MAX3640UCM ,3.3V, 622Mbps LVDS, Dual 4:2 Crosspoint SwitchELECTRICAL CHARACTERISTICS(V = +3.0V to 3.6V, LVDS differential load = 100Ω ±1%, T = 0°C to +85°C. ..
MAX3640UCM ,3.3V, 622Mbps LVDS, Dual 4:2 Crosspoint SwitchApplications Ordering InformationSONET/SDH BackplanesPART TEMP. RANGE PIN-PACKAGEMAX3640UCM 0°C to ..
MAX3640UCM+ ,3.3V, 622Mbps LVDS, Dual 4:2 Crosspoint SwitchFeaturesThe MAX3640 is a dual-path crosspoint switch for use Single +3.3V Supplyat OC-12 data rate ..
MAX3643ETG+T ,155Mbps to 2.5Gbps Burst-Mode Laser DriverApplicationsPin Configuration appears at end of data sheet.A/B/G/XGPON ONT Modules Up to 2.5Gbps1.2 ..
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 = ..
MAX729CCK ,5V/3.3V/3V 2A Step-Down / PWM / Switch-Mode DC-DC RegulatorsApplicationsMAX727ECK -40°C to +85°C 5 TO-220Distributed Power from High-Voltage BusesMAX728CCK 0°C ..
MAX730 ,5V / Step-Down / Current-Mode PWM DC-DC ConvertersFeaturesThe MAX730A/MAX738A/MAX744A are 5V-output' 750mA Load Currents (MAX738A/MAX744A)CMOS, step- ..
MAX7300AAX+ ,2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O ExpanderMAX7300 2-Wire-Interfaced, 2.5V to 5.5V,20-Port or 28-Port I/O Expander
MAX7300ATL , 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
MAX7300ATL , 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander
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 ..
MAX3640UCM-MAX3640UCM+
3.3V, 622Mbps LVDS, Dual 4:2 Crosspoint Switch
General DescriptionThe MAX3640 is a dual-path crosspoint switch for use
at OC-12 data rates. The MAX3640 can be used to
receive and transmit 622Mbps low-voltage differential
signals (LVDS) across a backplane with minimum jitter
accumulation. Each path incorporates input buffers,
multiplexers, a crosspoint switch, and output drivers.
The four output channels have a redundant set of out-
puts for test or fanning purposes. The device offers sig-
nal-path redundancy for critical data streams.
The MAX3640 has a unique power-saving feature.
When a set of four output channels has been de-select-
ed, the output drivers are powered down to reduce
power consumption by 165mW. The fully differential
architecture ensures low crosstalk, jitter accumulation,
and signal skew.
The MAX3640 is available in a 48-pin TQFP package
and operates from a +3.3V supply over the 0°C to
+85°C temperature range.
ApplicationsSONET/SDH Backplanes
High-Speed Parallel Links
Digital Cross-Connects
System Interconnects
ATM Switch Cores
FeaturesSingle +3.3V Supply257mW Power Consumption (four output
channels enabled)2.8psRMSOutput Random Jitter42ps Output Deterministic JitterPower-Down Feature for Deselected Outputs110ps Channel-to-Channel Skew240ps Output Edge Speed LVDS Inputs/Outputs LVDS Output 3-State Enable
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint Switch
Typical Operating Circuit19-4800; Rev 0; 3/00
Ordering Information
Pin Configuration appears at end of data sheet.
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint Switch
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +3.0V to 3.6V, LVDS differential load = 100Ω±1%, TA= 0°C to +85°C. Typical values are at VCC= +3.3V, TA= +25°C,
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.
Supply Voltage, VCC................................................-0.5V to 5.0V
Input Voltage (LVDS, TTL)..........................-0.5V to (VCC+ 0.5V)
Output Voltage (LVDS)...............................-0.5V to (VCC+ 0.5V)
Continuous Power Dissipation (TA= +85°C)
48-Pin TQFP (derate 12.5mW/°C).................................813mW
Operating Temperature Range...............................0°C to +85°C
Storage Temperature Range............................-55°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint Switch
AC ELECTRICAL CHARACTERISTICS(VCC= +3.0V to 3.6V, LVDS differential load = 100Ω±1%, TA= 0°C to +85°C. Typical values are at VCC= +3.3V, TA= +25°C,
Note 1:AC characteristics are guaranteed by design and characterization.
Note 2:Deterministic jitter (DJ) is the arithmetic sum of pattern-dependent jitter and pulse-width distortion. DJ is measured while
applying 100mVp-p noise (f ≤2MHz) to the power supply.
Figure 1. LVDS Output Levels
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint SwitchSUPPLY CURRENT vs. TEMPERATURE
MAX3640 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
MAX3640 toc02
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (mVp-p)
100mV/div
622Mbps EYE DIAGRAMMAX3640 toc03
200ps/div
100mV/div
1.25Gbps EYE DIAGRAMMAX3640 toc04
100ps/div
Typical Operating Characteristics(VCC= +3.3V, TA = +25°C, unless otherwise noted.)
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint Switch
Detailed DescriptionFigure 2 shows the MAX3640’s architecture. It consists
of two data paths; each data path begins with four dif-
ferential input buffers. The IN_SEL pin selects whether
the A or B channels are passed to the 2x2 crosspoint
switch that follows. The SEL_ pins control the routing of
the crosspoint switch. Each crosspoint switch output
drives a pair of LVDS output drivers. This provides a
redundant set of outputs that can be used for fan-out
or test purposes. Each set of outputs, DOA_ and
DOB_, is enabled or disabled by the ENA and ENB
pins. See Table 1 for routing controls.
LVDS Inputs and OutputsThe MAX3640 features LVDS inputs and outputs for
interfacing with high-speed digital circuitry. The LVDS
standard is based on the IEEE 1596.3 LVDS specifica-
tion. This technology uses 500mV to 800mV differential
low-voltage swings to achieve fast transition times, low
power dissipation, and improved noise immunity.
For proper operation, the data outputs require 100Ωdif-
ferential termination between the inverting and nonin-
verting pins. Do not terminate these outputs to ground.
See Figure 1 for LVDS output voltage specifications.
The data inputs are internally terminated with 100Ωdif-
ferential and therefore do not require external termina-
tion.
MAX3640
3.3V, 622Mbps LVDS,
Dual 4:2 Crosspoint SwitchFigure 2. Functional Diagram
