18

4887D–AUTO–12/06

ATA6621

4EN Input Pin

4.1

Low-level voltage input

–0.3

+1.5

V

A

4.2

High-level voltage input

V

ENH

3.5

VCC +

0.3V

VA

4.3

Pull-down resistor

V

R

EN

125

250

600

k

Ω

A

4.4

Low-level input current

V

I

EN

–3

+3

µA

A

5

NRES Output Pin

5.1

High-level output voltage

V

I

4.5

V

A

5.2

Low-level output voltage

V

I

0.2

0.14

V

V

A

A

5.3

Low-level output low

10 k

Ω to VCC;

V

0.3

V

A

5.4

Undervoltage reset time

V

t

reset

713

ms

A

5.5

Reset debounce time for

falling edge

C

t

res_f

3µs

A

6

Voltage Regulator VCC Pin in Normal and Pre Normal Mode

6.1

Output voltage VCC

5.5V < V

(0 mA to 50 mA)

4.9

5.1

V

A

6.2

Output voltage VCC at

low VS

3.3V < V

VCC

low

5.1

V

A

6.3

Regulator drop voltage

250

mV

A

6.4

Regulator drop voltage

500

mV

A

6.5

Regulator drop voltage

200

mV

A

6.6

Output current

–50

mA

A

6.7

Output current limitation

–200

–130

mA

A

6.8

Load capacity

1

Ω < ESR < 5Ω

1.8

2.2

µF

D

6.9

VCC undervoltage

threshold

Referred to VCC

V

4.4

4.8

V

A

6.10

Hysteresis of

undervoltage threshold

Referred to VCC

30

mV

A

6.11

to VCC > 4.9V

No load

t

VCC

300

µs

A

7

Voltage Regulator VCC Pin in Silent Mode

7.1

Output voltage VCC

(0 mA to 50 mA)

4.65

5.35

V

A

7.2

Output voltage VCC at

low VS

3.3V < V

VCC

low

V

VS

5.1

V

A

7.3

Regulator drop voltage

200

mV

A

5.

Electrical Characteristics (Continued)

No.

Parameters

Test Conditions

Pin

Symbol

Min

Typ

Max

Unit

Type*

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter