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NXP Semiconductors NVT4556BUKZ
- Part No.:
- NVT4556BUKZ
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 12-XFBGA
- Datasheet:
-
NVT4556BUKZ.pdf
- Description:
- IC INTERFACE SPECIALIZED 12WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:490
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Product details
Overview
NVT4556BUKZ from NXP Semiconductors is a SIM card interface level translator with integrated LDO, designed to bridge low-voltage host microcontrollers (1.55 V–3.6 V) and ISO/IEC 7816-compliant SIM cards. It provides dual selectable SIM supply voltages (1.8 V or 3.0 V), three bidirectional level translation paths (IO, RSTn, CLKn), and I²C-bus control for voltage selection and device enable/disable - enabling dual- or triple-SIM functionality from a single host port in mobile phones and wireless modems.
For engineers reviewing the NVT4556BUKZ datasheet, NVT4556BUKZ pinout, NVT4556BUKZ application, or NVT4556BUKZ equivalent, key selection criteria include its WLCSP12 package footprint, 12-ball bump mapping, factory-programmed I²C slave address (0xC2), UVLO-triggered shutdown sequence, and support for CLK stop mode with latch capability across multiple devices sharing one host port.
Technical Context
The NVT4556BUKZ integrates a PMOS-based LDO with 100 mV dropout at 50 mA and 60 dB PSRR at 1 kHz, delivering regulated VSIM output while maintaining independent level translation paths even when the LDO is disabled via I²C. Its automatic direction-control architecture eliminates external direction signals for the IO_SIM/IO_HOST channel, using edge-detection and one-shot circuits to manage bidirectional data flow without bus contention.
Shutdown is initiated either by VCC falling below 1.2 V (UVLO), by de-asserting RST_HOST/EN (when configured as hardware enable), or by writing bit 0 = 0 (when RST_HOST/EN is in pass-through mode). All three SIM-side outputs (RST_SIM, CLK_SIM, IO_SIM) and VSIM are sequentially driven LOW within microseconds using internal pull-downs, satisfying ISO/IEC 7816-3 hot-swap requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO Output Voltage | Selectable 1.8 V or 3.0 V via I²C write; supports dual-voltage SIM cards without external regulators. |
| Input Voltage Range (VBAT) | 2.5 V to 5.25 V; compatible with standard Li-ion battery rails in mobile handsets. |
| Host I/O Voltage Range (VCC) | 1.55 V to 3.6 V; interfaces directly with modern low-power application processors and MCUs. |
| I²C Bus Speed | Up to 400 kHz Fast-mode; enables fast configuration of LDO voltage and device enable state. |
| ESD Protection (SIM pins) | ±8 kV per IEC 61000-4-2 contact discharge; meets ETSI/IMT-2000 robustness requirements. |
| Shutdown Current | < 3 µA; allows ultra-low-power retention during SIM card standby or hot-swap events. |
| Propagation Delay | 15–25 ns (host ↔ SIM); ensures timing compliance for >5 MHz clock operation and ISO 7816-3 signaling. |
Pinout & Package
Package: 12-pin Wafer-Level Chip-Scale Package (WLCSP12), 1.205 mm × 1.605 mm × 0.412 mm, 0.4 mm pitch, backside coating included.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IO_HOST (A1) | Bidirectional host data I/O | Open-drain interface to host processor; requires external pull-up to VCC. |
| GND (A2) | Common ground reference | Shared ground for host and SIM sides; critical for ESD performance and noise isolation. |
| VCC (A3) | Host-side power & enable input | Supplies host I/Os and acts as hardware enable; draws ≤100 µA; UVLO threshold = 1.2–1.5 V. |
| RST_HOST/EN (B1) | Configurable reset or enable input | Programmable via I²C bit 6: pass-through reset signal or logic-level enable/disable control. |
| SDA (B2) | I²C serial data line | Open-drain bidirectional data; requires external pull-up; supports Standard/Fast-mode (≤400 kHz). |
| VBAT (B3) | LDO input supply | Accepts 2.5–5.25 V battery input; bypassed with 1.0 µF ceramic capacitor near pin. |
| CLK_HOST (C1) | Host clock input | Unidirectional clock from host MCU to NVT4556; level-translated to SIM side. |
| SCL (C2) | I²C serial clock line | Master-generated clock; open-drain; requires external pull-up. |
