MIC2777
Micrel, Inc.
Standard Voltage Options*
Voltage
Code
46
44
31
29
28
26
25
23
22
17
Typical
Application (V
DD
)
5.0V ±5%
5.0V ±10%
3.3V ±5%
3.3V ±10%
3.0V ±5%
2.85V ±5%
2.70V ±5%
2.5V ±5%
2.4V ±5%
1.8V ±5%
Nominal Threshold
Voltage (V
TH
)
4.68
4.43
3.09
2.93
2.81
2.67
2.53
2.34
2.25
1.69
*There are ten standard versions available with an order increment of 3000 pieces. Samples of standard versions are
normally available from stock. Contact factory for information on non-standard versions. Available in tape-and-reel only.
Pin Configuration
RST GND /RST
3
2
1
4
5
IN
VDD
SOT-23-5 (M5)
Pin Description
Pin Number
1
Pin Name
/RST
Pin Function
Digital (Output): Asserted low whenever V
IN
or V
DD
falls below the reference
voltage. It will remain asserted for no less than 140ms after V
IN
and V
DD
return above the threshold limits.
Ground
Digital (Output): Asserted high whenever V
IN
or V
DD
falls below the refer-
ence voltage. It will remain asserted for no less than 140ms after V
IN
and
V
DD
return within above the threshold limit.
2
3
GND
RST
4
IN
Analog (Input): The voltage on this pin is compared to the internal 300mV
reference. An undervoltage condition will trigger a reset sequence. Manual
reset capability can be achieved by adding a switch between this pin and
ground.
Analog (Input): Power supply input for internal circuitry and input to the fixed
voltage monitor: The voltage on this pin is compared against the internal
voltage reference. An undervoltage condition will trigger a reset sequence.
5
VDD
MIC2777
2
November 2005
MICREL [ MICREL SEMICONDUCTOR ]
