The MAX3421E USB peripheral/host controller contains the digital logic and analog circuitry necessary to implement a full-speed USB peripheral or a full-/low-speed host compliant to USB specification rev 2.0. A built-in transceiver features ±15kV ESD protection and programmable USB connect and disconnect. An internal serial interface engine (SIE) handles low-level USB protocol details such as error checking and bus retries. The MAX3421E operates using a register set accessed by an SPI interface that operates up to 26MHz. Any SPI master (microprocessor, ASIC, DSP, etc.) can add USB peripheral or host functionality using the simple 3- or 4-wire SPI interface.The MAX3421E makes the vast collection of USB peripherals available to any microprocessor, ASIC, or DSP when it operates as a USB host. For point-to-point solutions, for example, a USB keyboard or mouse interfaced to an embedded system, the firmware that operates the MAX3421E can be simple since only a targeted device is supported.Internal level translators allow the SPI interface to run at a system voltage between 1.4V and 3.6V. USB-timed operations are done inside the MAX3421E with interrupts provided at completion so an SPI master does not need timers to meet USB timing requirements. The MAX3421E includes eight general-purpose inputs and outputs so any microprocessor that uses I/O pins to implement the SPI interface can reclaim the I/O pins and gain additional ones.The MAX3421E operates over the extended -40°C to +85°C temperature range and is available in a 32-pin TQFP package (5mm x 5mm) and a 32-pin TQFN package (5mm x 5mm). FAQs: MAX3421EApplicationsCamerasCustom USB DevicesDesktop RoutersEmbedded SystemsInstrumentationMedical DevicesMicroprocessors and DSPsMP3 PlayersPDAsPLCsSet-Top Boxes

The MAX4885 integrates high-bandwidth analog switches and level translating buffers to implement a complete 1:2 or 2:1 multiplexer for VGA signals. The device provides switching for RGB, display data channel (DDC), and horizontal and vertical synchronization (HSYNC, VSYNC) signals. A low-noise charge pump with internal capacitors provides a boosted gate-drive voltage to improve performance of the RGB switches. In the 1:2 multiplexer mode, HSYNC/VSYNC inputs feature level-shifting buffers to support low voltage CMOS or standard TTL-compatible graphics controllers. In the 2:1 multiplexer mode, the output buffers for the HSYNC/VSYNC inputs are disabled, allowing bidirectional signaling. In both modes, DDC signals are voltage-clamped to an external voltage to provide level translation and protection. The MAX4885 features a 5µA shutdown mode and is ESD protected to ±8kV human body model (HBM) on externally routed pins.The MAX4885 is specified over the extended (-40°C to +85°C) temperature range, and is available in the 32-pin, 5mm x 5mm TQFN package.ApplicationsNotebook ComputersServers

The MAX5128 nonvolatile, single, linear-taper, digitalpotentiometer performs the function of a mechanicalpotentiometer, but replaces the mechanics with a simple2-wire digital interface. The MAX5128 performs thesame function as a discrete potentiometer or variableresistor and features 128 taps and 22kΩ end-to-endresistance. The MAX5128 also features an ultra-small,2mm x 2mm µDFN package and low 0.5µA (typ) standbysupply current, making this device ideal for portableapplications. The MAX5128 operates from a +2.7V to+5.25V power supply. An integrated nonvolatile memoryrecalls the programmed wiper position of the digitalpotentiometer. A simple 2-wire up/down interface programsthe wiper position. The digital potentiometer providesa low 5ppm/°C ratiometric temperature coefficientand is specified over the extended -40°C to +85°C temperaturerange.ApplicationsBacklight AdjustmentBias Setting for RadiosFiber-Module Bias SettingLED Bias AdjustmentPortable Consumer ElectronicsPower-Supply ModulesVCOM Adjustment for LCD Panels

