ST25R3910 datasheet(59/65 Pages) STMICROELECTRONICS

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ST25R3910

Electrical characteristics

3.2

Operating conditions

All defined tolerances for external components in this specification need to be assured over

the whole operating conditions range and over lifetime.

3.3

DC/AC characteristics for digital inputs and outputs

3.3.1

CMOS inputs

Valid for input pins EN, SEN, SDATAI, TEST and SCLK.

3.3.2

CMOS outputs

Valid for output pins SDATAO, INTR and MCU_CLK.

Table 40. Operating conditions

Symbol

Parameter

Min

Max

Unit

Comments

VDD

Positive supply voltage

2.4

3.6

In case power supply is lower than 2.6 V, PSSR

cannot be improved using internal regulators

(minimum regulated voltage is 2.4 V).

VSS

Negative supply voltage

VINTRIM

Input pin voltage

TRIM pins

-30

TAMB

Ambient temperature

-40

°C

Table 41. CMOS inputs

Symbol

Parameter

Min

Typ

Max

Unit

VIH

High level input voltage

0.7 * VDD

VIL

Low level input voltage

0.3 * VDD

ILEAK

Input leakage current

µA

RPD

Pull down resistance (pad EN)

100

kΩ

Table 42. CMOS outputs

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VOH

High level output

voltage

ISOURCE = 1mA

0.9 * VDD

VOL

Low level output

voltage

ISINK = 1mA

0.1 * VDD

Capacitive load

Output resistance

250

550

Ω

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