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AS3953

Datasheet - E le c t r i ca l C h a ra c t e r is t i c s

6 Electrical Characteristics

All in this specification defined tolerances for external components need to be assured over the whole operation conditions range and also over

lifetime.

6.1 Operating Conditions

6.2 DC/AC Characteristics for Digital Inputs and Outputs

Symbol

Parameter

Min

Typ

Max

Units

Note

Limiter current

30

mA

Till this current limiter clamps

VLC1-LC2 to 5.0V

SPI power supply

1.65

3.6

V

When logic powered from RFID

interface

1.8

3.6

V

When logic powered from VP_SPI

interface

Ambient temperature

-40

85

ºC

Symbol

Parameter

Min

Typ

Max

Units

Note

High level input voltage

0.7 * VP_SPI

V

Low level input voltage

0.3 * VP_SPI

V

Input leakage current

1

µA

Symbol

Parameter

Min

Typ

Max

Units

Note

High level output voltage

0.9 * VP_SPI

V

VP_SPI = 3V

Low level output voltage

0.1 * VP_SPI

V

Capacitive load

50

pF

Output Resistance

200

400

Ω

Pull-down resistance pad MOSI

10

k

Ω

Pull-down can be enabled while

MISO output is in tristate. The

activation is controlled by register

setting