Overview
The IP4855CX25/P,135 is an SD 3.0-compliant 6-bit bidirectional dual voltage level translator produced by NXP USA Inc. This device is designed to interface between a memory card operating at 1.8 V or 2.9 V signal levels and a host with a fixed nominal supply voltage of 1.2 V to 3.3 V. It supports various SD 3.0 and SD 2.0 modes, including SDR50, DDR50, SDR25, SDR12, high-speed, and default-speed modes. The device features an integrated voltage selectable low dropout regulator, built-in EMI filters, and robust ESD protections, making it suitable for a range of applications involving memory card interfaces.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 25-ball WLCSP (Wafer Level Chip-Size Package) |
| Package Dimensions | 2.04 mm x 2.04 mm x 0.5 mm |
| Supply Voltage Range | 1.2 V to 3.3 V |
| Memory Card Voltage Levels | 1.8 V or 2.9 V |
| Supported Modes | SD 3.0: SDR50, DDR50, SDR25, SDR12; SD 2.0: High-Speed (50 MHz), Default-Speed (25 MHz) |
| Clock Rate | Up to 100 MHz |
| Low Dropout Regulator Current | 50 mA |
| ESD Protection | 8 kV according to IEC 61000-4-2, level 4 |
| EMI Filters | Integrated to suppress higher harmonics of digital I/Os |
Key Features
- SD 3.0 specification-compliant voltage translation
- Supports up to 100 MHz clock rate
- Feedback channel for clock synchronization
- Integrated voltage selectable low dropout regulator to supply the card-side I/Os
- 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 to suppress higher harmonics of digital I/Os
- Robust ESD protections (8 kV according to IEC 61000-4-2, level 4) on card side
- Level shifting buffers to keep ESD stress away from the host (zero-clamping concept)
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 IP4855CX25/P,135? The primary function is to act as a 6-bit bidirectional dual voltage level translator for SD 3.0-compliant memory card interfaces.
- What are the supported voltage levels for the memory card? The device supports memory card voltage levels of 1.8 V or 2.9 V.
- What is the maximum clock rate supported by the device? The device supports up to 100 MHz clock rate.
- Does the device have built-in EMI filters and ESD protections? Yes, it has integrated EMI filters and robust ESD protections (8 kV according to IEC 61000-4-2, level 4).
- What types of devices typically use the IP4855CX25/P,135? It is used in smartphones, mobile handsets, digital cameras, tablet PCs, laptop computers, and SD, MMC, or microSD card readers.
- What is the package type of the IP4855CX25/P,135? The package type is a 25-ball WLCSP (Wafer Level Chip-Size Package).
- Is the device compliant with SD 3.0 specifications? Yes, it is SD 3.0-compliant and supports various modes including SDR50, DDR50, SDR25, SDR12, high-speed, and default-speed modes.
- Does the device require external resistors for pull-up and pull-down functions? No, it has integrated pull-up and pull-down resistors.
- What is the current capacity of the low dropout regulator? The low dropout regulator can supply up to 50 mA.
- Is the device still in production? No, the device is no longer manufactured and is listed as obsolete.
