MIC2775-46YM5 TR Micrel Inc, MIC2775-46YM5 TR Datasheet - Page 5

• Manufacturer Part Number: MIC2775-46YM5 TR
• Description: Low-V Supervisor, Dual Output, Manual Reset, SOT23-5 ( )
• Manufacturer: Micrel Inc
• Type: Simple Reset/Power-On Resetr

Specifications of MIC2775-46YM5 TR

• Number Of Voltages Monitored: 1
• Output: Complementary
• Reset: Active High/Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 4.68V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-2684-2; MIC2775-46YM5 TR; MIC2775-46YM5TR; MIC2775-46YM5TR

Functional Diagram
Functional Description
V
The V
input voltage. The voltage at this pin is continually compared
against the internal reference. The trip-point at which a reset
occurs is factory programmed. A reset is triggered if and
when V
to prevent chattering due to noise. The comparator on the
V
transients.
RST, /RST Reset Outputs
Typically, the MIC2775 is used to monitor the power supply
of intelligent circuits such as microcontrollers and micropro-
cessors. By connecting the appropriate reset output of a
MIC2775 to the reset input of a µC or µP, the processor will
be properly reset at power-on and during power-down and
brown-out conditions. In addition, asserting /MR, the manual
reset input, will activate the reset function.
June 2009
DD
DD
Input
input is relatively immune to very brief negative-going
DD
DD
pin is both the power supply terminal and a monitored
falls below the trip-point. Hysteresis is employed
/MR
V
DD
V
DD
I
PU
GND
V
REF
5
The reset outputs are asserted any time /MR is asserted or
if V
remain asserted for t
above the threshold boundary and/or /MR is released. A reset
pulse is also generated at power-on. Hysteresis is included
in the comparator to prevent chattering of the outputs due
to noise.
/MR, Manual Reset Input
The ability to initiate a reset via external logic or a manual
switch is provided in addition to the MIC2775’s automatic su-
pervisory functions. Driving the /MR input to a logic low causes
an immediate and unconditional reset to occur. Assuming
V
the reset outputs will be de-asserted no less than t
/MR may be driven by a logic signal or mechanical switch.
Typically, a momentary push-button switch is connected
such that /MR is shorted to ground when the switch contacts
close. The switch may be connected directly between /MR
and GND. /MR has an internal 100nA pull-up current to V
and may be left open if unused.
DD
Delay
Line
DD
is within tolerance when /MR is released (returns high),
drops below the threshold voltage. The reset outputs
One Shot
RST
R
S
MIC2775
(min) after V
/Q
Q
/RST
DD
RST
subsequently returns
MIC2775
RST
later.
DD