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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 LOGIC - SMT
1
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
The HMC724LC3 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 and outputs are DC coupled and terminated on
chip with 50 Ohm resistors to ground. The outputs may
be used in either single ended or differential modes,
and should be AC or DC coupled into 50 Ohm resistors
connected to ground.
All differential inputs to the HMC724LC3 are CML and
terminated on-chip with 50 Ohms to the positive supply,
GND, and may be DC or AC coupled. The differential
CMl outputs are source terminated to to 50 Ohms
and may also be AC or DC coupled. Outputs can be
connected directly to a 50 Ohm ground-terminated
system or drive devices with CML logic input. The
HMC724LC3 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 Inputs are DC Coupled
Propagation Delay: 110 ps
Fast Rise and Fall Times: 19 / 18 ps
Power Dissipation: 300 mW
16 Lead Ceramic 3x3 mm SMT Package: 9 mm2
Typical Applications
The HMC724LC3 is ideal for:
• 16 G Fiber Channel
• RF ATE Applications
• Broadband Test & Measurement
• Serial Data Transmission up to 14 Gbps
• Clock Buffering up to 14 GHz
Electrical Specications, TA = +25 ºC, Vee = -3.3 V
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage -3.6 -3.3 -3.0 V
Power Supply Current 90 mA
Maximum Data Rate 14 Gbps
Maximum Clock Rate 14 GHz
Input Voltage Range -1.5 0.5 V
Input Differential Range 0.1 2.0 Vp-p
Input Return Loss Frequency <14 GHz 10 dB
Output Amplitude Single-Ended, peak-to-peak 550 mVp-p
Differential, peak-to-peak 110 0 mVp-p
Output High Voltage -10 mV
Output Low Voltage -560 mV
Output Rise / Fall Time Single-Ended, 20% - 80% 19 / 18 ps
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 LOGIC - SMT
2
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
Electrical Specications (continued)
[1] Data rate = 13 Gbps [2] Frequency = 10 GHz [3] Vee = 3.3 V
DC Current vs. Supply Voltage [1]
Output Differential Voltage vs. Frequency [3] Rise / Fall Time vs. Supply [1]
Parameter Conditions Min. Typ. Max Units
Output Return Loss Frequency <14 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 110 ps
D1 to D2 Data Skew, tSKEW <2 ps
[1] Deterministic jitter measured at 13 GHz with a 300 mVp-p, 215-1 PRBS input sequence.
Output Differential Voltage
vs. Supply Voltage [2]
70
75
80
85
90
95
100
105
110
-3.7 -3.6 -3.5 -3.4 -3.3 -3.2 -3.1 -3 -2.9
+25C
+85C
-40C
DC CURRENT (mA)
SUPPLY VOLTAGE (V)
900
1000
1100
1200
1300
1400
1500
-3.7 -3.6 -3.5 -3.4 -3.3 -3.2 -3.1 -3 -2.9
+25C
+85C
-40C
VOUT DIFFERENTIAL (mVp-p)
SUPPLY VOLTAGE (V)
600
700
800
900
1000
1100
1200
1300
2 4 6 8 10 12 14 16
VOUT DIFFERENTIAL (mVp-p)
FREQUENCY (GHz)
15
17
19
21
23
25
-3.7 -3.6 -3.5 -3.4 -3.3 -3.2 -3.1 -3 -2.9
tr
tf
RISE/FALL TIME (ps)
SUPPLY VOLTAGE (V)
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 LOGIC - SMT
3
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
Input Return Loss vs. FrequencyOutput Return Loss vs. Frequency
-40
-35
-30
-25
-20
-15
-10
-5
0
0 2 4 6 8 10 12 14
RETURN LOSS (dB)
FREQUENCY (GHz)
-50
-40
-30
-20
-10
0
0 2 4 6 8 10 12 14
RETURN LOSS (dB)
FREQUENCY (GHz)
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 LOGIC - SMT
4
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
Eye Diagram
Timing Diagram
[1] Test Conditions:
Pattern generated with an Agilent N4903A Serial BERT.
Eye Diagram presented on a Tektronix CSA 8000.
Device input = 10 Gbps PN code, Vin = 300 mVp-p differential.
Both output channels shown.
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 LOGIC - SMT
5
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
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 (Vee) -3.75 V to +0.5 V
Input Signals -2 V to +0.5 V
Output Signals -1.5 V to +1 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]
HMC724LC3 Alumina, White Gold over Nickel MSL3 [1] H724
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
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 LOGIC - SMT
6
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
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 Vee Negative Supply
14,
Package Base GND Supply Ground
15 N/C No Connection required. This pin may be connected
to RF/DC ground without affecting performance.
[1] Contact HMC for alternate pinouts
Pin Descriptions [1]
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 LOGIC - SMT
7
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
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.
List of Materials for Evaluation PCB 122520 [1]
Item Description
J1 - J6 PCB Mount SMA RF Connectors
J7, J 9 DC Pin
C1 4.7 µF Capacitor, Tantalum
C5 100 pF, Capacitor 0402 Pkg.
U1 HMC724LC3
High Speed Logic, Fanout Buffer
PCB [2] 122518 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350
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 LOGIC - SMT
8
HMC724LC3
v03.0514
14 GBPS FAST RISE TIME
1:2 FANOUT BUFFER
Application Circuit
