SMS2902SA datasheet(4/14 Pages) SUMMIT

部件名	SMS2902SA

功能描述	Voltage Supervisory Circuit With Watchdog Timer

PDF	14 Pages

Scroll/Zoom	100%

制造商	SUMMIT [Summit Microelectronics, Inc.]

网页	http://www.summitmicro.com

标志

4 / 14 page

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

4.50

4.625

4.75

2.7

2.55

2.65

2.75

tPURST

Reset Timeout

200

tRPD

VTRIP to RESET Output Delay

µs

VRVALID

RESET Output Valid to VCC min. Guarantee

tGLITCH

Glitch Reject Pulse Width note 1

VOLRS

RESET Output Low Voltage IOL = 1mA

0.4

VOHRS

RESET High Voltage Output IOH = 800µA

VCC-.75

VULH

VSENSE Under-voltage threshold low to high

1.20

1.25

1.30

VUHL

VSENSE Under-voltage threshold high to low

1.20

1.25

1.30

VOLH

VSENSE Over-voltage threshold low to high

1.20

1.25

1.30

VOHL

VSENSE Over-voltage threshold high to low

1.20

1.25

1.30

tVD1

Delay to VLOW Active

µs

tVD2

Delay to VLOW Released

µs

tWDTO

Watchdog timeout Period

1600

VCC

VRVALID

VTRIP

tPURST

RESET#

RESET

2028 T fig02 2.0

tGLITCH

tRPD

tPURST

tRPD

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