The MAX9955 high-speed, dual comparator/terminator
IC includes a dual comparator and a terminator for
each channel. The dual comparator features programmable
cable-droop compensation at its input and offers
low dispersion (timing variation) over a wide variety of
input conditions, programmable hysteresis, and differential
outputs. The terminator provides a 50 buffered termination to a programmed level. The MAX9955 comparator
operating range is -1.1V to +3.6V, and the terminator
operating range is -1.0V to +3.5V.
The MAX9955 comparator provides high-speed, open-collector
outputs with internal 50 termination resistors that are compatible with doubly terminated 0.4VP-P
(typ) CML. These features significantly reduce the discrete
component count on the circuit board.
The MAX9955 power dissipation is only 800mW per
channel under static conditions and 850mW per channel
at 2Gbps toggling conditions. The device is available
in a 64-pin, 10mm x 10mm body and 0.5mm pitch
TQFP. A 5mm x 5mm exposed die paddle on the top of
the package facilitates efficient heat removal. The
device is specified to operate with an internal die temperature
of +50°C to +90°C, and features a die temperature
monitor output.
Key Features
Applications/Uses
Cable-Droop Compensation
55ps Input Equivalent Rise/Fall Time
190ps Minimum Pulse Width
Low Power Dissipation
850mW per Channel at 2Gbps (typ)
Low Timing Dispersion
Integrated Terminator
Comparator Hysteresis Control from 0 to 10mV
High-Performance Memory Automated Test Equipment (DDR3, GDDR3, GDDR4)
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-4 of 4
MAX9955
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Status
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX9955BDCCB+D
Active
TQFP-EU;64 pin;144 mm²
Outline Drawing: 21-0162 (PDF)
Land Pattern: 90-0164 (PDF)
Use pkgcode/variation: C64E+4R*
buffered termination to a programmed level. The MAX9955 comparator
operating range is -1.1V to +3.6V, and the terminator
operating range is -1.0V to +3.5V.