LV25450PNW

Power on/Power off Timing and the Power on Reset

Recommended Operating Ratings at Ta = 25°C, GND = 0V

Ratings

Parameter

Symbol

Conditions

min

typ

max

Unit

Vcop H

Pin 3, 27, 35, 54, 55, 61

7.5

8.5

V

Operating supply voltage

Vcop L

Pin 16, 25, 41

4.5

5.5

V

VREG3

Pin 26

2.7

3.3

V

Internal logic voltage

VREG4

Pin 15

3.7

4.3

V

Power application time

(8.0 V

→ 5.0 V)

T7

10

100

ms

Vhmin3

Pin 26 : Design reference value

VREG3

2.2

V

Internal register retention voltage

Vhmin4

Pin 15 : Design reference value

VREG4

2.2

V

Internal register reset voltage

Voff

Pin 16, 25, 41 : Design reference value

0

0.2

V

Internal register reset power

supply rise time

tPOR

Pin 16, 25, 41 : Design reference value

0.05

3

ms

Power application time

(5.0 V

→ 8.0 V)

T14

10

100

ms

Power-on Sequence and Power-on Reset

(1) Power on image and power on reset

Recommended Operating Ratings at Ta = 25°C, GND = 0V

Ratings

Parameter

Symbol

Conditions

min

typ

max

Unit

Vcop H

Pins 3, 27, 35, and 61

7.5

8.5

V

Operating supply voltage

Vcop L

Pins16, 25, and 41

4.5

5.5

V

VREG3

Pin 26

2.7

3.3

V

Internal logic voltage

VREG4

Pin 15

3.7

4.3

V

Vhmin3

Pin 26 : Design reference value

2.2

VREG3

V

Internal register retention voltage

Vhmin4

Pin 15 : Design reference value

2.2

VREG4

V

Internal register reset voltage

Voff

Pins 16, 25, and 41 : Design reference value

0

0.2

V

Internal register reset power

supply rise time

tPOR

Pins 16, 25, and 41 : Design reference value

0.05

3

ms

Note 1 : When reading out data from pin D0 connection (e.g., E2PROM) with the voltage at the pin 23 below 2.2V, be sure to read the data after transmitting

the control data and pin D0 being set “open” because the state of internal register cannot be specified.

Note 2 : It is necessary to set data when power is first applied or there is a momentary power interruption.

VCC_8Vop

VCC_5Vop

VREG4

VREG3

Vhmin3

Vhmin4

Voff

tPOR

Image of Supply Voltage

No.A1668-3/40