Overview
The NVT4857UKAZ, produced by NXP USA Inc., is a highly integrated, SD 3.0-compliant bidirectional dual voltage level translator. This device is designed to facilitate communication between host systems and memory cards, such as SD, microSD, and MMC cards, by translating voltage levels between the host and the memory card interfaces. It features auto-direction control, an integrated low dropout voltage regulator, and supports various bus speed modes as specified in the SD 3.0 standard.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | 20-WLCSP (Wafer Level Chip Scale Package) |
| Supply Voltage Range | 1.2 V to 5.5 V (VCCA), 1.8 V (VSD) |
| Bus Speed Modes | Default-Speed, High-Speed, SDR12, SDR25, SDR50, SDR104, DDR50 |
| Signal Levels | 3.3 V and 1.8 V |
| Clock Rates | Up to 208 MHz |
| Data Rates | Up to 104 MB/s |
| Propagation Delay | 10.0 ns (max) for card to host, 4.5 ns (max) for host to card |
| Integrated Voltage Regulator | Low dropout voltage regulator (LDO) for card-side supply |
Key Features
- SD 3.0-compliant bidirectional dual voltage level translator
- Auto-direction control with automatic enable and disable based on VSD voltage
- Integrated low dropout voltage regulator (LDO) for card-side supply
- Supports multiple bus speed modes including Default-Speed, High-Speed, SDR12, SDR25, SDR50, SDR104, and DDR50
- Low propagation delay times for high-speed data transfer
- Compact 20-WLCSP package
Applications
The NVT4857UKAZ is designed for use in various applications requiring communication between host systems and memory cards, such as:
- Smartphones and mobile devices
- Digital cameras and camcorders
- Tablets and e-readers
- Embedded systems requiring SD, microSD, or MMC card interfaces
Q & A
- What is the NVT4857UKAZ?
The NVT4857UKAZ is an SD 3.0-compliant bidirectional dual voltage level translator produced by NXP USA Inc. - What package type does the NVT4857UKAZ use?
The NVT4857UKAZ is packaged in a 20-WLCSP (Wafer Level Chip Scale Package) - What are the supported bus speed modes?
The device supports Default-Speed, High-Speed, SDR12, SDR25, SDR50, SDR104, and DDR50 bus speed modes - What are the signal levels supported by the NVT4857UKAZ?
The device supports signal levels of 3.3 V and 1.8 V - How does the auto-direction control work?
The device features auto-direction control with automatic enable and disable based on the VSD voltage level - What is the purpose of the integrated low dropout voltage regulator?
The integrated LDO provides the supply voltage for the voltage translators and the card-side input/output stages - What are the typical applications for the NVT4857UKAZ?
Typical applications include smartphones, digital cameras, tablets, and other embedded systems using SD, microSD, or MMC cards - What are the maximum clock rates supported by the NVT4857UKAZ?
The device supports clock rates up to 208 MHz - What are the maximum data rates supported by the NVT4857UKAZ?
The device supports data rates up to 104 MB/s - What is the propagation delay of the NVT4857UKAZ?
The propagation delay is up to 10.0 ns for card to host and up to 4.5 ns for host to card - How does the device handle power management?
The device automatically enables or disables based on the VSD voltage level, and it includes an integrated LDO for power management