The MAX5440 dual, 40kΩ logarithmic taper volume control features a debounced up/down interface for use with a simple rotary encoder without using a microcontroller (µC). Each potentiometer has 32 log-spaced tap points with a buffered wiper output and replaces mechanical potentiometers. An integrated bias generator provides the required ((VDD + VSS) / 2) bias voltage, eliminating the need for costly external op-amp circuits in unipolar audio applications. A mode-indicator LED output specifies volume or balance control. Five integrated LED drivers indicate volume level or balance settings, depending on the status of the mode indicator.The MAX5440 includes debounced pushbutton inputs for mute and mode. The mute input allows a single pushbutton to change between volume control and the -90dB (typ) mute setting. The mode input toggles between volume and balance control. A click-and-pop suppression feature minimizes the audible noise generated by wiper transitions. The MAX5440 provides a nominal temperature coefficient of 35ppm/°C end-to-end and 5ppm/°C, ratiometrically. The MAX5440 is available in a 24-pin SSOP package and is specified for operation over the -40°C to +85°C extended temperature range.ApplicationsDesktop SpeakersMultimedia Docking StationsSet-Top BoxesStereo Volume Control

The MAX7347/MAX7348/MAX7349 I²C interfaced peripheralsprovide microprocessors with management of up to64 key switches. Key inputs are monitored statically, notdynamically scanned, to ensure low-EMI operation. TheMAX7347 can monitor up to 24 switches, the MAX7348can monitor up to 40 switches, and the MAX7349 canmonitor up to 64 switches. The switches can be metallicor resistive (carbon) up to 1kΩ.The key controller debounces and maintains a FIFO ofkey-press events (including autorepeat, if enabled). Aninterrupt (active-low INT) output can be configured to alert keypresses either as they occur, or at maximum rate.The MAX7348/MAX7349 feature a tone generator togenerate automatic key-click sounds or alarm tonesunder processor control.The sounder frequencies cover the 5th musical octave(523.25Hz to 987.77Hz), plus seven other musicalnotes up to 2637Hz. The output can also be programmedto be high or low for the sound duration tooperate an electronic sounder, relay, or lamp.The MAX7347 is offered in 16-pin QSOP and TQFNpackages. The MAX7348 is offered in a 20-pin QSOPpackage. The MAX7349 is available in 24-pin QSOP andTQFN packages. The MAX7347/MAX7348/MAX7349operate over the -40°C to +125°C temperature range.ApplicationsIndustrial ControlsInstrumentation PanelsMedical InstrumentsSecurity and Access

The MAX7347/MAX7348/MAX7349 I²C interfaced peripheralsprovide microprocessors with management of up to64 key switches. Key inputs are monitored statically, notdynamically scanned, to ensure low-EMI operation. TheMAX7347 can monitor up to 24 switches, the MAX7348can monitor up to 40 switches, and the MAX7349 canmonitor up to 64 switches. The switches can be metallicor resistive (carbon) up to 1kΩ.The key controller debounces and maintains a FIFO ofkey-press events (including autorepeat, if enabled). Aninterrupt (active-low INT) output can be configured to alert keypresses either as they occur, or at maximum rate.The MAX7348/MAX7349 feature a tone generator togenerate automatic key-click sounds or alarm tonesunder processor control.The sounder frequencies cover the 5th musical octave(523.25Hz to 987.77Hz), plus seven other musicalnotes up to 2637Hz. The output can also be programmedto be high or low for the sound duration tooperate an electronic sounder, relay, or lamp.The MAX7347 is offered in 16-pin QSOP and TQFNpackages. The MAX7348 is offered in a 20-pin QSOPpackage. The MAX7349 is available in 24-pin QSOP andTQFN packages. The MAX7347/MAX7348/MAX7349operate over the -40°C to +125°C temperature range.ApplicationsIndustrial ControlsInstrumentation PanelsMedical InstrumentsSecurity and Access

The MAX9996 high-linearity downconversion mixer provides8.3dB gain, +26.5dBm IIP3, and 9.7dB NF for1700MHz to 2200MHz UMTS/W-CDMA, DCS, and PCSbase-station receiver applications. With a 1900MHz to2400MHz LO frequency range, this particular mixer isideal for high-side LO injection receiver architectures.Low-side LO injection is supported by the MAX9994,which is pin-for-pin and functionally compatible with theMAX9996.In addition to offering excellent linearity and noise performance,the MAX9996 also yields a high level of componentintegration. This device includes a double-balancedpassive mixer core, an IF amplifier, a dual-inputLO selectable switch, and an LO buffer. On-chipbaluns are also integrated to allow for single-ended RFand LO inputs. The MAX9996 requires a nominal LOdrive of 0dBm, and supply current is guaranteed to bebelow 240mA.The MAX9994/MAX9996 are pin compatible with theMAX9984/MAX9986 815MHz to 995MHz mixers, makingthis entire family of downconverters ideal for applicationswhere a common PC board layout is used forboth frequency bands. The MAX9996 is also functionallycompatible with the MAX9993.The MAX9996 is available in a compact, 20-pin, TQFN package (5mm x 5mm) with an exposed paddle.Electrical performance is guaranteed over the extended-40°C to +85°C temperature range.ApplicationscdmaOne™ and cdma2000® Base StationsDCS1800/PCS1900 EDGE Base StationsDigital and Spread-Spectrum Communication SystemsFixed Broadband Wireless AccessMicrowave LinksMilitary SystemsPHS/PAS Base Stations Predistortion ReceiversPrivate Mobile Radios (PMRs)UMTS/WCDMA Base StationsWireless Local Loop (WLL)

