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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
1
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
The HMC744LC3 is a 1:2 Fanout Buffer designed to
support data transmission rates up to 14 Gbps, and
clock frequencies as high as 14 GHz.
All differential inputs to the HMC744LC3 are CML and
terminated on-chip with 50 Ohms to the positive supply,
Vcc, and may be AC or DC coupled. The differential
CML outputs are source terminated to 50 Ohms and may
also be AC or DC coupled. Outputs can be connected
directly to a 50 Ohm Vcc-terminated system, while DC
blocking capacitors may be used if the terminating
system is 50 Ohms to ground. The HMC744LC3 also
features an output level control pin, VR, which allows
for loss compensation or signal-level optimization. the
HMC744LC3 operates from a single 3.3 V supply and
is available in ROHS-compliant 3x3 mm SMT package.
General Description
Features
Functional Diagram
Inputs Terminated Internally to 50 Ohms
Differential & Single-Ended Operation
Propagation Delay: 120 ps
Fast Rise and Fall Times: 22 / 20 ps
Programmable Differential
Output Voltage Swing: 600 - 1100 mV
Low Power Consumption: 287 mW typ.
Single Supply: +3.3 V
16 Lead Ceramic 3x3 mm SMT Package: 9 mm2
Typical Applications
The HMC744LC3 is ideal for:
• RF ATE Applications
• Broadband Test & Measurement
• Serial Data Transmission up to 14 Gbps
• Clock Buffering up to 14 GHz
Electrical Specications, TA = +25 ºC, Vcc = 3.3 V, VR = 3.3 V
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage 3.0 3.3 3.6 V
Power Supply Current 87 mA
Maximum Data Rate 14 Gbps
Maximum Clock Rate 14 GHz
Input Voltage Range Vcc - 1.5 Vcc + 0.5 V
Input Differential Range 0.1 2Vp-p
Input Return Loss Frequency <14 GHz 10 dB
Output Amplitude Single-Ended, peak-to-peak 550 mVp-p
Differential, peak-to-peak 1100 mVp-p
Output High Voltage 3.29 V
Output Low Voltage 2.74 V
Output Rise / Fall Time Single-Ended, 20% - 80% 22 / 20 ps
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
2
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Electrical Specications (continued)
Parameter Conditions Min. Typ. Max Units
Output Return Loss Frequency <13 GHz 10 dB
Small Signal Gain 27 dB
Random Jitter JRrms 0.2 ps rms
Deterministic Jitter, JDδ - δ, 215-1 PRBS input [1] 2 6 ps
Propagation Delay, td 120 ps
D1 to D2 Data Skew, tSKEW <2 ps
VR Pin Current VR = 3.3 V 2 mA
VR Pin Current VR = 3.7 V 3.5 mA
[1] Deterministic jitter measured at 13 GHz with a 300 mVp-p, 215-1 PRBS input sequence.
[1] VR = 3.3 V [2] Frequency = 13 GHz [3] Vcc = 3.3 V
DC Current vs. Supply Voltage [1][2]
Rise / Fall Time vs. Supply Voltage [1][2]
70
75
80
85
90
95
100
105
110
2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7
+25C
+85C
-40C
DC CURRENT (mA)
SUPPLY VOLTAGE (V)
15
17
19
21
23
25
2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7
tr
tf
RISE/FALL TIME (ps)
SUPPLY VOLTAGE (V)
Output Differential Voltage
vs. Supply Voltage [1][2]
1000
1025
1050
1075
1100
1125
1150
1175
1200
2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7
+25C
+85C
-40C
VOUT DIFFERENTIAL (mVp-p)
SUPPLY VOLTAGE (V)
Output Differential Voltage
vs. Frequency [1][3]
400
600
800
1000
1200
1400
2 4 6 8 10 12 14 16 18
VOUT DIFFERENTIAL (mVp-p)
FREQUENCY (GHz)
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
3
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
[1] Vcc = 3.3 V [2] Frequency = 13 GHz
Input Return Loss vs. Frequency Output Return Loss vs. Frequency
Rise / Fall Time vs. VR [1][2]
Output Differential Voltage vs. VR [1][2]
-30
-25
-20
-15
-10
-5
0
0 2 4 6 8 10 12 14
RETURN LOSS (dB)
FREQUENCY (GHz)
-35
-30
-25
-20
-15
-10
-5
0
0 2 4 6 8 10 12 14
RETURN LOSS (dB)
FREQUENCY (GHz)
15
17
19
21
23
25
2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7
tr
tf
RISE/FALL TIME (ps)
VR (V)
400
600
800
1000
1200
1400
2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7
+25C
+85C
-40C
VOUT DIFFERENTIAL (mVp-p)
VR (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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
4
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Eye Diagram
Timing Diagram
Truth Table
Input Outputs
DIN D1 D2
L L L
H H H
Notes:
DIN = DINP - DINN
D1 = D1P - D1N
D2 = D2P - D2N
H - Positive differential voltage
L - Negative differential voltage
[1] Test Conditions:
Pattern generated with an Agilent N4903A Serial BERT.
Eye Diagram presented on a Tektronix CSA 8000.
Device input = 13 Gbps PN code. Both output channels shown.
Device is AC coupled to scope
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
5
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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 0.05 mm DATUM -C-
6. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.
7. PADDLE MUST BE SOLDERED TO GND.
Power Supply Voltage (Vcc) Vcc -0.5 V to +3.75 V
Input Signals Vcc -2.0 V to Vcc +0.5 V
Output Signals Vcc -1.5 V to Vcc +0.5 V
Continuous Pdiss (T = 85 °C)
(derate 17 mW/°C above 85 °C) 0.68 W
Thermal Resistance (Rth j-p) Worst
case junction to package paddle 59 °C/W
Maximum Junction Temperature 125 °C
Storage Temperature -65 °C to +150 °C
Operating Temperature -40 °C to +85 °C
ESD Sensitivity (HBM) Class 1C
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC74 4LC3 Alumina, White Gold over Nickel MSL3 [1] H744
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
6
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Pin Number Function Description Interface Schematic
1, 4, 5, 8, 9, 12 GND Signal Grounds
2, 3
10, 11
D1P, D1N
D2N, D2P
Differential Data Outputs: Current Mode Logic (CML)
referenced to positive supply.
6, 7 DINP, DINN Differential Data Inputs: Current Mode Logic (CML)
referenced to positive supply.
13, 16 Vcc Positive Supply
14,
Package Base GND Supply Ground
15 VR
Output level control. Output level may be
adjusted by applying a voltage to VR per
“Output Differential vs. VR” plot.
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
7
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Evaluation PCB
The circuit board used in the application should use
RF circuit design techniques. Signal lines should
have 50 Ohm impedance while the package gro-
und leads should be connected directly to the
ground plane similar to that shown. The exposed
packaged base should be connected to GND. 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. Install jumper on JP1 to short
VR to Vcc for normal operation.
List of Materials for Evaluation PCB 122517 [1]
Item Description
J1 - J6 PCB Mount SMA RF Connectors
J7 - J9 DC Pin
JP1 Shorting Jumper
C1, C2 4.7 µF Capacitor, Tantalum
C3 - C5 100 pF Capacitor, 0402 Pkg.
R2 10 Ohm Resistor, 0603 Pkg.
U1 HMC74 4LC3
High Speed Logic, Fanout Buffer
PCB [2] 122515 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or rogers 4350
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 On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
HIGH SPEED DIGITAL LOGIC - SMT
8
HMC744LC3
v03.0514
14 GBPS, FAST RISE TIME 1:2 FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE & POSITIVE SUPPLY
Application Circuit
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
