The MAX8934G dual-input Li+/Li-Poly linear battery charger with Smart Power Selector™ safely charges a single Li+/Li-Poly cell in accordance with JEITA* recommendations. The MAX8934G monitors the battery temperature (TBATT) while charging, and automatically adjusts the fast-charge current and charge termination voltage as the battery temperature varies. The MAX8934G also monitors the battery temperature while the battery is discharging,and provides a warning flag (active-low OT) to the system in the event that the battery is over temperature. Safety region 2 is supported (see Figure 6 for details). An ultra-low IQ, always-on LDO provides an additional 3.3V supply for system power.The MAX8934G operates with either separate inputs for USB and AC adapter power, or from a single input that accepts both. All power switches for charging and switching the load between battery and external power are included on-chip. No external MOSFETs are required.The MAX8934G features a Smart Power Selector to make the best use of limited USB or adapter power. Input current limit and battery charge current limit are independently set. Input power not used by the system charges the battery. Charge current limit and DC current limit can be set up to 1.5A and 2A, respectively, while USB input current can be set to 100mA or 500mA. Automatic input selection switches the system load from battery to external power.The MAX8934G provides a SYS output voltage of 4.35V.Other features include overvoltage protection (OVP), open-drain charge status and fault outputs, power-OK monitors, charge timers, and a battery thermistor monitor. Additionally, on-chip thermal limiting reduces the battery charge-rate to prevent charger overheating. The MAX8934G is available in a 28-pin, 4mm x 4mm, TQFN package.ApplicationsDigital Still Cameras and Digital Video CamerasHandheld Game SystemsPDAs, Palmtop, and Wireless HandheldsPortable Media, MP3 Players, and PNDs

The MAX31180 is a low-jitter, crystal-based clock generator with an integrated phase-locked loop (PLL) to generate spread-spectrum clock outputs from 16MHz to 134MHz. The device is pin-programmable to select the clock multiplier rate as well as the dither magnitude. The MAX31180 has a spread-spectrum disable mode and a power-down mode to conserve power.ApplicationsAutomotiveCable ModemsCell PhonesComputer PeripheralsCopiersInfotainmentPCsPrinters

The MAX4936A/MAX4937A are octal, high-voltage,transmit/receive (T/R) switches. The T/R switches arebased on a diode bridge topology, and the amount ofcurrent in the diode bridges can be programmed bythree digital inputs (S0, S1, and S2). Two control inputs(EN1 and EN2) allow enabling/disabling channels 1–4and channels 5–8, respectively. The MAX4936A includesthe T/R switch and grass-clipping diodes, performingboth transmit and receive operations. The MAX4937Aincludes just the T/R switch and performs the receiveoperation only.These devices feature low on-impedance in the entireultrasound frequency range with extremely low powerdissipation of 15mW (typ) per channel.The receive path for both devices is low impedanceduring low-voltage receive and high impedance duringhigh-voltage transmit, providing protection to the receivecircuitry. The low-voltage receive path is high bandwidth,low noise, low distortion, and low jitter.The MAX4936A SWC_ pins can be driven with high-voltagesignals using the anti-parallel diodes as grassclippers while connecting the SWB_ pins to the low-noiseamplifier (LNA). Connecting SWC_ to GND allowsthe internal anti-parallel diodes to be used as clamps.Grass-clipping diodes can then be connected to SWB_and the LNA to SWA_.Both devices are available in a small, 42-pin, 3.5mm x9mm TQFN package, and are specified over the commercial0°C to +70°C temperature range.ApplicationsHigh-Voltage Transmit and Low-Voltage IsolationMedical/Industrial ImagingUltrasound

The MAX4936A/MAX4937A are octal, high-voltage,transmit/receive (T/R) switches. The T/R switches arebased on a diode bridge topology, and the amount ofcurrent in the diode bridges can be programmed bythree digital inputs (S0, S1, and S2). Two control inputs(EN1 and EN2) allow enabling/disabling channels 1–4and channels 5–8, respectively. The MAX4936A includesthe T/R switch and grass-clipping diodes, performingboth transmit and receive operations. The MAX4937Aincludes just the T/R switch and performs the receiveoperation only.These devices feature low on-impedance in the entireultrasound frequency range with extremely low powerdissipation of 15mW (typ) per channel.The receive path for both devices is low impedanceduring low-voltage receive and high impedance duringhigh-voltage transmit, providing protection to the receivecircuitry. The low-voltage receive path is high bandwidth,low noise, low distortion, and low jitter.The MAX4936A SWC_ pins can be driven with high-voltagesignals using the anti-parallel diodes as grassclippers while connecting the SWB_ pins to the low-noiseamplifier (LNA). Connecting SWC_ to GND allowsthe internal anti-parallel diodes to be used as clamps.Grass-clipping diodes can then be connected to SWB_and the LNA to SWA_.Both devices are available in a small, 42-pin, 3.5mm x9mm TQFN package, and are specified over the commercial0°C to +70°C temperature range.ApplicationsHigh-Voltage Transmit and Low-Voltage IsolationMedical/Industrial ImagingUltrasound

