Datasheet

 2005-2012 Microchip Technology Inc. DS21985D-page 9
MCP131X/2X
FIGURE 1-1: Device Voltage and Reset Pin Waveforms.
TABLE 1-1: DEVICE VOLTAGE AND RESET PIN TIMINGS
Electrical Specifications: Unless otherwise indicated, all limits are specified for V
DD
= 1V to 5.5V, R
PU
= 100 k
(only MCP1320, MCP1321, and MCP1322), T
A
= -40°C to +125°C.
Parameters Sym Min Typ Max Units Conditions
Falling V
DD
Trip Point Detected
to RST or RST
Active
t
RPD
— 650 — µs V
DD
ramped from
V
TRIPMAX
+ 250 mV down to
V
TRIPMIN
– 200 mV,
V
DD
falling @ 5 mV/µs,
C
L
= 50 pF (Note 1)
V
DD
Rise Rate t
RR
Note 3
Reset active time
(MR
Rising Edge, POR/BOR
Inactive, or WDT time out) to
RST/RST
Inactive
t
RST
1.0 1.4 2.0 ms Note 2
20 30 40 ms Note 2
140 200 280 ms Standard Time Out
1120 1600 2240 ms Note 2
RST Rise Time after RST
Active
(Push-Pull Outputs only)
t
RT
— 5 — µs For RST 10% to 90% of V
DD
,
C
L
= 50 pF (Note 1)
RST Rise Time after RST Inactive
(Push-Pull Outputs only)
—5 —µsFor RST 10% to 90% of V
DD
,
C
L
= 50 pF (Note 1)
RST Fall Time after RST Inactive t
FT
— 5 — µs For RST 90% to 10% of V
DD
,
C
L
= 50 pF (Note 1)
RST
Fall Time after RST Active — 5 — µs For RST 90% to 10% of V
DD
,
C
L
= 50 pF (Note 1)
Note 1: These parameters are for design guidance only and are not 100% tested.
2: Custom ordered Reset active time; minimum order volume requirement.
3: Designed to be independent of V
DD
rise rate. Device characterization was done with a rise rate as slow as
0.1 V/s (@ +25°C).
V
TRIPMAX
V
TRIPMIN
V
TRIP
1V
V
DD
V
TRIPAC
+ V
HYS
t
RST
RST
RST
t
RR
t
RST
t
RPD
V
DD
< 1V is outside the device operating specification. The RST (or RST) output state is
unknown while V
DD
< 1V.