HMC855LC5 Datasheet, PDF (1/8 Pages) Hittite Microwave Corporation – 28 Gbps, 1:4 DEMUX WITH PROGRAMMABLE OUTPUT VOLTAGE

HMC855LC5
v00.0610
28 Gbps, 1:4 DEMUX
WITH PROGRAMMABLE OUTPUT VOLTAGE
3
3-1
Typical Applications
The HMC855LC5 is ideal for:
• SONET OC-192
• Broadband Test & Measurement
• Serial Data Transmission up to 28 Gbps
• FPGA Interfacing
Features
Differential & Singe-Ended Operation
Half Rate Clock Input
Quarter Rate Reference Clock Output
Fast Rise and Fall Times: 22 ps
Low Power Consumption: 644 mW typ.
Programmable Differential
Output Voltage Swing: 450 - 1144 mV
Single Supply: -3.3V
32 Lead Ceramic 5x5 mm SMT Package: 25 mm²
Functional Diagram
General Description
The HMC855LC5 is a 1:4 demultiplexer designed for
data deserialization up to 28 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. The demux is DC coupled
supporting broadband operation.
All clock and data inputs to the HMC855LC5 are CML
and terminated on-chip with 50 Ohms to the positive
supply, GND, and may be DC or AC coupled. The
differential 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
HMC855LC5 also features an output level control
pin, VR, which allows for loss compensation or signal
level optimization. The HMC855LC5 operates from a
single -3.3V supply and is available in RoHS compliant
5x5 mm SMT package.
Electrical Specifications, T_A = +25°C, Vee = -3.3V, VR = 0V
Parameter
Conditions
Min.
Typ.
Power Supply Voltage
-3.6
-3.3
Power Supply Current
195
Maximum Data Rate
28
Maximum Clock Rate, Half Rate
14
Input Voltage Range, CML
-1.5
Input Differential Voltage
100
Output Rise / Fall Time
Differential, 20% - 80%
22
Input Return Loss
Frequency <28 GHz
10
Max
-3.0
0.5
2000
Units
V
mA
Gbps
GHz
V
mV
ps
dB
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]