ST8034AT datasheet(14/39 Pages) STMICROELECTRONICS

14 / 39 page

DocID024587 Rev 4

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ST8034T, ST8034AT, ST8034P, ST8034C

Electrical characteristics

ICC(SHDN)

VCC output current in

shutdown mode

VCC connected to GND

-1

tW_VCC(5V)

CMDVCC pulse width for

VCC = 5 V, all versions

except ST8034P

See section Section 6.10.1 on page 31

tW_VCC(3V)

CMDVCC pulse width for

VCC = 3 V, all versions

except ST8034P

See section Section 6.10.1 on page 31

Device supply voltages monitoring

VTH

Falling supply voltage

threshold

VDD pin

2.3

2.4

2.5

VDDP pin (VCC = 5 V)

3.0

4.1

4.4

VDDP pin (VCC = 3 V or 1.8 V)

2.3

2.4

2.5

VDD(INTF) pin (ST8034T, ST8034AT)

1.20

1.24

1.29

PORADJ pin (ST8034P, ST8034C)

1.20

1.24

1.29

VHYS

Hysteresis on supply

voltage threshold

VDD pin

100

150

VDDP pin (VCC = 5 V)

100

200

350

VDDP pin (VCC = 3 V or 1.8 V)

100

150

VDD(INTF) pin (ST8034T, ST8034AT)

PORADJ pin (ST8034P, ST8034C)

II(PORADJ) Input current, PORADJ pin

-1

A

Power-on or undervoltage

reset pulse width (minimum)

5.1

10.2

1. TA = 25 °C, VDD = 3.3 V, VDDP = 5 V, VDD(INTF) = 3.3 V, fXTAL = 10 MHz, unless otherwise noted.

2. The device can operate at VDD supply voltage up to 5.5 V, however the specified parameters (mainly related to current

consumption and input currents) are guaranteed in the basic VDD range 2.7 to 3.6 V.

3. The device can operate at VDD(INTF) supply voltage up to 5.5 V, however the specified parameters (mainly related to current

consumption) are guaranteed in the basic VDD(INTF) range 1.6 to 3.6 V.

4. These current pulses are filtered by the decoupling capacitors on the VCC pin, therefore for the LDO just the mean value

matters.

5. Two low ESR (< 350 m

) ceramic capacitors for VCC decoupling recommended: 100 nF ± 20% (up to

330 nF ± 20%) close to the ST8034 and 100 nF ± 20% (up to 330 nF ± 20%) close to the card.

Table 7. Supply voltages (continued)

Symbol

Parameter

Test conditions(1)

Min.

Typ.

Max.

Unit

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