MCP120-450DI Datasheet, PDF (1/16 Pages) Microchip Technology – Microcontroller Supervisory Circuit with Open Drain Output

MCP120/130
Microcontroller Supervisory Circuit with Open Drain Output
FEATURES
• Holds microcontroller in reset until supply voltage
reaches stable operating level
• Resets microcontroller during power loss
• Precision monitoring of 3V, 3.3V and 5V systems
• 7 voltage trip points available
• Active low RESET pin
• Open drain output
• Internal pull-up resistor (5 kΩ) for MCP130
• Holds RESET for 350 ms (typical)
• RESET to VCC = 1.0V
• Accuracy of ±125 mV for 5V systems and ±75 mV
for 3V systems over temperature
• 45 µA typical operating current
• Temperature range:
- Industrial (I): -40°C to +85°C
DESCRIPTION
The Microchip Technology Inc. MCP120/130 is a volt-
age supervisory device designed to keep a microcon-
troller in reset until the system voltage has reached the
proper level and stabilized. It also operates as protec-
tion from brown-out conditions when the supply voltage
drops below a safe operating level. Both devices are
available with a choice of seven different trip voltages
and both have open drain outputs. The MCP130 has an
internal 5 kΩ pullup resistor. Both devices have active
low RESET pins. The MCP120/130 will assert the
RESET signal whenever the voltage on the VDD pin is
below the trip-point voltage.
PACKAGES
TO-92 with
‘D’ Bondout
TO-92 WITH
‘F’ BONDOUT
RST _VSS
VDD
MCP120
MCP130
VSS
VDD
RST
MCP130
TO-92 with
‘G’ Bondout
TO-92 with
‘H’ Bondout
VDD
RST
VSS
MCP120
VDD
VSS
RST
MCP120
MCP130
SOT-23-3
150mil SOIC
RST
VDD
RST 1
VSS
VDD 2
NC ³
VSS 4
8 _NC
7 _NC
6 _NC
5 _NC
MCP120
MCP130
MCP120
MCP130
BLOCK DIAGRAM
VDD
Comparator
+
-
Delay
Circuit
Output
Driver
5kΩ internal
pull-up on
MCP130
only
RESET
Bandgap
Reference
 2001 Microchip Technology Inc.
DS11184D-page 1