The MAX5984 is a single-port, power-sourcing equipment (PSE) power controller designed for use in IEEE® 802.3af/at-compliant PSE. This device provides powered device (PD) discovery, classification, current limit, and DC and AC load-disconnect detections. The MAX5984 operates automatically without the need for any software programming and features an integrated power MOSFET and sense resistor. The device also supports new Class 5 and 2-Event classification for detection and classification of high-power PDs. The MAX5984 provides up to 40W to a single port (Class 5 enabled) and still provides high-capacitance detection for legacy PDs.The MAX5984 provides input undervoltage lockout (UVLO), input overvoltage lockout, overtemperaturedetection, output voltage slew-rate limit during startup, and LED status indication.The MAX5984 is available in a space-saving, 28-pin TQFN (5mm x 5mm) power package, and is rated for the extended (-40°C to +85°C) temperature range.ApplicationsIndustrial Automation EquipmentPoE RepeatersSingle-Port PSE End-Point ApplicationsSingle-Port PSE Power Injectors (Midspan Applications)Switches/RoutersWireless LAN Access Point/WiMAX® Base Stations

The MAX4987AE are overvoltage protection devices with built-in ESD protection for USB data lines. These devices feature a low 100mΩ (typ) RON internal nFET switch and protect low-voltage systems against voltage faults up to +28V. When the input voltage exceeds the overvoltage threshold or decreases below the under-voltage threshold, the internal nFET switch is turned off to prevent damage to the protected components.All switches feature a minimum 1.5A current-limit protection. During a short-circuit occurrence, the switch operates in an autoretry mode where the internal nFET switch is turned on to check if the fault has been removed. The autoretry interval is 30ms, and if the fault is removed, the nFET switch remains on.The MAX4987AE feature low-capacitance (3pF) ESD protection for USB data lines that allow transmission of high-speed USB 2.0 signals.The overvoltage threshold (OVLO) is preset to 6.15V. The undervoltage thresholds (UVLO) are preset to 2.55V (MAX4987AE). When the input voltage drops below the undervoltage (UVLO) threshold, the devices enter a low-current standby mode.All devices are offered in a small 2mm x 3mm, 8-pin TDFN package and operate over the -40°C to +85°C extended temperature range.ApplicationsCell PhonesMedia Players

The MAX7306/MAX7307 I²C-/SMBus™-compatible, serial-interfaced peripherals feature four level-translating I/Os and operate from a 1.62V to 3.6V power supply. The MAX7307 features a port supply (VLA) that allows level translation on I/O ports to operate from a separate power supply from 1.4V to 5.5V. The MAX7306 features an address select input (AD0) to allow up to four unique slave addresses.The MAX7306/MAX7307 ports P2, P3, and P4 can be configured as inputs, push-pull outputs, and open-drain outputs. Port P1 can be configured as a general-purpose input, open-drain output, or an open-drain active-low INT output. Ports P2 and P3 can be configured as OSCIN and OSCOUT, respectively. The MAX7306/MAX7307 include an internal oscillator for PWM, blink, and key debounce, or to cascade multiple MAX7306/MAX7307s. The external clock can be used to set a specific PWM and blink timing. The active-low RST input asynchronously clears the 2-wire interface and terminates a bus lockup involving the MAX7306/MAX7307.All ports configured as output feature 33-step PWM, allowing any output to be set from fully off, 1/32 to 31/32 duty cycle, to fully on. All output ports also feature LED blink control, allowing blink periods of 1/8 second, 1/4 second, 1/2 second, 1, 2, 4, or 8 seconds. Any port can blink during this period with a 1/16 to 15/16 duty cycle.The MAX7306/MAX7307 are specified over the -40°C to +125°C temperature range and are available in 10-pin µDFN (2mm x 2mm) and 10-pin µMAX® packages.ApplicationsCell PhonesLCD/Keypad BacklightsLED Status IndicatorsSystem I/O Ports

The MAX9406 high-speed, low-skew, quad differential input to current-mode logic (CML) translator features high-speed signal conversion of the DisplayPort™ (DP) to High-Definition Multimedia Interface (HDMI™) technology. This device features ultra-low propagation delay of 350ps and channel-to-channel skew of less than 20ps. The MAX9406 supports typical data rates of 2Gbps.The MAX9406 provides the level shift for HDMI's Display Data Channel (DDC) and hot-plug detection (HPD), which converts the 5V single-ended logic to 3.3V single-ended logic.The MAX9406 operates from a 3V to 3.6V core supply and is specified over the -40°C to +85°C extended temperature range. This device is available in 48-pin, 7mmx 7mm thin QFN and 32-pin, 5mm x 5mm thin QFN packages.ApplicationsATEBackplane Data and Clock DistributionBase StationsData and Clock Driver and BufferLevel Conversion for DP to HDMI

The DS1859 dual, temperature-controlled, nonvolatile(NV) variable resistors with three monitors consists oftwo 50kΩ or two 20kΩ, 256-position, linear, variableresistors; three analog monitor inputs (MON1, MON2,MON3); and a direct-to-digital temperature sensor. Thedevice provides an ideal method for setting and temperature-compensating bias voltages and currents incontrol applications using minimal circuitry. The variableresistor settings are stored in EEPROM memoryand can be accessed over the 2-wire serial bus.ApplicationsDiagnostic MonitoringInstrumentation and Industrial ControlsOptical TransceiversOptical TranspondersRF Power Amps

The DS1859 dual, temperature-controlled, nonvolatile(NV) variable resistors with three monitors consists oftwo 50kΩ or two 20kΩ, 256-position, linear, variableresistors; three analog monitor inputs (MON1, MON2,MON3); and a direct-to-digital temperature sensor. Thedevice provides an ideal method for setting and temperature-compensating bias voltages and currents incontrol applications using minimal circuitry. The variableresistor settings are stored in EEPROM memoryand can be accessed over the 2-wire serial bus.ApplicationsDiagnostic MonitoringInstrumentation and Industrial ControlsOptical TransceiversOptical TranspondersRF Power Amps