MAX3645EEE ,+2.97 to +5.5 V, 125 Mbps to 200 Mbps limiting amplifier with loss-of-signal detectorApplicationsSONET 155Mbps TransceiversTOP VIEWFast Ethernet ReceiversCAZ21 16 THFDDI 125Mbps Receiv ..
MAX3645EEE+ ,+2.97V to +5.5V, 125Mbps to 200Mbps Limiting Amplifier with Loss-of-Signal DetectorELECTRICAL CHARACTERISTICS(V = +2.97V to +5.5V, PECL outputs are terminated with 50Ω to V - 2V, R = ..
MAX3645EEE+T ,+2.97V to +5.5V, 125Mbps to 200Mbps Limiting Amplifier with Loss-of-Signal Detectorfeatures an integrated power detector♦ Output Disable Function and Automatic Squelchwith complement ..
MAX3645ESE ,+2.97 to +5.5 V, 125 Mbps to 200 Mbps limiting amplifier with loss-of-signal detectorELECTRICAL CHARACTERISTICS(V = +2.97V to +5.5V, PECL outputs are terminated with 50Ω to V - 2V, R = ..
MAX3645ESE+T ,+2.97V to +5.5V, 125Mbps to 200Mbps Limiting Amplifier with Loss-of-Signal DetectorApplications+Denotes lead-free package.SONET 155Mbps Transceivers Pin ConfigurationFast Ethernet Re ..
MAX3646ETG ,155Mbps to 622Mbps SFF/SFP Laser Driver with Extinction Ratio ControlApplicationsMODTCOMP 1 18MDMultirate OC-3 to OC-12 FEC TransceiversV 2 VCC 17 CC125Mbps Ethernet SF ..
MAX7300ATL+ ,2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O ExpanderElectrical Characteristics(Typical Operating Circuit, V = 2.5V to 5.5V, T = T to T , unless otherwi ..
MAX7300ATL+T ,2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O ExpanderFeaturesThe MAX7300 compact, serial-interfaced, I/O expansion ● 400kbps I2C-Compatible Serial Inter ..
MAX7301AAI+ ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderMAX7301 4-Wire-Interfaced, 2.5V to 5.5V,20-Port and 28-Port I/O Expander
MAX7301AAI+T ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderGeneral Description Beneits and
MAX7301AAX ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderApplicationsWhite GoodsTypical Operating CircuitAutomotiveGaming Machines 3V36 32V+ P4 I/O 4Industr ..
MAX7301AAX ,4-Wire-Interfaced, 2.5V to 5.5V, 20-Port and 28-Port I/O ExpanderFeaturesThe MAX7301 compact, serial-interfaced I/O expander♦ High-Speed 26MHz SPI-/QSPI-™/MICROWIRE ..
MAX3645EEE-MAX3645ESE
+2.97 to +5.5 V, 125 Mbps to 200 Mbps limiting amplifier with loss-of-signal detector
General DescriptionThe MAX3645 limiting amplifier functions as a data
quantizer and is pin compatible with the Mindspeed
MC2045-2 and MC2045-2Y postamplifiers. The amplifi-
er accepts a wide range of input voltages and provides
constant-level positive emitter-coupled logic (PECL)
output voltages with controlled edge speeds.
The MAX3645 features an integrated power detector
with complementary PECL loss-of-signal (LOS) outputs
that indicate when the input power level drops below a
programmable threshold. An optional squelch function
holds the data outputs at static levels during a
LOS condition.
The MAX3645 operates from a single +3.3V or +5.0V
power supply over a -40°C to +85°C temperature
range. It is available in 16-pin SO and 16-pin QSOP
packages.
ApplicationsSONET 155Mbps Transceivers
Fast Ethernet Receivers
FDDI 125Mbps Receivers
FTTx Receivers
ESCON Receivers
FeaturesPin Compatible with the Mindspeed
MC2045-2/MC2045-2Y500µV Input Sensitivity (BER = 10-12)Compatible with 4B/5B Data CodingProgrammable LOS ThresholdStable LOS Threshold Over Supply RangeOutput Disable Function and Automatic SquelchSingle +3.3V or +5.0V Power Supply18mA Supply Current
MAX3645
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
Ordering Information19-3026; Rev 0; 10/03
Pin Configuration
Typical Application Circuit
MAX3645
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VCC= +2.97V to +5.5V, PECL outputs are terminated with 50Ωto VCC- 2V, RTH= 100Ω, CAZ= 0.1µF, CSD= 1nF, TA= -40°C to
+85°C. Typical values are at VCC= +3.3V, TA = +25°C, unless otherwise noted.)
