The G692/G693 are microprocessor (µP) Supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and
adjustments when used with +5V, +3.3V, +3.0V- powered circuits. The G692/G693 also provide a de bounced Manual Reset Input.
Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages
The G692/G693 are microprocessor (µP) Supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V- powered circuits. The G692/G693 also provide a debounced Manual Reset Input.
These circuits perform a single function: they assert a Reset signal whenever the VCC supply Voltage declines below a pReset threshold, keeping it asserted for at least 140ms after VCC has risen above the Reset threshold. Reset thresholds suitable for operation with a variety of supply Voltages are available.
■ Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages
The MIC2785 is a micropower Voltage monitor that provides under-Voltage monitoring and Manual Reset
capability in a tiny 1.2mm x 1.2mm MLF® package. The MIC2785 provides a monitored Voltage Input (VIN) separate from the supply Input (VDD). This insures that the Reset (/RST) output maintains a valid output state when the Voltage being monitored ramps up or down. The device also includes a Manual Reset Input (/MR). The /RST output is an active low push-pull output.
• No external components
• Monitors Input Voltage for under-Voltage condition
• Separate Inputs for supply (VDD) and monitor (VIN)
• +1.5% VIN threshold Voltage accuracy
• Valid /RST state with VIN down to 0.0V
• Valid /RST state with VDD down to 1.20V
• Factory-programmed 1.62V reference
• Manual Reset Input (/MR)
• Active low Reset (/RST) output
• Ultra-low Input current – 5µA total (VIN and VDD)
• Rejects brief Input transients
• -25°C to 85°C operating temperature range
• RoHS lead-free compliant
• Available in tiny 6-pin 1.2mm x 1.2mm Thin MLF® package
The MAX811/MAX812 are low-power microprocessor(µP) Supervisory circuits used to monitor power supplies in µP and digital systems. They provide excellent
circuit reliability and low cost by eliminating external components and adjustments when used with 5V powered or 3V-powered circuits. The MAX811/MAX812
also provide a debounced Manual Reset Input.
These devices perform a single function: They assert a Reset signal whenever the VCCsupply Voltage falls below a pReset threshold, keeping it asserted for at
least 140ms after VCChas risen above the Reset threshold. The only difference between the two devices is that the MAX811 has an active-low Reset output (which isguaranteed to be in the correct state for Vcc down to 1V), while the MAX812 has an active-high Reset output. The Reset comparator is designed to ignore fast transients on VCC. Reset thresholds are available for operation with a variety of supply Voltages.
Low supply current makes the MAX811/MAX812 ideal for use in portable equipment. The devices come in a 4-pin SOT143package.
♦Precision Monitoring of 3V, 3.3V, and 5V Power-Supply Voltages
The MAX6412–MAX6420 low-power microprocessor Supervisor circuits monitor system Voltages from 1.6V to 5V. These devices are designed to assert a Reset signal whenever the VCCsupply Voltage or Reset IN falls below its Reset threshold or the Manual Reset Input is asserted.
The Reset output remains asserted for the Reset timeout period after VCC and Reset IN rise above the Reset threshold and the Manual Reset Input is deasserted. The Reset timeout is externally set by a capacitor to provide more flexibility.
µP Supervisor with Watchdog Timer, Power-Fail Comparator, Manual Reset and Adjustable Power-On Reset
Designed with high Reset threshold accuracy and low power consumption, the ISL88705, ISL88706, ISL88707, ISL88708, ISL88716 and ISL88813 devices are microprocessor Supervisors that are designed to monitor power-supply and battery functions in microprocessor systems. They can help to lower system cost, reduce board space requirements and increase the reliability of systems.
Features • Fixed-Voltage Options Allow Precise Monitoring of +3.0V, +3.3V, and +5.0V Power Supplies • Additional Voltage Monitor for Power-Fail Detection or Low-Battery Warning - Monitors Voltages Down to 1.25V - Adjustable Power-Fail Input Threshold • Watchdog Timer Capability with 1.6s Time-out • Both RST and RST Outputs Available • 140ms Minimum Reset Pulse Width with Option to Customize Using an External Capacitor • Manual Reset Input on all Devices • Reset Signal Valid Down to VDD = 1V • Accurate ±1.8% Voltage Threshold • Immune to Power-Supply Transients • Ultra Low 10µA Maximum Supply Current at 3V • Pb-Free (RoHS Compliant)
Applications • Portable/Battery Powered Equipment • Notebook/Desktop Computer Systems • Designs Using DSPs, Microcontrollers or Microprocessors • Controllers • Intelligent Instruments • Communications Systems • Industrial Equipment
The AS1925/AS1926 microprocessor Supervisory circuits were designed to assert a single Reset if the monitored supply Voltage drops below its Reset threshold or if the Manual Reset is activated. The Reset remains asserted for a fixed timeout delay after VCC has risen above the Reset threshold and the Manual Reset is deas serted.
Their small size, excellent circuit reliability, and low supply current (3.5µA) make the AS1925/AS1926 a very low cost solution by eliminating external components and adjustments when used with low-Voltage (+0.9 to +1.5V) systems.
Factory-Trimmed Reset Thresholds for Monitoring Supplies from 0.9 to 1.5V
Low Power Consumption: 3.5µA
Reset Threshold Accuracy Over Temperature: ±2.5%
Four Timeout Periods: 1.5ms, 30ms, 210ms, and 1.68s
Three Reset Output Types:
- Active-Low Push/Pull
- Active-High Push/Pull
- Active Low Open-Drain
Guaranteed Reset Valid to VCC = 0.55V (Active Low)
Manual Reset Input
Immune to Fast VCC Transients
5-pin SOT23 Package
The device is ideal for portable and battery-powered systems, embedded controllers, intelligent instruments, automotive systems, telecommunications equipment, networking equipment, computer workstations and serv
ers, critical CPU monitoring applications, and any low Voltage application.
General Description The MIC2775 is a power supply Supervisor that provides under-Voltage monitoring, Manual Reset capability, and poweron Reset generation in a compact 5-pin SOT package. Features include an under-Voltage detector, a delay generator, a Manual Reset Input, and both active-high and active-low Reset outputs. The under-Voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available.
Features • Monitors power supply for under-Voltage conditions • Choice of factory-programmed thresholds • Generates 140ms (minimum) power-on Reset pulse • Manual Reset capability • Both active-high and active-low Reset outputs • /RST output valid down to 1.2V • Ultra-low supply current, 3.5µA typical • Rejects brief Input transients • No external components • Pin compatible upgrade for MAX825 • IttyBitty™ 5-lead SOT-23 package
Applications • Monitoring processor core and Input/output Voltages • Computer systems • PDAs, hand-held PCs • Embedded controllers • Telecommunications systems • Power supplies
The MAX6711/MAX6712/MAX6713 are microprocessor (µP) Supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5.0V, +3.3V, +3.0V, or +2.5V-powered circuits. They also provide a debounced Manual Reset Input.
♦ Precision Monitoring of 2.5V, 3.0V, 3.3V, and 5.0V Power-Supply Voltages