ST8024LCDR datasheet(11/35 Pages) STMICROELECTRONICS

11 / 35 page

ST8024L

Electrical characteristics

Doc ID 17709 Rev 5

11/35

Table 7.

Step-up converter

Symbol

Parameter(1)

Test conditions

Min.

Typ.

Max.

Unit

fCLK

Clock frequency

Card active

2.2

3.2

MHz

Vth(vd-vf)

Threshold voltage for

step-up converter to

change to voltage

follower

5 V card

5.2

5.8

6.2

3 V card

3.8

4.1

4.4

1.8 V card

3.8

4.1

4.4

VUP

Output voltage on pin

VUP (average value)

5 V card

5.2

5.7

6.2

3 V card

3.5

3.9

4.3

1.8 V card

3.5

3.9

4.3

VDD = 3.3 V, VDDP = 5 V, fXTAL = 10 MHz, unless otherwise noted. Typical values are at TA = 25 °C.

Table 8.

Card supply voltage characteristics

Symbol

Parameter(1)

Test conditions

Min.

Typ.

Max.

Unit

CVCC

External capacitance

on pin VCC

See(2)

400

VCC

Card supply voltage

(including ripple

voltage)

Card inactive; |ICC| = 0 mA

5 V, 3 V and

1.8 V card

-0.1

0.1

Card inactive; |ICC| = 1 mA

5 V, 3 V and

1.8 V card

-0.1

0.3

Card active; |ICC| < 80 mA

5 V card

4.75

5.25

Card active; |ICC| < 65 mA

3 V card

2.85

3.15

Card active; |ICC| < 45 mA

1.8 V card

1.68

1.8

1.92

Card active; single current

pulse IP = –100 mA; tp = 2 µs

5 V card

4.65

5.25

Card active; single current

pulse IP = –100 mA; tp = 2 µs

3 V card

2.76

3.20

Card active; single current

pulse IP = –100 mA; tp = 2 µs

1.8 V card

1.62

1.8

1.98

Card active; current pulses,

QP = 40 nAs

5 V card

4.65

5.25

3 V card

2.76

3.20

1.8 V card

1.62

1.8

1.98

Card active; current pulses

QP = 40 nAs with

|ICC| < 200 mA, tp < 400 ns

5 V card

4.65

5.25

3 V card

2.76

3.20

1.8 V card

1.62

1.8

1.98

VCC

(RIPPLE)

(P-P)

Ripple voltage on

VCC (peak-to-peak

value)

fRIPPLE = 20 kHz to 200 MHz

350

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