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NXP Semiconductors NVT4556AUKZ
- Part No.:
- NVT4556AUKZ
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 12-XFBGA
- Datasheet:
-
NVT4556AUKZ.pdf
- Description:
- IC INTERFACE SPECIALIZED 12WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:449
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Product details
Overview
NVT4556AUKZ from NXP Semiconductors is a SIM card interface level translator IC with integrated LDO regulator and I²C-bus control. It provides bidirectional level translation for IO, RSTn, and CLKn signals between a 1.55–3.6 V host microcontroller and ISO/IEC 7816-compliant SIM cards, delivers selectable 1.8 V or 3.0 V SIM supply (up to 50 mA), and supports clock stop mode for dual-SIM expansion. It is used in mobile phones and wireless modems requiring ETSI/IMT-2000/ISO-7816 compliance.
For engineers reviewing the NVT4556AUKZ datasheet, NVT4556AUKZ pinout, NVT4556AUKZ application, or NVT4556AUKZ equivalent, key selection considerations include its 12-pin WLCSP package, I²C-controlled LDO voltage selection (1.8 V / 3.0 V), ±8 kV IEC61000-4-2 ESD protection on SIM pins, shutdown current <1 µA, and support for hot-swap compliant ISO-7816-3 shutdown sequencing.
Technical Context
The NVT4556AUKZ integrates three independent level-shifting channels (IO, RST_SIM, CLK_SIM) with automatic direction control and capacitive isolation, plus a PMOS-based LDO with 100 mV dropout at 50 mA. Its I²C interface (Standard/Fast-mode, up to 400 kHz) controls both LDO output voltage and device enable/disable state via a single 8-bit register (address 00h).
It implements ISO-7816-3-compliant shutdown sequencing triggered by VCC UVLO (<1.5 V), RST_HOST/EN deassertion (when configured as hardware enable), or I²C write (bit 0 = 0). The device supports clock stop/latch mode (bit 4 = 1) to enable multi-SIM operation from one host port, requiring distinct I²C slave addresses (NVT4556AUKZ = 0xC0h).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO Output Voltage | Selectable 1.8 V (±0.1 V) or 3.0 V (±0.15 V) via I²C; enables dual-voltage SIM card support without external regulators. |
| Input Voltage Range (VBAT) | 2.5 V to 5.25 V; accepts standard mobile battery rails while maintaining regulation stability. |
| Host I/O Voltage Range (VCC) | 1.55 V to 3.6 V; compatible with modern low-voltage microcontrollers and GPIOs. |
| Shutdown Current | <1 µA (VCC = 0 V); minimizes system standby power in SIM-inactive states. |
| I²C Bus Speed | Up to 400 kHz Fast-mode; allows rapid configuration of LDO voltage and enable state during boot or SIM hot-swap. |
| ESD Protection (SIM pins) | ±8 kV contact discharge per IEC61000-4-2; ensures robustness against user-handling events in portable devices. |
| Propagation Delay | 15–25 ns (host ↔ SIM); preserves signal timing integrity for >5 MHz SIM clock operation. |
Pinout & Package
Package: 12-ball WLCSP (1.205 mm × 1.605 mm × 0.412 mm, 0.4 mm pitch), Pb-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IO_HOST (A1) | Host-side bidirectional data I/O | Open-drain interface to host MCU; automatically detects direction and prevents bus contention. |
| GND (A2) | Common ground reference | Shared ground for host and SIM sides; critical for ESD performance and noise immunity. |
| VCC (A3) | Host I/O supply & hardware enable | Provides power to host-side pins and acts as logic-level enable; draws ≤100 µA when active. |
| RST_HOST/EN (B1) | Configurable reset/enable input | Programmable via I²C bit 6: pass-through reset signal or hardware enable/disable control. |
| SDA (B2) | I²C serial data line | Open-drain bidirectional I²C data; requires external pull-up; used for LDO voltage selection and device control. |
| VBAT (B3) | LDO input supply | Accepts 2.5–5.25 V battery input; bypassed with 1.0 µF ceramic capacitor for stability. |
| CLK_HOST (C1) | Host clock input | Drives internal clock translator; supports >5 MHz operation with low skew (≤2 ns). |
| SCL (C2) | I²C serial clock line | Open-drain I²C clock input; requires external pull-up; synchronizes all register writes and reads. |
