POWER AND LINEAR IC SOLUTIONS

Tiny Five-Pin Supervisors Improve Reliability and Cut Costs

Intersil’s ISL88011-ISL88015 family of voltage monitoring supervisors combines all the functions required for critical monitoring in a single five-pin SOT23 package. Requiring a typical supply current of just 5.5µA, these devices allow designers to build reliability into their products without compromising features, performance or cost.

The new supervisors offer both fixed and/or adjustable voltage monitoring along with power-on reset control, customisable supply voltage supervision, watchdog timer capability and manual reset. As a result the ISL88011-ISL88015 family helps reduce system costs and board space for process control systems, intelligent instruments, embedded control systems, computers, and portable or battery-powered equipment. The devices are also suitable for critical processor and controller power monitoring.



The voltage monitors are accurate to ±1.5% from -45°C to +85°C and draw very little current at 4.5µA to 8µA. They also monitor down to 600mV for today’s lower power supply voltages and are designed using Intersil’s unique TwinPin design, which reduces pin-count by combining the active-low reset output and manual reset input into a single pin.

An innovative enhanced watchdog timer for microcontrollers and microprocessors provides a longer start-up timeout at power-on. This allows an operating system to boot, an FPGA to initialise, or system software to start without having to disable the watchdog timer to avoid erroneous resets.

Also, in order to provide designers with a full set of options based on their specific application requirements, the ISL88011, ISL88012 and ISL88013 feature fixed voltage trip points while the ISL88014 and ISL88015 provide user-adjustable voltage trip points.

A complete evaluation kit, the ISL8801XEVAL, is also available to assist developers.

Features

• Feature-rich voltage supervisors with adjustable power-on reset delay
• Tiny five-pin SOT package
• Dual voltage monitoring option (one fixed, one adjustable down to 0.6V)
• Watchdog timer capability
• Fixed (2.5V, 3.0V, 3.3V, or 5.0V) and/or adjustable voltage monitoring
• Manual reset assertion
• Ultra-low 4.5μA supply current
• ±1.5% voltage trip point accuracy

Applications

• Process control systems
• Intelligent instruments
• Embedded control systems
• Computer systems
• Critical microprocessor and microcontroller power monitoring
• Portable/battery-powered equipment
• PDA and hand-held PC devices

For further information, including the ISL8801x Datasheet, please click here.