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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
MUX & DEMUX - SMT
1
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
The HMC955LC4B is a 1 to 2 Demux designed to
support data transmission rates up to 32 Gbps. The
demux uses both rising and falling edges of the half-rate
clock to sample the data in sequence 01-02 and latches
the data on the rising edge into the differential outputs.
The demux also has high-speed clock synchronous
invert input that allows for scrambling of the data. The
HMC955LC4B also features an output level control pin,
VR, which allows for loss compensation or for signal-
level optimization.
All differential inputs to the HMC955LC4B are CML
and terminated on-chip with 50 Ohms to the positive
supply, GND, 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 ground-terminated
system or drive devices with CML logic input. The
HMC955LC4B operates from a single -3.3 V supply
and is available in a ceramic ROHS-compliant 4x4 mm
SMT package.
General Description
Features
Functional Diagram
Supports Data Rates up to 32 Gbps
660 mW Power Consumption
-3.3 V or +3.3 V Operation is Available
Supports Single-Ended and Differential Operation
24 Lead Ceramic 4x4 mm SMT Package: 16 mm2
Invert Port Allows Scrambling for SERDES
Application
Typical Applications
The HMC955LC4B is ideal for:
• SONET OC-192
• Broadband Test & Measurement Equipment
• FPGA Interfacing Circuitry
• 16 G and 32 G Fiber Channel
• 100 Gbit Ethernet
• ADC Encoder
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage (Vee) -3.6 -3.3 -3.0 V
Power Supply Current 200 mA
Maximum Data Rate 32 Gbps
Maximum Clock Rate 16 GHz
Input Voltage Range, C and DIN -1.5 0.5 V
Input Differential Range, C and DIN 0.1 2.0 Vp-p
Data Input Return Loss Frequency <26 Gbps 10 dB
Clock Input Return Loss Frequency <16 GHz 10 dB
Invert Input Return Loss Frequency <16 GHz 10 dB
Electrical Specications, TA = +25 ºC, Vee = -3.3 V, VR = 0 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
MUX & DEMUX - SMT
2
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
Parameter Conditions Min. Typ. Max Units
Output Amplitude Single-Ended, peak-to-peak 500 mVp-p
Differential, peak-to-peak 1000 mVp-p
Output High Voltage -25 mV
Output Low Voltage -525 mV
Output Rise / Fall Time Single-Ended, 20% - 80% 19 ps
Output Return Loss Frequency <26 Gbps 10 dB
Random Jitter JRrms [1] <0.2 ps rms
VR Pin Current VR = 0.0 V 3 mA
Deterministic Jitter, JDδ - δ, 27-1 PRBS input [1] <3 ps
Propagation Delay, tcpd Rising Edge 119 ps
Data Setup Time, ts1ps
Data Hold Time, th7ps
Invert Setup Time, tis 0ps
Invert Hold Time, tih 11 ps
[1] Jitter captured at 13 Gbps, 27-1 PRBS input.
[1] VR = 0.0 V [2] Frequency = 16 Gbps [3] Vee = -3.3 V
Electrical Specications (continued)
DC Current vs. Supply Voltage [1][2] DC Current vs. VR [2][3]
150
175
200
225
250
-1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4
+25C
+85C
-40C
DC CURRENT (mA)
VR (V)
140
160
180
200
220
240
260
-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)
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
MUX & DEMUX - SMT
3
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
[1] VR = 0.0V [2] Frequency = 16 Gbps output [3] Device measured on evaluation board with gating after connector
[4] Vee = -3.3 V
Rise / Fall Time vs. VR [2][4]
Rise / Fall Time vs. Supply Voltage [1][2]
Clock Input Return Loss vs.
Frequency [1][3][4]
14
16
18
20
22
-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)
12
14
16
18
20
22
-1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4
tr
tf
RISE/FALL TIME (ps)
SUPPLY VOLTAGE (V)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
0 3 6 9 12 15 18 21 24 27
Device
Eval Board
RETURN LOSS (dB)
FREQUENCY (GHz)
-40
-35
-30
-25
-20
-15
-10
-5
0
5
0 3 6 9 12 15 18 21 24 27
Device
Eval Board
RETURN LOSS (dB)
FREQUENCY (GHz)
Output Differential vs. VR [2][4]
Data Output Differential vs.
Supply Voltage [1][2]
500
600
700
800
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)
400
500
600
700
800
900
1000
1100
1200
1300
1400
-1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4
+25C
+85C
-40C
VOUT DIFFERENTIAL (mVp-p)
VR (V)
Data Output Return Loss vs.
Frequency [1][3][4]
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
MUX & DEMUX - SMT
4
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
Eye Diagram, 16 Gbps
[1] Test Conditions:
Single-ended 200 mV, 32 Gbps data input;16 GHz clock input
Pattern generated with a 27-1 quasi PN, 32 Gbps PRBS pattern
Resulting in 16 Gbps, 27-1 quasi PN output measured with
Tektronix CSA 8000
Timing Diagram
Data Input Return Loss vs.
Frequency [1][3][4]
-40
-35
-30
-25
-20
-15
-10
-5
0
5
0 3 6 9 12 15 18 21 24 27
Device
Eval Board
RETURN LOSS (dB)
FREQUENCY (GHz)
Invert Input Return Loss vs.
Frequency [1][3][4]
-40
-35
-30
-25
-20
-15
-10
-5
0
5
0 3 6 9 12 15 18 21 24 27
Device
Eval Board
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
MUX & DEMUX - SMT
5
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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
Junction Temperature 125 °C
Continuous Pdiss (T=85 °C)
(derate 30 mW/°C above 85 °C 1.22 W
Thermal Resistance (Rth j-p)
Worse case junction to package
paddle
32.8 °C/W
Storage Temperature -65 °C to +150 °C
Operating Temperature -40 °C to +85 °C
ESD Sensitivity (HBM) Class 1B
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. EXPOSED PADDLE MUST BE SOLDERED TO VEE
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC955LC4B Alumina, White Gold over Nickel MSL3 [1] H955
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
MUX & DEMUX - SMT
6
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
Pin Number Function Description Interface Schematic
1, 6, 8, 11, 13, 18 GND Signal Grounds
2, 3
4, 5
9, 10
D P, D N
C P, C N
IP, I N
Differential Data Inputs: Current Mode Logic (CML)
referenced to positive supply.
7, 12, 22 N/C
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
14, 15
16, 17
O2N, O2P
O1N, O1P
Differential Outputs: Current Mode Logic (CML) referenced
to positive supply
19, 24 GND Supply Grounds
20, 23
Package Base Vee These pins and the exposed paddle must be
connected to the negative voltage supply.
21 VR
Output level control. Output level may be increased
or decreased 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
MUX & DEMUX - SMT
7
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
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 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. Install jumper on JP1 to short
VR to GND for normal operation.
List of Materials for
Evaluation PCB EVAL01-HMC955LC4B [1]
Item Description
J1 - J10 PCB Mount 2.92 mm RF Connectors
J15 - J18 DC Pin
JP1 0.1” Header with Shorting Jumper
C1, C2 4.7 µF Capacitor, Tantalum
C3 - C5 330 pF, Capacitor, 0603 Pkg
R1 10 Ohm Resistor, 0603 Pkg.
U1 HMC955LC4B
High Speed Logic, 1:2 Demux
PCB [2] 126570 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350
Evaluation PCB
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
MUX & DEMUX - SMT
8
HMC955LC4B
v00.0511
32 Gbps, 1:2 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
Application Circuit
