MCP2551T-E/P データシートの表示（PDF） - Microchip Technology

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MCP2551T-E/P

High-Speed CAN Transceiver

Microchip Technology 

MCP2551

TABLE 1-1:

Mode

Standby

Slope-Control

High-Speed

MODES OF OPERATION

Current at Rs Pin

-IRS < 10 µA

10 µA < -IRS < 200 µA

-IRS < 610 µA

Resulting Voltage at RS Pin

VRS > 0.75 VDD

0.4 VDD < VRS < 0.6 VDD

0 < VRS < 0.3VDD

TABLE 1-2: TRANSCEIVER TRUTH TABLE

VDD

VRS

TXD

CANH

CANL

Bus State( 1) RXD( 1)

0

HIGH

LOW

Dominant

0

4.5V ≤ VDD ≤ 5.5V

VRS < 0.75 VDD

1 or floating

Not Driven

Not Driven

Recessive

1

VRS > 0.75 VDD

X

Not Driven

Not Driven

Recessive

1

0

HIGH

LOW

Dominant

0

VPOR < VDD < 4.5V

(See Note 3)

VRS < 0.75 VDD

1 or floating

Not Driven

Not Driven

Recessive

1

VRS > 0.75 VDD

X

Not Driven

Not Driven

Recessive

1

0 < VDD < VPOR

X

X

Not Driven/

No Load

Not Driven/

No Load

High Impedance

X

Note 1: If another bus node is transmitting a Dominant bit on the CAN bus, then RXD is a logic ‘0’.

2: X = “don’t care”.

3: Device drivers will function, although outputs are not ensured to meet the ISO-11898 specification.

FIGURE 1-1:

SLEW RATE VS. SLOPE-CONTROL RESISTANCE VALUE

25

20

15

10

5

0

10 20 30 40 49 60 70 76 90 100 110 120

Resistance (kŸ)

DS21667F-page 4

© 2010 Microchip Technology Inc.

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