MAX3784AUGE ,+3.3 V, 5 Gbps, PC board equalizerApplicationsChassis Life ExtensionTOP VIEW4.25Gbps Fibre Channel16 15 14 134x Multiplexed 1.25Gbps ..
MAX3784AUTE+ ,5Gbps PCB EqualizerELECTRICAL CHARACTERISTICS(V = +3V to +3.6V, T = 0°C to +85°C. Typical values are at V = +3.3V and ..
MAX3784AUTE+T ,5Gbps PCB EqualizerFeaturesThe MAX3784/MAX3784A 5Gbps equalizers provide♦ Spans 40in (1m) of FR-4 PCBcompensation for ..
MAX3784UGE-T ,5Gbps PCB EqualizerApplicationsChassis Life ExtensionTOP VIEW4.25Gbps Fibre Channel12 11 9104x Multiplexed 1.25Gbps Et ..
MAX3785UTT+ ,6.25Gbps, 1.8V PC Board EqualizerApplicationsPin ConfigurationsHSBI for ≤ 6.4GbpsTOP VIEW (BUMPS ON BOTTOM OF DIE)Double IEEE 802.3a ..
MAX3786UTJ ,1.5Gbps Serial ATA-Compatible Mux/Buffer with Loopback and EqualizationMAX378619-2727; Rev 2; 6/041.5Gbps Serial ATA-Compatible Mux/Buffer withLoopback and Equalization
MAX7367EUP+ ,4-Channel I²C Switches/MultiplexerFeatures♦ Four-Channel, Bidirectional Bus ExpansionThe MAX7367/MAX7368/MAX7369 bidirectional, four- ..
MAX7367EUP+ ,4-Channel I²C Switches/MultiplexerApplications+A0 1 20 VDDServersA1 2 19 SDARAIDRESET 3 18 SCLCellular PhonesBase Stations INT0 4 MAX ..
MAX7369EUP+ ,4-Channel I²C Switches/MultiplexerMAX7367/MAX7368/MAX736919-0644; Rev 2; 2/0924-Channel I C Switches/Multiplexer
MAX7369EUP+T ,4-Channel I²C Switches/MultiplexerFeatures♦ Four-Channel, Bidirectional Bus ExpansionThe MAX7367/MAX7368/MAX7369 bidirectional, four- ..
MAX736CPD ,-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulatorsapplications.
The MAX736/MAX737/MAX739 have fixed outputs of -12V,
-15V, and -5V respectively. ..
MAX736CPD ,-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulatorsfeatures, along with
high efficiency and an application circuit that lends itself to
miniaturizat ..
MAX3784AUGE
+3.3 V, 5 Gbps, PC board equalizer
General DescriptionThe MAX3784/MAX3784A 5Gbps equalizers provide
compensation for transmission-medium losses in up to
40in of FR4. They are optimized for short-run length and
balanced codes such as 8b10b, as found in multi-
plexed 1.25Gbps Ethernet systems and 4.25Gbps
Fibre Channel.
The equalizers use differential CML data inputs and
outputs. A standby mode reduces power consumption
when the parts are not in use. The MAX3784/
MAX3784A are available in a 4mm ×4mm, 16-pin QFN
package that consumes only 185mW at +3.3V.
FeaturesSpans 40in (1m) of FR4 PC Board0.18UI Deterministic Jitter Up to 40inLow Power Consumption: 185mW (MAX3784)Equalization Reduces Intersymbol Interference Single +3.3V SupplyStandby Mode Small 4mm ×4mm, 16-Pin QFN Package
MAX3784/MAX3784A
5Gbps PC Board Equalizer
Pin Configuration
Typical Application Circuit19-2565; Rev 2; 7/04
Ordering Information
ApplicationsChassis Life Extension
4.25Gbps Fibre Channel
4x Multiplexed 1.25Gbps Ethernet (5Gbps)
MAX3784/MAX3784A
5Gbps PC Board Equalizer
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage, VCC.................................................-0.5V to +6V
Input Voltage............................................(-0.5V) to (VCC+ 0.5V)
Continuous Output Current...............................-25mA to +25mA
Continuous Power Dissipation (TA= +85°C)
16-Pin QFN (derate 25mW/°C above +85°C)............1600mW
Operating Ambient Temperature Range................0°C to +85°C
Storage Temperature Range.............................-55°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3784/MAX3784A
5Gbps PC Board Equalizer
ELECTRICAL CHARACTERISTICS (continued)(VCC= +3V to +3.6V, TA= 0°C to +85°C. Typical values are at VCC= +3.3V and TA= +25°C, unless otherwise noted.)
