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MAX809SEUR-T
M MCP809/810 Microcontroller Supervisory Circuit with Push-Pull Output FEATURES PACKAGES • Holds microcontroller in reset until supply voltage reaches stable operating level • Resets microcontroller during power loss • Precision monitoring of 3V, 3.3V, and 5V systems • 7 voltage trip points available • Active low RESET pin (MCP809) or active high RESET (MCP810) • Push-pull output • Holds RESET/RESET for 350 ms (typical) • Guaranteed RESET/RESET to VDD = 1.0V • Accuracy of ±125mV for 5V systems and ±75mV for 3V systems over temperature • 45 µA typical operating current • Temperature range: - Industrial (I): -40°C to +85°C SOT-23-3 MCP809 RST VSS RST VDD MCP810 VSS VDD DESCRIPTION The Microchip Technology Inc. MCP809/810 is a voltage supervisory device designed to keep a microcontroller in reset until the system voltage has reached the proper level and stabilized. It also operates as protection from brown-out conditions when the supply voltage drops below a safe operating level. Both devices are available with a choice of seven different trip voltages and both have push-pull outputs. The MCP809 has a low active RESET pin and the MCP810 has a high active RESET pin. The MCP809/810 will assert the RESET/RESET signal whenever the voltage on the VDD pin is below the trip-point voltage. © 1999 Microchip Technology Inc. BLOCK DIAGRAM Preliminary VDD Comparator + - Delay Circuit Output Driver RESET or RESET Bandgap Reference DS11194A-page 1
MAXIM
Maxim Integrated
U.S.A
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