ADM6328-28ARTZ-R7

The ADM6326/ADM6328/ADM6346/ADM6348 devices provide low cost solutions for protecting sensitive circuitry, such as microprocessor and telecommunications circuitry. With built-in glitch immunity, ultralow supply currents, and 24 reset threshold voltage options, the ADM6326/ADM6328/ ADM6346/ADM6348 not only ensure that systems are immune to fast transients on VCC₂ but also that the devices are suitable for monitoring a variety of supply voltages in low power, portable equipment. These devices provide a reset output during power-up, powerdown, and brownout conditions. On power-up, an internal timer holds RESET asserted for at least 100 ms. This holds the microprocessor in a reset state until conditions have stabilized. The reset output remains operational with VCC as low as 1 V. The ADM6326 and ADM6346 have an active low push-pull reset output. The ADM6328 and ADM6348 have an active low opendrain reset output, which requires an external pull-up resistor. The ADM6326 and ADM6328 offer a choice of ten reset thresholds in increments between 2.2 V and 3.08 V, whereas the ADM6346 and ADM6348 offer a choice of 14 reset thresholds between 3.3 V and 4.63 V. These devices are available in a 3-lead SOT-23 package and operate over the extended temperature range of -40°C to +85°C.

Applications

• Telecommunications
• Microprocessor systems
• Desktop and notebook computers
• Portable equipment

Key features

• Ultralow supply current of 1 µA maximum (ADM6326/ADM6328)
• Accurate monitoring of 2.5 V, 3 V, 3.3 V, and 5 V rails
• Reset thresholds available in increments from 2.2 V to 4.63 V
• Glitch immunity from negative-going VCC transients
• 2 reset output options Push-pull RESET (ADM6326/ADM6346) Open-drain RESET (ADM6328/ADM6348)
• Minimum reset timeout of 100 ms
• Operating temperature range of -40°C to +85°C
• 3-lead SOT-23 package