| VSIM (C3) | SIM card supply output | Delivers regulated 1.8 V or 3.0 V to SIM; bypassed with 4.7 µF ceramic capacitor for transient response. |
| CLK_SIM (D1) | SIM clock output | Level-translated clock output to SIM; includes integrated EMI filter (200 Ω series + 45 pF). |
| RST_SIM (D2) | SIM reset output | Active-low reset signal to SIM; driven LOW during ISO-7816-3 shutdown sequence. |
| IO_SIM (D3) | SIM-side bidirectional data I/O | Open-drain SIM interface; includes automatic direction control and EMI filtering. |
Key Features
| Feature | Design Value |
|---|---|
| ISO-7816-3 Shutdown Sequencing | Hardware-initiated (VCC UVLO or RST_HOST/EN) or I²C-triggered shutdown ensures glitch-free SIM deactivation during hot-swap. |
| Multi-SIM Clock Stop Mode | Bit 4 latch command freezes IO_HOST/CLK_HOST/RST_HOST states onto SIM side, freeing host port for secondary NVT4556. |
| Integrated EMI Filters | 200 Ω series resistance + 45 pF capacitance on all SIM-side signals (IO_SIM, CLK_SIM, RST_SIM) reduces radiated emissions. |
| Low-Dropout LDO | 100 mV dropout at 50 mA load enables stable 1.8 V/3.0 V SIM supply even at low battery voltages (e.g., VBAT = 2.9 V). |
| Factory-Programmed Slave Address | NVT4556AUKZ uses fixed I²C address 0xC0h (7-bit 0x60), eliminating address conflict risk in multi-device systems. |
Applications
| Mobile Handsets | Wireless Modems |
|---|---|
Use Scenario: Dual-SIM smartphone supporting simultaneous 4G/LTE and VoLTE services with independent voltage requirements. IC Role / Device Role / Timing Role: Level translator and LDO controller managing two ISO-7816 interfaces from one host SIM port using clock stop mode and distinct I²C addresses. Use Value: Reduces GPIO count and PCB area versus discrete solutions while maintaining ETSI/IMT-2000 compliance and hot-swap safety. |
Use Scenario: LTE Cat-M1 modem module embedded in IoT gateways requiring SIM authentication and remote firmware updates. IC Role / Device Role / Timing Role: SIM interface bridge enabling secure credential exchange between host processor and removable SIM card under varying battery conditions. Use Value: Guarantees ±8 kV ESD robustness on SIM contacts and supports 1.55–3.6 V host I/O, simplifying design across diverse host platforms. |
| SIM Card Terminals | Industrial Telematics Units |
Use Scenario: Payment terminal with hot-swappable SIM for cellular fallback during primary network outage. IC Role / Device Role / Timing Role: Enforces ISO-7816-3 shutdown sequence on VCC drop to prevent data corruption during SIM removal. Use Value: Eliminates need for external sequencers or firmware-driven delay timers, reducing BOM cost and qualification effort. |
Use Scenario: Fleet management telematics unit operating in automotive environments (-40 °C to +85 °C) with dual-SIM redundancy. IC Role / Device Role / Timing Role: Provides temperature-stable 1.8 V/3.0 V SIM supply and level translation across full industrial ambient range. Use Value: Delivers guaranteed 50 mA SIM current and PSRR >60 dB at 1 kHz, ensuring reliable operation despite engine cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SIM card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16080ETE+ | Dual-channel LDO only; no integrated level translators or I²C control; requires external GPIOs for SIM enable/reset. | Needs additional discrete level shifters and control logic; increases layout complexity and component count. | Choose when only regulated SIM supply is needed and host has spare GPIOs for signal control. |
| TI TCA9517A | I²C buffer/repeater only; no LDO, no SIM-specific shutdown sequencing, no ESD rating for SIM pins. | Cannot replace NVT4556AUKZ directly; lacks SIM power and protocol-aware safety features. | Use only as supplementary I²C extender in systems where NVT4556AUKZ handles SIM interface and TCA9517A extends bus length. |
Compared with MAX16080ETE+ and TCA9517A, the NVT4556AUKZ uniquely integrates LDO regulation, bidirectional level translation, ISO-7816-3 shutdown, and SIM-grade ESD in one WLCSP package-enabling single-chip dual-SIM support without external components or firmware sequencing.
