ST8024CDR datasheet(10/30 Pages) STMICROELECTRONICS

10 / 30 page

Electrical characteristics

ST8024

10/30

tT(DI)

Data Input transition time

VIL max to VIH min

1.2

µs

tT(DO)

Data Output transition time

VO = 0 to VCC; CL ≤80 pF; 10% to

90%

0.1

µs

IPU

Current when pull-up active

VOH = 0.9VCC; CL = 80 pF

-1

Table 10.

Data lines to card reader (pins I/O, AUX1 AND AUX2 with integrated 11k

Ω Pull-up

resistor to VCC (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted. Typical

values are to TA = 25°C)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Table 11.

Data lines to microcontroller (pins I/OUC, AUX1UC AND AUX2UC with integrated 11k

Ω

Pull-up resistor to VDD (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted.

Typical values are to TA = 25°C)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

VOH

High Level Output Voltage

5 and 3 V card; IOH < −40µA

0.75 VDD

VDD+0.1

No DC Load

0.9 VDD

VDD+0.1

VOL

Low Level Output Voltage

IOL = 1 mA

0.3

VIH

High Level Input Voltage

0.7 VDD

VDD+0.3

VIL

Low Level Input Voltage

-0.3

0.3 VDD

|ILIH|

High Level Input Leakage

Current

VIH = VDD

µA

|IL|

Low Level Input Current

VIL = 0 V

600

µA

RPU

Internal pull-up resistance to

VDD

Pull-up resistor to VDD

911

Ω

tT(DI)

Data Input transition time

VIL(max) to VIH(min)

1.2

µs

tT(DO)

Data Output transition time

VO = 0 to VDD; CL < 30 pF;

10% to 90%

0.1

µs

IPU

Current when pull-up active

VOH = 0.9VDD; CL = 30 pF

-1

Table 12.

Internal oscillator (VDD = 3.3V, VDDP = 5V, fXTAL = 10MHz, unless otherwise noted.Typical

values are to TA = 25°C)

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

fOSC(INT)

Frequency of internal oscillator

Inactive mode

140

200

kHz

Active mode

2.2

2.7

3.2

MHz

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