The MAX3171/MAX3173 are three-driver/three-receiver multiprotocol transceivers that operate from a single +3.3V supply. The MAX3171/MAX3173, along with the MAX3170 and MAX3172/MAX3174, form a complete software-selectable data terminal equipment (DTE) or data communications equipment (DCE) interface port that supports V.28 (RS-232) and V.10/V.11 (RS-449, V.36, EIA-530, EIA-530-A, X.21, RS-423) protocols. The MAX3171/MAX3173 transceivers carry the serial interface control signaling; the MAX3170 transceivers carry the clock and data signals. The MAX3172/MAX3174 have an extra transceiver for applications requiring four transceivers for control signaling.An internal charge pump and proprietary low-dropout transmitter output stage allow V.28, V.11, and V.10 compliant operation from a single +3.3V supply. A no-cable mode is entered when all mode pins (M0, M1, and M2) are pulled high or left unconnected. In no-cable mode, supply current decreases to 2mA and all transmitter and receiver outputs are disabled (high impedance). Short-circuit limiting and thermal-shutdown circuits protect the drivers against excessive power dissipation.The MAX3171 features 10µs deglitching on the V.10/V.11/V.28 receiver inputs. The MAX3173 is available for applications that do not require deglitching on the serial handshake signals.These parts require only four surface-mount capacitors for charge-pump operation in addition to supply bypassing.ApplicationsCSUs/DSUsData NetworkingData RoutersPCI CardsTelecommunications

The MAX4548/MAX4549 serial-interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications. The devices include three crosspoint switch matrices, each containing three inputs and two outputs. To improve off-isolation, each switch matrix has a shunt input and each output is selectively programmable for clickless or regular-mode operation. A selectable set of internal resistive voltage dividers supplies DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage dividers include four externally accessible bypass points.The MAX4548/MAX4549 feature 35Ω max on-resistance, 7Ω on-resistance matching between channels, 5Ω on-resistance flatness, and 0.07% total harmonic distortion (THD). Additionally, they feature off-isolation of -85dB at 20kHz and -72dB at 10MHz, with crosstalk of -85dB at 20kHz and -55dB at 10MHz. The MAX4548 uses a 2-wire I²-compatible serial interface, while the MAX4549 uses a 3-wire SPI™/QSPI™/MICROWIRE™-compatible serial interface. These parts are available in 36-pin SSOP packages and are specified for the extended (-40°C to +85°C) operating range.ApplicationsHigh-End Audio SystemsPC Multimedia BoardsSecurity SystemsSet-Top BoxesVideo Conferencing Systems

The MAX5460–MAX5468 linear-taper digital potentiometersperform the same function as a mechanical potentiometeror a variable resistor. These devices consist of afixed resistor and a wiper contact with 32-tap points thatare digitally controlled through a 2-wire serial interface.The MAX5462/MAX5465/MAX5468 are configured aspotentiometers. The rest of the devices in this family areconfigured as variable resistors. See Pin Configurationsfor part functionality.Three resistance values are available: 10kΩ (MAX5466/MAX5467/MAX5468), 50kΩ (MAX5463/MAX5464/MAX5465), and 100kΩ (MAX5460/MAX5461/MAX5462).The MAX5460–MAX5465 (100kΩ and 50kΩ) are availablein space-saving 5-pin and 6-pin SC70 packages.The MAX5466/MAX5467/MAX5468 (10kΩ) are availablein 5-pin and 6-pin SOT23 packages.ApplicationsGain AdjustmentLCD Screen AdjustmentLine Impedance MatchingMechanical Potentiometer ReplacementVolume Control