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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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
The HMC748LC3C is a 2:1 Selector designed to sup-
port data transmission rates of up to 14 Gbps, and
selector port operation of up to 14 GHz. The selector
routes one of the two single-ended inputs to the
differential output upon assertion of the proper select
port. The HMC748LC3C also features an output level
control pin, VR, that allows for loss compensation or
for signal level optimization.
All select differential inputs to the HMC748LC3C
are CML and terminated on-chip with 50 ohms to the
positive supply, Vcc, and may be AC or DC coupled.
The single-ended inputs to the HMC748LC3C are CML
terminated on-chip with 50 ohms to the positive supply,
GND, and may be 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 HMC748LC3C
operates from a single + 3.3 V supply and is available
in ROHS-compliant 3x3 mm SMT package.
General Description
Features
Functional Diagram
Supports High Data Rates: up to 14 Gbps
Single-ended inputs
Differential & Single-Ended Outputs
Fast Rise and Fall Times: 22 / 22 ps
Low Power Consumption: 250 mW typ.
Programmable Differential
Output Voltage Swing: 600 - 1200 mV
Propagation Delay: 125 ps
Single Supply: +3.3 V
16 Lead Ceramic 3x3 mm SMT Package: 9 mm2
Typical Applications
The HMC748LC3C is ideal for:
• 2:1 Multiplexer up to 14 Gbps
• RF ATE Applications
• Broadband Test & Measurement
• Serial Data Transmission up to 14 Gbps
• Redundant Path Switching
• Built-in Test
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage 3.0 3.3 3.6 V
Power Supply Current 76 mA
Maximum Data Rate 14 Gbps
Maximum Select Rate 14 GHz
Maximum Serial Transmission Rate 26 Gbps
Electrical Specications, TA = +25 °C, Vcc = 3.3 V, VR = 3.3 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
2
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
Parameter Conditions Min. Typ. Max Units
Input Vcm Vin = 600 mVp-p Vcc - 0.375 Vcc - 0.300 Vcc - 0.275 V
Input High Voltage Vcc - 0.1 Vcc - 0.5 V
Input Low Voltage Vcc - 0.1 Vcc - 0.5 V
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 3.29 V
Output Low Voltage 2.74 V
Output Rise / Fall Time Differential, 20% - 80% 22 / 22 ps
Output Return Loss Frequency <13 GHz 10 dB
Random Jitter, Jr rms [1] 0.2 ps rms
Deterministic Jitter, Jd peak-to-peak, 215-1 PRBS input [2] 2 ps, p-p
Propagation Delay, A or B to DOUT, td 125 ps
Propagation Delay Select to Data, tds 135 ps
Set Up & Hold Time, tSH 6ps
VR Pin Current VR = 3.3 V 2mA
VR Pin Current VR = 3.7 V 3.5 mA
[1] Upper limit of random jitter, Jr, determined by measuring and integrating output phase noise with a sinusoidal input at 5, 10, and 13.5 GHz over
temperature
[2] Deterministic jitter calculated by simultaneously measuring the jitter of a 200 mV, 12.5 GHz, 215-1 PRBS input, and a single-ended output
[1] VR = 3.3 V [2] Frequency = 13 GHz [3] Vcc = 3.3 V
DC Current vs. Supply Voltage [1] [2]
Output Differential Voltage
vs. Supply Voltage [1] [2]
Electrical Specications (continued)
60
70
80
90
100
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)
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)
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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
[1] Vcc = 3.3 V [2] Frequency = 13 GHz [3] Vcc = 3.3 V
Input Return Loss vs. Frequency Output Return Loss vs. Frequency
Rise / Fall Time vs. VR [1] [2]
Output Differential Voltage vs. VR [1] [2]
Rise / Fall Time vs. Supply Voltage [1] [2] Output Differential vs. Frequency [1] [3]
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)
600
700
800
900
1000
1100
1200
1300
2 4 6 8 10 12 14 16 18
VOUT DIFFERENTIAL (mVp-p)
FREQUENCY (GHz)
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)
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)
-35
-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)
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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
Eye Diagram
Timing Diagram Truth Table
Inputs Outputs
SDP
H A -> D
LB -> D
H - Positive voltage level
L - Negative voltage level
Notes:
D = DP - DN
S = SP - SN
[1] Test Conditions:
Waveform generated with an Agilent N4903A J-Bert.
Rate = 13 GHz
Eye Diagram data presented on a Tektronix CSA 8000
Device is AC coupled to scope.
Select Port Return Loss vs. Frequency
-30
-25
-20
-15
-10
-5
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
5
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR 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 1B
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC748LC3C Alumina, White Gold over Nickel MSL3 [1] H748
XXXX
[1] Max peak reow 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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
Pin Number Function Description Interface Schematic
1, 4, 5, 8, 9, 12 GND Signal Grounds
2, 3 AP, BP Single-Ended Data Inputs: Current Mode Logic (CML)
referenced to positive supply.
6, 7 SP, S N Differential Select Inputs: Current Mode Logic (CML)
referenced to positive supply.
10, 11 DN, DP Differential Data Outputs: 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
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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
Evaluation PCB
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 HMC748LC3C
High Speed Logic, 2:1 Selector
PCB [2] 122515 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350
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
package 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.
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
HMC748LC3C
v05.0514
14 Gbps, 2:1 SELECTOR w/ PROGRAMMABLE
OUTPUT VOLTAGE & POSITIVE SUPPLY
Application Circuit
