Ufs Bga 254 Datasheet Updated May 2026

The UFS BGA 254 is a high-performance Multi-Chip Package (MCP) standard that combines Universal Flash Storage (UFS) and LPDDR RAM into a single 254-ball grid array. This configuration is widely used in mid-to-high-end smartphones to save motherboard space while delivering high-speed data transfer through serial interfaces. Core Technical Specifications Package Type: BGA 254 (254-ball Ball Grid Array). Dimensions: Typically with a height ranging from to . Interface Protocols: UFS 3.1: Features speeds up to read and write. UFS 4.0: Features speeds up to read and write. Voltage Requirements: Standard supplies include VCC ( ) for NAND and VCCQ ( or ) for the controller/PHY. Operating Temperature: Generally rated from to for consumer mobile use, with automotive variants reaching . Functional Layout and Pinout UFS Memory Device Data Sheet Revision 1.10 (Dec., 2017)

The BGA 254 (Ball Grid Array 254) is a standard physical package used for high-performance mobile storage. While it often hosts eMMC (eMCP) chips, it is increasingly used for UFS 2.1 and UFS 3.1 (uMCP) memory, which combines storage and RAM into a single footprint. 1. Pinout Definition (UFS BGA 254)

The BGA 254 layout for UFS differs from standard eMMC. UFS uses a differential-signaling serial interface, which allows for full-duplex operation (simultaneous read and write). Functional Group Description Data Lanes TXP_0, TXN_0, RXP_0, RXN_0

High-speed differential pairs for Lane 0 data transmission and reception. Secondary Lanes TXP_1, TXN_1, RXP_1, RXN_1

Additional lanes used in UFS 2.1/3.1 for increased bandwidth. Reference Clock REF_CLK Synchronizes the high-speed interface. Control RESET_N Hardware reset signal. Power Supply VCC, VCCQ, VCCQ2

VCC (2.5V/3.3V) powers the NAND; VCCQ (1.2V/1.8V) powers the controller and I/O. 2. Technical Specifications

Interface Type: M-PHY (Physical Layer) using UniPro (Link Layer).

Transfer Modes: Supports HS-GEAR1/2/3. UFS 2.1 Gear 3 can reach up to 11.6 Gbps over two lanes. Ufs Bga 254 Datasheet

Dimensions: Typically a 11.5mm x 13.0mm or 12.0mm x 15.0mm package with 254 solder balls.

Durability: Professional adapters for this BGA type are rated for up to 30,000 insertions. 3. Application in Repair & Diagnostics

Technicians use specialized hardware to interface with these chips for data recovery or firmware repair:

Hardware Compatibility: Tools like the Z3X Easy-Jtag Plus or the ICFriend 4-in-1 Socket are required.

ISP (In-System Programming): If the chip cannot be removed, ISP wires (TX, RX, CLK, RST, GND) are soldered directly to the motherboard. Keep wires under 10mm to prevent signal interference.

Common Chip Models: This package is frequently found on chips like the Samsung KM8V7001JA. 4. Key Differences: UFS vs. eMMC 254

While they share the same physical footprint (BGA 254), they are not electrically compatible: The UFS BGA 254 is a high-performance Multi-Chip

The UFS BGA 254 is a standardized high-performance Ball Grid Array (BGA) package widely used in modern flagship and mid-range smartphones to house Universal Flash Storage (UFS) controllers and memory. Named for its 254-ball grid configuration, this package facilitates high-speed, full-duplex data transfers using the MIPI M-PHY physical layer. Technical Architecture and Standards

UFS technology, governed by JEDEC standards, replaces older eMMC and SD card technologies by utilizing a serial interface with differential signaling.

Communication Protocol: Operates on the SCSI architectural model, supporting Command Queuing (CQ) to manage multiple read/write requests simultaneously.

Data Transfer: Unlike half-duplex eMMC, UFS features dedicated paths for simultaneous reading and writing, significantly increasing bandwidth. Performance Tiers:

UFS 2.1: Achieves peak bandwidths of 5.8 Gbps (HS-G2) to 11.6 Gbps (HS-G3) across two lanes.

UFS 3.1: Optimized for higher sequential speeds and power efficiency.

UFS 4.0: Offers up to 4,200 MB/s read speeds and 23.2 Gbps data transfers per lane. Physical Specifications JEDEC UFS standard conformance (UFS v2

The BGA 254 package typically features a compact footprint designed for high-density mobile PCBs. Specification Package Dimensions

Typically 11mm x 13mm; thickness varies (0.85mm to 1.0mm) by capacity. Ball Count 254 solder balls arranged in an array. Storage Capacities Available in variants from 64GB up to 1TB. Interchangeability

Some sockets support a 2-in-1 configuration for both eMMC 254 and UFS 254 pins, though their internal protocols (parallel vs. serial) differ. Pinout and Electrical Characteristics

A standard UFS BGA 254 datasheet includes specific critical signal lines for communication and power. UFS 4.0 | Universal Flash Storage - Samsung Semiconductor

Compliance and standards

How to Read a UFS BGA 254 Datasheet: Step-by-Step

If you have a vendor-specific datasheet (e.g., "Samsung KLUFG8RHDA-B0D1"), follow this workflow:

  1. Check Part Number Decoder: Identify capacity (256GB?), voltage grade, and temperature range (commercial 0°C to 70°C vs. industrial -40°C to 85°C).
  2. Go Straight to Ball Map (Section 4): Verify A1 location. Print it at 1:1 scale and overlay with your footprint.
  3. Read Power Sequencing Diagram (Section 6.2): Do not assume; every vendor has subtle changes.
  4. Study Timing Diagrams (Section 7): Pay attention to tRST (reset minimum pulse width), tINIT1 (initialization after reset), and tRC (read command to data output).
  5. Review Descriptors (Section 9): Identify which UFS features are enabled (e.g., HPB, Write Booster, RPMB).
  6. Verify Reliability Data (Section 12): TBW (Terabytes Written) rating for your application—100TBW is common for 256GB, but check.
  7. Application Note (Section 14): Read the errata. Every datasheet has a list of known silicon issues and workarounds.

Common Pitfalls When Using UFS BGA 254 Datasheets

Even seasoned engineers make mistakes. Avoid these:

Compliance and Standards: What the Datasheet Must Reference

A legitimate UFS BGA 254 Datasheet always cites JEDEC standards. Look for these references:

Additionally, many datasheets include compliance to: