MCP2025-330ESLASHP datasheet(18/36 Pages) MICROCHIP

18 / 36 page

MCP2025

DS22306A-page 18

 2012 Microchip Technology Inc.

2.4

AC Specification

AC CHARACTERISTICS

VBB = 6.0V to 18.0V; TA = -40°C to +125°C

Parameter

Sym.

Min.

Typ.

Max.

Units

Test Conditions

Bus Interface - Constant Slope Time Parameters (DC specifications are for a VBB range of 6.0 to 18.0V)

Slope rising and falling

edges

tSLOPE

3.5

—

22.5

µs

7.3V <= VBB <= 18V

Propagation Delay of

Transmitter

tTRANSPD

——

6.0

µs

tTRANSPD = max (tTRANSPDR

or tTRANSPDF)

Propagation Delay of

Receiver

tRECPD

——

6.0

µs

tRECPD = max (tRECPDR or

tRECPDF)

Symmetry of Propagation

Delay of Receiver rising

edge w.r.t. falling edge

tRECSYM

-2.0

—

2.0

µs

trecsym = max (trecpdf –

trecpdr)

RRXD 2.4K

to VCC, CRXD

20pF

Symmetry of Propagation

Delay of Transmitter rising

edge w.r.t. falling edge

tTRANSSYM

-2.0

—

2.0

µs

tTRANSSYM = max (tTRANSPDF

- tTRANSPDR)

Bus dominant time-out time

tTO(LIN)

—25

—

Duty Cycle 1 @20.0 kbit/sec

.396

—

%tBIT

CBUS;RBUS conditions:

1nF; 1 k

 | 6.8 nF; 660 |

10 nF; 500



THREC(MAX) = 0.744 x VBB,

THDOM(MAX) = 0.581 x VBB,

VBB =7.0V - 18V; tBIT = 50 µs.

D1 = tBUS_REC(MIN) / 2 x tBIT)

Duty Cycle 2 @20.0 kbit/sec

—

.581

%tBIT

CBUS;RBUS conditions:

1nF; 1 k

 | 6.8 nF; 660 |

10 nF; 500



THREC(MAX) = 0.284 x VBB,

THDOM(MAX) = 0.422 x VBB,

VBB =7.6V - 18V; tBIT = 50 µs.

D2 = tBUS_REC(MAX) / 2 x tBIT)

Duty Cycle 3 @10.4 kbit/sec

.417

—

%tBIT

CBUS;RBUS conditions:

1nF; 1 k

 | 6.8 nF; 660 |

10 nF; 500



THREC(MAX) = 0.778 x VBB,

THDOM(MAX) = 0.616 x VBB,

VBB =7.0V - 18V; tBIT = 96 µs.

D3 = tBUS_REC(MIN) / 2 x tBIT)

Duty Cycle 4 @10.4 kbit/sec

—

.590

%tBIT

CBUS;RBUS conditions:

1nF; 1 k

 | 6.8 nF; 660 |

10 nF; 500



THREC(MAX) = 0.251 x VBB,

THDOM(MAX) = 0.389 x VBB,

VBB =7.6V - 18V; tBIT = 96 µs.

D4 = tBUS_REC(MAX) / 2 x tBIT)

Note 1:

Time depends on external capacitance and load. Test condition: CREG = 4.7uF, no resistor load.

For design guidance only, not tested.

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