S4242 查看數據表（PDF） - Summit Microelectronics

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S4242

Dual Voltage Supervisory Circuit With Watchdog Timer

Summit Microelectronics 

VCC

VTRIP

VRVALID

RESET#

RESET

S4242/S42WD42/S4261/S42WD61

tGLITCH

tPURST

tRPD

tPURST

FIGURE 3. RESET OUTPUT TIMING

tRPD

2025 T fig03 2.0

RESET CIRCUIT AC and DC ELECTRICAL CHARACTERISTICS

TA=-40°C to +85°C

Symbol

Parameter

Part no.

Suffix

VTRIP

Reset Trip Point

A (or) Blank

B

2.7

tPURST

Reset Timeout

tRPD

VTRIP to RESET Output Delay

VRVALID

RESET Output Valid to VCC min. Guarantee

tGLITCH

Glitch Reject Pulse Width note 1

VOLRS

RESET Output Low Voltage IOL = 1mA

VOHRS

RESET High Voltage Output IOH = 800µA

VULH

VSENSE Under-voltage threshold low to high

VUHL

VSENSE Under-voltage threshold high to low

VOLH

VSENSE Over-voltage threshold low to high

VOHL

VSENSE Over-voltage threshold high to low

tVD1

Delay to VLOW Active

tVD2

Delay to VLOW Released

tWDTO

Watchdog timeout Period (S42WD61)

(S42WD42)

Min.

4.250

4.50

2.7

1

VCC-.75

1.20

1.20

1.20

1.20

Typ.

4.375

4.625

2.9

200

30

1.25

1.25

1.25

1.25

1600

Max.

Unit

4.5

V

4.75

V

3.10

V

ms

5

µs

V

ns

0.4

V

V

1.30

V

1.30

V

1.30

V

1.30

V

5

µs

5

µs

ms

2025 PGM T5.2

2025 6.0 4/17/00

4

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