TCM809SENB713

TCM809 and TCM810 are cost-effective system supervisory circuits designed to monitor the supply voltage VDD of digital systems and provide a reset signal to the host processor when necessary. No external components are required. Under normal conditions, the reset output asserts within 20µs (SOT-23) or 65µs (SC-70) after VDD falls below the reset threshold voltage. After VDD rises above the reset threshold, the reset output remains asserted for a minimum of 140ms. The TCM810 RESET output is active-high, while the TCM809 RESET output is active-low. The TCM809/TCM810 maintain valid output even when VDD drops as low as 1V. These devices are available in 3-pin SOT-23B and SC-70 packages. The TCM809/TCM810 are optimized to suppress fast transient glitches on the VDD supply rail. A low supply current of 9μA (typical at VDD = 3.3V) makes these devices well-suited for battery-powered applications.

Applications

• Computers
• Embedded systems
• Battery-powered devices
• Critical MCU supply voltage monitoring
• Automotive

Key features

• High-accuracy VDD monitoring circuit for systems with nominal supply voltages of 2.5V, 3.0V, 3.3V, and 5.0V
• 140ms minimum reset timeout period
• RESET output valid down to VDD = 1.0V (TCM809)
• Low supply current, 9μA (typical)
• Immune to short VDD transients
• Small 3-pin SC-70 and SOT-23B packages
• No external components required
• Push-pull reset output
• Temperature range:
• Commercial grade, SC-70(E): -40°C to +85°C
• Industrial grade, SOT-23, SC-70(V): -40°C to +125°C