| VSIM (C3) | Regulated SIM supply output | 1.8 V or 3.0 V output; bypassed with 4.7 µF ceramic capacitor; supports up to 50 mA load. |
| CLK_SIM (D1) | SIM clock output | Level-translated clock signal to SIM card; includes integrated EMI filter (200 Ω series + 45 pF). |
| RST_SIM (D2) | SIM reset output | Active-low reset signal to SIM card; driven LOW during shutdown sequence per ISO 7816-3. |
| IO_SIM (D3) | Bidirectional SIM data I/O | Automatic direction control; no external direction signal required; includes EMI filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed I²C slave address | NVT4556BUKZ uses fixed 7-bit address 0x61 (0xC2 write byte); eliminates address conflict in multi-device systems. |
| ISO/IEC 7816-3 compliant shutdown | Hardware-initiated, sequenced disable of RST_SIM → CLK_SIM → IO_SIM → VSIM in microseconds to prevent data corruption during hot swap. |
| CLK stop & I/O latch mode | Bit 4 toggle latches host I/O states onto SIM side, freeing host port to drive secondary NVT4556 on same bus. |
| Integrated EMI filters on SIM-side pins | 200 Ω series resistance + 45 pF capacitance on CLK_SIM/RST_SIM/IO_SIM reduces radiated emissions per EN 301 489-1. |
| Low-dropout LDO with high PSRR | 100 mV dropout at 50 mA; 60 dB PSRR @ 1 kHz ensures clean SIM supply despite noisy battery rail. |
Applications
| Mobile Handset Dual-SIM Interface | Wireless Modem SIM Management |
|---|---|
Use Scenario: Enabling second SIM slot in space-constrained smartphones using a single host SIM controller port. IC Role / Device Role / Timing Role: Level translator and LDO providing voltage selection, signal isolation, and ISO 7816-3-compliant hot-swap sequencing. Use Value: Reduces GPIO count and PCB area versus discrete solutions; supports simultaneous 1.8 V and 3.0 V SIM cards via I²C configuration. |
Use Scenario: Integrating SIM card support into LTE/5G cellular modems where host processor I/O voltage (1.8 V) differs from legacy SIM requirements (3.0 V). IC Role / Device Role / Timing Role: Bidirectional level shifter with programmable LDO output and precise propagation delay (≤25 ns) for reliable clock/data alignment. Use Value: Eliminates need for external voltage translators and regulators; maintains full ISO 7816 timing margins at 5 MHz clock rates. |
| SIM Card Terminal Power Management | Industrial M2M Device Hot-Swap Support |
Use Scenario: Powering and interfacing SIM cards in payment terminals where battery backup and low quiescent current are critical. IC Role / Device Role / Timing Role: LDO with <3 µA shutdown current and UVLO-triggered safe shutdown sequence for battery-backed operation. Use Value: Extends backup runtime; prevents SIM corruption during brownout or battery removal via ISO 7816-3 shutdown behavior. |
Use Scenario: Remote asset trackers requiring field-replaceable SIM cards without system reboot or host intervention. IC Role / Device Role / Timing Role: Hardware-enforced, sub-microsecond shutdown initiation on VCC drop or RST_HOST/EN de-assertion. Use Value: Enables true hot-swap without software coordination; avoids firmware lockup or SIM state corruption during card insertion/removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SIM card interface translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NVT4556AUKZ | Different factory-programmed I²C slave address (0xC0 vs. 0xC2); identical electrical specs and pinout. | Same functional role; used when I²C bus requires distinct addressing for multi-device configurations. | Select NVT4556AUKZ only if address 0xC0 is needed; otherwise NVT4556BUKZ is drop-in compatible. |
| MAX16080ETL+ | Single-supply SIM interface IC with fixed 3.0 V LDO output only; no 1.8 V option; no I²C control; different pinout (16-pin TQFN). | Targeted at cost-sensitive 3.0 V-only designs; lacks dual-voltage flexibility and I²C configurability of NVT4556BUKZ. | Choose MAX16080ETL+ only for fixed 3.0 V systems with no requirement for software-configurable voltage or multi-SIM expansion. |
Compared with NVT4556AUKZ, NVT4556BUKZ offers identical performance but enables I²C address differentiation in multi-translator systems; compared with MAX16080ETL+, it adds 1.8 V support, I²C programmability, and WLCSP12 size reduction - critical for compact mobile designs requiring flexible SIM voltage management.
