MIC2778 Datasheet, PDF (2/8 Pages) Micrel Semiconductor – Voltage Monitor with Adjustable Hysteresis Preliminary Information

MIC2778
Pin Configuration
LTH GND HTH
3
2
1
4
RST
5
VDD
SOT-23-5 (M5)
Micrel
Pin Description
Pin Number
1
2
3
4
5
Pin Name
HTH
GND
LTH
RST
VDD
Pin Function
High-Voltage Theshold (Input): Analog input to a comparator. When the
level on this pin initially rises above V_REF, the delay generator cycles and the
RST remains low for a minimum of 140ms.
Ground
Low-Voltage Threshold (Input): Analog input to a comparator. This is the
voltage monitor input assigned to detect a low voltage condition. When the
level on this pin falls below V_REF, RST is asserted and the condition is
latched until V_HTH > V_REF.
Reset (Output): Active-low, open-drain output. This output is asserted and
latched when V_LTH <V_REF, indicating a low voltage condition. This state
remains latched until V_HTH > V_REF.
Power Supply (Input): Independent supply input for internal circuitry.
MIC2778
2
October 1999