Datasheet
Table Of Contents
- Device Features
- 1.0 Electrical Characteristics
- 2.0 Typical Performance Curves
- 3.0 PIN Description
- 4.0 Operational Description
- 5.0 Application Information
- 5.1 Supply Monitor Noise Sensitivity
- 5.2 Conventional Voltage Monitoring
- 5.3 Using in PIC® Microcontroller, ICSP™ Applications
- 5.4 Modifying The Trip Point, VTRIP
- 5.5 MOSFET Low-Drive Protection
- 5.6 Low-Power Applications
- 5.7 Controllers and Processors With Bidirectional I/O Pins
- 5.8 RESET Signal Integrity During Power-Down
- 6.0 Standard Device Offerings
- 7.0 Development Tools
- 8.0 Packaging Information
- Appendix A: Revision History
- Product Identification System
- Trademarks
- Worldwide Sales and Service
MCP131X/2X
DS21985D-page 24 2005-2012 Microchip Technology Inc.
3
MCP1316,
MCP1316M,
MCP1317,
MCP1320
MR I ST Manual Reset input for a Reset switch.
This input allows a push button switch to be directly con-
nected to the MCP131X/2X MR pin, which can then be
used to force a system Reset. This input filters (ignores)
noise pulses that occur on the MR pin.
L = Switch is depressed (shorted to ground). This forces
the RST/RST
pins Active.
H = Switch is open (internal pull-up resistor pulls signal
high). State of the RST/RST pins determined by
other system conditions.
MCP1318,
MCP1318M,
MCP1319,
MCP1319M,
MCP1321,
MCP1322
RST O Push-Pull Reset Output (active-high)
Goes active (High) if one of these conditions occurs:
1. If V
DD
falls below the selected Reset voltage
threshold.
2. If the MR
pin is forced low.
3. If the WDI pin does not detect an edge transition
within the minimum selected time-out period.
4. During power-up.
V
DD
Falling:
H = V
DD
< V
TRIP
L = V
DD
> V
TRIP
V
DD
Rising:
H = V
DD
< V
TRIP
+ V
HYS
L = V
DD
> V
TRIP
+ V
HYS
4 MCP1316,
MCP1316M,
MCP1317,
MCP1318,
MCP1318M,
MCP1320,
MCP1321
WDI I ST Watchdog Timer Input
The WDT period is specified at the time of device order.
The Standard WDT period is 1.6s typical.
An edge transition on the WDI pin resets the Watchdog
Timer counter (no time out). A Falling Edge is required to
start the WDT Timer.
MCP1319,
MCP1319M,
MCP1322
MR
I ST Manual Reset input for a Reset switch.
This input allows a push button switch to be directly con-
nected to the MCP131X/2X MR
pin, which can then be
used to force a system Reset. This input filters (ignores)
noise pulses that occur on the MR pin.
L = Switch is depressed (shorted to ground). This forces
the RST/RST
pins Active.
H = Switch is open (internal pull-up resistor pulls signal
high). State of the RST/RST
pins determined by
other system conditions.
5AllV
DD
— P The positive supply for the device.
TABLE 3-1: PIN FUNCTION TABLE (CONTINUED)
Pin No.
Device Symbol
Pin
Type
Buffer/
Driver
Type
Function
SOT23-5
Note 1: Open-Drain output with internal pull-up resistor.