Lexington, Mass.—STMicroelectronics STM1061 line of precision voltage detectors include 40 drop-in replacements for industry-standard parts, particularly Torex Semiconductor's XC61C devices. The SOT23-packaged series, designed as a complement to the company's STM181xx and STM809-812 reset ICs, feature laser-trimmed voltage thresholds.
Ten of the 40 voltage threshold options are standard stocking items, and available in production quantities: 3.4, 3.1, 2.9, 2.8, 2.7, 2.6, 2.3, 2.2, 1.7 and 1.6 volts (nominal). The full range offers thresholds in 0.1-volt increments from 1.6 to 5.5 volts. Non-stock voltage options can be delivered to order, with thresholds laser-trimmed to minimize lead times. Typically the devices can be applied as a simpler low-cost solution in a broad range of voltage monitoring tasks, including A/D conversion and microprocessor supervision. A single detector chip, for example, can be used in place of an A/D converter to determine whether a signal is above or below a given fixed level; two such detectors can be used together for windowing.
Several of these open-frame devices can be wire-ORed together to form part of a multi-voltage microprocessor supervisor. The voltage detectors include hysteresis to guard against oscillation. The STM1061 can also be applied as an MCU reset IC for non-critical applications using an external capacitor on the chip's open drain output to set timing delay. The STM1061 family features low-power consumption; typically it's 900 nA.
Click here for additional product information. The STM1061, rated for operation over the industrial temperature range (–40 to +85°C), is priced starting at 8 cents each in high volumes. The chips are supplied in lead-free, RoHS compliant, SOT23-3L packages on reels of 2500 pieces.
STMicroelectronics, 1-781-861-2650, www.st.com