X80140
Voltage Supervisor/Sequencer Quad Programmable Time Delay with Local/Remote Voltage Monitors
Typical Diagram
Key Features
- Quad Voltage Monitor and Sequencing
- Four independent voltage monitors
- Four time delay circuits (in circuit programmable)
- Remote delay via SMBus
- Factory programmable voltage thresholds
- Sequence up to 5 power supplies.
- Fault Detection Register
- Remote diagnostics of voltage fail event.
- Debounced Manual Reset Input
- Manufacturing/Configuration Memory
- 2Kbits of EEPROM
- 400kHz SMBus interface
- Available Packages
- 20-lead Quad No-Lead Frame (QFN - 5x5mm)
Description
The X80140 is a voltage supervisor/sequencer with four built in voltage monitors. This allows the designer to monitor up to four voltages and sequence up to five events. Low voltage detection circuitry protects the system from power supply failure or "brown out" conditions, resetting the system and resequencing the voltages when any of the monitored inputs fall below the minimum threshold level. The RESET pin is active until all monitored voltages reach proper operating levels and stabilize for a selectable period of time. Five common low voltage combinations are available, however, Intersil's unique circuits allow the any voltage monitor threshold to be reprogrammed for special needs or for applications requiring higher precision. A manual reset input provides debounce circuitry for minimum reset component count. Activating the manual reset both controls the RESET output and resequences the supplies through control of the ViGDO pins. The X80140 has 2kb of EEPROM for system configuration, manufacturing or maintenance information. This memory is protected to prevent inadvertent changes to the contents.
Applications
- General Purpose Timers
- Long Time Delay Generation
- Cycle Timers / Waveform Generation
- ON/OFF Delay Timers
- Supply Sequencing for Distributed Power
- Programmable Delay Event Sequencing
- Multiple DC-DC ON/OFF Sequencing
- Voltage Window Monitoring with Reset
- ON/OFF Switches with Programmable Delay
- Voltage Supervisor with Programmable Output Delays
- Databus Power Sequencing
- 100 ms to 5 secs Selectable Delay Switches
- ATE or Data Acquisition Timing Applications
- Datapath/Memory Timing Applications
- Data Pipeline Timing Applications
- Batch Timer/Sequencers
- Adjustable Duty Cycle Applications