Note 2:Test pattern. This is a combination of K28.5±characters running at the full bit rate and at one-quarter the bit rate. This simu-
lates the multiplexing of four each 1.25Gbps Ethernet data streams.
Pattern (hex) 100 bits
00 FFFF F0F0 FF 0000 0F0F(quarter rate K28.5+, quarter rate K28.5-)
3EB05(K28.5±00 1111 1010 11 0000 0101)
Note 3:Difference in deterministic jitter between reference points A and C in Figure 1.
Note 4:Signal source amplitude range is 400mVP-Pto 1000mVP-Pdifferential. Signal is applied differentially at point A as shown in
Figure 1. The deterministic jitter at point B must be from media-induced loss and not from clock-source modulation.
Deterministic jitter is measured at the 50% vertical level of the signal at point C.
Note 5:Guaranteed by design and characterization.
Note 6:Test pattern is K28.5 with 40in trace.
Note 7:On-chip pullup resistor of 40kΩ(typ). Negative current indicates equalizer sources current.
Note 8:Using 00 0001 1111 or equivalent pattern. Measured over entire input voltage range, max and min media loss and within 2in
of output pins.
Figure 1. Test Conditions
Table 1. PC Board Assumptions (PC board material is FR4)
MAX3784/MAX3784A
5Gbps PC Board Equalizer
Typical Operating Characteristics(VCC= +3.3V, measurements done at 5Gbps, 800mVP-Pboard input with 100-bit pattern from Note 2 of the EC Table,TA= +25°C,
unless otherwise noted.)
Detailed Description
General Theory of OperationThe MAX3784/MAX3784A adaptive equalizers extend
the reach of transmission lines in high-frequency back-
plane interconnect applications. They can be used for
4.25Gbps Fibre Channel, 4x 1.25Gbps Ethernet (5Gbps)
and other NRZ, 8b10b or short (≤20 bits) CID data
types. Internally, the MAX3784/MAX3784A are com-
prised of an equalizer control loop and limiting output
driver. The equalizer block reduces intersymbol interfer-
ence (ISI), compensating for frequency-dependent
media-induced loss. The equalization control detects the
spectral contents of the input signal and provides a con-
trol voltage to the equalizer core, adapting it to different
media. The equalizer operation is optimized for short-run,
DC-balanced transmission codes.
Standby ModeStandby saves power when the equalizer is not in use.
The EN logic input must be set high or open for normal
operation. Logic low at EN forces the equalizer into the
standby state.
CML Input and Output BuffersThe input and output buffers are implemented using cur-
rent-mode logic (CML). Equivalent circuits are shown in
Figures 3 and 4. For details on interfacing with CML, see
Maxim Application Note HFAN-1.0: Interfacing Between
CML, PECL, and LVDS. The common-mode voltage of
the input and output is above +2.5V. AC-coupling
capacitors are required when interfacing this part with
devices terminated in voltages such as +1.8V. Values of
0.10µF or greater are recommended.
MAX3784/MAX3784A
5Gbps PC Board Equalizer
MAX3784/MAX3784A
Applications Information
Alternate Data RatesThe MAX3784/MAX3784A is optimized for automatic
operation at 5Gbps. Equalization at other data rates,
such as 1.25Gbps and 2.5Gbps, is possible. See the
Typical Operating Characteristicsfor Deterministic Jitter
vs. Line Length and Deterministic Jitter vs. Amplitude
for typical performance at these data rates.
Layout ConsiderationsCircuit board layout and design can significantly affect
the MAX3784/MAX3784As’ performance. Use good
high-frequency design techniques, including minimiz-
ing ground inductance and connections and using con-
trolled-impedance transmission lines for the
high-frequency data signals. Route signals differentially
to reduce EMI susceptibility and crosstalk. Solder the
exposed pad to supply ground for proper thermal and
electrical operation.
Place power-supply decoupling capacitors as close as
possible to the VCCpins.
5Gbps PC Board Equalizer
