L9965T datasheet(57/62 Pages) STMICROELECTRONICS

57 / 62 page

Contents

Overview ..........................................................................2

Block diagram and pin description .................................................4

2.1

Block diagram ................................................................. 4

2.2

Pin description ................................................................. 5

Device ratings .....................................................................8

3.1

Electrical ratings ............................................................... 8

3.2

ESD ratings ................................................................... 9

3.3

Thermal ratings ............................................................... 10

Current consumption .............................................................11

Functional description ............................................................12

5.1

Device functional states ........................................................ 12

5.1.1

NORMAL State and wakeup sources ........................................ 13

5.1.2

CYCLIC_WAKEUP State ................................................. 15

5.1.3

Electrical parameters .................................................... 18

5.2

Power supply section .......................................................... 20

5.2.1

VB battery supply ....................................................... 20

5.2.2

VIO output buffer supply .................................................. 20

5.2.3

V3V3 internal LDO ...................................................... 20

5.2.4

5V LDO (V5V) .......................................................... 21

5.3

Analog BIST.................................................................. 22

5.3.1

Diagnostic functions ..................................................... 23

5.4

Thermal shutdown............................................................. 23

5.4.1

Diagnostic functions ..................................................... 23

5.4.2

Electrical parameters .................................................... 24

5.5

Ground loss monitor ........................................................... 24

5.5.1

Diagnostic functions ..................................................... 24

5.5.2

Electrical parameters .................................................... 24

5.6

Oscillators ................................................................... 24

5.6.1

Diagnostic functions ..................................................... 25

5.6.2

Electrical parameters .................................................... 25

5.7

Communication interfaces ...................................................... 25

5.7.1

SPI target ............................................................. 26

5.7.2

Isolated Vertical Interface (VIF) ............................................. 31

5.8

Communication protocol ....................................................... 34

5.8.1

Addressing procedure .................................................... 34

L9965T/L9965TS

Contents

DS14987 - Rev 1

page 57/62

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