ST25R3918 datasheet(125/141 Pages) STMICROELECTRONICS

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DS13490 Rev 2

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ST25R3918

Electrical characteristics

140

5.2

Operating conditions

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

the whole operation conditions range and also over lifetime.

Table 109. Operating conditions

Symbol

Parameter

Min

Max

Unit

VDD, VDD_TX(1) (2)

1. Referenced to VSS.

2. If power supply is lower than 2.6 V, PSSR cannot be improved using internal regulators (minimum

regulated voltage is 2.4 V).

Positive supply voltage (pins 8 and 10),

Tamb = -40 to 105 °C, rege <3:0> ≥ 07h

2.6

5.5

Positive supply voltage (pins 8 and 10),

Tamb = -20 to 105 °C

2.4

5.5

Positive supply voltage when option bit sup3V is set(3),

Tamb = -40 to 105 °C, rege <3:0> ≥ 07h

3. Bit sup3V set to 1 in IO configuration register 2.

2.6

3.6

Positive supply voltage when option bit sup3V is set(3),

Tamb = -20 to 105 °C

2.4

3.6

VDD_DR(1)

Driver positive supply voltage when driver is directly

supplied (pin 14)

Mandatory condition: VDD_DR ≤ VDD, VDD_TX

2.4

5.5

∆VDD-VDD_TX(1)

Difference between VDD and VDD_TX

-0.2

0.2

VDD_IO(1)

Peripheral communication supply voltage (pin 1)

1.65

5.5

VGND(1)

Negative supply voltage (pins 6, 12, 16 and 26)

VpIO(1)

Voltage for peripheral IO communication pins

(27 to 32)

05.5

Vp5V(1)

Voltage for other pins (9, 11, 13, 14, 15 and 17)

in the 5 V domain

05.5

Vp3V(1)

Voltage for other pins (5, 7, 18 to 20 and 22 to 24)

in the 3 V domain

03.6

T(amb, VFQFPN32)(4)

4. The device must be mounted on a PCB with sufficient heat dissipation.

Ambient temperature range for VFQFPN32 package

-40

105

°C

VRFI_A

RFI input amplitude(5)

5. The minimum RFI input signal definition is meant for NFC active P2P reception and NFC passive target

reception. In HF reader mode and NFC transmit mode the recommended signal level is 2.5 VPP.

0.15

VPP

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