HMC848LC5
v02.0614
45 Gbps, 1:4 DEMUX WITH
PROGRAMMABLE OUTPUT VOLTAGE
Typical Applications Features
The HMC848LC5 is ideal for: Supports Data Rates up to 45 Gbps
SONET OC-768 Half Rate Clock Input
RF ATE Applications Quarter Rate Reference Clock Output
Broadband Test & Measurements Fast Rise and Fall Times: 25 / 21 ps
Serial Data Transmission up to 45 Gbps Programmable Differential Output
Voltage Swing: 300 - 1000 mVp-p
High Speed ADC Interfacing
Single Supply: +3.3V
2
32 Lead Ceramic 5x5 mm SMT Package: 25 mm
Functional Diagram
General Description
The HMC848LC5 is a 1:4 demultiplexer designed for
data deserialization up to 45 Gbps. The device uses
both rising and falling edges of the half-rate clock to
sample the input data in sequence, D0-D3 and latches
the data onto the differential outputs. A quarter-rate
clock output generated on-chip can be used to clock
the data into other devices.
All clock and data inputs / outputs of the HMC848LC5
are CML and terminated on-chip with 50 Ohms to the
VCC, and may be DC or AC coupled. The inputs and
outputs of the HMC848LC5 may be operated either
differentially or single-ended. The HMC848LC5 also
features an output level control pin, VCTRL, which allows
for loss compensation or signal level optimization. The
HMC848LC5 operates from a single +3.3V supply and
is available in ROHS compliant 5x5 mm SMT package.
Electrical Specifications, T = +25C, Vcc = 3.3V
A
Parameter Conditions Min. Typ. Max Units
Power Supply Voltage 5% Tolerance 3.13 3.3 3.47 V
Power Supply Current Vctrl = 2.5V 480 540 600 mA
Output Amplitude Control Voltage Range (Vctrl) 1.7 2.5 3 V
Maximum Data Rate 45 Gbps
Maximum Clock Rate Half Rate Clock 22.5 GHz
[1]
Single-Ended, peak-to-peak 150 800 mVp-p
Input Amplitude (Data)
Differential, peak-to-peak 150 1000 mVp-p
[1]
Single-Ended, peak-to-peak 100 700 mVp-p
Input Amplitude (Clock)
Differential, peak-to-peak 100 1000 mVp-p
[1] The un-used port is biased @ 3.3V
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
1
Application Support: Phone: 978-250-3343 or apps@hittite.com
MUX & DEMUX - SMTHMC848LC5
v02.0614
45 Gbps, 1:4 DEMUX WITH
PROGRAMMABLE OUTPUT VOLTAGE
Electrical Specifications, (continued)
Parameter Conditions Min. Typ. Max Units
Input High Voltage (Data & Clock) Vctrl = 2.5V 2.8 3.8 V
Input Low Voltage (Data & Clock) Vctrl = 2.5V 2.3 3.3 V
Differential, peak-to-peak
Data Output Voltage Swing Range 300 1000 mVp-p
@ 40 Gbps
Differential, peak-to-peak
Clock Output Voltage Swing 600 700 800 mVp-p
@ 10 GHz
Output High Voltage Vctrl = 2.5V 2.95 V
Output Low Voltage Vctrl = 2.5V 2.6 V
Data input up to 11.25 GHz 10 dB
Input Return Loss
Clock input up to 22.5 GHz 9 dB
Data output up to 22.5 GHz 8 dB
Output Return Loss
Clock output up to 11.25 GHz 8 dB
[2]
Deterministic Jitter, Jd 4 ps p-p
[3]
Additive Random Jitter, Jr 0.35 ps rms
[2]
Rise Time, tr 20% - 80% 25 ps
[2]
Fall Time, tf 20% - 80% 21 ps
Propagation Delay Clock to Data, Tdpd Input clock to output data 380 ps
Propagation Delay Clock to Output Clock, Tcpd Input clock to output clock 80 ps
Set Up Time, ts Both at rising and falling edges 20 ps
Hold Time, th Both at rising and falling edges 2 ps
23
[2] CKINP: 20 GHz clock signal, 250 mVp-p single-ended, INP: 40 Gbps PRBS 2 -1 pattern, 250 mVp-p single-ended
[3] Random jitter is measured with 40 Gbps 10101 pattern
Differential Output Swing
[1] [2] [1][2]
DC Current vs. Supply Voltage vs. Supply Voltage
700 1000
+25C
+25C
+85C
900
+85C
-40C
-40C
600
800
700
500
600
400 500
3.13 3.19 3.24 3.3 3.36 3.41 3.47 3.13 3.19 3.24 3.3 3.36 3.41 3.47
SUPPLY VOLTAGE Vcc (V) SUPPLY VOLTAGE Vcc (V)
[1] Vctrl = 2.5V [2] Data Rate = 40 Gbps
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
2
Application Support: Phone: 978-250-3343 or apps@hittite.com
DC CURRENT (mA)
DIFFERENTIAL VOLTAGE (mVp-p)
MUX & DEMUX - SMT