SPSB081 datasheet(67/137 Pages) STMICROELECTRONICS

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2. The bit time TBIT is the nominal bit time at a given bit rate (TBIT = 1/BR). For example at BR = 2 Mb/s → TBIT = 500 ns

Table 41. CAN transmit data input: Pin TxDC

Symbol

Parameter

Condition

Min Typ Max Unit Item

VTXDCLOW

Input voltage dominant level

Active mode

1.0 1.45 2.0

E.008

VTXDCHIGH

Input voltage recessive level

Active mode

1.2 1.85 2.3

E.009

VTXDCHYS

VTXDCHIGH - VTXDCLOW

Active mode

0.2

0.7

E.010

RTXDCPU

TXDC pull up resistor

Active mode

110

kΩ

E.011

td,TXDC(dom-rec)

TXDC - CANH,L delay time dominant -

recessive

RL = 50 Ω…65 Ω;

70 % VTXD - 30% VDIFF

5.5 V ≤ VSREG ≤ 18 V

TXDC rise time = 10 ns (10% - 90%)

120

E.012

td,TXDC(rec-diff)

TXDC - CANH,L delay time recessive -

dominant

RL = 50 Ω…65 Ω

30 % VTXD - 70% VDIFF

5.5 V ≤ VSREG ≤ 18 V

TXDC fall time = 10 ns (90% - 10%)

120

E.013

tdom(TXDC)

TXDC dominant time-out

Tested by scan

0.8

ms E.014

Table 42. CAN receive data output: Pin RxDC

Symbol

Parameter

Condition

Min

Typ

Max Unit Item

VRXDCLOW

Output voltage dominant level

Active mode, IRXDC = 2 mA

0.2

0.5

E.015

VRXDCHIGH

Output voltage recessive level

Active mode, IRXDC = -2 mA V1 - 0.5 V1 - 0.2 V1

E.016

tr,RXDC

RxDC rise time

CL = 15 pF

30% - 70% VRXDC(1)

E.017

tf,RXDC

RxDC fall time

CL = 15 pF

70% - 30% VRXDC(1)

E.018

td, RXDC(dom-rec)

CANH,L

RxDC delay time dominant - recessive

CL = 15 pF

30% VDIFF - 70% VRXDC(1)

120

E.019

td, RXDC(rec - dom)

CANH,L

RxDC delay time dominant - recessive

CL = 15 pF

70% VDIFF - 30% VRXDC(1)

120

E.020

1. Guaranteed by design.

Table 43. CAN transmitter dominant output characteristics

Symbol

Parameter

Condition

Min Typ Max Unit Item

VCANHdom

Single ended CANH voltage level in dominant

state

VTXDC = VTXDCLOW

RL = 50 Ω…65 Ω

2.75 3.5

4.5

E.021

VCANLdom

Single ended CANL voltage level in dominant

state

VTXDC = VTXDCLOW

RL = 50 Ω…65 Ω

0.5

1.5 2.25

E.022

VDIFF,dom

Differential output voltage in dominant state:

VCANHdom - VCANLdom

VTXDC = VTXDCLOW

RL = 50 Ω…65 Ω

1.5

2.0

E.023

SPSB081

CAN FD transceiver

DS14048 - Rev 3

page 67/137

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