Availability
NVT4556AUKZ is available at Aetrix Electronics and suitable for mobile handsets, wireless modems, SIM card terminals, and industrial telematics units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NVT4556AUKZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company specializing in secure connectivity solutions for automotive, industrial, and mobile applications, with leadership in interface, power management, and smart card technologies.
The NVT4556AUKZ belongs to NXP's SIM interface product line, designed specifically to simplify dual-SIM implementation in space-constrained portable devices while meeting stringent ETSI, IMT-2000, and ISO-7816 regulatory requirements.
FAQ
What is the I²C slave address for NVT4556AUKZ?
The NVT4556AUKZ uses a fixed 7-bit I²C slave address of 0x60 (1100000b), corresponding to an 8-bit write address of 0xC0h. This address is factory-programmed and cannot be changed. It is distinct from NVT4556BUK (0x61) and NVT4556CUK (0x62), allowing multiple variants to coexist on the same I²C bus without conflict. The NVT4556AUKZ does not require a subaddress since it contains only one register (00h).
How does the NVT4556AUKZ handle SIM card hot-swap events?
The NVT4556AUKZ implements ISO-7816-3-compliant hot-swap shutdown: when VCC falls below 1.5 V (UVLO threshold), it drives RST_SIM LOW first, then CLK_SIM and IO_SIM, and finally disables VSIM-all within microseconds. This sequence prevents data corruption and accidental writes during SIM removal. The same behavior occurs if RST_HOST/EN is deasserted (when configured as hardware enable) or if bit 0 is cleared via I²C.
Can the NVT4556AUKZ operate without its internal LDO?
Yes. The NVT4556AUKZ can disable its internal LDO via I²C (bit 0 = 0) while keeping all level translation paths (IO_SIM, RST_SIM, CLK_SIM) fully functional. In this mode, VSIM must be supplied externally (e.g., from a system PMIC), and VCC and VBAT must still be powered to sustain logic operation. This enables flexible power architecture where system-level regulation replaces the on-chip LDO.
What is the maximum clock frequency supported by the NVT4556AUKZ on the SIM side?
The NVT4556AUKZ supports a SIM-side clock frequency (CLK_SIM) of up to 5 MHz, as confirmed by its fo(clk) specification in the datasheet. Its propagation delay (15–25 ns) and output skew (<2 ns) ensure timing margins are maintained at this rate. The device also supports CLK stop mode, allowing the host to halt the clock while preserving I/O states-essential for multi-SIM arbitration.
Does the NVT4556AUKZ require external pull-up resistors on its I²C lines?
Yes. Both SCL and SDA pins of the NVT4556AUKZ are open-drain and require external pull-up resistors to VCC. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed (Standard-mode vs. Fast-mode). These resistors are mandatory for proper I²C communication; omission will prevent register access, LDO voltage selection, and device enable/disable functionality.
NVT4556AUKZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 12-XFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- SIM Card
- Interface:
- I2C
- Voltage - Supply:
- 1.55V ~ 3.6V
- Supplier Device Package:
- 12-WLCSP (1.20x1.60)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
NVT4556AUKZ FAQ
1.How can I place an order for NVT4556AUKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for NVT4556AUKZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for NVT4556AUKZ reliable?
The price and inventory of NVT4556AUKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NVT4556AUKZ is usually 5 days.
3.What payment methods are accepted for NVT4556AUKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NVT4556AUKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NVT4556AUKZ?
NVT4556AUKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NVT4556AUKZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for NVT4556AUKZ?
For technical support, including NVT4556AUKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NVT4556AUKZ requirements.
6.How does Aetrix verify that NVT4556AUKZ is sourced from the original manufacturer or authorized distributors?
All NVT4556AUKZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that NVT4556AUKZ meets industry standards.
7.What is the process for return or replacement of NVT4556AUKZ?
All NVT4556AUKZ units undergo pre-shipment inspection (PSI). If there is an issue with NVT4556AUKZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The NVT4556AUKZ part is unused and in its original packaging.
Return procedure for NVT4556AUKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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