Overview
The IP4855CX25Z, produced by Nexperia USA Inc., is a highly specialized integrated circuit designed to serve as a memory card interface. This device is an SD 3.0-compliant 6-bit bidirectional dual voltage level translator, enabling seamless communication between a memory card and a host device operating at different voltage levels. It supports various SD modes, including SDR104, SDR50, DDR50, SDR25, SDR12, high-speed, and default-speed modes, making it versatile for a range of applications.
Key Specifications
| Parameter | Description |
|---|---|
| Type Number | IP4855CX25 |
| Package Name | WLCSP25 (wafer level chip-size package; 25 bumps; 5x5; 2.04x2.04x0.5 mm) |
| Supply Voltage Range | 1.7 V to 3.6 V (host side), 1.8 V or 2.9 V (memory card side) |
| Clock Rate | Up to 208 MHz |
| Bus Speed Modes | Default-Speed (25 MHz), High-Speed (50 MHz), SDR12, SDR25, SDR50, DDR50 |
| ESD Protection | 8 kV according to IEC 61000-4-2, level 4 on card side |
| Low Dropout Voltage Regulator | 100 mA to supply the card-side I/Os |
| Integrated Components | EMI filters, pull-up and pull-down resistors |
Key Features
- SD 3.0 specification-compliant voltage translation to support various SD modes.
- Supports up to 208 MHz clock rate.
- Feedback channel for clock synchronization.
- Low power consumption by push-pull output stage with break-before-make architecture.
- Integrated pull-up and pull-down resistors: no external resistors required.
- Integrated EMI filters suppress higher harmonics of digital I/Os.
- Integrated 8 kV ESD protection according to IEC 61000-4-2, level 4 on card side.
- Level shifting buffers keep ESD stress away from the host (zero-clamping concept).
- 25-ball WLCSP; pitch 0.4 mm.
- Pb-free, RoHS compliant, and free of halogen and antimony (Dark Green compliant).
Applications
- Smartphones
- Mobile handsets
- Digital cameras
- Tablet PCs
- Laptop computers
- SD, MMC, or microSD card readers.
Q & A
- What is the primary function of the IP4855CX25Z? The IP4855CX25Z is a 6-bit bidirectional dual voltage level translator designed to interface between a memory card and a host device operating at different voltage levels.
- Which SD modes does the IP4855CX25Z support? It supports SDR104, SDR50, DDR50, SDR25, SDR12, high-speed, and default-speed modes.
- What is the maximum clock rate supported by the IP4855CX25Z? Up to 208 MHz.
- What type of ESD protection does the IP4855CX25Z offer? 8 kV according to IEC 61000-4-2, level 4 on the card side.
- Does the IP4855CX25Z require external resistors? No, it has integrated pull-up and pull-down resistors.
- What is the package type and size of the IP4855CX25Z? 25-ball WLCSP; pitch 0.4 mm; 2.04x2.04x0.5 mm.
- Is the IP4855CX25Z RoHS compliant? Yes, it is Pb-free, RoHS compliant, and free of halogen and antimony (Dark Green compliant).
- What are the typical applications of the IP4855CX25Z? Smartphones, mobile handsets, digital cameras, tablet PCs, laptop computers, and SD, MMC, or microSD card readers.
- How does the IP4855CX25Z manage EMI? It has integrated EMI filters to suppress higher harmonics of digital I/Os.
- What is the purpose of the level shifting buffers in the IP4855CX25Z? The level shifting buffers keep ESD stress away from the host using a zero-clamping concept.
