HMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Typical Applications Features
The HMC842LC4B is ideal for: Supports Clock Frequencies up to 28 GHz
OC-768 and SDH STM-256 Equipment Independent Programmable Output Swing for
Each Channel: 400 - 1200 mVp-p Diff.
RF ATE Applications
Supports Single-Ended or Differential Operation
Short, intermediate, & Long Haul Fiber Optic
Applications Power Consumption: 465 mW
Broadband Test & Measurement Less than 500 fs Additive RMS Jitter
Serial Data Transmission up to 45 Gbps Fast Rise and Fall Times: <12ps
2
Clock Buffering up to 28 GHz 24 Lead 4x4mm SMT Package: 16mm
Functional Diagram
General Description
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.
Electrical Specifications, T = +25C, Vee = -3.3V
A
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage 5 % Tolerance -3.47 -3.3 -3.13 V
VAC1 = VAC2 = -0.3V
Power Supply Current 120 140 160 mA
(Vout = 930 mVp-p diff @ 40 Gbps)
[1]
Output Amplitude Control Voltage
-1.4 -0.3 0 V
(VAC1, VAC2)
Maximum Data Rate 45 Gbps
Maximum Clock Rate 28 32 GHz
Single-ended, peak-to-peak 50 1000
Input Amplitude 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
For price, delivery, and to place orders: Analog Devices, Inc.,
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343 Fax: 978-250-3373 Order online at www.hittite.com
Phone: 781-329-4700 Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
1
Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
HIGH SPEED LOGIC - SMTHMC842LC4B
v03.0914
45 Gbps, FANOUT BUFFER
w/ PROGRAMMABLE OUTPUT VOLTAGE
Electrical Specifications, (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
[2]
Deterministic Jitter, Jd 3 ps, pp
@ 28 GHz Clock Input 0.3 ps rms
Additive Random Jitter Jr
@ 32 GHz Clock Input 0.6 ps rms
[2]
Rise Time, tr 11 ps
[2]
Fall Time, tf 11 ps
Propagation Delay, td 10 ps
[2]
OUT1 to OUT2 Data Skew, t 2 ps
skew
[1] VAC1=VC2 and VAC2=VC1 on evaluation board
23
[2] Data Input: 40 Gbps PRBS 2 -1 pattern, 150 mVp-p single-ended
Differential Output Swing vs.
[1] [2] [1] [2]
DC Current vs. Supply Voltage
Supply Voltage
200 1200
175 1100
150 1000
125 900
100 800
+25C +25C
+70C
+70C
-40C
-40C
75 700
50 600
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
-3.47 -3.41 -3.36 -3.3 -3.24 -3.19 -3.13
SUPPLY VOLTAGE Vee (V) SUPPLY VOLTAGE Vee (V)
[3] [1]
Differential Output Swing vs. VAC Differential Output Swing vs. Frequency
1400 1400
1200 1200
1000 1000
800 800
600 600
+25C
+70C
+25C
-40C
400 400
+70C
-40C
200 200
0 0
-1.4 -1.2 -1 -0.8 -0.6 -0.4 -0.2 0 0 4 8 12 16 20 24 28 32
CONTROL VOLTAGE VAC (V) FREQUENCY (GHz)
23
[1] VAC = -0.3V [2] Input data rate: 40 Gbps PRBS 2 -1 [3] Frequency = 20 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
For price, delivery, and to place orders: Analog Devices, Inc.,
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
rights of third parties that may result from its use. Specifications subject to change without notice. No
Phone: 978-250-3343 Fax: 978-250-3373 Order online at www.hittite.com
Phone: 781-329-4700 Order online at www.analog.com
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
2
Trademarks and registered trademarks are the property of their respective owners. Application Support: Phone: 1-800-ANALOG-D
Application Support: Phone: 978-250-3343 or RFMG-hsl@analog.com
DIFFERENTIAL VOLTAGE (mVp-p) DC CURRENT (mA)
DIFFERENTIAL VOLTAGE (mVp-p) DIFFERENTIAL VOLTAGE (mVp-p)
HIGH SPEED LOGIC - SMT