HMC857LC5
v04.0914
HIGH SPEED LOGIC - SMT
14 Gbps, 2 x 2 CROSSPOINT SWITCH
WITH PROGRAMMABLE OUTPUT VOLTAGE
Typical Applications
Features
The HMC857LC5 is ideal for:
Supports High Data Rates: up to 14 Gbps
• SONET OC-192 and 10 GbE
Differential or Single-Ended Inputs / Outputs
• 16G Fiber Channel
Fast Rise and Fall Times: 21 / 21 ps
• Networking & Storage
Low Power Consumption: 345 mW typ.
• Dual 2:1 Selector
Programmable Differential
Output Voltage Swing: 475 - 1200 mVp-p
• 1:2 Fanout with Input Mux
Propagation Delay: 117 ps
Single Supply: -3.3 V
32 Lead Ceramic 5 x 5 mm SMT Package: 25 mm 2
Functional Diagram
General Description
The HMC857LC5 is a 2x2 Crosspoint Switch designed to support data transmission rates of up to
14 Gbps and selector port operation up to 14 GHz.
The selector routes the differential inputs to either
one or both of the desired outputs upon assertion of
the appropriately selected port.
All differential inputs to the HMC857LC5 are CML
and terminated on-chip with 50 Ohms to the positive
supply, GND, and may be DC or AC coupled. Outputs
can be connected directly to a 50 Ohm groundterminated system or drive devices with CML logic
input. The HMC857LC5 also features an output level
control pin, VR, which allows for loss compensation or
signal level optimization. The HMC857LC5 operates
from a single -3.3 V supply and is available in ROHScompliant 3x3 mm SMT package.
Electrical Specifications, TA = +25 °C, Vee = -3.3 V, Vr = 0 V
Parameter
Conditions
Power Supply Voltage
Min.
Typ.
Max
-3.6
-3.3
-3.0
V
Power Supply Current
105
mA
Maximum Data Rate
14
Gbps
Maximum Select Rate
14
GHz
Input Voltage Range
-1.5
0.5
V
Input Differential Range
0.1
2.0
Vp-p
Input Return Loss
Output Amplitude
1
Units
Frequency A
L
X
IN0 ->B
H
X
IN1 -> B
H = Positive voltage level
L = Negative voltage level
Notes:
D = DP - DN
IN0 = IN0P - IN0N
IN1 = IN1P - IN1N
[1] VR = 0.0 V
[2] Device measured on evaluation board with port extensions
[3] Vee = -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
4
HMC857LC5
v04.0914
14 Gbps, 2 x 2 CROSSPOINT SWITCH
WITH PROGRAMMABLE OUTPUT VOLTAGE
HIGH SPEED LOGIC - SMT
Absolute Maximum Ratings
Power Supply Voltage (Vee)
-3.75 V to +0.5 V
Input Signals
-2.0 V to 0.5 V
Output Signals
-1.5 V to 0.5 V
Junction Temperature
125 °C
Continuous Pdiss (T = 85 °C
(derate 33.0 mW/°C above 85 °C)
1.33 W
Thermal Resistance (Rth j-p)
Worst case device to package paddle
30 °C/W
Storage Temperature
-65 °C to +150 °C
Operating Temperature
-40 °C to +85 °C
ESD Sensitivity (HBM)
Class 1B
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 0.05mm DATUM -C6. ALL GROUND LEADS MUST BE SOLDERED TO PCB RF GROUND.
7. PADDLE MUST BE SOLDERED TO Vee.
Package Information
Part Number
Package Body Material
Lead Finish
HMC857LC5
Alumina, White
Gold over Nickel
MSL Rating
MSL3
[1]
Package Marking [2]
H857
XXXX
[1] Max peak reflow temperature of 260 °C
[2] 4-Digit lot number XXXX
5
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
HMC857LC5
v04.0914
14 Gbps, 2 x 2 CROSSPOINT SWITCH
WITH PROGRAMMABLE OUTPUT VOLTAGE
Pin Descriptions
Function
Description
1, 4, 5, 8, 11, 14,
17, 20, 21, 24
GND
Signal Grounds
2, 3,
6, 7
In0+, In0-,
In1+, In1-
Differential Inputs: Current Mode Logic (CML)
referenced to positive supply.
9, 10,
15, 16
SelB+, SelB-,
SelA+, SelA-
Differential Select Inputs: Current Mode Logic (CML)
referenced to positive supply.
12, 13, 25, 29,
32
N/C
No connection necessary. These pins may be connected to
RF/DC ground without affecting performance.
18, 19,
22, 23
OutB-, OutB+,
OutA-, OutA+
Differential Outputs: Current Mode Logic (CML)
referenced to positive supply.
26, 31
GND
Supply Ground
27, 30
Package Base
Vee
These pins and the exposed paddle must be
connected to the negative voltage supply.
28
VR
Output level control. Output level may be increased
or decreased by applying a voltage to VR per “Output
Differential vs. VR” plot.
Interface Schematic
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
Pin Number
6
HMC857LC5
v04.0914
14 Gbps, 2 x 2 CROSSPOINT SWITCH
WITH PROGRAMMABLE OUTPUT VOLTAGE
HIGH SPEED LOGIC - SMT
Evaluation PCB
List of Materials for Evaluation PCB 126968 [1]
Item
Description
J1 - J6, J9 - J14
PCB Mount SMA RF Connectors
J15 - J20
DC Pin
JP1
0.1” Header with Shorting Jumper
C1, C2
4.7 µF Capacitor, Tantalum
C3 - C5
330 pF Capacitor, 0402 Pkg.
R1
10 Ohm Resistor, 0603 Pkg.
U1
HMC857LC5 2 x 2 Crossbar Switch
PCB [2]
126966 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350
7
The circuit board used in the application should use
RF circuit design techniques. Signal lines should
have 50 Ohm impedance while the package ground leads should be connected directly to the
ground plane similar to that shown. The exposed
package 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.
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
HMC857LC5
v04.0914
14 Gbps, 2 x 2 CROSSPOINT SWITCH
WITH PROGRAMMABLE OUTPUT VOLTAGE
HIGH SPEED LOGIC - SMT
Application Circuit
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
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