Low-Power, Adjustable Battery Monitors with
Hysteresis and Integrated µP Reset
VTRIPHIGH HTH
VMONITORED
VTRIPLOW LTH
LTHIN = 615mV
LBO
VHYST = HYSTERESIS
tLBOP
Figure 2. Single Low-Battery Output Timing
HTHIN = 615mV
tLBOD
VHYST
tLBOP
(VTRIPHIGH +5%) HTH+
VTRIPHIGH
HTH-
(VTRIPLOW +5%) LTH+
VTRIPLOW
LTH-
LBOL
VMONITORED
LTHIN = 615mV
LTHIN = 582mV
tLBOP
LBOH
VHYST = HYSTERESIS
tLBOP
Figure 3. Dual Low-Battery Output Timing
HTHIN = 615mV
HTHIN = 582mV
tLBOD
tLBOD
tLBOP
VHYST = 5%
VHYST = 5%
tLBOP
VCC
GND
MR
GND
RESET
GND
VTH
tRP
Figure 4. RESET Timing Diagram
SWITCH
BOUNCE
tMRP
tMPW
SWITCH
BOUNCE
SWITCH
BOUNCE
SWITCH
BOUNCE
tMRP
tDEB
tDEB
tMPW
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