S-19501AFJA-E8T1U4 datasheet(8/52 Pages) SII

Part #	S-19501AFJA-E8T1U4

Description	CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION

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Manufacturer	SII [Seiko Instruments Inc]

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FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION

S-19500/19501 Series

Rev.1.2_01

8



Recommended Operation Conditions

Table 9

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

VIN pin voltage

VIN

−

4.0

−

36.0

V

When using autonomous

watchdog operation function*1

VOUT(S)

+ 1.0

−

36.0

V

VOUT pin voltage

VOUT

Detector block

1.0

−

V

Watchdog timer block

+VDET

−

V

Watchdog input voltage "H"*2 VWIH

−

2

−

V

Watchdog input voltage "L"*2 VWIL

−

0.8

V

Watchdog input "H" time*2

thigh

VWI

≥ VWIH

5.0

−

μs

Watchdog input "L" time*2

tIow

VWI

≤ VWIL

5.0

−

μs

Slew rate*2

dVWI

dt

VWI = VWIL

+ (VWIH − VWIL) × 0.1

to VWIL

+ (VWIH − VWIL) × 0.9

1

−

V/

μs

Watchdog input frequency

fWI

Duty ratio 50%

−

0.2

MHz

WEN pin input voltage "H"

VWENH

−

2.0

−

VOUT(S)

V

WEN pin input voltage "L"

VWENL

−

0

−

0.8

V

*1. Refer to "3. Watchdog timer block" in " Operation" for the autonomous watchdog operation function.

*2. When inputting a rising edge that satisfies the condition of Figure 4 to the WI pin, the watchdog timer detects a

trigger.

The signal input from the monitored object by the watchdog timer should satisfy the condition of Figure 4.

VWIH

VWIL

VWI

tlow

thigh

dVWI

dt

t

Figure 4

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S-19501AFJA-E8T1U4 Datasheet(PDF) 8 Page - Seiko Instruments Inc

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