (ps)
-40
-35
-30
-25
-20
-15
-10
-5
0
0 4 8 12 16 20 24 28 32
OUT1
OUT2
FREQUENCY (GHz)
RESPONSE (dB)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
4
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
40 Gbps Differential Output Eye Diagram 28 GHz Differential Output Eye Diagram
Timing Diagram
Measurements
Current Min Max Total
Meas.
Eye Amp 921 mV 920 mV 922 mV 75
Rise Time 11.11 ps 10.89 ps 11.11 p s 75
Fall Time 11.11 p s 10.44 ps 11.11 ps 75
p-p Jitter 5.778 ps 5.333 ps 5.778 ps 75
Measurements
Current Mean Min Max
V Amp 558.99 mV 556.8 mV 543.46 mV 577.6 2 mV
Rise Time 6.86 ps 6.816 ps 6.28 ps 7. 4 3 p s
Fall Time 6.91 ps 6.473 ps 5.84 ps 7.01 ps
Time Scale: 10 ps/div
Amplitude Scale: 210 mV/div
Test Conditions:
Vee = -3.3V, VAC = -0.3V
Input Data: Single ended 150 mVp-p 40 Gbps NRZ
PRBS 223-1 pattern
Time Scale: 12 ps/div
Amplitude Scale: 120 mV/div
Test Conditions:
Vee = -3.3V, VAC = -0.3V
Input Data: Single ended 300 mVp-p 28 GHz clock
signal
Input Outputs
DOUT1 OUT2
L L L
H H H
Notes:
D = DP - DN
OUT1 = OUTP1 - OUTN1
OUT2 = OUTP2 - OUTN2
H - Logic High
L - Logic Low
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
5
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Power Supply Voltage (Vee) -3.7V to +0.5V
Input Voltage -1.3V to +0.5V
Channel Temperature 125°C
Continuous Pdiss (T = 85°C)
(derate 18.48 mW/°C above 85°C) 0.74 W
Thermal Resistance
(channel to ground paddle) 54.11 °C/ W
Storage Temperature -65°C to +125°C
Operating Temperature -40°C to +70°C
Output Amplitude
Control Voltage (VAC) -2.3V to +0.5V
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING:
30-80 MICROINCHES GOLD OVER
50 MICROINCHES MINIMUM NICKEL.
3. DIMENSIONS ARE IN INCHES [MILLIMETERS].
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm DATUM -C-
6. ALL GROUND LEADS AND GROUND PADDLE
MUST BE SOLDERED TO PCB RF GROUND.
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC842LC4B Alumina, White Gold over Nickel MSL3 [1] H842
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
6
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Pin Number Function Description Interface Schematic
1VAC1
Output Amplitude Control Voltage for OUT1
Note: VAC1=VC2 on evaluation board
2, 5, 8, 11, 14,
17, 21 Package
Bottom
GND Signal and supply grounds
3, 4 OUTP1, OUTN1 Differential (OUTP1-OUTN1)
or single ended (OUTP1) outputs
6, 7, 12, 13,
19, 24 N/C
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
9, 10 DN, DP Differential (DP-DN) or single ended (DP) inputs
15, 16 OUTN2, OUTP2 Differential (OUTP2-OUTN2)
or single ended (OUTP2) outputs
18 VAC2
Output Amplitude Control Voltage for OUT2
Note: VAC2=VC1 on evaluation board
20, 22, 23 Vee Power Supply (-3.3V)
Pin Descriptions
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
7
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Evaluation PCB
List of Materials for Evaluation PCB 129151 [1]
Item Description
J1 - J6 K Connector
J9 - J12 DC Pin
C1, C3 - C6 1000 pF Capacitor, 0402 Pkg.
C2 0.1 µF Capacitor, 0402 Pkg.
C7 - C9 4.7 µF Capacitor, Tantalum
U1 HMC842LC4B 1:2 Fanout Buffer
PCB [2] 129821 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350
Item Description
J1 OUTP1
J2 OUTN1
J3 OUTP2
J4 OUTN2
J5 DN
J6 DP
J9 VAC1
J10 VAC2
J11 GND
J12 Vee
The circuit board used in the application should
use RF circuit design techniques. Signal lines
should have 50 Ohm impedance while the package
ground leads should be connected directly to the
ground plane similar to that shown. The exposed
metal package base must be connected to Vee.
A sufficient number of via holes should be used to
connect the top and bottom ground planes. The
evaluation circuit board shown is available from
Hittite upon request.
Note: VC1 on evaluation board is VAC2 and VC2 on evaluation board is VAC1
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 • Fax: 978-250-3373 • Order online at www.hittite.com
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMT
8
HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Application Circuit
Note: VAC1(J9)=VC2 and VAC2(J10)=VC1 on evaluation board.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
