ATA6663-FAQW datasheet(14/20 Pages) ATMEL

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9146D–AUTO–09/10

Atmel ATA6663/ATA6664

LIN Bus Driver AC Parameter with Different Bus Loads

Load 1 (small): 1nF, 1k

Ω ; Load 2 (large): 10nF, 500Ω ; R

RXD = 5kΩ ; CRXD = 20pF;

Load 3 (medium): 6.8nF, 660

Ω characterized on samples; 10.1 and 10.2 specifies the timing parameters for proper

operation at 20Kbit/s, 10.3 and 10.4 at 10.4Kbit/s.

10.1

Duty cycle 1

Rec(max) = 0.744 × VS

Dom(max) = 0.581 × VS

VS = 7.0V to 18V

Bit = 50µs

D1 = t

bus_rec(min) /(2 × tBit)

6D1

0.396

10.2

Duty cycle 2

Rec(min) = 0.422 × VS

THDom(min) = 0.284 × VS

S = 7.0V to 18V

Bit = 50µs

D2 = tbus_rec(max) /(2 × tBit)

0.581

10.3

Duty cycle 3

THRec(max) = 0.778 × VS

Dom(max) = 0.616 × VS

S = 7.0V to 18V

tBit = 96µs

D3 = t

bus_rec(min) /(2 × tBit)

6D3

0.417

10.4

Duty cycle 4

Rec(min) = 0.389 × VS

Dom(min) = 0.251 × VS

VS = 7.0V to 18V

Bit = 96µs

D4 = t

bus_rec(max) /(2 × tBit)

0.590

Receiver Electrical AC Parameters of the LIN Physical Layer

LIN receiver, RXD load conditions: CRXD = 20pF, Rpull-up = 5kΩ

11.1

Propagation delay of receiver

(see Figure 6-1 on page 15)

trec_pd = max(trx_pdr , trx_pdf)

S = 7.0V to 18V

1trx_pd

6µs

11.2

Symmetry of receiver

propagation delay rising edge

minus falling edge

trx_sym = trx_pdr – trx_pdf

S = 7.0V to 18V

1trx_sym

–2

µs

Electrical Characteristics (Continued)

5V < VS < 27V, Tj = –40°C to +150°C

No.

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

Type*

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

ATA6663-FAQW Datasheet(PDF) 14 Page - ATMEL Corporation

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