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Description : Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits

The MAX6715–MAX6729 are Ultra-Low-Voltage microprocessor (µP) Supervisory Circuits designed to monitor two or three system power-supply voltages. These devices assert a system reset if any monitored supply falls below its factory trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds.



The integrated Dual/Triple Supervisory Circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components.




AmsAG
austriamicrosystems AG
Description : Triple-Voltage, Micro-Power Microprocessor Supervisory Circuits

General Description

The AS1920 and AS1922 microprocessor Supervisory Circuits were designed to generate a reset when at least

one of the three monitored supply voltages falls below its respective trip threshold.



Key Features

! Simultaneous Triple-Voltage Monitoring

! Very-Low Supply Current: 6.2µA

! ±1.5% Accuracy Over Temperature

! Reset Time Delay: 200ms

! Power Supply Transient Immunity

! Guaranteed Reset for VCC3 ≥1V or VCC18 ≥ 1V

! Active-Low Push/Pull Reset Output (AS1920)

! Active-Low Open-Drain Reset Output (AS1922)

! 5-pin SOT23 Package



Applications

The devices are ideal for personal computers, note books, battery-powered systems, embedded controllers,

intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply monitoring application.



 


Description : Low-Voltage, High-Accuracy, Triple/Quad Voltage µP Supervisory Circuits in SOT Package

General Description

The MAX6700/MAX6710 precision triple/quad voltage microprocessor (µP) Supervisory Circuits monitor up to four system-supply voltages and assert a single reset if any supply voltage drops below its preset threshold. These devices significantly reduce system size and com ponent count while improving reliability compared to separate ICs or discrete components.



Features

♦Monitor Up to Four Power-Supply Voltages

♦Precision Factory-Set Reset Threshold Options for 5.0V, 3.3V, 3.0V, 2.5V, and 1.8V Supplies

♦Adjustable Voltage Threshold Monitors Down to 0.62V with 1.5% Accuracy

♦Low 35µA Supply Current


Description : Dual-Voltage µP Supervisory Circuits with Sequenced Reset Outputs

General Description

The MAX6391/MAX6392 microprocessor (µP) Supervisory Circuits provide sequenced logic reset outputs for multi component or dual-voltage systems. Each device can monitor two supply voltages and time-sequence two reset outputs to control the order in which system components are turned on and off. The MAX6391/MAX6392 increase system reliability and reduce circuit complexity and cost compared to separate ICs or discrete components.



Features

♦ Preset VCC Reset Threshold Voltages from 1.58V to 4.63V (master supply)

♦ Customer-Adjustable RESET IN2 to Monitor Voltages Down to 625mV (secondary supply)

♦ Fixed (140ms min) RESET1 Timeout

♦ Fixed (140ms min) or Customer-Adjustable RESET2 Timeout Period

♦ Guaranteed Reset Valid to VCC = 1V

♦ Active-Low Open-Drain Outputs or Push Pull/Open-Drain Combination

♦ Internal Open-Drain Pullup Resistors (for external VOH voltage connections)

♦ Manual Reset Input (MAX6392 only)

♦ Immune to Short Negative VCC Transients

♦ 15µA Typical Supply Current

♦ Few External Components

♦ Small 8-Pin SOT23 Package


Description : ±1%, Ultra-Low Output Voltage, Dual and Triple Linear n-FET Controllers

General Description
The MAX8563/MAX8564/MAX8564A ultra-low-output dual and triple LDO controllers allow flexible and inexpensive point-of-load voltage conversion in motherboards, desknotes, notebooks, and other applications.
These parts feature a 0.5V reference voltage with ±1% accuracy providing tight regulation of the output voltage. The MAX8563 has three n-channel MOSFET controller outputs, and the MAX8564/MAX8564A has two controller outputs.
Each controller output is adjustable from 0.5V to 3.3V when VDD = 12V and between 0.5V and 1.8V when VDD = 5V. Each output is independently enabled and asserts a POK signal when the output reaches 94% of the set value. Each output is protected against a soft short-circuit condition by an undervoltage comparator that disables the output when it drops to under 80% of the set voltage for more than 50µs. For a catastrophic short condition, the regulators are shut down immediately if the output drops below 60% of the set voltage.
The MAX8563 is available in a 16-pin QSOP package, and the MAX8564/MAX8564A are available in a 10-pin µMAX® package.

Features
♦ MAX8563: 3 Outputs
♦ MAX8564/MAX8564A: 2 Outputs
♦ ±1% Feedback Regulation
♦ Adjustable Output Voltage Down to 0.5V
♦ Can Use Ceramic Output Capacitors
♦ Wide Supply Voltage Range Permits Operation from 5V or 12V Rails
♦ Individual Enable Control and POK Signal Allows Sequencing
♦ Overload Protection Against Soft Short-Circuit Condition
♦ Undervoltage Short-Circuit Protection
♦ Drive n-Channel MOSFETs

Applications
   Motherboards
   Dual/Triple Power Supplies
   Desknotes and Notebooks
   Graphic Cards
   Ultra-Low-Dropout
   Voltage Regulators
   Low-Voltage DSP, µP, and Microcontroller Power Supplies

Description : Dual-Voltage Microprocessor Supervisory Circuits with Manual Reset and Watchdog

General Description
The AS1910 - AS1915 microprocessor Supervisory Circuits were designed to generate a reset when one of the two monitored supply voltages falls below a factorytrimmed threshold, and to maintain the reset for a minimum timeout period when both supplies are above their reset thresholds. Guaranteed to be in the correct state for VCC higher than +1.0V, these devices are ideal for multiple-voltage systems with strict monitoring requirements.

