21

4887D–AUTO–12/06

ATA6621

12

Watchdog Input PTRIG and NTRIG

12.1

Watchdog input

high-level threshold

V_H

PTRIG

3.5

V

A

12.2

Watchdog input low

threshold

1.5

V

A

12.3

Internal pull down PTRIG

Internal pull down PTRIG

Rpd

PTRIG

250

600

k

Ω

A

13

Watchdog Oscillator

13.1

Voltage at WD_OSC in

Normal Mode

I

V

WD_OSC

2.3

2.5

2.7

V

A

13.2

Possible values of

resistor

10

120

k

Ω

D

13.3

Oscillator period

R

t

OSC

2.1

2.6

3.1

µs

A

13.4

Oscillator period

R

t

OSC

10

12.5

15

µs

A

13.5

Oscillator period

R

t

OSC

17.9

22.4

26.8

µs

A

13.6

Oscillator period

R

t

OSC

23.2

29

34.8

µs

A

14

Watchdog Timing Relative to t

OSC

14.1

Watchdog lead time after

reset

t

d

3922

cycles

A

14.2

Watchdog closed

window

t

1

800

cycles

A

14.3

Watchdog open window

t

2

840

cycles

A

14.4

Watchdog reset time

NRES

157

cycles

A

15

Temperature Monitor at Pin TEMP

15.1

Voltage at TEMP in

Normal Mode

(T = –40°C)

2.35

2.7

V

A

15.1

Voltage at TEMP in

Normal Mode (T = 27°C)

2.0

2.35

V

A

15.1

Voltage at TEMP in

Normal Mode

(T = 125°C)

1.4

1.9

V

A

15.2

Short current at TEMP

VTEMP = 0V

I

TEMP

–30

–15

µA

A

15.3

Temperature gradient

V

TC,TEMP

4.8

5.05

5.3

mV/k

C

16

Wake Pin

16.1

High-level input voltage

V

WAKEH

V

V

V

A

16.2

Low-level input voltage

Initializes a wake-up signal

V

WAKEL

–27

V

V

A

16.3

Wake pull-up current

V

I

WAKE

–30

–10

µA

A

16.4

High-level leakage

current

V

I

WAKEL

–5

+5

µA

A

5.

Electrical Characteristics (Continued)

No.

Parameters

Test Conditions

Pin

Symbol

Min

Typ

Max

Unit

Type*

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