MCP131X datasheet(8/44 Pages) MICROCHIP

8 / 44 page

MCP131X/2X

DS21985A-page 8

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 VDD = 1V to 5.5V, RPU = 100 kΩ

(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Falling VDD Trip Point Detected

to RST or RST Active

tRPD

—

650

—

μsVDD ramped from

VTRIPMAX + 250 mV down to

VTRIPMIN – 200 mV,

VDD falling @ 5 mV/μs,

CL = 50 pF (Note 1)

VDD Rise Rate

tRR

Note 3

Reset active time

(MR Rising Edge, POR/BOR

Inactive, or WDT time out) to

RST/RST Inactive

tRST

1.0

1.4

2.0

Note 2

140

200

280

Standard Time Out

1120

1600

2240

Note 2

RST Rise Time After RST Active

(Push-Pull Outputs only)

tRT

—5

—

μs

For RST 10% to 90% of VDD,

CL = 50 pF (Note 1)

RST Rise Time After RST Inactive

(Push-Pull Outputs only)

—5

—

μsFor RST 10% to 90% of VDD,

CL = 50 pF (Note 1)

RST Fall Time after RST Inactive

tFT

—5

—

μs

For RST 90% to 10% of VDD,

CL = 50 pF (Note 1)

RST Fall Time after RST Active

—

μsFor RST 90% to 10% of VDD,

CL = 50 pF (Note 1)

Note 1:

These parameters are for design guidance only and are not 100% tested.

Custom ordered Reset active time; minimum order volume requirement.

Designed to be independent of VDD rise rate. Device characterization was done with a rise rate as slow as

0.1 V/s (@ +25°C).

VTRIPMAX

VTRIPMIN

VTRIP

VDD

VTRIPAC + VHYS

tRST

RST

tRR

tRST

tRPD

VDD < 1V is outside the device operating specification. The RST (or RST) output state is

unknown while VDD < 1V.

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