SPSB081 datasheet(58/135 Pages) STMICROELECTRONICS

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Table 32. Reset output

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Item

VRT1_5

Reset threshold voltage1

VV1 decreasing (V1 = 5 V)

3.3

3.5

3.7

C.027

VRT1_33

VV1 decreasing (V1 = 3.3 V0)

2.5

2.65

2.75

C.061

VRT2_5

Reset threshold voltage2

VV1 decreasing (V1 = 5 V)

3.6

3.8

C.028

VRT2_33

VV1 decreasing (V1 = 3.3 V)

2.6

2.75

2.85

C.062

VRT3_5

Reset threshold voltage3

VV1 decreasing (V1 = 5 V)

3.8

4.0

4.2

C.029

VRT3_33

VV1 decreasing (V1 = 3.3 V)

2.7

2.85

2.95

C.063

VRT4-1_5

Reset threshold voltage4

VV1 decreasing (V1 = 5 V)

4.4

4.6

4.8

C.030

VRT4-1_33

VV1 decreasing (V1 = 3.3 V)

2.8

2.9

3.05

C.064

VRT4-2_5

Reset threshold voltage4

VV1 increasing (V1 = 5 V)

4.65

4.8

4.9

C.031

VRT4-2_33

VV1 increasing (V1 = 3.3 V)

2.95

3.1

3.2

C.065

VRESET

Reset pin low output voltage

V1 > 1V, IRESET = 5 mA

0.2

0.4

C.032

RRESET

Reset pull up int. resistor

kΩ

C.033

tRR

Reset reaction time

Iload = 1 mA; tested by scan

μs

C.034

tUV1

V1 under-voltage filter time

Tested by scan

μs

C.035

tRD

Reset pulse duration

Tested by scan

1.5

2.0

2.5

C.036

5.6

DIAGN output

The voltages are referred to GND and currents are assumed positive, when the current flows into the pin. 4 V ≤

VS ≤ 28 V; 4 V < VSREG< 28 V; Tj = from -40 to 150°C, unless otherwise specified.

Table 33. DIAGN output

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Item

VDIAGN

DIAGN pin low

output voltage

V1 > 1V, IDIAGN = 5

0.2

0.4

C.037

RDIAGN

DIAGN pulls up int.

resistor

kΩ

C.038

5.7

Watchdog

For further information, see Section 3.6 Configurable window watchdog.

4.5 V < VS < 28 V; 4.5 V < VSREG< 28 V; Tj = from -40 to 150°C, unless otherwise specified

Table 34. Watchdog

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Item

tLW

Long open window

Tested by scan

240

300

360

A.022

TEFW1

Early failure

window 1

Tested by scan

4.5

A.023

TLFW1

Late failure window

Tested by scan

A.024

TSW1

Safe window 1

Tested by scan

7.5

A.025

TEFW2

Early failure

window 2

Tested by scan

22.3

A.026

SPSB081

DIAGN output

DS14048 - Rev 1

page 58/135

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