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ASM810REUR-T Datasheet(PDF) 2 Page - Alliance Semiconductor Corporation |
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ASM810REUR-T Datasheet(HTML) 2 Page - Alliance Semiconductor Corporation |
2 / 10 page 2 of 10 Notice: The information in this document is subject to change without notice 3 Pin Microcontroller Power Supply Supervisor ASM809, ASM810 October 2003 rev 1.0 Pin Diagram Block Diagram Pin Description Pin # Pin Name Function ASM809 ASM810 1 - GND Ground. 2 - RESET RESET is asserted LOW if VCC falls below VTH and remains LOW for TRST after VCC exceeds the threshold. - 2 RESET RESET is asserted HIGH if VCC falls below VTH and remains HIGH for TRST after VCC exceeds the threshold. 3- VCC Power supply input voltage (3.0V, 3.3V, 5.0V). Detailed Description A proper reset input enables a microprocessor / microcontroller to start in a known state. ASM809/810 assert reset to prevent code execution errors during power-up, power-down and brown-out conditions. Reset Timing The reset signal is asserted- LOW for the ASM809 and HIGH for the ASM810- when the VCC supply voltage falls below the threshold trip voltage and remains asserted for 140ms minimum after the VCC has risen above the threshold. 1 2 3 SOT23 ASM809 (ASM810) GND RESET VCC (RESET) ASM809 ASM810 RESET RESET 0V 5V 0V 5V 0V 5V VCC VTH TRST Figure 1: Reset TIming Diagram + - RESET Generator - + VCC RESET (RESET) GND ASM809 (ASM810) 4.38V 4.00V 3.08V 2.93V 2.63V 4.63V |
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