 2002 Microchip Technology Inc.

Preliminary

DS21667C-page 11

MCP2551

2.3

AC Characteristics

AC Specifications

Electrical Characteristics:

Param

No.

Sym

Characteristic

Min

Max

Units

Conditions

Bit time

1

62.5

µs

Bit frequency

16

1000

kHz

3

TtxL2bus(d) Delay TXD to bus active

—

70

ns

-40°C

4

TtxH2bus(r)

Delay TXD to bus inactive

—

125

ns

-40°C

—

170

ns

-40°C

5

TtxL2rx(d)

Delay TXD to receive active

—

130

ns

-40°C

—

250

ns

-40°C

Ω

6

TtxH2rx(r)

Delay TXD to receiver

inactive

—

175

ns

-40°C

—

225

ns

-40°C

Ω

—

235

ns

-40°C

—

400

ns

-40°C

Ω

7

SR

CANH, CANL slew rate

5.5

8.5

V/µs

Refer to Figure 1-1;

Ω, (Note 1)

10

Wake-up time from standby

(Rs pin)

—

5

µs

see Figure 2-6

11

TbusD2rx(s) Bus dominant to RXD Low

(standby mode)

—

550

ns

12

CANH; CANL input

capacitance

—20

(typical)

pF

1 Mbit/s data rate;

13

Differential input

capacitance

—10

(typical)

pF

1 Mbit/s data rate

(Note 1)

14

TtxL2busZ

TX Permanent Dominant

Timer Disable Time

1.25

4

ms

15

TtxR2pdt(res) TX Permanent Dominant

Timer Reset Time

—

1

µs

Rising edge on TXD while

device is in permanent

dominant state

Note 1: This parameter is periodically sampled and not 100% tested.