MAXIM Manuals (Others)

MAX8553/MAX8554 is a 4.5V to 28V input, synchronous buck controller providing a complete power management solution for DDR memories.

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The MAX8553/MAX8554 are Maxim’s synchronous step-down controllers for DDR memory power management. The MAX8553 generates 1/2 VREFIN voltage for VTT and VTTR. The VTT and VTTR tracking voltages are maintained within 1% of 1/2 VREFIN. The MAX8554 is a 4.5V to 28V input voltage, nontracking step-down controller with a low 0.6V feedback threshold voltage. The MAX8553/MAX8554 use Maxim’s proprietary Quick-PWM™ architecture for fast transient response and operate with selectable pseudo-fixed frequencies. Both controllers can operate without an external bias supply. The controllers operate in synchronous-rectification mode to ensure balanced current sourcing and sinking capacity of up to 25A. The MAX8553/MAX8554 also provide up to 95% efficiency, making them ideal for server and point-of-load applications. Additionally, a low 5µA shutdown current allows for longer battery life in notebook applications. Lossless current monitoring is achieved by monitoring the low-side MOSFET’s drain-to-source voltage. The MAX8553/MAX8554 have an adjustable foldback current limit to withstand a continuous output overload and short circuit. Digital soft-start provides control of inrush current during power-up. Overvoltage protection shuts the converter down and discharges the output capacitor. The MAX8553/MAX8554 come in space-saving 16-pin QSOP packages.

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The MAX6690 is a precise digital thermometer from Maxim that reports the temperature of both a remote P-N junction and its own die.

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The MAX256 is an integrated primary-side controller and H-bridge driver for isolated power-supply circuits. The device contains an on-board oscillator, protection circuitry and internal FET drivers to provide up to 3W of power to the primary winding of a transformer. The MAX256 can be operated using the internal program- mable oscillator or can be driven by an external clock for improved EMI performance. Regardless of the clock source being used, an internal flip-flop stage guaran- tees a fixed 50% duty cycle to prevent DC current flow in the transformer. The MAX256 operates from a single-supply voltage of +5V or +3.3V, and includes undervoltage lockout for controlled startup. The device prevents cross-conduc- tion of the H-bridge MOSFETs by implementing break- before-make switching. Thermal shutdown circuitry provides additional protection against damage due to overtemperature conditions. The MAX256 is available in the 8-pin thermally-enhanced SO package. The device is specified for the automotive (-40°C to +125°C) temperature range.

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This document introduces the features and characteristics of the DS1822 digital thermometer, including the 1-Wire® interface, 64-bit serial code, multidrop capability, no external components, data line power supply, temperature range, accuracy, resolution, alarm settings, and application scenarios.

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The MAX6687/MAX6688 is a single-package combination of a remote-junction temperature switch and a local temperature switch for overtemperature protection applications.

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The MAX9921 is a Hall effect sensor power supply and interface chip produced by TI. The chip can provide current, monitor current, filter current and output logic level. In addition, the chip also has fault diagnosis and protection functions, which can detect open inputs, inputs shorted to the battery, and inputs shorted to ground.

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The MAX3349EA is a USB transceiver from Texas Instruments that provides a full-speed USB interface to a lower voltage microprocessor or ASIC. The device supports enumeration, suspend, and VBUS detection. MAX3349EA features a special UART multiplexing mode that routes external UART signals (Rx and Tx) to D+ and D-, allowing the use of a shared connector to reduce cost and part count for mobile devices. The UART interface allows mobile devices such as PDAs, cellular phones, and digital cameras to use either UART or USB signaling through the same connector. The MAX3349EA features a separate UART voltage supply input to support legacy devices using +2.75V signaling. The MAX3349EA supports a maximum UART baud rate of 921kbaud. Upon connection to a USB host, the MAX3349EA enters USB mode and provides a full-speed USB 2.0 compliant interface through VP, VM, RCV, and OE. The MAX3349EA features internal series termination resistors on D+ and D-, and an internal 1.5kΩ pullup resistor to D+ to allow the device to logically connect and disconnect from the USB while plugged in. A suspend mode is provided for low-power operation. D+ and D- are protected from electrostatic discharge (ESD) up to ±15kV. The MAX3349EA is available in 16-pin TQFN (4mm x 4mm) and 16-bump UCSP™ (2mm x 2mm) packages, and is specified over the -40°C to +85°C extended temperature range.

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Introduces the working principle, features and applications of MAX3346E bidirectional transceiver. MAX3346E is a USB transceiver that supports full-speed and low-speed USB communication, has an internal 1.5kΩ USB pull-up resistor, supports logic-selectable suspend mode, and operates at a voltage range of 1.65-5.5V.

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MAX3341E is a USB level translator that converts logic-level signals to USB signals and USB signals to logic-level signals.

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MAX333A is a precision, quad, single-pole double- throw (SPDT) analog switch that offers low on resistance, guaranteed to match within 2Ω between channels and to remain flat over the analog signal range (∆3Ω max).

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The MAX3325 integrates a two-transmitter, two-receiver RS-232 transceiver with an LCD supply plus tempera- ture-compensated contrast control

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The MAX3322E/MAX3323E 3.0V to 5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces are designed for multidrop applications with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection.

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The MAX3320 is a device that combines a microprocessor (µP) supervisory circuit with an RS-232 transceiver. It features precise monitoring of 5V and 3.3V power supply voltages, with a power-on reset pulse width of at least 100ms and power supply transient immunity. The device achieves a low supply current of 4µA with AutoShutdown Plus. The receivers are always active, and the power-on reset is always active. The device has a guaranteed data rate of 250kbps and comes in a space-saving 20-pin SSOP package.

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The MAX3316E-MAX3319E are 2.5V powered RS-232 compatible transceivers featuring shutdown (MAX3317E), AutoShutdown Plus (MAX3318E/MAX3319E), and enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using the IEC 1000-4-2 Air-Gap Discharge method, ±8kV using the IEC 1000-4-2 Contact Discharge method, and ±15kV using the Human Body Model. All devices are guaranteed at a data rate of 460kbps. The transceivers have a proprietary low-dropout transmitter output stage enabling RS-232 compatible operation from a +2.25V to +3.0V supply with a dual charge pump. The charge pump requires only four 0.1µF capacitors. The MAX3318E/MAX3319E feature a logic-level output (READY) that asserts when the charge pump is regulating and the device is ready to begin transmitting. The MAX3318E/MAX3319E achieve a 1µA supply current using Maxim's revolutionary AutoShutdown Plus feature. These devices automatically enter a low-power shutdown mode when the RS-232 cable is disconnected or the transmitters of the connected peripherals are inactive for more than 30 seconds. They turn on again when they sense a valid transition at any transmitter or receiver input. AutoShutdown Plus saves power without changes to the existing BIOS or operating system. The MAX3317E also features a 1µA shutdown mode that can be entered by driving SHDN low.

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The MAX3316–MAX3319 transceivers are 2-wire half RS-232 transceivers that integrate Maxim's proprietary low-dropout transmitter output stage, allowing for RS-232 compatible performance from +2.25V to +3.0V with a dual-charge pump.

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