AS8515 datasheet(24/65 Pages) AMSCO

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AS8515

Datasheet - AS8515 To p Die Overview

AC Electrical Characteristics.

LIN Driver, Bus load conditions (CBUS ; RBUS): 1nF; 1k

Ω / 6, 8nF; 660Ω / 10nF; 500Ω

7.17 Timing Diagrams

Figure 15. Timing Diagram for Propagation Delays

Table 25. LIN Driver

Symbol

Parameter

Condition

Min

Typ

Max

Unit

(worst case 20Kbps transmission)

Vth_rec(max) = 0.744 x VSUP;

Vth_dom(max) = 0.581 x VSUP;

VSUP = 6.0V...18V; tbit = 50µs;

D1 = tbus_rec(min) / (2 x tbit)

0.396

(worst case 20kbps transmission)

Vth_rec (min) = 0.422 x VSUP;

Vth_dom (min) = 0.284 x VSUP;

VSUP = 6V...18V; tbit = 50µs;

D2 = tbus_rec(max) / (2 x tbit)

0.581

(worst case 10.4kbps transmission)

Vth_rec (max) = 0.778 x VSUP;

Vth_dom (max) = 0.616 x VSUP;

VSUP = 6.0V...18V; tbit = 96µs;

D3 = tbus_rec(min) / (2 x tbit)

0.417

(worst case 10.4kbps transmission)

Vth_rec (min) = 0.389 x VSUP;

Vth_dom (min) = 0.251 x VSUP;

VSUP = 6V...18V; tbit = 96µs;

D4 = tbus_rec(max) / (2 x tbit)

0.59

tdLR

VCC = 3.3V;

Propagation delay bus dominant to Rx LOW

6µs

tdHR

VCC = 3.3V;

Propagation delay bus dominant to Rx HIGH

6µs

tRS

Receiver delay symmetry

-2

µs

tWAKE

Dominant time for wake-up via LIN bus

150

µs

tsln

Transition from standby mode to normal

mode (clock frequency is 128KHz ±25%)

Clock

cycles

tnsl

Transition from normal mode to standby

mode (clock frequency is 128KHz ±25%)

Clock

cycles

trec_deb

Receiver de-bounce time

0.6

µs

Cint

Internal capacitance of the LIN node

configured as a slave with a 180pF cap on

the LIN bus

220

250

TxD

BUS

RxD

50%

95%

100

tdf_TXD

tdr_TXD

tdf_RXD

tdr_RXD

VBUS

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