MIC2779
Micrel
Ordering Information
Part Number
MIC2779H-2BM5
MIC2779H-1BM5
MIC2779L-2BM5
MIC2779L-1BM5
Marking
UPA2
UPA1
UPB2
UPB1
Output Polarity
Active-High RST
Active-High RST
Active-Low /RST
Active-Low /RST
Accuracy
2%
1%
2%
1%
Temperature Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
Package
SOT-23-5
SOT-23-5
SOT-23-5
SOT-23-5
Pin Configuration
LTH GND HTH
3
2
1
LTH GND HTH
3
2
1
4
5
4
5
RST
VDD
/RST
VDD
SOT-23-5 (M5)
“H” Version
SOT-23-5 (M5)
“L” Version
Pin Description
Pin Number
MIC2779H
1
Pin Number
MIC2779L
1
Pin Name
HTH
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 or RST remains high 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 or RST is asserted and the condition
is latched until V
HTH
> V
REF
.
Reset (Output): Push-pull 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
. The polarity of this signal (active-high or low) is deter
mined by the part number suffix. See ordering information.
Reset (Output): Push-pull 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
. The polarity of this signal (active-high or low) is deter
mined by the part number suffix. See ordering information.
Power Supply (Input): Independent supply input for internal circuitry.
2
3
2
3
GND
LTH
4
RST
4
/RST
5
5
VDD
MIC2779
2
June 2000
MICREL [ MICREL SEMICONDUCTOR ]
