STMicroelectronics Unveils 25 Microprocessor Reset ICs
STMicroelectronics Inc. (ST, Geneva, Switzerland) announced 25 new industry-standard reset supervisor ICs for production requirements, which are suitable for applications that require monitoring, including medical equipment, metering, servers, ADSL, point-of-sale, automotive, instrumentation and industrial hardware.
The ICs are manufactured using a production flow that will reduce lead times to as little as three weeks. There are five basic circuit configurations, each with five voltage options for a total of 25 different types. Reset threshold voltages available include 2.63 V, 2.93 V, 3.08 V, 4.40 V and 4.65 V (typical values). Features to choose from include a push-button reset input, a watchdog, and active high or active low-reset outputs.
The STM6821 has a reset input, a watchdog and an active high-reset output while the STM6823 is the same, but with an active low-reset output. The STM6824 also has an active low-reset output, but has a second, active high-reset output also, in place of the reset input. The STM6825 also adds the second, active high-reset output, but it replaces the watchdog function. The STM6321 is like the STM6824, but has an open-drain output on the active low-reset pin. Two more configurations will follow, each with five voltage options, bringing the total to 35 different types. A 2.5 V option is to be added to all seven configurations for a final total of 42 variants.
The chips are available in a lead-free, five-pin SOT-23 package and operate over the industrial temperature range of -40 °C to +85 °C. They are 100% pin-compatible. Samples of all the devices are available now. Pricing starts at $0.23 for high-volume quantities.
