MAX3840EGJ+ ,+3.3V / 2.7Gbps Dual 2 . 2 Crosspoint SwitchELECTRICAL CHARACTERISTICS(V = +3.0V to +3.6V, T = -40°C to +85°C. Typical values are at V = +3.3V, ..
MAX3840EGJ-T ,+3.3V, 2.7Gbps Dual 2 x 2 Crosspoint SwitchELECTRICAL CHARACTERISTICS(V = +3.0V to +3.6V, T = -40°C to +85°C. Typical values are at V = +3.3V, ..
MAX3840ETJ+ ,+3.3V, 2.7Gbps Dual 2 x 2 Crosspoint Switchapplications where serial data streamloop-through and protection channel switching are♦ 2ps Random ..
MAX3840ETJ+T ,+3.3V, 2.7Gbps Dual 2 x 2 Crosspoint SwitchApplicationsMAX3840EGJ -40°C to +85°C 32 QFN G3255-1SDH/SONET and DWDM Transport Systems+Denotes a ..
MAX3841ETG+ ,12.5Gbps, CML, 2 x 2 Crosspoint Switchapplications.♦ +3.3V Core SupplyThe MAX3841 has 150mV minimum differential inputP-Psensitivity, and ..
MAX3845UCQ+D ,DVI/HDMI 2:4 TMDS Fanout Switch and Cable DriverELECTRICAL CHARACTERISTICS(V = 3.0V to +3.6V, T = -10°C to +85°C. Typical values are at V = +3.3V, ..
MAX7403CPA ,8-th-order, lowpass, elliptic, switched-capacitor filter. Filter response elliptic (r=1.2), operating voltage +5Vapplications. They fea-' Single-Supply Operationture a shutdown mode that reduces the supply curren ..
MAX7403CSA ,8-th-order, lowpass, elliptic, switched-capacitor filter. Filter response elliptic (r=1.2), operating voltage +5VELECTRICAL CHARACTERISTICS—MAX7400/MAX7403(V = +5V, filter output measured at OUT, 10kΩ || 50pF loa ..
MAX7404ESA+ ,8th-Order, Lowpass, Elliptic, Switched-Capacitor FiltersApplications Ordering Information continued at end of data sheet.ADC Anti-Aliasing Speech Processin ..
MAX7405CSA ,8th-Order, Lowpass, Bessel, Switched-Capacitor FiltersFeaturesThe MAX7401/MAX7405 8th-order, lowpass, Bessel,' 8th-Order, Lowpass Bessel Filtersswitched- ..
MAX7405EPA ,8th-Order, Lowpass, Bessel, Switched-Capacitor FiltersApplicationsPART TEMP. RANGE PIN-PACKAGEADC Anti-Aliasing CT2 Base StationsMAX7401CSA 0°C to +70°C ..
MAX7405ESA ,8th-Order, Lowpass, Bessel, Switched-Capacitor FiltersELECTRICAL CHARACTERISTICS—MAX7401 (continued)(V = +5V, filter output measured at OUT, 10kΩ || 50pF ..
MAX3840EGJ-MAX3840EGJ+
+3.3V / 2.7Gbps Dual 2 . 2 Crosspoint Switch
General DescriptionThe MAX3840 is a dual 2 ✕2 asynchronous crosspoint
switch for SDH/SONET DWDM and other high-speed
data switching applications where serial data stream
loop-through and protection channel switching are
required. It is ideal for OC-48 systems with forward
error correction. A high-bandwidth, fully differential sig-
nal path minimizes jitter accumulation, crosstalk, and
signal skew. Each 2 ✕2 crosspoint switch can fan out
and/or multiplex up to 2.7Gbps data and 2.7GHz clock
signals. All inputs and outputs are current mode logic
(CML) compatible and easily adaptable to interface
with an AC-coupled LVPECL signal. When not used,
each CML output stage can be powered down with an
enable control to conserve power. The typical power
consumption is 460mW with all outputs enabled.
The MAX3840 is compatible with the MAX3876
2.5Gbps clock and data recovery (CDR) circuit.
The MAX3840 is available in a 32-pin exposed-pad
QFN package (5mm ✕5mm footprint) and operates
from a +3.3V supply over a temperature range of -40°C
to +85°C.
________________________ApplicationsSDH/SONET and DWDM Transport Systems
Add-Drop Multiplexers
ATM Switch Cores
WDM Cross-Connects
High-Speed Backplanes
FeaturesSingle +3.3V Supply460mW Power Consumption2psRMSRandom Jitter7psP-PDeterministic JitterPower-Down Feature for Deselected OutputsCML Inputs/Outputs6ps Channel-to-Channel Skew100ps Output Edge Speed 5mm ✕5mm 32 QFN Package
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switchypical Application Circuit19-1854; Rev 1; 11/01
Ordering Information
Pin Configuration appears at end of data sheet.
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switch
ABSOLUTE MAXIMUM RATINGS
DC 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 +5.0V
Input Voltage (CML) .........................(VCC - 1.0) to (VCC+ 0.5V)
TTL Control Input Voltage...........................-0.5V to (VCC+ 0.5V)
Output Currents (CML).......................................................22mA
Continuous Power Dissipation at TA= +85°C
32-Pin QFN (derate 29.4mW/°C)...................................1.9W
Operating Temperature Range...........................-40°C to +85°C
Operating Junction Temperature Range...........-55°C to +150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switch
AC ELECTRICAL CHARACTERISTICS
Note 1:AC characteristics are guaranteed by design and characterization.
Note 2:Measured with 100mVP-Pnoise (f ≤2MHz) on the power supply.
Note 3:Deterministic jitter (DJ) is the arithmetic sum of pattern-dependent jitter and pulse width distortion.
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switch
SUPPLY CURRENT vs. TEMPERATUREMAX3840 toc01
SUPPLY CURRENT (mA)
TEMPERATURE (°C)
CML DIFFERENTIAL VOLTAGEMAX3840 toc02
CML DIFFERENTIAL VOLTAGE (mV
P-P
TEMPERATURE (°C)
CHANNEL-TO-CHANNEL SKEW
vs. TEMPERATURE
MAX3840 toc04
TEMPERATURE (°C)
TMIE (ps)
2.7Gbps EYE DIAGRAMMAX3840 toc03
54ps/div
150mV/div
Typical Operating Characteristics(VCC= +3.3V, TA= +25°C, unless otherwise noted.)
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switch
Pin Description
MAX3840
+3.3V, 2.7Gbps Dual 2 ✕2 Crosspoint Switch
_______________Detailed DescriptionThe block diagram in Figure 1 shows the MAX3840
architecture. The SELA_ and SELB_ pins control the rout-
ing of the signals through the crosspoint switch. Each
output of the crosspoint switch drives a CML output dri-
ver. Each of the outputs, DOA_ and DOB_, is enabled or
disabled by the respective ENA_ and ENB_ pins.
CML Inputs and OutputsCML is used to simplify high-speed interfacing. On-
chip input and output terminations minimize the number
of external components required while improving signal
integrity. The CML output signal swing is small, result-
ing in lower power consumption. The internal 50Ωinput
and output terminations minimize reflections and elimi-
nate the need for external terminations.
Table 1. Output Routing