Availability
NVT4556BUKZ is available at Aetrix Electronics and suitable for mobile handset design, wireless modem integration, and industrial M2M terminal development requiring stable component supply, long-term lifecycle support, and RoHS-compliant wafer-level packaging.
Supply support for NVT4556BUKZ 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 leader specializing in secure connectivity solutions for automotive, industrial, and mobile applications, with core expertise in interface ICs, RF, and smart card technologies.
The NVT4556 product line was developed specifically to simplify SIM card integration in battery-powered portable devices, reducing bill-of-materials and PCB complexity while ensuring full compliance with ETSI, IMT-2000, and ISO/IEC 7816 standards.
FAQ
What is the I²C slave address for NVT4556BUKZ?
The NVT4556BUKZ uses a factory-programmed 7-bit I²C slave address of 0x61, corresponding to an 8-bit write address of 0xC2 (0x61 << 1 | 0). This distinguishes it from NVT4556AUKZ (0xC0) and NVT4556CUK (0xC4), allowing multiple NVT4556 devices on the same I²C bus. The address is hardwired and cannot be modified in-circuit.
How does NVT4556BUKZ handle SIM card hot-swap events?
The NVT4556BUKZ implements ISO/IEC 7816-3-compliant hot-swap handling: when VCC drops below 1.2 V (UVLO threshold), it initiates a sequenced shutdown - driving RST_SIM LOW first, then CLK_SIM, IO_SIM, and finally VSIM - all within microseconds using internal pull-downs. This prevents data corruption and ensures safe SIM card insertion/removal without host software intervention.
Can NVT4556BUKZ operate with a 1.8 V host I/O supply?
Yes, NVT4556BUKZ supports host-side operating voltages from 1.55 V to 3.6 V, including 1.8 V. Its VCC pin powers the host I/Os (CLK_HOST, RST_HOST/EN, IO_HOST) and serves as a logic-level enable input. At 1.8 V, the device draws ≤100 µA and maintains full level translation functionality between host and SIM sides.
What is the maximum clock frequency supported by NVT4556BUKZ?
The NVT4556BUKZ supports SIM card clock frequencies up to 5 MHz, as confirmed by propagation delay specifications (15–25 ns) and dynamic characterization in the datasheet. Its CLK_SIM output meets ISO/IEC 7816 timing requirements for Class A (5 V), B (3 V), and C (1.8 V) cards, and it also supports CLK stop mode for multi-SIM arbitration.
Does NVT4556BUKZ require external pull-up resistors on I²C lines?
Yes, NVT4556BUKZ requires external pull-up resistors on both SCL and SDA pins because they are open-drain I/Os. Typical values range from 2.2 kΩ to 10 kΩ depending on bus capacitance and speed (≤400 kHz Fast-mode). Pull-ups must connect to the host-side VCC (not VSIM or VBAT) to ensure proper logic levels during I²C communication.
NVT4556BUKZ 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
NVT4556BUKZ FAQ
1.How can I place an order for NVT4556BUKZ through Aetrix?
Please submit a Request for Quotation (RFQ) for NVT4556BUKZ 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 NVT4556BUKZ reliable?
The price and inventory of NVT4556BUKZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NVT4556BUKZ is usually 5 days.
3.What payment methods are accepted for NVT4556BUKZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NVT4556BUKZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NVT4556BUKZ?
NVT4556BUKZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NVT4556BUKZ 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 NVT4556BUKZ?
For technical support, including NVT4556BUKZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NVT4556BUKZ requirements.
6.How does Aetrix verify that NVT4556BUKZ is sourced from the original manufacturer or authorized distributors?
All NVT4556BUKZ 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 NVT4556BUKZ meets industry standards.
7.What is the process for return or replacement of NVT4556BUKZ?
All NVT4556BUKZ units undergo pre-shipment inspection (PSI). If there is an issue with NVT4556BUKZ, 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 NVT4556BUKZ part is unused and in its original packaging.
Return procedure for NVT4556BUKZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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