Analog Devices Introduces Two Highly Accurate, Dual-Supply Supervisory ICs for Monitoring Microprocessors and FPGAs

Analog Devices, Inc. introduces the ADM6305 and ADM6306 dual-voltage supervisors that provide high-voltage threshold accuracy of 1.2 percent for monitoring low-voltage core rails. These new supervisory ICs are designed to monitor two supplies, provide a reset signal to digital processor-based systems and are ideal for dual supply processors and FPGAs. Available in a space saving 1.7 mm x 3.0 mm SOT package, the new ADM6305 and ADM6306 expand ADI's portfolio into the widest portfolio of high-accuracy multi-voltage supervisors/monitors available. Featuring two adjustable, resistor-programmable, under-voltage reset inputs of 0.4V and 1.23V, the ADM6305 and ADM6306 can monitor supplies of less than 1.2 V when the threshold is set at 0.4V. When a monitored power supply voltage falls below the minimum voltage threshold, a single, active low output triggers a system reset. Once all voltages rise above the selected threshold level, the reset signal remains low for the reset timeout period. Four reset timeout options of 1 ms (milliseconds), 20ms, 140ms and 1.12 seconds are also provided. The ADM6305 and ADM6306 are available in a 5-lead SOT-23 package and are specified over a temperature range of ?40°C to +85°C. "Each device's high threshold accuracy of ±1.2 percent allows very accurate monitoring of low voltage core rails," said Nigel Brooke, product marketing manager, Power Management Technology Group, Analog Devices. "When this is compared to the ±2.4 percent accuracy specified for the nearest alternative supervisors, the ADM6305 and ADM6306 are the most accurate microprocessor supervisors available." Key Features and Benefits

• Two adjustable input threshold voltage options provide design flexibility:
• 0.4V (±1.2% accurate)
• 1.23V (±2.4% accurate)
• Four factory-programmed reset timeout delays: 1ms, 20ms, 140ms and 1.12 seconds provide additional design flexibility
• Low power consumption of 8?A (typical) benefits portable device designs
• Small 1.7mm x 3.0mm 5-lead SOT-23 package reduces board space
• Optional pre-trimmed Vcc threshold increments between 2.5 V and 5 V provide additional design flexibility