Key Features
■ Primary VCC Supervisory Range: +1.8 to +3.6V
■ Secondary VCC Supervisory Range: +0.9 to +2.5V (AS1913/AS1914/AS1915)
■ User-Adjustable Threshold Down to +0.63V (AS1910/AS1911/AS1912)
■ Guaranteed Reset Valid Down to VCC = +1.0V
■ Reset Timeout Delay: 215ms
■ Manual Reset Input
■ Three Reset Output Types
    - Active-High Push/Pull
    - Active-Low Push/Pull
    - Active-Low Open-Drain
■ Watchdog Timeout Period: 1.5s
■ Immune to Fast Negative VCC Transients
■ External Components Not Required
■ 6-pin SOT23 Package

Applications
    The devices are ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, critical CPU monitoring, and any multi-supply application.

Description : Dual-/Triple-/Quad-Voltage, Capacitor Adjustable, Sequencing/Supervisory Circuits

General Description
The MAX16025–MAX16030 are dual-/triple-/quad-voltage monitors and sequencers that are offered in a small TQFN package. These devices offer enormous design flexibility as they allow fixed and adjustable thresholds to be selected through logic inputs and provide sequence timing through small external capacitors. These versatile devices are ideal for use in a wide variety of multivoltage applications.

Features
♦ 2.2V to 28V Operating Voltage Range
♦ Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
♦ 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
♦ 2.7% Accurate Fixed Thresholds Over Temperature
♦ Fixed (140ms min)/Capacitor-Adjustable Delay Timing
♦ Independent Open-Drain/Push-Pull Outputs
♦ Enable Inputs for Each Monitored Voltage
♦ 9 Logic-Selectable Threshold Options
♦ Manual Reset and Tolerance Select (5%/10%) Inputs
♦ Small, 4mm x 4mm TQFN Package
♦ Fully Specified from -40°C to +125°C

Applications
    Multivoltage Systems
    DC-DC Supplies
    Servers/Workstations
    Storage Systems
    Networking/Telecommunication Equipment

Description : Dual-/Triple-/Quad-Voltage, Capacitor Adjustable, Sequencing/Supervisory Circuits

[MaximIC]

General Description
The MAX16025–MAX16030 are dual-/triple-/quad-voltage monitors and sequencers that are offered in a small TQFN package. These devices offer enormous design flexibility as they allow fixed and adjustable thresholds to be selected through logic inputs and provide sequence timing through small external capacitors. These versatile devices are ideal for use in a wide variety of multivoltage applications.

Features
♦ 2.2V to 28V Operating Voltage Range
♦ Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems
♦ 1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V
♦ 2.7% Accurate Fixed Thresholds Over Temperature
♦ Fixed (140ms min)/Capacitor-Adjustable Delay Timing
♦ Independent Open-Drain/Push-Pull Outputs
♦ Enable Inputs for Each Monitored Voltage
♦ 9 Logic-Selectable Threshold Options
♦ Manual Reset and Tolerance Select (5%/10%) Inputs
♦ Small, 4mm x 4mm TQFN Package
♦ Fully Specified from -40°C to +125°C

Applications
    Multivoltage Systems
    DC-DC Supplies
    Servers/Workstations
    Storage Systems
    Networking/Telecommunication Equipment

Description : Dual Ultra Low Power Op Amp in SOT23-8

General Description
The MIC863 is a dual low power operational amplifier in SOT23-8 package. It is designed to operate in the 2V to 5V range, rail-to-rail output, with input common-mode to ground. The MIC863 provides 450kHz gain-bandwidth product while consuming only a 4.2µA supply current.

Features
SOT23-8 packaging
• 450kHz gain-bandwidth product
• 800kHz, –3dB bandwidth
• 4.2µA supply current/channel
• Rail-to-rail output
• Ground sensing at input (common mode to GND)
• Drives large capactive loads (0.02µF)
• Unity gain stable

Applications
• Portable equipment
• Medical instrument
• PDAs
• Pagers
• Cordless phones
• Consumer electronics

Description : Single/Dual LVDS Line Drivers with Ultra-Low Pulse Skew in SOT23

General Description

The MAX9110/MAX9112 single/dual low-voltage differential signaling (LVDS) transmitters are designed for high-speed applications requiring minimum power consumption, space, and noise. Both devices support switching rates exceeding 500Mbps while operating from a single +3.3V supply, and feature ultra-low 250ps (max) pulse skew required for high-resolution imaging applications, such as laser printers and digital copiers.

The MAX9110 is a single LVDS transmitter, and the MAX9112 is a dual LVDS transmitter.



Features

♦ Low 250ps (max) Pulse Skew for High-Resolution Imaging and High-Speed Interconnect

♦ Space-Saving 8-Pin SOT23 and SO Packages

♦ Pin-Compatible Upgrades to DS90LV017/017A and DS90LV027/027A (SO Packages)

♦ Guaranteed 500Mbps Data Rate

♦ Low 22mW Power Dissipation at 3.3V (31mW for MAX9112)

♦ Conform to EIA/TIA-644 Standard

♦ Single +3.3V Supply

♦ Flow-Through Pinout Simplifies PC Board Layout

♦ Driver Outputs High Impedance when Powered Off



Applications

  Laser Printers

  Digital Copiers

  Cellular Phone Base Stations

  Telecom Switching Equipment

  Network Switches/Routers

  LCD Displays

  Backplane Interconnect

  Clock Distribution



 


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