Datasheet > NXT4556AUR

NXT4556AUR

更新时间： 2024-04-09 18:59:06

品牌	Logo	应用领域
安世 - NEXPERIA		/
页数	文件大小	规格书
19页	8116K
描述
SIM card interface level translatorProduction

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NXT4556AUR 数据手册

Nexperia

NXT4556AUR

SIM card interface level translator

dis(UVLO_AC)

CC_SIM

RST_SIM

CLK_SIM

IO_SIM

aaa-034881

Δt = 4 µs (typical)

The shaded areas indicate that the signals are HIGH or LOW.

Fig. 5. Shutdown sequence for RST_SIM, CLK_SIM and IO_SIM of NXT4556 SIM card

translator

8.4. UVLO

When V_{CC_SIM}drops below V_{dis(UVLO_AC)}, the translator goes to shut down mode. This is illustrated

in Fig. 5. The switching level V_{dis(UVLO_AC)}has a high value of approximately 86 % × V_{CC_SIM}

The circuitry uses an AC detection mechanism that operates accurately with a falling slope that

is typical in the SIM card application. Next to this AC detection, a standard UVLO detection is

in place that has no condition with respect to the slope of the rising or falling V_{CC_SIM}. For the

standard UVLO, the parameters V_en(UVLO)and V_dis(UVLO)are involved which have lower values

than V_{dis(UVLO_AC)}. When V_{CC_SIM}is powered up, the translator is enabled when V_{CC_SIM}crosses

V_en(UVLO)

8.5. EMI filter

All output driver stages of I/O, RST and CLK channels are equipped with EMI filters to reduce

interference towards sensitive mobile communication.

8.6. ESD protection

The device has robust ESD protections on all SIM card pins. The architecture prevents any stress

for the host: the voltage translator discharges any stress to supply ground.

NXT4556AUR

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 1 — 5 December 2023

7 / 19

1...4 5 678 9 10...19

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