Stresses 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.
Power-Supply Voltage (VCCA, VCCE)....................-0.5V to +7.0V
Voltage at CAZ1, CAZ2, DIN+,
DIN-, CSD, DIS, TH................................-0.5V to (VCC+ 0.5V)
PECL Output Current (DOUT+, DOUT-, LOS, LOS)...........50mA
Differential Voltage between CAZ1 and CAZ2......-1.5V to +1.5V
Differential Voltage between DIN+ and DIN-........-1.5V to +1.5V
Continuous Power Dissipation (TA= +85°C)
16-Pin SO (derate 8.7mW/°C above +85°C)................565mW
16-Pin QSOP (derate 8.3mW/°C above +85°C)...........540mW
Storage Ambient Temperature Range (TS)…….-65°C to +160°C
Lead Temperature (soldering, 10s)...........……………….+300°C
MAX3645
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
Note 2:Guaranteed by design and characterization.
Note 3:Noise is derived from BER measurement.
Note 4:The data input transition time is controlled by a 4th-order Bessel filter with f-3dB= 0.75 ×data rate.
Note 5:PWD = [(width of wider pulse) - (width of narrower pulse)] / 2, measured with 155Mbps 0011 pattern.
Note 6:All LOS specifications are measured using a 155Mbps 223- 1 PRBS pattern.
Note 7:The signal at the input is switched between two amplitudes, SIGNAL_ON and SIGNAL_OFF, as shown in Figure 1.
ELECTRICAL CHARACTERISTICS (continued)(VCC= +2.97V to +5.5V, PECL outputs are terminated with 50Ωto VCC- 2V, RTH= 100Ω, CAZ= 0.1µF, CSD= 1nF, TA= -40°C to
+85°C. Typical values are at VCC= +3.3V, TA = +25°C, unless otherwise noted.)
Figure 1. Signal Levels for LOS Assert/Deassert Time
Measurement
MAX3645
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
Typical Operating Characteristics(VCC= 3.3V, PECL outputs terminated with 50Ωto VCC- 2V, RTH= 100Ω, CAZ= 0.1µF, CSD= 1nF, TA= +25°C, unless otherwise noted.)
MAX3645
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
Typical Operating Characteristics (continued)(VCC= 3.3V, PECL outputs terminated with 50Ωto VCC- 2V, RTH= 100Ω, CAZ= 0.1µF, CSD= 1nF, TA= +25°C, unless otherwise noted.)
MAX3645
Detailed DescriptionThe MAX3645 consists of gain stages, offset correction,
power detector, LOS indicators, and PECL output buffers.
See Figure 2 for the functional diagram.
Data InputThe data inputs have a single-ended input resistance of
4.8kΩand are internally DC-biased to VCC- 0.87V (see
Figure 3). External capacitors are required to AC-cou-
ple the data signals. Pattern-dependent jitter is mini-
mized by using coupling capacitor values large enough
to pass the lowest frequencies of interest (consecutive
ones and zeros) with the given input resistance.
Typically, 0.1µF coupling capacitors yield a -3dB fre-
tance variation (3.3kΩto 6.4kΩ) must be considered to
accurately calculate the -3dB frequency. Capacitor val-
ues should be chosen that set the -3dB frequency at
least a factor of 10 below the lowest frequency of inter-
est. A capacitor value of 0.1µF is recommended.
Gain Stage and Offset CorrectionThe limiting amplifier provides approximately 74dB
(RTH= 100Ω) of gain. This large gain makes the ampli-
fier susceptible to small DC offsets in the signal path.
To correct DC offsets, the amplifier has an internal feed-
back loop that acts as a DC autozero circuit. By cor-
recting the DC offsets, the limiting amplifier improves
receiver sensitivity and power-detector accuracy.
+2.97V to +5.5V, 125Mbps to 200Mbps Limiting
Amplifier with Loss-of-Signal Detector
