SMS2902S datasheet(4/14 Pages) SUMMIT

номер детали	SMS2902S

подробное описание детали	Voltage Supervisory Circuit With Watchdog Timer

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производитель	SUMMIT [Summit Microelectronics, Inc.]

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4

SMS2902/SMS2904/SMS2916

2028 5.1 8/2/00

FIGURE 2. RESET OUTPUT TIMING

RESET CIRCUIT AC and DC ELECTRICAL CHARACTERISTICS

TA=-40°C to +85°C

Symbol

Parameter

Part no.

Min.

Typ.

Max.

Unit

Suffix

VTRIP

Reset Trip Point

A (or) Blank

4.250

4.375

4.5

V

B

4.50

4.625

4.75

V

2.7

2.55

2.65

2.75

V

tPURST

Reset Timeout

200

ms

tRPD

VTRIP to RESET Output Delay

5

µs

VRVALID

RESET Output Valid to VCC min. Guarantee

1

V

tGLITCH

Glitch Reject Pulse Width note 1

30

ns

VOLRS

RESET Output Low Voltage IOL = 1mA

0.4

V

VOHRS

RESET High Voltage Output IOH = 800µA

VCC-.75

V

VULH

VSENSE Under-voltage threshold low to high

1.20

1.25

1.30

V

VUHL

VSENSE Under-voltage threshold high to low

1.20

1.25

1.30

V

VOLH

VSENSE Over-voltage threshold low to high

1.20

1.25

1.30

V

VOHL

VSENSE Over-voltage threshold high to low

1.20

1.25

1.30

V

tVD1

Delay to VLOW Active

5

µs

tVD2

Delay to VLOW Released

5

µs

tWDTO

Watchdog timeout Period

1600

ms

VCC

VRVALID

VTRIP

tPURST

RESET#

RESET

2028 T fig02 2.0

tGLITCH

tRPD

tPURST

tRPD

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