S-19401A20A-K8T2U4 datasheet(10/36 Pages) SII

Part #	S-19401A20A-K8T2U4

Description	Watchdog operation voltage range

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Manufacturer	SII [Seiko Instruments Inc]

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FOR AUTOMOTIVE 125°C OPERATION LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION

S-19400/19401 Series

Rev.2.1_00

10



Electrical Characteristics

Table 9 (1 / 2)

(WEN pin logic active "H" product, VDD = 5.0 V, Ta =

−40°C to +125°C unless otherwise specified)

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Test

Circuit

Detection voltage

*1

−VDET

−

−VDET(S)

× 0.98

−VDET(S)

× 1.02

V

1

Hysteresis width

VHYS

−

−VDET

× 0.03

−VDET

× 0.05

−VDET

× 0.07

V

1

Current consumption

during operation

ISS1

When watchdog timer operates

−

3.8

9.0

μA

2

Reset time-out period

tRST

CPOR = 2200 pF

8.7

14.5

20

ms

3

Watchdog time-out period

tWDU

CWDT = 470 pF

15

24.6

34

ms

3

Watchdog double pulse

detection time

tWDL

CWDT = 470 pF

461

769

1077

μs

4

Reset output voltage "H"

VROH

S-19401 Series A / B / C / D /

E / F type only

VDD

− 1.0

−

V

5

Reset output voltage "L"

VROL

−

0.4

V

6

Reset output pull-up current

IRUP

VRST

_______

= 0 V,

S-19401 Series A / B / C / D /

E / F type only

−

−0.85

−0.4

μA

7

Reset output current

IROUT

VDS = 0.4 V,

S-19401 Series

only

VDD = 1.5 V

0.48

1.1

−

mA

8

VDD = 1.8 V

0.8

1.6

−

mA

8

VDD = 2.5 V

1.0

2.6

−

mA

8

VDD = 3.0 V

1.4

3.3

−

mA

8

Reset output leakage current IRLEAK

VDS = 6.0 V, VDD = 6.0 V,

S-19401 Series only

−

0.096

μA

9

Watchdog output voltage "H" VWOH

A / B / C / D / E / F type only

VDD

− 1.0

−

V

10

Watchdog output voltage "L" VWOL

−

0.4

V

11

Watchdog output

pull-up current

IWUP

VWDO

________

= 0 V,

A / B / C / D / E / F type only

−

−0.85

−0.4

μA

12

Watchdog output current

IWOUT

VDS = 0.4 V

VDD = 1.5 V

0.48

1.1

−

mA

13

VDD = 1.8 V

0.8

1.6

−

mA

13

VDD = 2.5 V

1.0

2.6

−

mA

13

VDD = 3.0 V

1.4

3.3

−

mA

13

Watchdog output leakage

current

IWLEAK

VDS = 6.0 V, VDD = 6.0 V

−

0.096

μA

14

Input pin voltage 1 "H"

VSH1

WEN pin

0.7

× VDD

−

V

15

Input pin voltage 1 "L"

VSL1

WEN pin

−

0.3

× VDD

V

15

Input pin voltage 2 "H"

VSH2

W

___

/ T pin, S-19400 Series only 0.7 × VDD

−

V

15

Input pin voltage 2 "L"

VSL2

W

___

/ T pin, S-19400 Series only

−

0.3

× VDD

V

15

Input pin voltage 3 "H"

VSH3

WDI pin

0.7

× VDD

−

V

15

Input pin voltage 3 "L"

VSL3

WDI pin

−

0.3

× VDD

V

15

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S-19401A20A-K8T2U4 Datasheet(PDF) 10 Page - Seiko Instruments Inc

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