33663 datasheet(30/37 Pages) FREESCALE

30 / 37 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

33663

FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

FAIL-SAFE FEATURES

Tables 7 describes the 33663 protections.

Table 7. Fail Safe Features

BLOCK

FAULT

FUNCTIONA

L MODE

CONDITION

FALLOUT

RECOVERY

CONDITION

RECOVERY

FUNCTIONALITY

MODE

Power

Supply

Power on Reset

(POR)

All modes

VSUP < 3.5 V (min) then

power up

No internal supplies

Condition

gone

Device goes in Awake

mode whatever the

previous device mode

INH1

INH2

INH1 AND/OR

INH2 Thermal

Shutdown.

Each LIN Module

has its own INH

Thermal

Shutdown.

For the failed

LIN Module:

Normal,

Awake &

Preparation to

Sleep modes

Temperature > 160 °C

(typ)

INH high side of the

failed LIN Module turned

off and its LIN

transmitter and receiver

in recessive State

Condition

gone

LIN Module returns in

same functional mode

LIN1

LIN2

VSUP under-

voltage

Normal

VSUP < VUVL

Both LIN transmitters in

recessive state

Condition

gone

Device returns in same

functional mode

TXD1 AND/OR

TXD2 Pins

Permanent

Dominant

TXD pin low for more than

5.0 ms (typ)

LIN transmitter of the

failed LIN Module in

recessive state

Condition

gone

LIN Module returns in

same functional mode

LIN1 AND/OR

LIN2 Thermal

Shutdown.

Each LIN Module

has its own LIN

Thermal

Shutdown.

Normal mode

Temperature > 160 °C

(typ)

LIN transmitter and

receiver of the failed LIN

Module in recessive

state and its INH high

side turned off

Condition

gone

LIN Module returns in

same functional mode

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